diff --git a/.travis.yml b/.travis.yml
index c462890..08c124e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,5 @@ install:
   - mvn install:install-file -DgroupId=javax.jdo -DartifactId=jdo2-api -Dversion=2.3-ec -Dpackaging=jar -Dfile=$HOME/jdo2-api-2.3-ec.jar
 
 script:
-  - jdk_switcher use openjdk7
-  - mvn clean package
   - jdk_switcher use oraclejdk8
   - mvn clean package
diff --git a/README-zh.md b/README-zh.md
index fb060d2..3ba181a 100644
--- a/README-zh.md
+++ b/README-zh.md
@@ -10,7 +10,8 @@
 hive-third-functions 包含了一些很有用的hive udf函数，特别是数组和json函数.
 
 > 注意:
-> hive-third-functions支持hive-0.11.0或更高版本.
+> 1. hive-third-functions支持hive-0.11.0或更高版本.
+> 2. 运行`3.0.0`及以上版本需要Java8及以上
 
 ## 编译
 
@@ -40,7 +41,7 @@ mvn clean package -DskipTests
 
 你也可以直接在发布页下载打包好了最新版本 [发布页](https://github.com/aaronshan/hive-third-functions/releases).
 
-> 当前最新的版本是 `2.1.3`
+> 当前最新的版本是 `3.0.0`
 
 ## 函数
 
@@ -71,6 +72,10 @@ mvn clean package -DskipTests
 |array_value_count(array<E>, E) -> long | 统计数组中包含给定元素的个数.|
 |array_slice(array, start, length) -> array | 对数组进行分片操作，start为正数从前开始分片, start为负数从后开始分片, 长度为指定的长度.|
 |array_element_at(array&lt;E&gt;, index) -> E | 返回指定位置的数组元素. 如果索引位置 < 0, 则从尾部开始计数并返回.|
+|array_shuffle(array) -> array | 对数组shuffle.|
+|sequence(start, end) -> array<Long> | 生成数组序列.|
+|sequence(start, end, step) -> array<Long> | 生成数组序列.|
+|sequence(start_date_string, end_data_string, step) -> array<String> | 生成日期数组序列.|
 
 ### 3. map函数
 | 函数| 描述 |
@@ -145,66 +150,90 @@ mvn clean package -DskipTests
 |url_encode(value) -> string | escapes value by encoding it so that it can be safely included in URL query parameter names and values|
 |url_decode(value) -> string | unescape the URL encoded value. This function is the inverse of `url_encode`. | 
 
+### 10. 数学函数
+
+| function| description |
+|:--|:--|
+|infinity() -> double | 获取正无穷常数|
+|is_finite(x) -> boolean | 判断x是否为有限数值|
+|is_infinite(x) -> boolean |判断x是否为无穷数值|
+|is_nan(x) -> boolean | 判断x是否不是一个数值类型的变量|
+|nan() -> double | 获取一个表示NAN（not-a-number）的常数 |
+|from_base(string, radix) -> bigint | 获取字面量的值，该值的基数为radix|
+|to_base(x, radix) -> varchar | 返回x以radix为基数的字面量|
+|cosine_similarity(x, y) -> double | 返回两个稀疏向量的余弦相似度|
+
+
 ## 用法
 
 将下面这些内容写入 `${HOME}/.hiverc` 文件, 或者也可以按需在hive命令行环境中执行.
 
 ```
 add jar ${jar_location_dir}/hive-third-functions-${version}-shaded.jar
-create temporary function array_contains as 'cc.shanruifeng.functions.array.UDFArrayContains';
-create temporary function array_equals as 'cc.shanruifeng.functions.array.UDFArrayEquals';
-create temporary function array_intersect as 'cc.shanruifeng.functions.array.UDFArrayIntersect';
-create temporary function array_max as 'cc.shanruifeng.functions.array.UDFArrayMax';
-create temporary function array_min as 'cc.shanruifeng.functions.array.UDFArrayMin';
-create temporary function array_join as 'cc.shanruifeng.functions.array.UDFArrayJoin';
-create temporary function array_distinct as 'cc.shanruifeng.functions.array.UDFArrayDistinct';
-create temporary function array_position as 'cc.shanruifeng.functions.array.UDFArrayPosition';
-create temporary function array_remove as 'cc.shanruifeng.functions.array.UDFArrayRemove';
-create temporary function array_reverse as 'cc.shanruifeng.functions.array.UDFArrayReverse';
-create temporary function array_sort as 'cc.shanruifeng.functions.array.UDFArraySort';
-create temporary function array_concat as 'cc.shanruifeng.functions.array.UDFArrayConcat';
-create temporary function array_value_count as 'cc.shanruifeng.functions.array.UDFArrayValueCount';
-create temporary function array_slice as 'cc.shanruifeng.functions.array.UDFArraySlice';
-create temporary function array_element_at as 'cc.shanruifeng.functions.array.UDFArrayElementAt';
-create temporary function bit_count as 'cc.shanruifeng.functions.bitwise.UDFBitCount';
-create temporary function bitwise_and as 'cc.shanruifeng.functions.bitwise.UDFBitwiseAnd';
-create temporary function bitwise_not as 'cc.shanruifeng.functions.bitwise.UDFBitwiseNot';
-create temporary function bitwise_or as 'cc.shanruifeng.functions.bitwise.UDFBitwiseOr';
-create temporary function bitwise_xor as 'cc.shanruifeng.functions.bitwise.UDFBitwiseXor';
-create temporary function map_build as 'cc.shanruifeng.functions.map.UDFMapBuild';
-create temporary function map_concat as 'cc.shanruifeng.functions.map.UDFMapConcat';
-create temporary function map_element_at as 'cc.shanruifeng.functions.map.UDFMapElementAt';
-create temporary function map_equals as 'cc.shanruifeng.functions.map.UDFMapEquals';
-create temporary function day_of_week as 'cc.shanruifeng.functions.date.UDFDayOfWeek';
-create temporary function day_of_year as 'cc.shanruifeng.functions.date.UDFDayOfYear';
-create temporary function type_of_day as 'cc.shanruifeng.functions.date.UDFTypeOfDay'; 
-create temporary function zodiac_cn as 'cc.shanruifeng.functions.date.UDFZodiacSignCn';
-create temporary function zodiac_en as 'cc.shanruifeng.functions.date.UDFZodiacSignEn';
-create temporary function pinyin as 'cc.shanruifeng.functions.string.UDFChineseToPinYin';
-create temporary function md5 as 'cc.shanruifeng.functions.string.UDFMd5';
-create temporary function sha256 as 'cc.shanruifeng.functions.string.UDFSha256';
-create temporary function json_array_get as 'cc.shanruifeng.functions.json.UDFJsonArrayGet';
-create temporary function json_array_length as 'cc.shanruifeng.functions.json.UDFJsonArrayLength';
-create temporary function json_array_extract as 'cc.shanruifeng.functions.json.UDFJsonArrayExtract';
-create temporary function json_array_extract_scalar as 'cc.shanruifeng.functions.json.UDFJsonArrayExtractScalar';
-create temporary function json_extract as 'cc.shanruifeng.functions.json.UDFJsonExtract';
-create temporary function json_extract_scalar as 'cc.shanruifeng.functions.json.UDFJsonExtractScalar';
-create temporary function json_size as 'cc.shanruifeng.functions.json.UDFJsonSize';
-create temporary function id_card_province as 'cc.shanruifeng.functions.card.UDFChinaIdCardProvince';
-create temporary function id_card_city as 'cc.shanruifeng.functions.card.UDFChinaIdCardCity';
-create temporary function id_card_area as 'cc.shanruifeng.functions.card.UDFChinaIdCardArea';
-create temporary function id_card_birthday as 'cc.shanruifeng.functions.card.UDFChinaIdCardBirthday';
-create temporary function id_card_gender as 'cc.shanruifeng.functions.card.UDFChinaIdCardGender';
-create temporary function is_valid_id_card as 'cc.shanruifeng.functions.card.UDFChinaIdCardValid';
-create temporary function id_card_info as 'cc.shanruifeng.functions.card.UDFChinaIdCardInfo';
-create temporary function wgs_distance as 'cc.shanruifeng.functions.geo.UDFGeoWgsDistance';
-create temporary function gcj_to_bd as 'cc.shanruifeng.functions.geo.UDFGeoGcjToBd';
-create temporary function bd_to_gcj as 'cc.shanruifeng.functions.geo.UDFGeoBdToGcj';
-create temporary function wgs_to_gcj as 'cc.shanruifeng.functions.geo.UDFGeoWgsToGcj';
-create temporary function gcj_to_wgs as 'cc.shanruifeng.functions.geo.UDFGeoGcjToWgs';
-create temporary function gcj_extract_wgs as 'cc.shanruifeng.functions.geo.UDFGeoGcjExtractWgs';
-create temporary function url_encode as 'cc.shanruifeng.functions.url.UDFUrlEncode';
-create temporary function url_decode as 'cc.shanruifeng.functions.url.UDFUrlDecode';
+create temporary function array_contains as 'com.github.aaronshan.functions.array.UDFArrayContains';
+create temporary function array_equals as 'com.github.aaronshan.functions.array.UDFArrayEquals';
+create temporary function array_intersect as 'com.github.aaronshan.functions.array.UDFArrayIntersect';
+create temporary function array_max as 'com.github.aaronshan.functions.array.UDFArrayMax';
+create temporary function array_min as 'com.github.aaronshan.functions.array.UDFArrayMin';
+create temporary function array_join as 'com.github.aaronshan.functions.array.UDFArrayJoin';
+create temporary function array_distinct as 'com.github.aaronshan.functions.array.UDFArrayDistinct';
+create temporary function array_position as 'com.github.aaronshan.functions.array.UDFArrayPosition';
+create temporary function array_remove as 'com.github.aaronshan.functions.array.UDFArrayRemove';
+create temporary function array_reverse as 'com.github.aaronshan.functions.array.UDFArrayReverse';
+create temporary function array_sort as 'com.github.aaronshan.functions.array.UDFArraySort';
+create temporary function array_concat as 'com.github.aaronshan.functions.array.UDFArrayConcat';
+create temporary function array_value_count as 'com.github.aaronshan.functions.array.UDFArrayValueCount';
+create temporary function array_slice as 'com.github.aaronshan.functions.array.UDFArraySlice';
+create temporary function array_element_at as 'com.github.aaronshan.functions.array.UDFArrayElementAt';
+create temporary function bit_count as 'com.github.aaronshan.functions.bitwise.UDFBitCount';
+create temporary function bitwise_and as 'com.github.aaronshan.functions.bitwise.UDFBitwiseAnd';
+create temporary function array_shuffle as 'com.github.aaronshan.functions.array.UDFArrayShuffle';
+create temporary function sequence as 'com.github.aaronshan.functions.array.UDFSequence';
+create temporary function bitwise_not as 'com.github.aaronshan.functions.bitwise.UDFBitwiseNot';
+create temporary function bitwise_or as 'com.github.aaronshan.functions.bitwise.UDFBitwiseOr';
+create temporary function bitwise_xor as 'com.github.aaronshan.functions.bitwise.UDFBitwiseXor';
+create temporary function map_build as 'com.github.aaronshan.functions.map.UDFMapBuild';
+create temporary function map_concat as 'com.github.aaronshan.functions.map.UDFMapConcat';
+create temporary function map_element_at as 'com.github.aaronshan.functions.map.UDFMapElementAt';
+create temporary function map_equals as 'com.github.aaronshan.functions.map.UDFMapEquals';
+create temporary function day_of_week as 'com.github.aaronshan.functions.date.UDFDayOfWeek';
+create temporary function day_of_year as 'com.github.aaronshan.functions.date.UDFDayOfYear';
+create temporary function type_of_day as 'com.github.aaronshan.functions.date.UDFTypeOfDay'; 
+create temporary function zodiac_cn as 'com.github.aaronshan.functions.date.UDFZodiacSignCn';
+create temporary function zodiac_en as 'com.github.aaronshan.functions.date.UDFZodiacSignEn';
+create temporary function pinyin as 'com.github.aaronshan.functions.string.UDFChineseToPinYin';
+create temporary function md5 as 'com.github.aaronshan.functions.string.UDFMd5';
+create temporary function sha256 as 'com.github.aaronshan.functions.string.UDFSha256';
+create temporary function json_array_get as 'com.github.aaronshan.functions.json.UDFJsonArrayGet';
+create temporary function json_array_length as 'com.github.aaronshan.functions.json.UDFJsonArrayLength';
+create temporary function json_array_extract as 'com.github.aaronshan.functions.json.UDFJsonArrayExtract';
+create temporary function json_array_extract_scalar as 'com.github.aaronshan.functions.json.UDFJsonArrayExtractScalar';
+create temporary function json_extract as 'com.github.aaronshan.functions.json.UDFJsonExtract';
+create temporary function json_extract_scalar as 'com.github.aaronshan.functions.json.UDFJsonExtractScalar';
+create temporary function json_size as 'com.github.aaronshan.functions.json.UDFJsonSize';
+create temporary function id_card_province as 'com.github.aaronshan.functions.card.UDFChinaIdCardProvince';
+create temporary function id_card_city as 'com.github.aaronshan.functions.card.UDFChinaIdCardCity';
+create temporary function id_card_area as 'com.github.aaronshan.functions.card.UDFChinaIdCardArea';
+create temporary function id_card_birthday as 'com.github.aaronshan.functions.card.UDFChinaIdCardBirthday';
+create temporary function id_card_gender as 'com.github.aaronshan.functions.card.UDFChinaIdCardGender';
+create temporary function is_valid_id_card as 'com.github.aaronshan.functions.card.UDFChinaIdCardValid';
+create temporary function id_card_info as 'com.github.aaronshan.functions.card.UDFChinaIdCardInfo';
+create temporary function wgs_distance as 'com.github.aaronshan.functions.geo.UDFGeoWgsDistance';
+create temporary function gcj_to_bd as 'com.github.aaronshan.functions.geo.UDFGeoGcjToBd';
+create temporary function bd_to_gcj as 'com.github.aaronshan.functions.geo.UDFGeoBdToGcj';
+create temporary function wgs_to_gcj as 'com.github.aaronshan.functions.geo.UDFGeoWgsToGcj';
+create temporary function gcj_to_wgs as 'com.github.aaronshan.functions.geo.UDFGeoGcjToWgs';
+create temporary function gcj_extract_wgs as 'com.github.aaronshan.functions.geo.UDFGeoGcjExtractWgs';
+create temporary function url_encode as 'com.github.aaronshan.functions.url.UDFUrlEncode';
+create temporary function url_decode as 'com.github.aaronshan.functions.url.UDFUrlDecode';
+create temporary function infinity as 'com.github.aaronshan.functions.math.UDFMathInfinity';
+create temporary function is_finite as 'com.github.aaronshan.functions.math.UDFMathIsFinite';
+create temporary function is_infinite as 'com.github.aaronshan.functions.math.UDFMathIsInfinite';
+create temporary function is_nan as 'com.github.aaronshan.functions.math.UDFMathIsNaN';
+create temporary function nan as 'com.github.aaronshan.functions.math.UDFMathIsNaN';
+create temporary function from_base as 'com.github.aaronshan.functions.math.UDFMathFromBase';
+create temporary function to_base as 'com.github.aaronshan.functions.math.UDFMathToBase';
+create temporary function cosine_similarity as 'com.github.aaronshan.functions.math.UDFMathCosineSimilarity';
 ```
 
 你可以在hive的命令杭中使用下面的语句来查看函数的细节.
@@ -257,6 +286,11 @@ select array_concat(array(16,12,18,9,null), array(14,9,6,18,null)) => [16,12,18,
 select array_value_count(array(16,13,12,13,18,16,9,18), 13) => 2
 select array_slice(array(16,13,12,13,18,16,9,18), -2, 3) => [9,18]
 select array_element_at(array(16,13,12,13,18,16,9,18), -1) => 18
+select array_shuffle(array(16,12,18,9))
+select sequence(1, 5) => [1, 2, 3, 4, 5]
+select sequence(5, 1) => [5, 4, 3, 2, 1]
+select sequence(1, 9, 4) => [1, 5, 9]
+select sequence('2016-04-12 00:00:00', '2016-04-14 00:00:00', 24*3600*1000) => ['2016-04-12 00:00:00', '2016-04-13 00:00:00', '2016-04-14 00:00:00']
 ```
 
 ```
@@ -302,3 +336,7 @@ select gcj_extract_wgs(39.915, 116.404) => {"lng":116.39775549316407,"lat":39.91
 ```
 select url_encode('http://shanruifeng.cc/') => http%3A%2F%2Fshanruifeng.cc%2F
 ```
+
+```
+select cosine_similarity(map_build(array['a'], array[1.0]), map_build(array['a'], array[2.0])); => 1.0
+```
\ No newline at end of file
diff --git a/README.md b/README.md
index 3cce4ac..cdeb7f8 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ It will generate hive-third-functions-${version}-shaded.jar in target directory.
 
 You can also directly download file from [release page](https://github.com/aaronshan/hive-third-functions/releases).
 
-> current latest version is `2.1.3`
+> current latest version is `2.2.0`
 
 ## Functions
 
@@ -51,6 +51,22 @@ You can also directly download file from [release page](https://github.com/aaron
 |pinyin(string) -> string | convert chinese to pinyin|
 |md5(string) -> string | md5 hash|
 |sha256(string) -> string |sha256 hash|
+|codepoint(string) -> integer | Returns the Unicode code point of the only character of string.|
+|hamming_distance(string1, string2) -> bigint | Returns the Hamming distance of string1 and string2.|
+|levenshtein_distance(string1, string2) -> bigint | Returns the Levenshtein edit distance of string1 and string2.|
+|normalize(string, form) -> varchar | Transforms string with the specified normalization form. form must be be one of the following keywords: <span id="jump">Normalize Form Description</span> |
+|strpos(string, substring) -> bigint | Returns the starting position of the first instance of substring in string. Positions start with 1. If not found, 0 is returned.|
+|split_to_map(string, entryDelimiter, keyValueDelimiter) -> map&lt;varchar, varchar> | Splits string by entryDelimiter and keyValueDelimiter and returns a map. entryDelimiter splits string into key-value pairs. keyValueDelimiter splits each pair into key and value.|
+|split_to_multimap(string, entryDelimiter, keyValueDelimiter) -> map(varchar, array(varchar)) | Splits string by entryDelimiter and keyValueDelimiter and returns a map containing an array of values for each unique key. entryDelimiter splits string into key-value pairs. keyValueDelimiter splits each pair into key and value. The values for each key will be in the same order as they appeared in string.|
+
+[Normalize Form Description](#jump)
+
+| Form	| Description |
+|:--|:--|
+| NFD	| Canonical Decomposition |
+| NFC	| Canonical Decomposition, followed by Canonical Composition |
+| NFKD	| Compatibility Decomposition |
+| NFKC	| Compatibility Decomposition, followed by Canonical Composition |
 
 ### 2. array functions
 
@@ -71,12 +87,17 @@ You can also directly download file from [release page](https://github.com/aaron
 |array_value_count(array&lt;E&gt;, E) -> long | count array's element number that element value equals given value.|
 |array_slice(array, start, length) -> array | subsets array starting from index start (or starting from the end if start is negative) with a length of length.|
 |array_element_at(array&lt;E&gt;, index) -> E | returns element of array at given index. If index < 0, element_at accesses elements from the last to the first.|
+|array_shuffle(array) -> array | Generate a random permutation of the given array x.|
+|sequence(start, end) -> array<Long> | Generate a sequence of integers from start to stop.|
+|sequence(start, end, step) -> array<Long> | Generate a sequence of integers from start to stop, incrementing by step.|
+|sequence(start_date_string, end_data_string, step) -> array<String> | Generate a sequence of date string from start to stop, incrementing by step.|
+|array_value_count(array&lt;E&gt;, E) -> long | count array's element number that element value equals given value..|
 
 ### 3. map functions
 | function| description |
 |:--|:--|
 |map_build(x&lt;K&gt;, y&lt;V&gt;) -> map&lt;K, V&gt;| returns a map created using the given key/value arrays.|
-|map_concat(x&lt;K, V&gt;, y&lt;K, V&gt;) -> map&lt;K,V&gt; | returns the union of two maps. If a key is found in both `x` and `y`, that key’s value in the resulting map comes from `y`.| 
+|map_concat(x&lt;K, V&gt;, y&lt;K, V&gt;) -> map&lt;K,V&gt; | returns the union of two maps. If a key is found in both `x` and `y`, that key’s value in the resulting map comes from `y`.|
 |map_element_at(map&lt;K, V&gt;, key) -> V | returns value for given `key`, or `NULL` if the key is not contained in the map.|
 |map_equals(x&lt;K, V&gt;, y&lt;K, V&gt;) -> boolean |  whether map x equals with map y or not.|
 
@@ -87,7 +108,7 @@ You can also directly download file from [release page](https://github.com/aaron
 |day_of_week(date_string \| date) -> int | day of week,if monday,return 1, sunday return 7, error return null.|
 |day_of_year(date_string \| date) -> int | day of year. The value ranges from 1 to 366.|
 |zodiac_en(date_string \| date) -> string | convert date to zodiac|
-|zodiac_cn(date_string \| date) -> string | convert date to zodiac chinese | 
+|zodiac_cn(date_string \| date) -> string | convert date to zodiac chinese |
 |type_of_day(date_string \| date) -> string | for chinese. 获取日期的类型(1: 法定节假日, 2: 正常周末, 3: 正常工作日 4:攒假的工作日),错误返回-1. |
 
 ### 5. json functions
@@ -108,9 +129,9 @@ You can also directly download file from [release page](https://github.com/aaron
 |:--|:--|
 |bit_count(x, bits) -> bigint | count the number of bits set in `x` (treated as bits-bit signed integer) in 2’s complement representation |
 |bitwise_and(x, y) -> bigint | returns the bitwise AND of `x` and `y` in 2’s complement arithmetic.|
-|bitwise_not(x) -> bigint | returns the bitwise NOT of `x` in 2’s complement arithmetic. | 
+|bitwise_not(x) -> bigint | returns the bitwise NOT of `x` in 2’s complement arithmetic. |
 |bitwise_or(x, y) -> bigint | returns the bitwise OR of `x` and `y` in 2’s complement arithmetic.|
-|bitwise_xor(x, y) -> bigint | returns the bitwise XOR of `x` and `y` in 2’s complement arithmetic. | 
+|bitwise_xor(x, y) -> bigint | returns the bitwise XOR of `x` and `y` in 2’s complement arithmetic. |
 
 ### 7. china id card functions
 
@@ -143,7 +164,31 @@ You can also directly download file from [release page](https://github.com/aaron
 | function| description |
 |:--|:--|
 |url_encode(value) -> string | escapes value by encoding it so that it can be safely included in URL query parameter names and values|
-|url_decode(value) -> string | unescape the URL encoded value. This function is the inverse of `url_encode`. | 
+|url_decode(value) -> string | unescape the URL encoded value. This function is the inverse of `url_encode`. |
+
+### 10. math functions
+
+| function| description |
+|:--|:--|
+|infinity() -> double | Returns the constant representing positive infinity.|
+|is_finite(x) -> boolean | Determine if x is finite.|
+|is_infinite(x) -> boolean |Determine if x is infinite.|
+|is_nan(x) -> boolean | Determine if x is not-a-number.|
+|nan() -> double | Returns the constant representing not-a-number. |
+|from_base(string, radix) -> bigint | Returns the value of string interpreted as a base-radix number.|
+|to_base(x, radix) -> varchar | Returns the base-radix representation of x.|
+|cosine_similarity(x, y) -> double | Returns the cosine similarity between the sparse vectors x and y|
+|inverse_normal_cdf(mean, sd, p) -> double | Compute the inverse of the Normal cdf with given mean and standard deviation (sd) for the cumulative probability (p): P(N &lt; n). The mean must be a real value and the standard deviation must be a real and positive value. The probability p must lie on the interval (0, 1). |
+|normal_cdf(mean, sd, v) -> double | Compute the Normal cdf with given mean and standard deviation (sd): P(N < v; mean, sd). The mean and value v must be real values and the standard deviation must be a real and positive value.|
+
+### 11. regexp functions
+| function| description |
+|:--|:--|
+|regexp_like(string, pattern) -> boolean | Evaluates the regular expression pattern and determines if it is contained within string.|
+|regexp_extract_all(string, pattern) -> array(varchar) | Returns the substring(s) matched by the regular expression pattern in string. |
+|regexp_extract(string, pattern) -> varchar | Returns the first substring matched by the regular expression pattern in string.|
+|regexp_replace(string, pattern) -> varchar | Removes every instance of the substring matched by the regular expression pattern from string.|
+|regexp_replace(string, pattern, replacement) -> varchar | Replaces every instance of the substring matched by the regular expression pattern in string with replacement. |
 
 ## Use
 
@@ -151,60 +196,85 @@ Put these statements into `${HOME}/.hiverc` or exec its on hive cli env.
 
 ```
 add jar ${jar_location_dir}/hive-third-functions-${version}-shaded.jar
-create temporary function array_contains as 'cc.shanruifeng.functions.array.UDFArrayContains';
-create temporary function array_equals as 'cc.shanruifeng.functions.array.UDFArrayEquals';
-create temporary function array_intersect as 'cc.shanruifeng.functions.array.UDFArrayIntersect';
-create temporary function array_max as 'cc.shanruifeng.functions.array.UDFArrayMax';
-create temporary function array_min as 'cc.shanruifeng.functions.array.UDFArrayMin';
-create temporary function array_join as 'cc.shanruifeng.functions.array.UDFArrayJoin';
-create temporary function array_distinct as 'cc.shanruifeng.functions.array.UDFArrayDistinct';
-create temporary function array_position as 'cc.shanruifeng.functions.array.UDFArrayPosition';
-create temporary function array_remove as 'cc.shanruifeng.functions.array.UDFArrayRemove';
-create temporary function array_reverse as 'cc.shanruifeng.functions.array.UDFArrayReverse';
-create temporary function array_sort as 'cc.shanruifeng.functions.array.UDFArraySort';
-create temporary function array_concat as 'cc.shanruifeng.functions.array.UDFArrayConcat';
-create temporary function array_value_count as 'cc.shanruifeng.functions.array.UDFArrayValueCount';
-create temporary function array_slice as 'cc.shanruifeng.functions.array.UDFArraySlice';
-create temporary function array_element_at as 'cc.shanruifeng.functions.array.UDFArrayElementAt';
-create temporary function bit_count as 'cc.shanruifeng.functions.bitwise.UDFBitCount';
-create temporary function bitwise_and as 'cc.shanruifeng.functions.bitwise.UDFBitwiseAnd';
-create temporary function bitwise_not as 'cc.shanruifeng.functions.bitwise.UDFBitwiseNot';
-create temporary function bitwise_or as 'cc.shanruifeng.functions.bitwise.UDFBitwiseOr';
-create temporary function bitwise_xor as 'cc.shanruifeng.functions.bitwise.UDFBitwiseXor';
-create temporary function map_build as 'cc.shanruifeng.functions.map.UDFMapBuild';
-create temporary function map_concat as 'cc.shanruifeng.functions.map.UDFMapConcat';
-create temporary function map_element_at as 'cc.shanruifeng.functions.map.UDFMapElementAt';
-create temporary function map_equals as 'cc.shanruifeng.functions.map.UDFMapEquals';
-create temporary function day_of_week as 'cc.shanruifeng.functions.date.UDFDayOfWeek';
-create temporary function day_of_year as 'cc.shanruifeng.functions.date.UDFDayOfYear';
-create temporary function type_of_day as 'cc.shanruifeng.functions.date.UDFTypeOfDay'; 
-create temporary function zodiac_cn as 'cc.shanruifeng.functions.date.UDFZodiacSignCn';
-create temporary function zodiac_en as 'cc.shanruifeng.functions.date.UDFZodiacSignEn';
-create temporary function pinyin as 'cc.shanruifeng.functions.string.UDFChineseToPinYin';
-create temporary function md5 as 'cc.shanruifeng.functions.string.UDFMd5';
-create temporary function sha256 as 'cc.shanruifeng.functions.string.UDFSha256';
-create temporary function json_array_get as 'cc.shanruifeng.functions.json.UDFJsonArrayGet';
-create temporary function json_array_length as 'cc.shanruifeng.functions.json.UDFJsonArrayLength';
-create temporary function json_array_extract as 'cc.shanruifeng.functions.json.UDFJsonArrayExtract';
-create temporary function json_array_extract_scalar as 'cc.shanruifeng.functions.json.UDFJsonArrayExtractScalar';
-create temporary function json_extract as 'cc.shanruifeng.functions.json.UDFJsonExtract';
-create temporary function json_extract_scalar as 'cc.shanruifeng.functions.json.UDFJsonExtractScalar';
-create temporary function json_size as 'cc.shanruifeng.functions.json.UDFJsonSize';
-create temporary function id_card_province as 'cc.shanruifeng.functions.card.UDFChinaIdCardProvince';
-create temporary function id_card_city as 'cc.shanruifeng.functions.card.UDFChinaIdCardCity';
-create temporary function id_card_area as 'cc.shanruifeng.functions.card.UDFChinaIdCardArea';
-create temporary function id_card_birthday as 'cc.shanruifeng.functions.card.UDFChinaIdCardBirthday';
-create temporary function id_card_gender as 'cc.shanruifeng.functions.card.UDFChinaIdCardGender';
-create temporary function is_valid_id_card as 'cc.shanruifeng.functions.card.UDFChinaIdCardValid';
-create temporary function id_card_info as 'cc.shanruifeng.functions.card.UDFChinaIdCardInfo';
-create temporary function wgs_distance as 'cc.shanruifeng.functions.geo.UDFGeoWgsDistance';
-create temporary function gcj_to_bd as 'cc.shanruifeng.functions.geo.UDFGeoGcjToBd';
-create temporary function bd_to_gcj as 'cc.shanruifeng.functions.geo.UDFGeoBdToGcj';
-create temporary function wgs_to_gcj as 'cc.shanruifeng.functions.geo.UDFGeoWgsToGcj';
-create temporary function gcj_to_wgs as 'cc.shanruifeng.functions.geo.UDFGeoGcjToWgs';
-create temporary function gcj_extract_wgs as 'cc.shanruifeng.functions.geo.UDFGeoGcjExtractWgs';
-create temporary function url_encode as 'cc.shanruifeng.functions.url.UDFUrlEncode';
-create temporary function url_decode as 'cc.shanruifeng.functions.url.UDFUrlDecode';
+create temporary function array_contains as 'com.github.aaronshan.functions.array.UDFArrayContains';
+create temporary function array_equals as 'com.github.aaronshan.functions.array.UDFArrayEquals';
+create temporary function array_intersect as 'com.github.aaronshan.functions.array.UDFArrayIntersect';
+create temporary function array_max as 'com.github.aaronshan.functions.array.UDFArrayMax';
+create temporary function array_min as 'com.github.aaronshan.functions.array.UDFArrayMin';
+create temporary function array_join as 'com.github.aaronshan.functions.array.UDFArrayJoin';
+create temporary function array_distinct as 'com.github.aaronshan.functions.array.UDFArrayDistinct';
+create temporary function array_position as 'com.github.aaronshan.functions.array.UDFArrayPosition';
+create temporary function array_remove as 'com.github.aaronshan.functions.array.UDFArrayRemove';
+create temporary function array_reverse as 'com.github.aaronshan.functions.array.UDFArrayReverse';
+create temporary function array_sort as 'com.github.aaronshan.functions.array.UDFArraySort';
+create temporary function array_concat as 'com.github.aaronshan.functions.array.UDFArrayConcat';
+create temporary function array_value_count as 'com.github.aaronshan.functions.array.UDFArrayValueCount';
+create temporary function array_slice as 'com.github.aaronshan.functions.array.UDFArraySlice';
+create temporary function array_element_at as 'com.github.aaronshan.functions.array.UDFArrayElementAt';
+create temporary function bit_count as 'com.github.aaronshan.functions.bitwise.UDFBitCount';
+create temporary function bitwise_and as 'com.github.aaronshan.functions.bitwise.UDFBitwiseAnd';
+create temporary function array_shuffle as 'com.github.aaronshan.functions.array.UDFArrayShuffle';
+create temporary function sequence as 'com.github.aaronshan.functions.array.UDFSequence';
+create temporary function array_value_count as 'com.github.aaronshan.functions.array.UDFArrayValueCount';
+create temporary function bitwise_not as 'com.github.aaronshan.functions.bitwise.UDFBitwiseNot';
+create temporary function bitwise_or as 'com.github.aaronshan.functions.bitwise.UDFBitwiseOr';
+create temporary function bitwise_xor as 'com.github.aaronshan.functions.bitwise.UDFBitwiseXor';
+create temporary function map_build as 'com.github.aaronshan.functions.map.UDFMapBuild';
+create temporary function map_concat as 'com.github.aaronshan.functions.map.UDFMapConcat';
+create temporary function map_element_at as 'com.github.aaronshan.functions.map.UDFMapElementAt';
+create temporary function map_equals as 'com.github.aaronshan.functions.map.UDFMapEquals';
+create temporary function day_of_week as 'com.github.aaronshan.functions.date.UDFDayOfWeek';
+create temporary function day_of_year as 'com.github.aaronshan.functions.date.UDFDayOfYear';
+create temporary function type_of_day as 'com.github.aaronshan.functions.date.UDFTypeOfDay'; 
+create temporary function zodiac_cn as 'com.github.aaronshan.functions.date.UDFZodiacSignCn';
+create temporary function zodiac_en as 'com.github.aaronshan.functions.date.UDFZodiacSignEn';
+create temporary function pinyin as 'com.github.aaronshan.functions.string.UDFChineseToPinYin';
+create temporary function md5 as 'com.github.aaronshan.functions.string.UDFMd5';
+create temporary function sha256 as 'com.github.aaronshan.functions.string.UDFSha256';
+create temporary function codepoint as 'com.github.aaronshan.functions.string.UDFCodePoint';
+create temporary function hamming_distance as 'com.github.aaronshan.functions.string.UDFStringHammingDistance';
+create temporary function levenshtein_distance as 'com.github.aaronshan.functions.string.UDFStringLevenshteinDistance';
+create temporary function normalize as 'com.github.aaronshan.functions.string.UDFStringNormalize';
+create temporary function strpos as 'com.github.aaronshan.functions.string.UDFStringPosition';
+create temporary function split_to_map as 'com.github.aaronshan.functions.string.UDFStringSplitToMap';
+create temporary function split_to_multimap as 'com.github.aaronshan.functions.string.UDFStringSplitToMultimap';
+create temporary function json_array_get as 'com.github.aaronshan.functions.json.UDFJsonArrayGet';
+create temporary function json_array_length as 'com.github.aaronshan.functions.json.UDFJsonArrayLength';
+create temporary function json_array_extract as 'com.github.aaronshan.functions.json.UDFJsonArrayExtract';
+create temporary function json_array_extract_scalar as 'com.github.aaronshan.functions.json.UDFJsonArrayExtractScalar';
+create temporary function json_extract as 'com.github.aaronshan.functions.json.UDFJsonExtract';
+create temporary function json_extract_scalar as 'com.github.aaronshan.functions.json.UDFJsonExtractScalar';
+create temporary function json_size as 'com.github.aaronshan.functions.json.UDFJsonSize';
+create temporary function id_card_province as 'com.github.aaronshan.functions.card.UDFChinaIdCardProvince';
+create temporary function id_card_city as 'com.github.aaronshan.functions.card.UDFChinaIdCardCity';
+create temporary function id_card_area as 'com.github.aaronshan.functions.card.UDFChinaIdCardArea';
+create temporary function id_card_birthday as 'com.github.aaronshan.functions.card.UDFChinaIdCardBirthday';
+create temporary function id_card_gender as 'com.github.aaronshan.functions.card.UDFChinaIdCardGender';
+create temporary function is_valid_id_card as 'com.github.aaronshan.functions.card.UDFChinaIdCardValid';
+create temporary function id_card_info as 'com.github.aaronshan.functions.card.UDFChinaIdCardInfo';
+create temporary function wgs_distance as 'com.github.aaronshan.functions.geo.UDFGeoWgsDistance';
+create temporary function gcj_to_bd as 'com.github.aaronshan.functions.geo.UDFGeoGcjToBd';
+create temporary function bd_to_gcj as 'com.github.aaronshan.functions.geo.UDFGeoBdToGcj';
+create temporary function wgs_to_gcj as 'com.github.aaronshan.functions.geo.UDFGeoWgsToGcj';
+create temporary function gcj_to_wgs as 'com.github.aaronshan.functions.geo.UDFGeoGcjToWgs';
+create temporary function gcj_extract_wgs as 'com.github.aaronshan.functions.geo.UDFGeoGcjExtractWgs';
+create temporary function url_encode as 'com.github.aaronshan.functions.url.UDFUrlEncode';
+create temporary function url_decode as 'com.github.aaronshan.functions.url.UDFUrlDecode';
+create temporary function infinity as 'com.github.aaronshan.functions.math.UDFMathInfinity';
+create temporary function is_finite as 'com.github.aaronshan.functions.math.UDFMathIsFinite';
+create temporary function is_infinite as 'com.github.aaronshan.functions.math.UDFMathIsInfinite';
+create temporary function nan as 'com.github.aaronshan.functions.math.UDFMathNaN';
+create temporary function is_nan as 'com.github.aaronshan.functions.math.UDFMathIsNaN';
+create temporary function from_base as 'com.github.aaronshan.functions.math.UDFMathFromBase';
+create temporary function to_base as 'com.github.aaronshan.functions.math.UDFMathToBase';
+create temporary function cosine_similarity as 'com.github.aaronshan.functions.math.UDFMathCosineSimilarity';
+create temporary function normal_cdf as 'com.github.aaronshan.functions.math.UDFMathNormalCdf';
+create temporary function inverse_normal_cdf as 'com.github.aaronshan.functions.math.UDFMathInverseNormalCdf';
+create temporary function regexp_extract as 'com.github.aaronshan.functions.regexp.UDFRe2JRegexpExtract';
+create temporary function regexp_extract_all as 'com.github.aaronshan.functions.regexp.UDFRe2JRegexpExtractAll';
+create temporary function regexp_like as 'com.github.aaronshan.functions.regexp.UDFRe2JRegexpLike';
+create temporary function regexp_replace as 'com.github.aaronshan.functions.regexp.UDFRe2JRegexpReplace';
+create temporary function regexp_split as 'com.github.aaronshan.functions.regexp.UDFRe2JRegexpSplit';
 ```
 
 You can use these statements on hive cli env get detail of function.
@@ -257,6 +327,11 @@ select array_concat(array(16,12,18,9,null), array(14,9,6,18,null)) => [16,12,18,
 select array_value_count(array(16,13,12,13,18,16,9,18), 13) => 2
 select array_slice(array(16,13,12,13,18,16,9,18), -2, 3) => [9,18]
 select array_element_at(array(16,13,12,13,18,16,9,18), -1) => 18
+select array_shuffle(array(16,12,18,9))
+select sequence(1, 5) => [1, 2, 3, 4, 5]
+select sequence(5, 1) => [5, 4, 3, 2, 1]
+select sequence(1, 9, 4) => [1, 5, 9]
+select sequence('2016-04-12 00:00:00', '2016-04-14 00:00:00', 24*3600*1000) => ['2016-04-12 00:00:00', '2016-04-13 00:00:00', '2016-04-14 00:00:00']
 ```
 
 ```
@@ -302,3 +377,7 @@ select gcj_extract_wgs(39.915, 116.404) => {"lng":116.39775549316407,"lat":39.91
 ```
 select url_encode('http://shanruifeng.cc/') => http%3A%2F%2Fshanruifeng.cc%2F
 ```
+
+```
+select cosine_similarity(map_build(array['a'], array[1.0]), map_build(array['a'], array[2.0])); => 1.0
+```
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index fdebeb0..95f9a63 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,9 +4,14 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>cc.shanruifeng</groupId>
+    <groupId>com.github.aaronshan</groupId>
     <artifactId>hive-third-functions</artifactId>
-    <version>2.1.3</version>
+    <version>2.2.0</version>
+
+    <scm>
+        <url>https://github.com/aaronshan</url>
+        <connection>https://github.com/aaronshan/hive-third-functions.git</connection>
+    </scm>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -21,9 +26,10 @@
         <guava.version>18.0</guava.version>
         <commons-codec.version>1.10</commons-codec.version>
         <dep.airlift.version>0.131</dep.airlift.version>
-        <dep.jackson.version>2.4.4</dep.jackson.version>
+        <dep.jackson.version>2.9.0</dep.jackson.version>
         <dep.jmh.version>1.9.3</dep.jmh.version>
         <junit.version>4.12</junit.version>
+        <lambda.from.string.version>1.6</lambda.from.string.version>
     </properties>
 
     <dependencyManagement>
@@ -70,6 +76,12 @@
                 <version>${dep.airlift.version}</version>
             </dependency>
 
+            <dependency>
+                <groupId>io.airlift</groupId>
+                <artifactId>slice</artifactId>
+                <version>0.35</version>
+            </dependency>
+
             <dependency>
                 <groupId>com.fasterxml.jackson.core</groupId>
                 <artifactId>jackson-core</artifactId>
@@ -82,11 +94,48 @@
                 <version>${dep.jackson.version}</version>
             </dependency>
 
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-annotations</artifactId>
+                <version>${dep.jackson.version}</version>
+            </dependency>
+
             <dependency>
                 <groupId>junit</groupId>
                 <artifactId>junit</artifactId>
                 <version>${junit.version}</version>
             </dependency>
+
+            <dependency>
+                <groupId>pl.joegreen</groupId>
+                <artifactId>lambda-from-string</artifactId>
+                <version>${lambda.from.string.version}</version>
+            </dependency>
+
+            <dependency>
+                <groupId>org.apache.commons</groupId>
+                <artifactId>commons-math3</artifactId>
+                <version>3.6.1</version>
+            </dependency>
+
+            <dependency>
+                <groupId>com.teradata</groupId>
+                <artifactId>re2j-td</artifactId>
+                <version>1.4</version>
+            </dependency>
+
+            <dependency>
+                <groupId>org.apache.lucene</groupId>
+                <artifactId>lucene-analyzers-common</artifactId>
+                <version>7.2.1</version>
+                <exclusions>
+                    <exclusion>
+                        <groupId>org.apache.lucene</groupId>
+                        <artifactId>lucene-core</artifactId>
+                    </exclusion>
+                </exclusions>
+            </dependency>
+
         </dependencies>
     </dependencyManagement>
 
@@ -128,6 +177,11 @@
             <artifactId>json</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>io.airlift</groupId>
+            <artifactId>slice</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-core</artifactId>
@@ -138,6 +192,26 @@
             <artifactId>jackson-databind</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>pl.joegreen</groupId>
+            <artifactId>lambda-from-string</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.teradata</groupId>
+            <artifactId>re2j-td</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.lucene</groupId>
+            <artifactId>lucene-analyzers-common</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
@@ -194,5 +268,65 @@
             </plugin>
         </plugins>
     </build>
+
+    <developers>
+        <developer>
+            <name>aaronshan</name>
+            <id>aaronshan</id>
+            <email>shanruifeng@gmail.com</email>
+            <roles>
+                <role>Developer</role>
+            </roles>
+            <timezone>+8</timezone>
+        </developer>
+    </developers>
+
+    <profiles>
+        <profile>
+            <id>release</id> <!-- 部署要用到 -->
+            <build>
+                <plugins>
+                    <!-- Source -->
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-source-plugin</artifactId>
+                        <version>2.2.1</version>
+                        <executions>
+                            <execution>
+                                <phase>package</phase>
+                                <goals>
+                                    <goal>jar-no-fork</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                    <!-- GPG -->
+                    <plugin> <!-- 进行延签 -->
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-gpg-plugin</artifactId>
+                        <version>1.6</version>
+                        <executions>
+                            <execution>
+                                <phase>verify</phase>
+                                <goals>
+                                    <goal>sign</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+            <distributionManagement>
+                <snapshotRepository>
+                    <id>oss</id>
+                    <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
+                </snapshotRepository>
+                <repository>
+                    <id>oss</id>
+                    <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+                </repository>
+            </distributionManagement>
+        </profile>
+    </profiles>
     
 </project>
\ No newline at end of file
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayConcat.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayConcat.java
similarity index 99%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayConcat.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayConcat.java
index b5e689a..47c53ec 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayConcat.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayConcat.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import java.util.ArrayList;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayContains.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayContains.java
similarity index 99%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayContains.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayContains.java
index 6a48726..9b6177d 100755
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayContains.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayContains.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayDistinct.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayDistinct.java
similarity index 95%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayDistinct.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayDistinct.java
index 51b718b..ca230bd 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayDistinct.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayDistinct.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
-import cc.shanruifeng.functions.fastuitl.ints.IntArrays;
+import com.github.aaronshan.functions.fastuitl.ints.IntArrays;
 import java.util.ArrayList;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
@@ -10,7 +10,7 @@
 import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
 import org.apache.hadoop.hive.serde2.objectinspector.*;
 
-import static cc.shanruifeng.functions.utils.ArrayUtils.IntArrayCompare;
+import static com.github.aaronshan.functions.utils.ArrayUtils.IntArrayCompare;
 
 /**
  * @author ruifeng.shan
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayElementAt.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayElementAt.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayElementAt.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayElementAt.java
index bd4009b..5524708 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayElementAt.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayElementAt.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayEquals.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayEquals.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayEquals.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayEquals.java
index f9811d7..9bc41bf 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayEquals.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayEquals.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
-import cc.shanruifeng.functions.utils.ArrayUtils;
+import com.github.aaronshan.functions.utils.ArrayUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayIntersect.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayIntersect.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayIntersect.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayIntersect.java
index 1991a82..b4cd0f7 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayIntersect.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayIntersect.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
-import cc.shanruifeng.functions.fastuitl.ints.IntArrays;
+import com.github.aaronshan.functions.fastuitl.ints.IntArrays;
 import java.util.ArrayList;
 import java.util.Arrays;
 
@@ -13,7 +13,7 @@
 import org.apache.hadoop.hive.serde2.objectinspector.*;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorConverters.Converter;
 
-import static cc.shanruifeng.functions.utils.ArrayUtils.IntArrayCompare;
+import static com.github.aaronshan.functions.utils.ArrayUtils.IntArrayCompare;
 
 /**
  * @author ruifeng.shan
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayJoin.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayJoin.java
similarity index 99%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayJoin.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayJoin.java
index 9321286..dc370cb 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayJoin.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayJoin.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayMax.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayMax.java
similarity index 94%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayMax.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayMax.java
index f2101f5..c4d5da9 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayMax.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayMax.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
-import cc.shanruifeng.functions.fastuitl.ints.IntArrays;
+import com.github.aaronshan.functions.fastuitl.ints.IntArrays;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
@@ -11,7 +11,7 @@
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
 
-import static cc.shanruifeng.functions.utils.ArrayUtils.IntArrayCompare;
+import static com.github.aaronshan.functions.utils.ArrayUtils.IntArrayCompare;
 
 /**
  * @author ruifeng.shan
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayMin.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayMin.java
similarity index 94%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayMin.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayMin.java
index 992b090..a8d022b 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayMin.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayMin.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
-import cc.shanruifeng.functions.fastuitl.ints.IntArrays;
+import com.github.aaronshan.functions.fastuitl.ints.IntArrays;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
@@ -11,7 +11,7 @@
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
 
-import static cc.shanruifeng.functions.utils.ArrayUtils.IntArrayCompare;
+import static com.github.aaronshan.functions.utils.ArrayUtils.IntArrayCompare;
 
 /**
  * @author ruifeng.shan
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayPosition.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayPosition.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayPosition.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayPosition.java
index f916cb3..89d293c 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayPosition.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayPosition.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayRemove.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayRemove.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayRemove.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayRemove.java
index af1f303..fac4613 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayRemove.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayRemove.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import java.util.ArrayList;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayReverse.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayReverse.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayReverse.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayReverse.java
index e449e34..f9874a7 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayReverse.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayReverse.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import java.util.ArrayList;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/com/github/aaronshan/functions/array/UDFArrayShuffle.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayShuffle.java
new file mode 100644
index 0000000..460b9ca
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayShuffle.java
@@ -0,0 +1,113 @@
+package com.github.aaronshan.functions.array;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.objectinspector.*;
+
+import java.util.ArrayList;
+import java.util.Random;
+
+/**
+ * @author aaron02
+ * @date 2018-08-18 上午8:52
+ */
+@Description(name = "array_shuffle"
+        , value = "_FUNC_(array<E>) - Generates a random permutation of the given array."
+        , extended = "Example:\n > select _FUNC_(array) from src;")
+public class UDFArrayShuffle extends GenericUDF {
+    private static final int ARG_COUNT = 1; // Number of arguments to this UDF
+    private transient ListObjectInspector arrayOI;
+    private transient ObjectInspector arrayElementOI;
+
+    private transient ObjectInspectorConverters.Converter converter;
+    private transient ArrayList<Object> result = new ArrayList<Object>();
+
+    private static final int INITIAL_LENGTH = 128;
+    private int[] positions = new int[INITIAL_LENGTH];
+
+    public UDFArrayShuffle() {
+    }
+
+    @Override
+    public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
+        // Check if two arguments were passed
+        if (arguments.length != ARG_COUNT) {
+            throw new UDFArgumentLengthException(
+                    "The function array_shuffle(array) takes exactly " + ARG_COUNT + " arguments.");
+        }
+
+        // Check if two argument is of category LIST
+        if (!arguments[0].getCategory().equals(ObjectInspector.Category.LIST)) {
+            throw new UDFArgumentTypeException(0,
+                    "\"" + org.apache.hadoop.hive.serde.serdeConstants.LIST_TYPE_NAME + "\" "
+                            + "expected at function array_shuffle, but "
+                            + "\"" + arguments[0].getTypeName() + "\" "
+                            + "is found");
+        }
+
+        arrayOI = (ListObjectInspector) arguments[0];
+        arrayElementOI = arrayOI.getListElementObjectInspector();
+
+        // Check if the comparison is supported for this type
+        if (!ObjectInspectorUtils.compareSupported(arrayElementOI)) {
+            throw new UDFArgumentException("The function array_shuffle"
+                    + " does not support comparison for "
+                    + "\"" + arrayElementOI.getTypeName() + "\""
+                    + " types");
+        }
+
+        converter = ObjectInspectorConverters.getConverter(arrayElementOI, arrayElementOI);
+
+        return ObjectInspectorFactory.getStandardListObjectInspector(arrayElementOI);
+    }
+
+    @Override
+    public Object evaluate(GenericUDF.DeferredObject[] arguments) throws HiveException {
+        Object array = arguments[0].get();
+        int arrayLength = arrayOI.getListLength(array);
+
+        // Check if array is null or empty
+        if (array == null || arrayLength <= 0) {
+            return null;
+        }
+
+        if (arrayLength == 1) {
+            return array;
+        }
+
+        result.clear();
+
+        if (positions.length < arrayLength) {
+            positions = new int[arrayLength];
+        }
+        for (int i = 0; i < arrayLength; i++) {
+            positions[i] = i;
+        }
+
+        // Fisher-Yates shuffle
+        // Randomly swap a pair of positions
+        for (int i = arrayLength - 1; i > 0; i--) {
+            Random random = new Random();
+            int index = random.nextInt(i + 1);
+            int swap = positions[i];
+            positions[i] = positions[index];
+            positions[index] = swap;
+        }
+
+        for (int i = 0; i < arrayLength; i++) {
+            Object arrayElement = arrayOI.getListElement(array, positions[i]);
+            result.add(arrayElement);
+        }
+        return result;
+    }
+
+    @Override
+    public String getDisplayString(String[] strings) {
+        assert (strings.length == ARG_COUNT);
+        return "array_shuffle(" + strings[0] + ")";
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArraySlice.java b/src/main/java/com/github/aaronshan/functions/array/UDFArraySlice.java
similarity index 99%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArraySlice.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArraySlice.java
index 4f1feb2..0bed6e5 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArraySlice.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArraySlice.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import java.util.ArrayList;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArraySort.java b/src/main/java/com/github/aaronshan/functions/array/UDFArraySort.java
similarity index 91%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArraySort.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArraySort.java
index 3a0313f..7378a16 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArraySort.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArraySort.java
@@ -1,7 +1,9 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
-import cc.shanruifeng.functions.fastuitl.ints.IntArrays;
+import com.github.aaronshan.functions.fastuitl.ints.IntArrays;
 import java.util.ArrayList;
+
+import com.github.aaronshan.functions.utils.ArrayUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
@@ -10,7 +12,7 @@
 import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
 import org.apache.hadoop.hive.serde2.objectinspector.*;
 
-import static cc.shanruifeng.functions.utils.ArrayUtils.IntArrayCompare;
+import static com.github.aaronshan.functions.utils.ArrayUtils.IntArrayCompare;
 
 /**
  * @author ruifeng.shan
@@ -88,7 +90,7 @@ public Object evaluate(DeferredObject[] arguments) throws HiveException {
             positions[i] = i;
         }
 
-        IntArrays.quickSort(positions, 0, arrayLength, IntArrayCompare(array, arrayOI));
+        IntArrays.quickSort(positions, 0, arrayLength, ArrayUtils.IntArrayCompare(array, arrayOI));
 
         result.clear();
         for (int i = 0; i < arrayLength; i++) {
diff --git a/src/main/java/cc/shanruifeng/functions/array/UDFArrayValueCount.java b/src/main/java/com/github/aaronshan/functions/array/UDFArrayValueCount.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/array/UDFArrayValueCount.java
rename to src/main/java/com/github/aaronshan/functions/array/UDFArrayValueCount.java
index 4984e15..3b1c643 100644
--- a/src/main/java/cc/shanruifeng/functions/array/UDFArrayValueCount.java
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFArrayValueCount.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
@@ -67,7 +67,7 @@ public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumen
 
         // Check if the comparison is supported for this type
         if (!ObjectInspectorUtils.compareSupported(valueOI)) {
-            throw new UDFArgumentException("The function array_contains"
+            throw new UDFArgumentException("The function array_value_count"
                     + " does not support comparison for "
                     + "\"" + valueOI.getTypeName() + "\""
                     + " types");
diff --git a/src/main/java/com/github/aaronshan/functions/array/UDFSequence.java b/src/main/java/com/github/aaronshan/functions/array/UDFSequence.java
new file mode 100644
index 0000000..cf1c975
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/array/UDFSequence.java
@@ -0,0 +1,92 @@
+package com.github.aaronshan.functions.array;
+
+import com.google.common.collect.Lists;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.joda.time.DateTime;
+import org.joda.time.format.DateTimeFormat;
+import org.joda.time.format.DateTimeFormatter;
+
+import java.util.List;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+/**
+ * @author aaron02
+ * @date 2018-08-18 上午9:23
+ */
+@Description(name = "sequence"
+        , value = "_FUNC_(start, stop) - Generate a sequence of integers from start to stop.\n" +
+        "_FUNC_(start, stop, step) - Generate a sequence of integers from start to stop, incrementing by step."
+        , extended = "Example:\n > select _FUNC_(1, 5) from src;\n > select _FUNC_(1, 9, 4) from src;\n" +
+        " > select _FUNC_('2016-04-12', '2016-04-14') from src;")
+public class UDFSequence extends UDF {
+    public final static DateTimeFormatter DEFAULT_DATE_FORMATTER = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");
+    private static final long MAX_RESULT_ENTRIES = 10000;
+
+    public UDFSequence() {
+
+    }
+
+    public Object evaluate(LongWritable start, LongWritable stop) throws HiveException {
+        return fixedWidthSequence(start.get(), stop.get(), stop.get() >= start.get() ? 1 : -1, Long.class);
+    }
+
+    public Object evaluate(LongWritable start, LongWritable stop, LongWritable step) throws HiveException {
+        return fixedWidthSequence(start.get(), stop.get(), step.get(), Long.class);
+    }
+
+    public Object evaluate(Text start, Text stop, long step) throws HiveException {
+        long startMillis = DateTime.parse(start.toString(), DEFAULT_DATE_FORMATTER).getMillis();
+        long stopMillis = DateTime.parse(stop.toString(), DEFAULT_DATE_FORMATTER).getMillis();
+        return fixedWidthSequence(startMillis, stopMillis, step, String.class);
+    }
+
+    public static int toIntExact(long value) {
+        if ((int)value != value) {
+            throw new ArithmeticException("integer overflow");
+        }
+        return (int)value;
+    }
+
+    private static Object fixedWidthSequence(long start, long stop, long step, Class type) throws HiveException {
+        checkValidStep(start, stop, step);
+
+        int length = toIntExact((stop - start) / step + 1L);
+        checkMaxEntry(length);
+
+        if (type == long.class || type == Long.class) {
+            List<Long> result = Lists.newArrayList();
+            for (long i = 0, value = start; i < length; ++i, value += step) {
+                result.add(value);
+            }
+            return result;
+        } else if (type == String.class){
+            List<String> result = Lists.newArrayList();
+            for (long i = 0, value = start; i < length; ++i, value += step) {
+                DateTime dateTime = new DateTime(value);
+                result.add(dateTime.toString(DEFAULT_DATE_FORMATTER));
+            }
+            return result;
+        } else {
+            throw new HiveException("Don't support this class type!" + type);
+        }
+    }
+
+    private static void checkValidStep(long start, long stop, long step) throws HiveException {
+        checkCondition(
+                step != 0,
+                "step must not be zero");
+        checkCondition(
+                step > 0 ? stop >= start : stop <= start,
+                "sequence stop value should be greater than or equal to start value if step is greater than zero otherwise stop should be less than or equal to start");
+    }
+
+    private static void checkMaxEntry(int length) throws HiveException {
+        checkCondition(
+                length <= MAX_RESULT_ENTRIES,
+                "result of sequence function must not have more than 10000 entries");
+    }
+}
diff --git a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitCount.java b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitCount.java
similarity index 96%
rename from src/main/java/cc/shanruifeng/functions/bitwise/UDFBitCount.java
rename to src/main/java/com/github/aaronshan/functions/bitwise/UDFBitCount.java
index b4dbb84..bb39515 100644
--- a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitCount.java
+++ b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitCount.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.bitwise;
+package com.github.aaronshan.functions.bitwise;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseAnd.java b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseAnd.java
similarity index 92%
rename from src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseAnd.java
rename to src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseAnd.java
index 3df2ce1..acfc013 100644
--- a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseAnd.java
+++ b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseAnd.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.bitwise;
+package com.github.aaronshan.functions.bitwise;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseNot.java b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseNot.java
similarity index 92%
rename from src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseNot.java
rename to src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseNot.java
index a23d238..b50d4b5 100644
--- a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseNot.java
+++ b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseNot.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.bitwise;
+package com.github.aaronshan.functions.bitwise;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseOr.java b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseOr.java
similarity index 92%
rename from src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseOr.java
rename to src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseOr.java
index f7fdc8c..8a9bc75 100644
--- a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseOr.java
+++ b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseOr.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.bitwise;
+package com.github.aaronshan.functions.bitwise;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseXor.java b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseXor.java
similarity index 92%
rename from src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseXor.java
rename to src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseXor.java
index 977c03a..1693c4e 100644
--- a/src/main/java/cc/shanruifeng/functions/bitwise/UDFBitwiseXor.java
+++ b/src/main/java/com/github/aaronshan/functions/bitwise/UDFBitwiseXor.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.bitwise;
+package com.github.aaronshan.functions.bitwise;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardArea.java b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardArea.java
similarity index 87%
rename from src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardArea.java
rename to src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardArea.java
index d47e1dc..902dc81 100644
--- a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardArea.java
+++ b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardArea.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.card;
+package com.github.aaronshan.functions.card;
 
-import cc.shanruifeng.functions.utils.CardUtils;
+import com.github.aaronshan.functions.utils.CardUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardBirthday.java b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardBirthday.java
similarity index 87%
rename from src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardBirthday.java
rename to src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardBirthday.java
index 56d274a..ea43b27 100644
--- a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardBirthday.java
+++ b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardBirthday.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.card;
+package com.github.aaronshan.functions.card;
 
-import cc.shanruifeng.functions.utils.CardUtils;
+import com.github.aaronshan.functions.utils.CardUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardCity.java b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardCity.java
similarity index 87%
rename from src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardCity.java
rename to src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardCity.java
index 807fa6a..31cc99a 100644
--- a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardCity.java
+++ b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardCity.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.card;
+package com.github.aaronshan.functions.card;
 
-import cc.shanruifeng.functions.utils.CardUtils;
+import com.github.aaronshan.functions.utils.CardUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardGender.java b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardGender.java
similarity index 87%
rename from src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardGender.java
rename to src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardGender.java
index cba80c9..06d7686 100644
--- a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardGender.java
+++ b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardGender.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.card;
+package com.github.aaronshan.functions.card;
 
-import cc.shanruifeng.functions.utils.CardUtils;
+import com.github.aaronshan.functions.utils.CardUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardInfo.java b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardInfo.java
similarity index 87%
rename from src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardInfo.java
rename to src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardInfo.java
index 209a941..5a79b4a 100644
--- a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardInfo.java
+++ b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardInfo.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.card;
+package com.github.aaronshan.functions.card;
 
-import cc.shanruifeng.functions.utils.CardUtils;
+import com.github.aaronshan.functions.utils.CardUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardProvince.java b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardProvince.java
similarity index 87%
rename from src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardProvince.java
rename to src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardProvince.java
index a6fea25..5ffaa55 100644
--- a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardProvince.java
+++ b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardProvince.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.card;
+package com.github.aaronshan.functions.card;
 
-import cc.shanruifeng.functions.utils.CardUtils;
+import com.github.aaronshan.functions.utils.CardUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardValid.java b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardValid.java
similarity index 88%
rename from src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardValid.java
rename to src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardValid.java
index 239a094..f6d9d77 100644
--- a/src/main/java/cc/shanruifeng/functions/card/UDFChinaIdCardValid.java
+++ b/src/main/java/com/github/aaronshan/functions/card/UDFChinaIdCardValid.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.card;
+package com.github.aaronshan.functions.card;
 
-import cc.shanruifeng.functions.utils.CardUtils;
+import com.github.aaronshan.functions.utils.CardUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.BooleanWritable;
diff --git a/src/main/java/cc/shanruifeng/functions/date/UDFDayOfWeek.java b/src/main/java/com/github/aaronshan/functions/date/UDFDayOfWeek.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/date/UDFDayOfWeek.java
rename to src/main/java/com/github/aaronshan/functions/date/UDFDayOfWeek.java
index 982e776..a7034f4 100755
--- a/src/main/java/cc/shanruifeng/functions/date/UDFDayOfWeek.java
+++ b/src/main/java/com/github/aaronshan/functions/date/UDFDayOfWeek.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.date;
+package com.github.aaronshan.functions.date;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/date/UDFDayOfYear.java b/src/main/java/com/github/aaronshan/functions/date/UDFDayOfYear.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/date/UDFDayOfYear.java
rename to src/main/java/com/github/aaronshan/functions/date/UDFDayOfYear.java
index d446f7b..f482355 100644
--- a/src/main/java/cc/shanruifeng/functions/date/UDFDayOfYear.java
+++ b/src/main/java/com/github/aaronshan/functions/date/UDFDayOfYear.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.date;
+package com.github.aaronshan.functions.date;
 
 import java.util.Calendar;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/date/UDFTypeOfDay.java b/src/main/java/com/github/aaronshan/functions/date/UDFTypeOfDay.java
similarity index 96%
rename from src/main/java/cc/shanruifeng/functions/date/UDFTypeOfDay.java
rename to src/main/java/com/github/aaronshan/functions/date/UDFTypeOfDay.java
index 9fde811..6dc6851 100755
--- a/src/main/java/cc/shanruifeng/functions/date/UDFTypeOfDay.java
+++ b/src/main/java/com/github/aaronshan/functions/date/UDFTypeOfDay.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.date;
+package com.github.aaronshan.functions.date;
 
-import cc.shanruifeng.functions.utils.ConfigUtils;
+import com.github.aaronshan.functions.utils.ConfigUtils;
 import java.util.Calendar;
 import java.util.Map;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/date/UDFZodiacSignCn.java b/src/main/java/com/github/aaronshan/functions/date/UDFZodiacSignCn.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/date/UDFZodiacSignCn.java
rename to src/main/java/com/github/aaronshan/functions/date/UDFZodiacSignCn.java
index 7a5bdd2..fecee21 100644
--- a/src/main/java/cc/shanruifeng/functions/date/UDFZodiacSignCn.java
+++ b/src/main/java/com/github/aaronshan/functions/date/UDFZodiacSignCn.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.date;
+package com.github.aaronshan.functions.date;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/date/UDFZodiacSignEn.java b/src/main/java/com/github/aaronshan/functions/date/UDFZodiacSignEn.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/date/UDFZodiacSignEn.java
rename to src/main/java/com/github/aaronshan/functions/date/UDFZodiacSignEn.java
index 64281bd..db2a0c2 100644
--- a/src/main/java/cc/shanruifeng/functions/date/UDFZodiacSignEn.java
+++ b/src/main/java/com/github/aaronshan/functions/date/UDFZodiacSignEn.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.date;
+package com.github.aaronshan.functions.date;
 
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
diff --git a/src/main/java/cc/shanruifeng/functions/fastuitl/ints/AbstractIntComparator.java b/src/main/java/com/github/aaronshan/functions/fastuitl/ints/AbstractIntComparator.java
similarity index 88%
rename from src/main/java/cc/shanruifeng/functions/fastuitl/ints/AbstractIntComparator.java
rename to src/main/java/com/github/aaronshan/functions/fastuitl/ints/AbstractIntComparator.java
index 3c83a45..972ae97 100644
--- a/src/main/java/cc/shanruifeng/functions/fastuitl/ints/AbstractIntComparator.java
+++ b/src/main/java/com/github/aaronshan/functions/fastuitl/ints/AbstractIntComparator.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.fastuitl.ints;
+package com.github.aaronshan.functions.fastuitl.ints;
 
 // Note: this code was forked from fastutil (http://fastutil.di.unimi.it/)
 // Copyright (C) 2010-2013 Sebastiano Vigna
diff --git a/src/main/java/cc/shanruifeng/functions/fastuitl/ints/IntArrays.java b/src/main/java/com/github/aaronshan/functions/fastuitl/ints/IntArrays.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/fastuitl/ints/IntArrays.java
rename to src/main/java/com/github/aaronshan/functions/fastuitl/ints/IntArrays.java
index 833ed56..9341566 100644
--- a/src/main/java/cc/shanruifeng/functions/fastuitl/ints/IntArrays.java
+++ b/src/main/java/com/github/aaronshan/functions/fastuitl/ints/IntArrays.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.fastuitl.ints;
+package com.github.aaronshan.functions.fastuitl.ints;
 
 // Note: this code was forked from fastutil (http://fastutil.di.unimi.it/)
 // Copyright (C) 2010-2013 Sebastiano Vigna
diff --git a/src/main/java/cc/shanruifeng/functions/fastuitl/ints/IntComparator.java b/src/main/java/com/github/aaronshan/functions/fastuitl/ints/IntComparator.java
similarity index 82%
rename from src/main/java/cc/shanruifeng/functions/fastuitl/ints/IntComparator.java
rename to src/main/java/com/github/aaronshan/functions/fastuitl/ints/IntComparator.java
index 37eba9f..67f9d03 100644
--- a/src/main/java/cc/shanruifeng/functions/fastuitl/ints/IntComparator.java
+++ b/src/main/java/com/github/aaronshan/functions/fastuitl/ints/IntComparator.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.fastuitl.ints;
+package com.github.aaronshan.functions.fastuitl.ints;
 
 import java.util.Comparator;
 
diff --git a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoBdToGcj.java b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoBdToGcj.java
similarity index 85%
rename from src/main/java/cc/shanruifeng/functions/geo/UDFGeoBdToGcj.java
rename to src/main/java/com/github/aaronshan/functions/geo/UDFGeoBdToGcj.java
index de9d05a..07b6323 100644
--- a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoBdToGcj.java
+++ b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoBdToGcj.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.geo;
+package com.github.aaronshan.functions.geo;
 
-import cc.shanruifeng.functions.utils.GeoUtils;
+import com.github.aaronshan.functions.utils.GeoUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjExtractWgs.java b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjExtractWgs.java
similarity index 85%
rename from src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjExtractWgs.java
rename to src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjExtractWgs.java
index 34dca23..4d0fee4 100644
--- a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjExtractWgs.java
+++ b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjExtractWgs.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.geo;
+package com.github.aaronshan.functions.geo;
 
-import cc.shanruifeng.functions.utils.GeoUtils;
+import com.github.aaronshan.functions.utils.GeoUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.io.Text;
 
diff --git a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjToBd.java b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjToBd.java
similarity index 84%
rename from src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjToBd.java
rename to src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjToBd.java
index a1c422a..e2eee04 100644
--- a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjToBd.java
+++ b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjToBd.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.geo;
+package com.github.aaronshan.functions.geo;
 
-import cc.shanruifeng.functions.utils.GeoUtils;
+import com.github.aaronshan.functions.utils.GeoUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.io.Text;
 
diff --git a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjToWgs.java b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjToWgs.java
similarity index 84%
rename from src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjToWgs.java
rename to src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjToWgs.java
index 10278ae..e019a49 100644
--- a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoGcjToWgs.java
+++ b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoGcjToWgs.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.geo;
+package com.github.aaronshan.functions.geo;
 
-import cc.shanruifeng.functions.utils.GeoUtils;
+import com.github.aaronshan.functions.utils.GeoUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.io.Text;
 
diff --git a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoWgsDistance.java b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoWgsDistance.java
similarity index 86%
rename from src/main/java/cc/shanruifeng/functions/geo/UDFGeoWgsDistance.java
rename to src/main/java/com/github/aaronshan/functions/geo/UDFGeoWgsDistance.java
index 000bb3b..0ed7237 100644
--- a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoWgsDistance.java
+++ b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoWgsDistance.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.geo;
+package com.github.aaronshan.functions.geo;
 
-import cc.shanruifeng.functions.utils.GeoUtils;
+import com.github.aaronshan.functions.utils.GeoUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.serde2.io.DoubleWritable;
 
diff --git a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoWgsToGcj.java b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoWgsToGcj.java
similarity index 84%
rename from src/main/java/cc/shanruifeng/functions/geo/UDFGeoWgsToGcj.java
rename to src/main/java/com/github/aaronshan/functions/geo/UDFGeoWgsToGcj.java
index 1081356..f2e4eb3 100644
--- a/src/main/java/cc/shanruifeng/functions/geo/UDFGeoWgsToGcj.java
+++ b/src/main/java/com/github/aaronshan/functions/geo/UDFGeoWgsToGcj.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.geo;
+package com.github.aaronshan.functions.geo;
 
-import cc.shanruifeng.functions.utils.GeoUtils;
+import com.github.aaronshan.functions.utils.GeoUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.io.Text;
 
diff --git a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayExtract.java b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayExtract.java
similarity index 93%
rename from src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayExtract.java
rename to src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayExtract.java
index 266245f..f2ca590 100644
--- a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayExtract.java
+++ b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayExtract.java
@@ -1,8 +1,8 @@
-package cc.shanruifeng.functions.json;
+package com.github.aaronshan.functions.json;
 
-import cc.shanruifeng.functions.utils.json.JsonExtract;
-import cc.shanruifeng.functions.utils.json.JsonPath;
-import cc.shanruifeng.functions.utils.json.JsonUtils;
+import com.github.aaronshan.functions.utils.json.JsonExtract;
+import com.github.aaronshan.functions.utils.json.JsonPath;
+import com.github.aaronshan.functions.utils.json.JsonUtils;
 import java.util.ArrayList;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayExtractScalar.java b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayExtractScalar.java
similarity index 93%
rename from src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayExtractScalar.java
rename to src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayExtractScalar.java
index 713bee0..bf82984 100644
--- a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayExtractScalar.java
+++ b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayExtractScalar.java
@@ -1,8 +1,8 @@
-package cc.shanruifeng.functions.json;
+package com.github.aaronshan.functions.json;
 
-import cc.shanruifeng.functions.utils.json.JsonExtract;
-import cc.shanruifeng.functions.utils.json.JsonPath;
-import cc.shanruifeng.functions.utils.json.JsonUtils;
+import com.github.aaronshan.functions.utils.json.JsonExtract;
+import com.github.aaronshan.functions.utils.json.JsonPath;
+import com.github.aaronshan.functions.utils.json.JsonUtils;
 import java.util.ArrayList;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayGet.java b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayGet.java
similarity index 88%
rename from src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayGet.java
rename to src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayGet.java
index 8987b82..2c1eb91 100644
--- a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayGet.java
+++ b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayGet.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.json;
+package com.github.aaronshan.functions.json;
 
-import cc.shanruifeng.functions.utils.json.JsonUtils;
+import com.github.aaronshan.functions.utils.json.JsonUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayLength.java b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayLength.java
similarity index 89%
rename from src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayLength.java
rename to src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayLength.java
index 4bfa91b..284b368 100644
--- a/src/main/java/cc/shanruifeng/functions/json/UDFJsonArrayLength.java
+++ b/src/main/java/com/github/aaronshan/functions/json/UDFJsonArrayLength.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.json;
+package com.github.aaronshan.functions.json;
 
-import cc.shanruifeng.functions.utils.json.JsonUtils;
+import com.github.aaronshan.functions.utils.json.JsonUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.LongWritable;
diff --git a/src/main/java/cc/shanruifeng/functions/json/UDFJsonExtract.java b/src/main/java/com/github/aaronshan/functions/json/UDFJsonExtract.java
similarity index 84%
rename from src/main/java/cc/shanruifeng/functions/json/UDFJsonExtract.java
rename to src/main/java/com/github/aaronshan/functions/json/UDFJsonExtract.java
index 3f57c7e..6be5cf8 100644
--- a/src/main/java/cc/shanruifeng/functions/json/UDFJsonExtract.java
+++ b/src/main/java/com/github/aaronshan/functions/json/UDFJsonExtract.java
@@ -1,7 +1,7 @@
-package cc.shanruifeng.functions.json;
+package com.github.aaronshan.functions.json;
 
-import cc.shanruifeng.functions.utils.json.JsonExtract;
-import cc.shanruifeng.functions.utils.json.JsonPath;
+import com.github.aaronshan.functions.utils.json.JsonExtract;
+import com.github.aaronshan.functions.utils.json.JsonPath;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/json/UDFJsonExtractScalar.java b/src/main/java/com/github/aaronshan/functions/json/UDFJsonExtractScalar.java
similarity index 85%
rename from src/main/java/cc/shanruifeng/functions/json/UDFJsonExtractScalar.java
rename to src/main/java/com/github/aaronshan/functions/json/UDFJsonExtractScalar.java
index 6af6884..ab51588 100644
--- a/src/main/java/cc/shanruifeng/functions/json/UDFJsonExtractScalar.java
+++ b/src/main/java/com/github/aaronshan/functions/json/UDFJsonExtractScalar.java
@@ -1,7 +1,7 @@
-package cc.shanruifeng.functions.json;
+package com.github.aaronshan.functions.json;
 
-import cc.shanruifeng.functions.utils.json.JsonExtract;
-import cc.shanruifeng.functions.utils.json.JsonPath;
+import com.github.aaronshan.functions.utils.json.JsonExtract;
+import com.github.aaronshan.functions.utils.json.JsonPath;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
diff --git a/src/main/java/cc/shanruifeng/functions/json/UDFJsonSize.java b/src/main/java/com/github/aaronshan/functions/json/UDFJsonSize.java
similarity index 87%
rename from src/main/java/cc/shanruifeng/functions/json/UDFJsonSize.java
rename to src/main/java/com/github/aaronshan/functions/json/UDFJsonSize.java
index 4ed1dd2..7286413 100644
--- a/src/main/java/cc/shanruifeng/functions/json/UDFJsonSize.java
+++ b/src/main/java/com/github/aaronshan/functions/json/UDFJsonSize.java
@@ -1,7 +1,7 @@
-package cc.shanruifeng.functions.json;
+package com.github.aaronshan.functions.json;
 
-import cc.shanruifeng.functions.utils.json.JsonExtract;
-import cc.shanruifeng.functions.utils.json.JsonPath;
+import com.github.aaronshan.functions.utils.json.JsonExtract;
+import com.github.aaronshan.functions.utils.json.JsonPath;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/map/UDFMapBuild.java b/src/main/java/com/github/aaronshan/functions/map/UDFMapBuild.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/map/UDFMapBuild.java
rename to src/main/java/com/github/aaronshan/functions/map/UDFMapBuild.java
index 5446550..f96b3e4 100644
--- a/src/main/java/cc/shanruifeng/functions/map/UDFMapBuild.java
+++ b/src/main/java/com/github/aaronshan/functions/map/UDFMapBuild.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
 import java.util.LinkedHashMap;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/map/UDFMapConcat.java b/src/main/java/com/github/aaronshan/functions/map/UDFMapConcat.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/map/UDFMapConcat.java
rename to src/main/java/com/github/aaronshan/functions/map/UDFMapConcat.java
index 6a257d8..8b4acf7 100644
--- a/src/main/java/cc/shanruifeng/functions/map/UDFMapConcat.java
+++ b/src/main/java/com/github/aaronshan/functions/map/UDFMapConcat.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
 import java.util.LinkedHashMap;
 import java.util.Map;
diff --git a/src/main/java/cc/shanruifeng/functions/map/UDFMapElementAt.java b/src/main/java/com/github/aaronshan/functions/map/UDFMapElementAt.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/map/UDFMapElementAt.java
rename to src/main/java/com/github/aaronshan/functions/map/UDFMapElementAt.java
index cd9f12e..56627ad 100644
--- a/src/main/java/cc/shanruifeng/functions/map/UDFMapElementAt.java
+++ b/src/main/java/com/github/aaronshan/functions/map/UDFMapElementAt.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
 import java.util.Map;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/map/UDFMapEquals.java b/src/main/java/com/github/aaronshan/functions/map/UDFMapEquals.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/map/UDFMapEquals.java
rename to src/main/java/com/github/aaronshan/functions/map/UDFMapEquals.java
index 0fead58..97cf2f2 100644
--- a/src/main/java/cc/shanruifeng/functions/map/UDFMapEquals.java
+++ b/src/main/java/com/github/aaronshan/functions/map/UDFMapEquals.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
-import cc.shanruifeng.functions.utils.MapUtils;
+import com.github.aaronshan.functions.utils.MapUtils;
 import java.util.Map;
 import org.apache.hadoop.hive.ql.exec.Description;
 import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathCosineSimilarity.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathCosineSimilarity.java
new file mode 100644
index 0000000..e0acea6
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathCosineSimilarity.java
@@ -0,0 +1,151 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.*;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde.serdeConstants;
+import org.apache.hadoop.hive.serde2.io.DoubleWritable;
+import org.apache.hadoop.hive.serde2.objectinspector.MapObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+
+import java.util.Map;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "cosine_similarity"
+        , value = "_FUNC_(map(varchar,double), map(varchar,double)) - cosine similarity between the given sparse vectors."
+        , extended = "Example:\n > select _FUNC_(map(varchar,double), map(varchar,double)) from src;")
+public class UDFMathCosineSimilarity extends GenericUDF {
+    private static final int ARG_COUNT = 2; // Number of arguments to this UDF
+    private transient MapObjectInspector leftMapOI;
+    private transient MapObjectInspector rightMapOI;
+
+    public UDFMathCosineSimilarity() {
+    }
+
+    @Override
+    public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
+        // Check if two arguments were passed
+        if (arguments.length != ARG_COUNT) {
+            throw new UDFArgumentLengthException(
+                    "The function cosine_similarity(map, map) takes exactly " + ARG_COUNT + " arguments.");
+        }
+
+        // Check if two argument is of category LIST
+        for (int i = 0; i < 2; i++) {
+            if (!arguments[i].getCategory().equals(ObjectInspector.Category.MAP)) {
+                throw new UDFArgumentTypeException(i,
+                        "\"" + serdeConstants.MAP_TYPE_NAME + "\" "
+                                + "expected at function cosine_similarity, but "
+                                + "\"" + arguments[i].getTypeName() + "\" "
+                                + "is found");
+            }
+        }
+
+        leftMapOI = (MapObjectInspector) arguments[0];
+        rightMapOI = (MapObjectInspector) arguments[1];
+
+        ObjectInspector leftMapKeyOI = leftMapOI.getMapKeyObjectInspector();
+        ObjectInspector leftMapValueOI = leftMapOI.getMapValueObjectInspector();
+        ObjectInspector rightMapKeyOI = rightMapOI.getMapKeyObjectInspector();
+        ObjectInspector rightMapValueOI = rightMapOI.getMapValueObjectInspector();
+
+        // Check if two map are of same key and value type
+        if (!ObjectInspectorUtils.compareTypes(leftMapKeyOI, rightMapKeyOI)) {
+            throw new UDFArgumentTypeException(1,
+                    "\"" + leftMapKeyOI.getTypeName() + "\""
+                            + " expected at function cosine_similarity key, but "
+                            + "\"" + rightMapKeyOI.getTypeName() + "\""
+                            + " is found");
+        }
+
+        if (!ObjectInspectorUtils.compareTypes(PrimitiveObjectInspectorFactory.javaStringObjectInspector, leftMapKeyOI)) {
+            throw new UDFArgumentTypeException(1,
+                    "\"" + PrimitiveObjectInspectorFactory.javaStringObjectInspector.getTypeName() + "\""
+                            + " expected at function cosine_similarity key, but "
+                            + "\"" + leftMapKeyOI.getTypeName() + "\""
+                            + " is found");
+        }
+
+        if (!ObjectInspectorUtils.compareTypes(leftMapValueOI, rightMapValueOI)) {
+            throw new UDFArgumentTypeException(1,
+                    "\"" + leftMapValueOI.getTypeName() + "\""
+                            + " expected at function cosine_similarity value, but "
+                            + "\"" + rightMapValueOI.getTypeName() + "\""
+                            + " is found");
+        }
+
+        if (!ObjectInspectorUtils.compareTypes(PrimitiveObjectInspectorFactory.javaDoubleObjectInspector, leftMapValueOI)) {
+            throw new UDFArgumentTypeException(1,
+                    "\"" + PrimitiveObjectInspectorFactory.javaDoubleObjectInspector.getTypeName() + "\""
+                            + " expected at function cosine_similarity value, but "
+                            + "\"" + leftMapValueOI.getTypeName() + "\""
+                            + " is found");
+        }
+
+        return ObjectInspectorFactory.getStandardMapObjectInspector(leftMapKeyOI, leftMapValueOI);
+    }
+
+    @Override
+    public Object evaluate(DeferredObject[] arguments) throws HiveException {
+        Object leftMapObj = arguments[0].get();
+        Object rightMapObj = arguments[1].get();
+
+        if (leftMapObj == null || rightMapObj == null) {
+            return null;
+        }
+
+        Map<?,?> leftMap = leftMapOI.getMap(leftMapObj);
+        Map<?,?> rightMap = leftMapOI.getMap(rightMapObj);
+
+        Double normLeftMap = mapL2Norm(leftMap);
+        Double normRightMap = mapL2Norm(rightMap);
+
+        if (normLeftMap == null || normRightMap == null) {
+            return null;
+        }
+
+        double dotProduct = mapDotProduct(leftMap, rightMap);
+        return new DoubleWritable(dotProduct / (normLeftMap * normRightMap));
+    }
+
+    private double mapDotProduct(Map<?,?> leftMap, Map<?,?> rightMap) {
+        double result = 0.0;
+
+        for (Map.Entry<?, ?> entry : rightMap.entrySet()) {
+            if (leftMap.containsKey(entry.getKey())) {
+                Double leftValue = (Double) leftMap.get(entry.getKey());
+                Double rightValue = (Double) entry.getValue();
+                result += leftValue * rightValue;
+            }
+        }
+
+        return result;
+    }
+
+    private Double mapL2Norm(Map<?,?> map) {
+        double norm = 0.0;
+        for (Map.Entry<?, ?> entry : map.entrySet()) {
+            if (entry.getValue() == null) {
+                return null;
+            }
+
+            Double value = (Double) entry.getValue();
+            norm += value * value;
+        }
+
+        return Math.sqrt(norm);
+    }
+
+    @Override
+    public String getDisplayString(String[] strings) {
+        assert (strings.length == ARG_COUNT);
+        return "cosine_similarity(" + strings[0] + ", "
+                + strings[1] + ")";
+    }
+}
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathFromBase.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathFromBase.java
new file mode 100644
index 0000000..d7313bf
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathFromBase.java
@@ -0,0 +1,39 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+
+import static com.github.aaronshan.functions.utils.MathUtils.checkRadix;
+import static java.lang.String.format;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "from_base"
+        , value = "_FUNC_(string, long) - convert a number to a string in the given base."
+        , extended = "Example:\n > select _FUNC_(string, long) from src;")
+public class UDFMathFromBase extends UDF {
+    private LongWritable result = new LongWritable();
+
+    public UDFMathFromBase() {
+    }
+
+    public LongWritable evaluate(Text value, LongWritable radix) throws HiveException {
+        if (value == null || radix == null) {
+            return null;
+        }
+
+        checkRadix(radix.get());
+        try {
+            result.set(Long.parseLong(value.toString(), (int) radix.get()));
+        }
+        catch (NumberFormatException e) {
+            throw new HiveException(format("Not a valid base-%d number: %s", radix, value.toString()), e);
+        }
+        return result;
+    }
+}
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathInfinity.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathInfinity.java
new file mode 100644
index 0000000..bf6b0c0
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathInfinity.java
@@ -0,0 +1,24 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.io.DoubleWritable;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "infinity"
+        , value = "_FUNC_() - Infinity."
+        , extended = "Example:\n > select _FUNC_() from src;")
+public class UDFMathInfinity extends UDF {
+    private DoubleWritable result = new DoubleWritable();
+
+    public UDFMathInfinity() {
+    }
+
+    public DoubleWritable evaluate() {
+        result.set(Double.POSITIVE_INFINITY);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathInverseNormalCdf.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathInverseNormalCdf.java
new file mode 100644
index 0000000..c192549
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathInverseNormalCdf.java
@@ -0,0 +1,32 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.commons.math3.special.Erf;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.DoubleWritable;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-26
+ * @time 23:04
+ */
+@Description(name = "inverse_normal_cdf"
+        , value = "_FUNC_(mean, sd, p) - inverse of normal cdf given a mean, std, and probability."
+        , extended = "Example:\n > select _FUNC_(mean, sd, p) from src;")
+public class UDFMathInverseNormalCdf extends UDF {
+    private DoubleWritable result = new DoubleWritable();
+
+    public UDFMathInverseNormalCdf() {
+    }
+
+    public DoubleWritable evaluate(double mean, double sd, double p) throws HiveException {
+        checkCondition(p > 0 && p < 1, "p must be 0 > p > 1");
+        checkCondition(sd > 0, "sd must > 0");
+
+        result.set(mean + sd * 1.4142135623730951 * Erf.erfInv(2 * p - 1));
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathIsFinite.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathIsFinite.java
new file mode 100644
index 0000000..597906e
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathIsFinite.java
@@ -0,0 +1,29 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.io.BooleanWritable;
+import org.apache.hadoop.io.DoubleWritable;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "is_finite"
+        , value = "_FUNC_(double) - test if value is finite."
+        , extended = "Example:\n > select _FUNC_(double) from src;")
+public class UDFMathIsFinite extends UDF {
+    BooleanWritable result = new BooleanWritable();
+
+    public UDFMathIsFinite() {
+    }
+
+    public BooleanWritable evaluate(DoubleWritable num) {
+        if (num == null) {
+            result.set(false);
+        } else {
+            result.set(Double.isFinite(num.get()));
+        }
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathIsInfinite.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathIsInfinite.java
new file mode 100644
index 0000000..84f8abe
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathIsInfinite.java
@@ -0,0 +1,29 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.io.BooleanWritable;
+import org.apache.hadoop.io.DoubleWritable;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "is_infinite"
+        , value = "_FUNC_(double) - test if value is infinite."
+        , extended = "Example:\n > select _FUNC_(double) from src;")
+public class UDFMathIsInfinite extends UDF {
+    BooleanWritable result = new BooleanWritable();
+
+    public UDFMathIsInfinite() {
+    }
+
+    public BooleanWritable evaluate(DoubleWritable num) {
+        if (num == null) {
+            result.set(false);
+        } else {
+            result.set(Double.isInfinite(num.get()));
+        }
+        return result;
+    }
+}
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathIsNaN.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathIsNaN.java
new file mode 100644
index 0000000..efef890
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathIsNaN.java
@@ -0,0 +1,29 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.io.BooleanWritable;
+import org.apache.hadoop.io.DoubleWritable;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "is_nan"
+        , value = "_FUNC_(double) - test if value is nan."
+        , extended = "Example:\n > select _FUNC_(double) from src;")
+public class UDFMathIsNaN extends UDF {
+    BooleanWritable result = new BooleanWritable();
+
+    public UDFMathIsNaN() {
+    }
+
+    public BooleanWritable evaluate(DoubleWritable num) {
+        if (num == null) {
+            result.set(false);
+        } else {
+            result.set(Double.isNaN(num.get()));
+        }
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathNaN.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathNaN.java
new file mode 100644
index 0000000..9d6d55f
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathNaN.java
@@ -0,0 +1,24 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.io.DoubleWritable;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "NaN"
+        , value = "_FUNC_() - constant representing not-a-number."
+        , extended = "Example:\n > select _FUNC_() from src;")
+public class UDFMathNaN extends UDF {
+    private DoubleWritable result = new DoubleWritable();
+
+    public UDFMathNaN() {
+    }
+
+    public DoubleWritable evaluate() {
+        result.set(Double.NaN);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathNormalCdf.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathNormalCdf.java
new file mode 100644
index 0000000..a6cc43a
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathNormalCdf.java
@@ -0,0 +1,30 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.commons.math3.special.Erf;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.DoubleWritable;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-26
+ * @time 23:03
+ */
+@Description(name = "normal_cdf"
+        , value = "_FUNC_(mean, sd, v) - normal cdf given a mean, standard deviation, and value."
+        , extended = "Example:\n > select _FUNC_(mean, sd, v) from src;")
+public class UDFMathNormalCdf extends UDF {
+    private DoubleWritable result = new DoubleWritable();
+
+    public UDFMathNormalCdf() {
+    }
+
+    public DoubleWritable evaluate(double mean, double standardDeviation, double value) throws HiveException {
+        checkCondition(standardDeviation > 0, "standardDeviation must > 0");
+        result.set(0.5 * (1 + Erf.erf((value - mean) / (standardDeviation * Math.sqrt(2)))));
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/math/UDFMathToBase.java b/src/main/java/com/github/aaronshan/functions/math/UDFMathToBase.java
new file mode 100644
index 0000000..0368843
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/math/UDFMathToBase.java
@@ -0,0 +1,33 @@
+package com.github.aaronshan.functions.math;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+
+import static com.github.aaronshan.functions.utils.MathUtils.checkRadix;
+
+/**
+ * @author ruifeng.shan
+ * @date 18-7-23
+ */
+@Description(name = "to_base"
+        , value = "_FUNC_(long, long) - convert a number to a string in the given base."
+        , extended = "Example:\n > select _FUNC_(long, long) from src;")
+public class UDFMathToBase extends UDF {
+    private Text result = new Text();
+
+    public UDFMathToBase() {
+    }
+
+    public Text evaluate(LongWritable value, LongWritable radix) throws HiveException {
+        if (value == null || radix == null) {
+            return null;
+        }
+
+        checkRadix(radix.get());
+        result.set(Long.toString(value.get(), (int) radix.get()));
+        return result;
+    }
+}
diff --git a/src/main/java/cc/shanruifeng/functions/model/ChinaIdArea.java b/src/main/java/com/github/aaronshan/functions/model/ChinaIdArea.java
similarity index 91%
rename from src/main/java/cc/shanruifeng/functions/model/ChinaIdArea.java
rename to src/main/java/com/github/aaronshan/functions/model/ChinaIdArea.java
index b45684f..9d9e145 100644
--- a/src/main/java/cc/shanruifeng/functions/model/ChinaIdArea.java
+++ b/src/main/java/com/github/aaronshan/functions/model/ChinaIdArea.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.model;
+package com.github.aaronshan.functions.model;
 
 /**
  * @author ruifeng.shan
diff --git a/src/main/java/com/github/aaronshan/functions/regexp/Re2JRegexp.java b/src/main/java/com/github/aaronshan/functions/regexp/Re2JRegexp.java
new file mode 100644
index 0000000..585fae1
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/regexp/Re2JRegexp.java
@@ -0,0 +1,148 @@
+package com.github.aaronshan.functions.regexp;
+
+import com.google.common.collect.Lists;
+import com.google.re2j.Matcher;
+import com.google.re2j.Options;
+import com.google.re2j.Pattern;
+import io.airlift.slice.Slice;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkState;
+import static com.google.re2j.Options.Algorithm.DFA_FALLBACK_TO_NFA;
+import static java.lang.String.format;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 22:20
+ */
+public final class Re2JRegexp {
+    private static final Logger log = LoggerFactory.getLogger(Re2JRegexp.class);
+
+    private static final java.util.regex.Pattern DOT_STAR_PREFIX_PATTERN = java.util.regex.Pattern.compile("(?s)^(\\.\\*\\??)?(.*)");
+    private static final int CORE_PATTERN_INDEX = 2;
+
+    public final int dfaStatesLimit;
+    public final int dfaRetries;
+
+    public final Pattern re2jPattern;
+    public final Pattern re2jPatternWithoutDotStartPrefix;
+
+    public Re2JRegexp(int dfaStatesLimit, int dfaRetries, Slice pattern) {
+        this.dfaStatesLimit = dfaStatesLimit;
+        this.dfaRetries = dfaRetries;
+
+        Options options = Options.builder()
+                .setAlgorithm(DFA_FALLBACK_TO_NFA)
+                .setMaximumNumberOfDFAStates(dfaStatesLimit)
+                .setNumberOfDFARetries(dfaRetries)
+                .setEventsListener(new RE2JEventsListener())
+                .build();
+
+        String patternString = pattern.toStringUtf8();
+        re2jPattern = Pattern.compile(patternString, options);
+
+        // Remove .*? prefix. DFA has optimization which does fast lookup for first byte of a potential match.
+        // When pattern is prefixed with .*? this optimization doesn't work in Pattern.find() function.
+        java.util.regex.Matcher dotStarPrefixMatcher = DOT_STAR_PREFIX_PATTERN.matcher(patternString);
+        checkState(dotStarPrefixMatcher.matches());
+        String patternStringWithoutDotStartPrefix = dotStarPrefixMatcher.group(CORE_PATTERN_INDEX);
+
+        if (!patternStringWithoutDotStartPrefix.equals(patternString)) {
+            re2jPatternWithoutDotStartPrefix = Pattern.compile(patternStringWithoutDotStartPrefix, options);
+        } else {
+            re2jPatternWithoutDotStartPrefix = re2jPattern;
+        }
+    }
+
+    private static void validateGroup(int group, int groupCount) throws HiveException {
+        if (group < 0) {
+            throw new HiveException("Group cannot be negative");
+        }
+        if (group > groupCount) {
+            throw new HiveException(format("Pattern has %d groups. Cannot access group %d", groupCount, group));
+        }
+    }
+
+    public boolean matches(Slice source) {
+        return re2jPatternWithoutDotStartPrefix.find(source);
+    }
+
+    public Slice replace(Slice source, Slice replacement) throws HiveException {
+        Matcher matcher = re2jPattern.matcher(source);
+        try {
+            return matcher.replaceAll(replacement);
+        } catch (IndexOutOfBoundsException e) {
+            throw new HiveException("Illegal replacement sequence: " + replacement.toStringUtf8());
+        } catch (IllegalArgumentException e) {
+            throw new HiveException("Illegal replacement sequence: " + replacement.toStringUtf8());
+        }
+    }
+
+    public static int toIntExact(long value) {
+        if ((int)value != value) {
+            throw new ArithmeticException("integer overflow");
+        }
+        return (int)value;
+    }
+
+    public List<Object> extractAll(Slice source, long groupIndex) throws HiveException {
+        Matcher matcher = re2jPattern.matcher(source);
+        int group = (int)(groupIndex);
+        validateGroup(group, matcher.groupCount());
+
+        List<Object> list = Lists.newArrayList();
+        while (true) {
+            if (!matcher.find()) {
+                break;
+            }
+
+            Slice searchedGroup = matcher.group(group);
+            if (searchedGroup == null) {
+                list.add(null);
+                continue;
+            }
+            list.add(searchedGroup.toString());
+        }
+        return list;
+    }
+
+    public Slice extract(Slice source, long groupIndex) throws HiveException {
+        Matcher matcher = re2jPattern.matcher(source);
+        int group = (int)(groupIndex);
+        validateGroup(group, matcher.groupCount());
+
+        if (!matcher.find()) {
+            return null;
+        }
+
+        return matcher.group(group);
+    }
+
+    public List<Object> split(Slice source) {
+        Matcher matcher = re2jPattern.matcher(source);
+        List<Object> list = Lists.newArrayList();
+
+        int lastEnd = 0;
+        while (matcher.find()) {
+            Slice slice = source.slice(lastEnd, matcher.start() - lastEnd);
+            lastEnd = matcher.end();
+            list.add(slice.toString());
+        }
+
+        list.add(source.slice(lastEnd, source.length() - lastEnd).toString());
+        return list;
+    }
+
+    private class RE2JEventsListener
+            implements Options.EventsListener {
+        @Override
+        public void fallbackToNFA() {
+            log.debug("Fallback to NFA, pattern: %s, DFA states limit: %d, DFA retries: %d", re2jPattern.pattern(), dfaStatesLimit, dfaRetries);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpExtract.java b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpExtract.java
new file mode 100644
index 0000000..5041729
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpExtract.java
@@ -0,0 +1,42 @@
+package com.github.aaronshan.functions.regexp;
+
+import io.airlift.slice.Slices;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 22:38
+ */
+@Description(name = "regexp_extract"
+        , value = "_FUNC_(string, string) - returns substrings matching a regular expression."
+        , extended = "Example:\n > select _FUNC_(string, pattern) from src;")
+public class UDFRe2JRegexpExtract extends UDF {
+    private static Re2JRegexp re2JRegexp;
+    private Text result = new Text();
+
+    public UDFRe2JRegexpExtract() {
+
+    }
+
+    public Text evaluate(Text source, Text pattern) throws HiveException {
+        return evaluate(source, pattern, new LongWritable(0));
+    }
+
+    public Text evaluate(Text source, Text pattern, LongWritable groupIndex) throws HiveException {
+        if (source == null) {
+            return null;
+        }
+
+        if (re2JRegexp == null) {
+            re2JRegexp = new Re2JRegexp(Integer.MAX_VALUE, 5, Slices.utf8Slice(pattern.toString()));
+        }
+
+        result.set(re2JRegexp.extract(Slices.utf8Slice(source.toString()), groupIndex.get()).toStringUtf8());
+        return result;
+    }
+}
diff --git a/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpExtractAll.java b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpExtractAll.java
new file mode 100644
index 0000000..fa03a5b
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpExtractAll.java
@@ -0,0 +1,100 @@
+package com.github.aaronshan.functions.regexp;
+
+import io.airlift.slice.Slices;
+import java.util.ArrayList;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 22:38
+ */
+@Description(name = "regexp_extract_all"
+        , value = "_FUNC_(string, string) - string(s) extracted using the given pattern\n" +
+        "_FUNC_(string, string, long) - group(s) extracted using the given pattern."
+        , extended = "Example:\n > select _FUNC_(string, pattern) from src;")
+public class UDFRe2JRegexpExtractAll extends GenericUDF {
+    private transient ArrayList<Object> result = new ArrayList<Object>();
+    private transient Re2JRegexp re2JRegexp;
+
+    public UDFRe2JRegexpExtractAll() {
+
+    }
+
+    @Override
+    public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
+        // Check if two arguments were passed
+        if (arguments.length != 2 || arguments.length != 3) {
+            throw new UDFArgumentLengthException(
+                    "The function regexp_extract_all takes exactly 2 or 3 arguments.");
+        }
+
+        for (int i = 0; i < 2; i++) {
+            if (!ObjectInspectorUtils.compareTypes(PrimitiveObjectInspectorFactory.javaStringObjectInspector, arguments[i])) {
+                throw new UDFArgumentTypeException(i,
+                        "\"" + PrimitiveObjectInspectorFactory.javaStringObjectInspector.getTypeName() + "\" "
+                                + "expected at function regexp_extract_all, but "
+                                + "\"" + arguments[i].getTypeName() + "\" "
+                                + "is found");
+            }
+        }
+
+        if (arguments.length == 3) {
+            if (!ObjectInspectorUtils.compareTypes(PrimitiveObjectInspectorFactory.javaLongObjectInspector, arguments[2])) {
+                throw new UDFArgumentTypeException(2,
+                        "\"" + PrimitiveObjectInspectorFactory.javaLongObjectInspector.getTypeName() + "\" "
+                                + "expected at function regexp_extract_all, but "
+                                + "\"" + arguments[2].getTypeName() + "\" "
+                                + "is found");
+            }
+        }
+
+        ObjectInspector expectOI = PrimitiveObjectInspectorFactory.javaStringObjectInspector;
+
+        return ObjectInspectorFactory.getStandardListObjectInspector(expectOI);
+    }
+
+    @Override
+    public Object evaluate(DeferredObject[] arguments) throws HiveException {
+        String source = (String) arguments[0].get();
+        String pattern = (String) arguments[1].get();
+        Long groupIndex = 0L;
+        if (arguments.length == 3) {
+            groupIndex = (Long) arguments[2].get();
+        }
+
+        if (source == null) {
+            return null;
+        }
+
+        if (re2JRegexp == null) {
+            re2JRegexp = new Re2JRegexp(Integer.MAX_VALUE, 5, Slices.utf8Slice(pattern));
+        }
+
+        result.clear();
+        result.addAll(re2JRegexp.extractAll(Slices.utf8Slice(source), groupIndex));
+
+        return result;
+    }
+
+    @Override
+    public String getDisplayString(String[] strings) {
+        assert (strings.length == 2 || strings.length == 3);
+        if (strings.length == 2) {
+            return "regexp_extract_all(" + strings[0] + ", "
+                    + strings[1] + ")";
+        } else {
+            return "regexp_extract_all(" + strings[0] + ", "
+                    + strings[1] + ", " + strings[2] + ")";
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpLike.java b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpLike.java
new file mode 100644
index 0000000..683e6f8
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpLike.java
@@ -0,0 +1,35 @@
+package com.github.aaronshan.functions.regexp;
+
+import io.airlift.slice.Slices;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.io.Text;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 22:36
+ */
+@Description(name = "regexp_like"
+        , value = "_FUNC_(string, string) - returns substrings matching a regular expression."
+        , extended = "Example:\n > select _FUNC_(string, pattern) from src;")
+public class UDFRe2JRegexpLike extends UDF {
+    private static Re2JRegexp re2JRegexp;
+
+    public UDFRe2JRegexpLike() {
+
+    }
+
+    public boolean evaluate(Text text, Text pattern) {
+        if (text == null) {
+            return false;
+        }
+
+        if (re2JRegexp == null) {
+            re2JRegexp = new Re2JRegexp(Integer.MAX_VALUE, 5, Slices.utf8Slice(pattern.toString()));
+        }
+
+        return re2JRegexp.matches(Slices.utf8Slice(text.toString()));
+    }
+
+}
diff --git a/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpReplace.java b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpReplace.java
new file mode 100644
index 0000000..6c74f52
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpReplace.java
@@ -0,0 +1,44 @@
+package com.github.aaronshan.functions.regexp;
+
+import io.airlift.slice.Slices;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.Text;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 22:37
+ */
+@Description(name = "regexp_replace"
+        , value = "_FUNC_(string, string) - removes substrings matching a regular expression\n" +
+        "_FUNC_(string, string, string) - replaces substrings matching a regular expression by given string."
+        , extended = "Example:\n > select _FUNC_(string, pattern) from src;\n" +
+        "select _FUNC_(string, pattern, replacement) from src;")
+public class UDFRe2JRegexpReplace extends UDF {
+    private static Re2JRegexp re2JRegexp;
+    private Text result = new Text();
+
+    public UDFRe2JRegexpReplace() {
+
+    }
+
+    public Text evaluate(Text source, Text pattern) throws HiveException {
+        return evaluate(source, pattern, new Text(Slices.EMPTY_SLICE.toStringUtf8()));
+    }
+
+    public Text evaluate(Text source, Text pattern, Text replacement) throws HiveException {
+        if (source == null) {
+            return null;
+        }
+
+        if (re2JRegexp == null) {
+            re2JRegexp = new Re2JRegexp(Integer.MAX_VALUE, 5, Slices.utf8Slice(pattern.toString()));
+        }
+
+        result.set(re2JRegexp.replace(Slices.utf8Slice(source.toString()), Slices.utf8Slice(replacement.toString())).toStringUtf8());
+        return result;
+    }
+
+}
diff --git a/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpSplit.java b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpSplit.java
new file mode 100644
index 0000000..1022a8f
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/regexp/UDFRe2JRegexpSplit.java
@@ -0,0 +1,81 @@
+package com.github.aaronshan.functions.regexp;
+
+import io.airlift.slice.Slices;
+import java.util.ArrayList;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 22:38
+ */
+@Description(name = "regexp_split"
+        , value = "_FUNC_(string, string) - returns array of strings split by pattern."
+        , extended = "Example:\n > select _FUNC_(string, pattern) from src;")
+public class UDFRe2JRegexpSplit extends GenericUDF {
+    private static final int ARG_COUNT = 2;
+    private transient ArrayList<Object> result = new ArrayList<Object>();
+    private transient Re2JRegexp re2JRegexp;
+
+    public UDFRe2JRegexpSplit() {
+
+    }
+
+    @Override
+    public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
+        // Check if two arguments were passed
+        if (arguments.length != ARG_COUNT) {
+            throw new UDFArgumentLengthException(
+                    "The function regexp_split(string, pattern) takes exactly " + ARG_COUNT + " arguments.");
+        }
+
+        for (int i = 0; i < ARG_COUNT; i++) {
+            if (!ObjectInspectorUtils.compareTypes(PrimitiveObjectInspectorFactory.javaStringObjectInspector, arguments[i])) {
+                throw new UDFArgumentTypeException(i,
+                        "\"" + PrimitiveObjectInspectorFactory.javaStringObjectInspector.getTypeName() + "\" "
+                                + "expected at function regexp_split, but "
+                                + "\"" + arguments[i].getTypeName() + "\" "
+                                + "is found");
+            }
+        }
+
+        ObjectInspector expectOI = PrimitiveObjectInspectorFactory.javaStringObjectInspector;
+
+        return ObjectInspectorFactory.getStandardListObjectInspector(expectOI);
+    }
+
+    @Override
+    public Object evaluate(DeferredObject[] arguments) throws HiveException {
+        String source = (String) arguments[0].get();
+        String pattern = (String) arguments[1].get();
+
+        if (source == null) {
+            return null;
+        }
+
+        if (re2JRegexp == null) {
+            re2JRegexp = new Re2JRegexp(Integer.MAX_VALUE, 5, Slices.utf8Slice(pattern));
+        }
+
+        result.clear();
+        result.addAll(re2JRegexp.split(Slices.utf8Slice(source)));
+
+        return result;
+    }
+
+    @Override
+    public String getDisplayString(String[] strings) {
+        assert (strings.length == ARG_COUNT);
+        return "regexp_split(" + strings[0] + ", "
+                + strings[1] + ")";
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cc/shanruifeng/functions/string/UDFChineseToPinYin.java b/src/main/java/com/github/aaronshan/functions/string/UDFChineseToPinYin.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/string/UDFChineseToPinYin.java
rename to src/main/java/com/github/aaronshan/functions/string/UDFChineseToPinYin.java
index b468748..66ddb11 100755
--- a/src/main/java/cc/shanruifeng/functions/string/UDFChineseToPinYin.java
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFChineseToPinYin.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.string;
+package com.github.aaronshan.functions.string;
 
 import net.sourceforge.pinyin4j.PinyinHelper;
 import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;
diff --git a/src/main/java/com/github/aaronshan/functions/string/UDFCodePoint.java b/src/main/java/com/github/aaronshan/functions/string/UDFCodePoint.java
new file mode 100644
index 0000000..bd0324f
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFCodePoint.java
@@ -0,0 +1,46 @@
+package com.github.aaronshan.functions.string;
+
+import io.airlift.slice.Slice;
+import io.airlift.slice.Slices;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+import static io.airlift.slice.SliceUtf8.getCodePointAt;
+import static io.airlift.slice.SliceUtf8.countCodePoints;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-26
+ * @time 23:23
+ */
+@Description(name = "codepoint"
+        , value = "_FUNC_(string) - returns Unicode code point of a single character string."
+        , extended = "Example:\n > select _FUNC_(string) from src;")
+public class UDFCodePoint extends UDF {
+    private LongWritable result = new LongWritable();
+
+    public UDFCodePoint() {
+    }
+
+    /**
+     * codepoint.
+     *
+     * @param text
+     * @return
+     */
+    public LongWritable evaluate(Text text) throws HiveException {
+        if (text == null) {
+            return null;
+        }
+
+        Slice slice = Slices.utf8Slice(text.toString());
+        checkCondition(countCodePoints(slice) == 1, "Input string must be a single character string");
+
+        result.set(getCodePointAt(slice, 0));
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cc/shanruifeng/functions/string/UDFMd5.java b/src/main/java/com/github/aaronshan/functions/string/UDFMd5.java
similarity index 94%
rename from src/main/java/cc/shanruifeng/functions/string/UDFMd5.java
rename to src/main/java/com/github/aaronshan/functions/string/UDFMd5.java
index 807b6bf..dd9060a 100644
--- a/src/main/java/cc/shanruifeng/functions/string/UDFMd5.java
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFMd5.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.string;
+package com.github.aaronshan.functions.string;
 
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
diff --git a/src/main/java/cc/shanruifeng/functions/string/UDFSha256.java b/src/main/java/com/github/aaronshan/functions/string/UDFSha256.java
similarity index 85%
rename from src/main/java/cc/shanruifeng/functions/string/UDFSha256.java
rename to src/main/java/com/github/aaronshan/functions/string/UDFSha256.java
index df4d05d..b8e942f 100644
--- a/src/main/java/cc/shanruifeng/functions/string/UDFSha256.java
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFSha256.java
@@ -1,7 +1,8 @@
-package cc.shanruifeng.functions.string;
+package com.github.aaronshan.functions.string;
 
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
 import org.apache.hadoop.io.Text;
 
 /**
@@ -12,7 +13,7 @@
 @Description(name = "sha256"
         , value = "_FUNC_(string) - get sha256 hash code by given input string."
         , extended = "Example:\n > select _FUNC_(string) from src;")
-public class UDFSha256 {
+public class UDFSha256 extends UDF {
     private Text result = new Text();
 
     public UDFSha256() {
diff --git a/src/main/java/com/github/aaronshan/functions/string/UDFStringHammingDistance.java b/src/main/java/com/github/aaronshan/functions/string/UDFStringHammingDistance.java
new file mode 100644
index 0000000..ecf7a49
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFStringHammingDistance.java
@@ -0,0 +1,66 @@
+package com.github.aaronshan.functions.string;
+
+import io.airlift.slice.Slice;
+import io.airlift.slice.Slices;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+import static io.airlift.slice.SliceUtf8.lengthOfCodePoint;
+import static io.airlift.slice.SliceUtf8.tryGetCodePointAt;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-26
+ * @time 23:43
+ */
+@Description(name = "hamming_distance"
+        , value = "_FUNC_(string, string) - computes Hamming distance between two strings."
+        , extended = "Example:\n > select _FUNC_(string, string) from src;")
+public class UDFStringHammingDistance extends UDF {
+    private LongWritable result = new LongWritable(0);
+
+    public UDFStringHammingDistance() {
+    }
+
+    /**
+     * hamming distance.
+     *
+     * @param leftText
+     * @param rightText
+     * @return
+     */
+    public LongWritable evaluate(Text leftText, Text rightText) throws HiveException {
+        if (leftText == null || rightText == null) {
+            return result;
+        }
+
+        Slice left = Slices.utf8Slice(leftText.toString());
+        Slice right = Slices.utf8Slice(rightText.toString());
+        int distance = 0;
+        int leftPosition = 0;
+        int rightPosition = 0;
+        while (leftPosition < left.length() && rightPosition < right.length()) {
+            int codePointLeft = tryGetCodePointAt(left, leftPosition);
+            int codePointRight = tryGetCodePointAt(right, rightPosition);
+
+            // if both code points are invalid, we do not care if they are equal
+            // the following code treats them as equal if they happen to be of the same length
+            if (codePointLeft != codePointRight) {
+                distance++;
+            }
+
+            leftPosition += codePointLeft > 0 ? lengthOfCodePoint(codePointLeft) : -codePointLeft;
+            rightPosition += codePointRight > 0 ? lengthOfCodePoint(codePointRight) : -codePointRight;
+        }
+
+        checkCondition(leftPosition == left.length() && rightPosition == right.length(),
+                "The input strings to hamming_distance function must have the same length");
+        result.set(distance);
+
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/string/UDFStringLevenshteinDistance.java b/src/main/java/com/github/aaronshan/functions/string/UDFStringLevenshteinDistance.java
new file mode 100644
index 0000000..08cd10d
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFStringLevenshteinDistance.java
@@ -0,0 +1,113 @@
+package com.github.aaronshan.functions.string;
+
+import io.airlift.slice.Slice;
+import io.airlift.slice.Slices;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+import static io.airlift.slice.SliceUtf8.getCodePointAt;
+import static io.airlift.slice.SliceUtf8.lengthOfCodePoint;
+import static io.airlift.slice.SliceUtf8.tryGetCodePointAt;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-26
+ * @time 23:53
+ */
+@Description(name = "levenshtein_distance"
+        , value = "_FUNC_(string, string) - computes Levenshtein distance between two strings."
+        , extended = "Example:\n > select _FUNC_(string, string) from src;")
+public class UDFStringLevenshteinDistance extends UDF {
+    private LongWritable result = new LongWritable(0);
+
+    public UDFStringLevenshteinDistance() {
+    }
+
+    /**
+     * hamming distance.
+     *
+     * @param leftText
+     * @param rightText
+     * @return
+     */
+    public LongWritable evaluate(Text leftText, Text rightText) throws HiveException {
+        if (leftText == null || rightText == null) {
+            return null;
+        }
+
+        Slice left = Slices.utf8Slice(leftText.toString());
+        Slice right = Slices.utf8Slice(rightText.toString());
+        int[] leftCodePoints = castToCodePoints(left);
+        int[] rightCodePoints = castToCodePoints(right);
+
+        if (leftCodePoints.length < rightCodePoints.length) {
+            int[] tempCodePoints = leftCodePoints;
+            leftCodePoints = rightCodePoints;
+            rightCodePoints = tempCodePoints;
+        }
+
+        if (rightCodePoints.length == 0) {
+            result.set(leftCodePoints.length);
+            return result;
+        }
+
+        checkCondition((leftCodePoints.length * (rightCodePoints.length - 1)) <= 1000000,
+                "The combined inputs for Levenshtein distance are too large");
+
+        int[] distances = new int[rightCodePoints.length];
+        for (int i = 0; i < rightCodePoints.length; i++) {
+            distances[i] = i + 1;
+        }
+
+        for (int i = 0; i < leftCodePoints.length; i++) {
+            int leftUpDistance = distances[0];
+            if (leftCodePoints[i] == rightCodePoints[0]) {
+                distances[0] = i;
+            }
+            else {
+                distances[0] = Math.min(i, distances[0]) + 1;
+            }
+            for (int j = 1; j < rightCodePoints.length; j++) {
+                int leftUpDistanceNext = distances[j];
+                if (leftCodePoints[i] == rightCodePoints[j]) {
+                    distances[j] = leftUpDistance;
+                }
+                else {
+                    distances[j] = Math.min(distances[j - 1], Math.min(leftUpDistance, distances[j])) + 1;
+                }
+                leftUpDistance = leftUpDistanceNext;
+            }
+        }
+
+        result.set(distances[rightCodePoints.length - 1]);
+
+        return result;
+    }
+
+    private static int[] castToCodePoints(Slice slice) throws HiveException {
+        int[] codePoints = new int[safeCountCodePoints(slice)];
+        int position = 0;
+        for (int index = 0; index < codePoints.length; index++) {
+            codePoints[index] = getCodePointAt(slice, position);
+            position += lengthOfCodePoint(slice, position);
+        }
+        return codePoints;
+    }
+
+    private static int safeCountCodePoints(Slice slice) throws HiveException {
+        int codePoints = 0;
+        for (int position = 0; position < slice.length(); ) {
+            int codePoint = tryGetCodePointAt(slice, position);
+            if (codePoint < 0) {
+                throw new HiveException("Invalid UTF-8 encoding in characters: " + slice.toStringUtf8());
+            }
+            position += lengthOfCodePoint(codePoint);
+            codePoints++;
+        }
+        return codePoints;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/string/UDFStringNormalize.java b/src/main/java/com/github/aaronshan/functions/string/UDFStringNormalize.java
new file mode 100644
index 0000000..cf2ce98
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFStringNormalize.java
@@ -0,0 +1,39 @@
+package com.github.aaronshan.functions.string;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.io.Text;
+
+import java.text.Normalizer;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27 下午12:37
+ */
+@Description(name = "normalize"
+        , value = "_FUNC_(string, string) - transforms the string to normalized form."
+        , extended = "Example:\n > select _FUNC_(string, form_str) from src;")
+public class UDFStringNormalize extends UDF {
+    private Text result = new Text();
+
+    public UDFStringNormalize() {
+    }
+
+    public Text evaluate(Text text, Text form) throws HiveException {
+        if (text == null) {
+            return null;
+        }
+
+        Normalizer.Form targetForm;
+        try {
+            targetForm = Normalizer.Form.valueOf(form.toString());
+        }
+        catch (IllegalArgumentException e) {
+            throw new HiveException("Normalization form must be one of [NFD, NFC, NFKD, NFKC]");
+        }
+
+        result.set(Normalizer.normalize(text.toString(), targetForm));
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/github/aaronshan/functions/string/UDFStringPosition.java b/src/main/java/com/github/aaronshan/functions/string/UDFStringPosition.java
new file mode 100644
index 0000000..59ab65c
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFStringPosition.java
@@ -0,0 +1,40 @@
+package com.github.aaronshan.functions.string;
+
+import org.apache.commons.codec.digest.DigestUtils;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDF;
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27 下午12:08
+ */
+@Description(name = "strpos"
+        , value = "_FUNC_(string, substring) - returns index of first occurrence of a substring (or 0 if not found)."
+        , extended = "Example:\n > select _FUNC_(string, substring) from src;")
+public class UDFStringPosition extends UDF {
+    private LongWritable result = new LongWritable(0);
+
+    public UDFStringPosition() {
+    }
+
+    public LongWritable evaluate(Text text, Text subText) {
+        if (text == null || subText == null) {
+            return result;
+        }
+
+        if (subText.getLength() == 1) {
+            result.set(1);
+            return result;
+        }
+
+        int index = text.toString().indexOf(subText.toString());
+        if (index < 0) {
+            return result;
+        }
+
+        result.set(index + 1);
+        return result;
+    }
+}
diff --git a/src/main/java/com/github/aaronshan/functions/string/UDFStringSplitToMap.java b/src/main/java/com/github/aaronshan/functions/string/UDFStringSplitToMap.java
new file mode 100644
index 0000000..d57ae8e
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFStringSplitToMap.java
@@ -0,0 +1,83 @@
+package com.github.aaronshan.functions.string;
+
+import com.google.common.base.Splitter;
+import java.util.HashMap;
+import java.util.Map;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 00:04
+ */
+@Description(name = "split_to_map"
+        , value = "_FUNC_(string, string, string) - returns a map created using the given key/value arrays."
+        , extended = "Example:\n > select _FUNC_('a=123,b=.4,c=,=d', ',', '=') from src;")
+public class UDFStringSplitToMap extends GenericUDF {
+    private static final int ARG_COUNT = 3; // Number of arguments to this UDF
+    HashMap<String, String> result = new HashMap<String, String>();
+
+    @Override
+    public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
+        // Check if two arguments were passed
+        if (arguments.length != ARG_COUNT) {
+            throw new UDFArgumentLengthException(
+                    "The function split_to_map(string, string, string) takes exactly " + ARG_COUNT + " arguments.");
+        }
+
+        // Check if two argument is of string
+        for (int i = 0; i < 3; i++) {
+            if (!ObjectInspectorUtils.compareTypes(PrimitiveObjectInspectorFactory.javaStringObjectInspector, arguments[i])) {
+                throw new UDFArgumentTypeException(i,
+                        "\"" + PrimitiveObjectInspectorFactory.javaStringObjectInspector.getTypeName() + "\" "
+                                + "expected at function split_to_map, but "
+                                + "\"" + arguments[i].getTypeName() + "\" "
+                                + "is found");
+            }
+        }
+
+        ObjectInspector mapKeyOI = PrimitiveObjectInspectorFactory.javaStringObjectInspector;
+        ObjectInspector mapValueOI = PrimitiveObjectInspectorFactory.javaStringObjectInspector;
+
+        return ObjectInspectorFactory.getStandardMapObjectInspector(mapKeyOI, mapValueOI);
+    }
+
+    @Override
+    public Object evaluate(DeferredObject[] arguments) throws HiveException {
+        String string = (String) arguments[0].get();
+        String entryDelimiter = (String) arguments[1].get();
+        String keyValueDelimiter = (String) arguments[2].get();
+
+        checkCondition(entryDelimiter.length() > 0, "entryDelimiter is empty");
+        checkCondition(keyValueDelimiter.length() > 0, "keyValueDelimiter is empty");
+        checkCondition(!entryDelimiter.equals(keyValueDelimiter), "entryDelimiter and keyValueDelimiter must not be the same");
+
+        if (string == null) {
+            return null;
+        }
+
+        result.clear();
+        Map<String, String> map = Splitter.on(entryDelimiter).withKeyValueSeparator(keyValueDelimiter).split(string);
+        result.putAll(map);
+
+        return result;
+    }
+
+    @Override
+    public String getDisplayString(String[] strings) {
+        assert (strings.length == ARG_COUNT);
+        return "split_to_map(" + strings[0] + ", "
+                + strings[1] + ", " + strings[2] + ")";
+    }
+}
diff --git a/src/main/java/com/github/aaronshan/functions/string/UDFStringSplitToMultimap.java b/src/main/java/com/github/aaronshan/functions/string/UDFStringSplitToMultimap.java
new file mode 100644
index 0000000..2714dcc
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/string/UDFStringSplitToMultimap.java
@@ -0,0 +1,99 @@
+package com.github.aaronshan.functions.string;
+
+import com.google.common.base.Splitter;
+import com.google.common.collect.ArrayListMultimap;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Multimap;
+import java.util.HashMap;
+import java.util.List;
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
+import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+
+/**
+ * @author ruifeng.shan
+ * @date 2018-07-27
+ * @time 00:04
+ */
+@Description(name = "split_to_multimap"
+        , value = "_FUNC_(string, string, string) - creates a multimap by splitting a string into key/value pairs."
+        , extended = "Example:\n > select _FUNC_('a=123,b=.4,c=,=d', ',', '=') from src;")
+public class UDFStringSplitToMultimap extends GenericUDF {
+    private static final int ARG_COUNT = 3; // Number of arguments to this UDF
+    HashMap<String, List<String>> result = new HashMap<String, List<String>>();
+
+    @Override
+    public ObjectInspector initialize(ObjectInspector[] arguments) throws UDFArgumentException {
+        // Check if two arguments were passed
+        if (arguments.length != ARG_COUNT) {
+            throw new UDFArgumentLengthException(
+                    "The function split_to_multimap(string, string, string) takes exactly " + ARG_COUNT + " arguments.");
+        }
+
+        // Check if two argument is of string
+        for (int i = 0; i < 3; i++) {
+            if (!ObjectInspectorUtils.compareTypes(PrimitiveObjectInspectorFactory.javaStringObjectInspector, arguments[i])) {
+                throw new UDFArgumentTypeException(i,
+                        "\"" + PrimitiveObjectInspectorFactory.javaStringObjectInspector.getTypeName() + "\" "
+                                + "expected at function split_to_multimap, but "
+                                + "\"" + arguments[i].getTypeName() + "\" "
+                                + "is found");
+            }
+        }
+
+        ObjectInspector mapKeyOI = PrimitiveObjectInspectorFactory.javaStringObjectInspector;
+        ObjectInspector mapValueOI = ObjectInspectorFactory.getStandardListObjectInspector(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
+
+        return ObjectInspectorFactory.getStandardMapObjectInspector(mapKeyOI, mapValueOI);
+    }
+
+    @Override
+    public Object evaluate(DeferredObject[] arguments) throws HiveException {
+        String string = (String) arguments[0].get();
+        String entryDelimiter = (String) arguments[1].get();
+        String keyValueDelimiter = (String) arguments[2].get();
+
+        checkCondition(entryDelimiter.length() > 0, "entryDelimiter is empty");
+        checkCondition(keyValueDelimiter.length() > 0, "keyValueDelimiter is empty");
+        checkCondition(!entryDelimiter.equals(keyValueDelimiter), "entryDelimiter and keyValueDelimiter must not be the same");
+
+        if (string == null) {
+            return null;
+        }
+
+        Multimap<String, String> multimap = ArrayListMultimap.create();
+
+        result.clear();
+        List<String> list = Splitter.on(entryDelimiter).splitToList(string);
+        for (String str : list) {
+            String[] fields = str.split(keyValueDelimiter);
+            if (fields.length != 2) {
+                throw new HiveException("Key-value delimiter must appear exactly once in each entry. Bad input: " + string);
+            }
+            multimap.put(fields[0], fields[1]);
+
+        }
+
+        for (String key : multimap.keySet()) {
+            result.put(key, Lists.newArrayList(multimap.get(key)));
+        }
+
+        return result;
+    }
+
+    @Override
+    public String getDisplayString(String[] strings) {
+        assert (strings.length == ARG_COUNT);
+        return "split_to_multimap(" + strings[0] + ", "
+                + strings[1] + ", " + strings[2] + ")";
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cc/shanruifeng/functions/url/UDFUrlDecode.java b/src/main/java/com/github/aaronshan/functions/url/UDFUrlDecode.java
similarity index 95%
rename from src/main/java/cc/shanruifeng/functions/url/UDFUrlDecode.java
rename to src/main/java/com/github/aaronshan/functions/url/UDFUrlDecode.java
index 21d1f2f..42b70fe 100644
--- a/src/main/java/cc/shanruifeng/functions/url/UDFUrlDecode.java
+++ b/src/main/java/com/github/aaronshan/functions/url/UDFUrlDecode.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.url;
+package com.github.aaronshan.functions.url;
 
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
diff --git a/src/main/java/cc/shanruifeng/functions/url/UDFUrlEncode.java b/src/main/java/com/github/aaronshan/functions/url/UDFUrlEncode.java
similarity index 96%
rename from src/main/java/cc/shanruifeng/functions/url/UDFUrlEncode.java
rename to src/main/java/com/github/aaronshan/functions/url/UDFUrlEncode.java
index 7c8a876..bae9d7f 100644
--- a/src/main/java/cc/shanruifeng/functions/url/UDFUrlEncode.java
+++ b/src/main/java/com/github/aaronshan/functions/url/UDFUrlEncode.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.url;
+package com.github.aaronshan.functions.url;
 
 import com.google.common.escape.Escaper;
 import com.google.common.net.UrlEscapers;
diff --git a/src/main/java/cc/shanruifeng/functions/utils/ArrayUtils.java b/src/main/java/com/github/aaronshan/functions/utils/ArrayUtils.java
similarity index 92%
rename from src/main/java/cc/shanruifeng/functions/utils/ArrayUtils.java
rename to src/main/java/com/github/aaronshan/functions/utils/ArrayUtils.java
index e04f3b3..9a31194 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/ArrayUtils.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/ArrayUtils.java
@@ -1,7 +1,7 @@
-package cc.shanruifeng.functions.utils;
+package com.github.aaronshan.functions.utils;
 
-import cc.shanruifeng.functions.fastuitl.ints.AbstractIntComparator;
-import cc.shanruifeng.functions.fastuitl.ints.IntComparator;
+import com.github.aaronshan.functions.fastuitl.ints.AbstractIntComparator;
+import com.github.aaronshan.functions.fastuitl.ints.IntComparator;
 import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
diff --git a/src/main/java/cc/shanruifeng/functions/utils/CardUtils.java b/src/main/java/com/github/aaronshan/functions/utils/CardUtils.java
similarity index 97%
rename from src/main/java/cc/shanruifeng/functions/utils/CardUtils.java
rename to src/main/java/com/github/aaronshan/functions/utils/CardUtils.java
index 41c5d23..226a2fc 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/CardUtils.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/CardUtils.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.utils;
+package com.github.aaronshan.functions.utils;
 
-import cc.shanruifeng.functions.model.ChinaIdArea;
+import com.github.aaronshan.functions.model.ChinaIdArea;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.base.Strings;
diff --git a/src/main/java/cc/shanruifeng/functions/utils/ConfigUtils.java b/src/main/java/com/github/aaronshan/functions/utils/ConfigUtils.java
similarity index 96%
rename from src/main/java/cc/shanruifeng/functions/utils/ConfigUtils.java
rename to src/main/java/com/github/aaronshan/functions/utils/ConfigUtils.java
index 6dfca16..5eb7b9e 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/ConfigUtils.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/ConfigUtils.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.utils;
+package com.github.aaronshan.functions.utils;
 
-import cc.shanruifeng.functions.model.ChinaIdArea;
+import com.github.aaronshan.functions.model.ChinaIdArea;
 import com.google.common.base.Strings;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
diff --git a/src/main/java/com/github/aaronshan/functions/utils/Failures.java b/src/main/java/com/github/aaronshan/functions/utils/Failures.java
new file mode 100644
index 0000000..6437bea
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/utils/Failures.java
@@ -0,0 +1,16 @@
+package com.github.aaronshan.functions.utils;
+
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+
+import static com.google.common.collect.Sets.newIdentityHashSet;
+import static java.lang.String.format;
+
+public class Failures {
+    private Failures() {}
+
+    public static void checkCondition(boolean condition, String formatString, Object... args) throws HiveException {
+        if (!condition) {
+            throw new HiveException(format(formatString, args));
+        }
+    }
+}
diff --git a/src/main/java/cc/shanruifeng/functions/utils/GeoUtils.java b/src/main/java/com/github/aaronshan/functions/utils/GeoUtils.java
similarity index 99%
rename from src/main/java/cc/shanruifeng/functions/utils/GeoUtils.java
rename to src/main/java/com/github/aaronshan/functions/utils/GeoUtils.java
index a499e6f..951efdd 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/GeoUtils.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/GeoUtils.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.utils;
+package com.github.aaronshan.functions.utils;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
diff --git a/src/main/java/cc/shanruifeng/functions/utils/MapUtils.java b/src/main/java/com/github/aaronshan/functions/utils/MapUtils.java
similarity index 96%
rename from src/main/java/cc/shanruifeng/functions/utils/MapUtils.java
rename to src/main/java/com/github/aaronshan/functions/utils/MapUtils.java
index b8f2320..1b8caf6 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/MapUtils.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/MapUtils.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.utils;
+package com.github.aaronshan.functions.utils;
 
 import java.util.Map;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
diff --git a/src/main/java/com/github/aaronshan/functions/utils/MathUtils.java b/src/main/java/com/github/aaronshan/functions/utils/MathUtils.java
new file mode 100644
index 0000000..4adb505
--- /dev/null
+++ b/src/main/java/com/github/aaronshan/functions/utils/MathUtils.java
@@ -0,0 +1,14 @@
+package com.github.aaronshan.functions.utils;
+
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+
+import static com.github.aaronshan.functions.utils.Failures.checkCondition;
+import static java.lang.Character.MAX_RADIX;
+import static java.lang.Character.MIN_RADIX;
+
+public class MathUtils {
+    public static void checkRadix(long radix) throws HiveException {
+        checkCondition(radix >= MIN_RADIX && radix <= MAX_RADIX, "Radix must be between %d and %d", MIN_RADIX, MAX_RADIX);
+    }
+
+}
diff --git a/src/main/java/cc/shanruifeng/functions/utils/json/JsonExtract.java b/src/main/java/com/github/aaronshan/functions/utils/json/JsonExtract.java
similarity index 99%
rename from src/main/java/cc/shanruifeng/functions/utils/json/JsonExtract.java
rename to src/main/java/com/github/aaronshan/functions/utils/json/JsonExtract.java
index 3dbb603..c04bd32 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/json/JsonExtract.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/json/JsonExtract.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.utils.json;
+package com.github.aaronshan.functions.utils.json;
 
 import com.fasterxml.jackson.core.*;
 import com.fasterxml.jackson.core.io.SerializedString;
diff --git a/src/main/java/cc/shanruifeng/functions/utils/json/JsonPath.java b/src/main/java/com/github/aaronshan/functions/utils/json/JsonPath.java
similarity index 95%
rename from src/main/java/cc/shanruifeng/functions/utils/json/JsonPath.java
rename to src/main/java/com/github/aaronshan/functions/utils/json/JsonPath.java
index 70a09ce..43f8073 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/json/JsonPath.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/json/JsonPath.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.utils.json;
+package com.github.aaronshan.functions.utils.json;
 
 /**
  * @author ruifeng.shan
diff --git a/src/main/java/cc/shanruifeng/functions/utils/json/JsonPathTokenizer.java b/src/main/java/com/github/aaronshan/functions/utils/json/JsonPathTokenizer.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/utils/json/JsonPathTokenizer.java
rename to src/main/java/com/github/aaronshan/functions/utils/json/JsonPathTokenizer.java
index c150594..4be89ed 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/json/JsonPathTokenizer.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/json/JsonPathTokenizer.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.utils.json;
+package com.github.aaronshan.functions.utils.json;
 
 import com.google.common.collect.AbstractIterator;
 
diff --git a/src/main/java/cc/shanruifeng/functions/utils/json/JsonUtils.java b/src/main/java/com/github/aaronshan/functions/utils/json/JsonUtils.java
similarity index 98%
rename from src/main/java/cc/shanruifeng/functions/utils/json/JsonUtils.java
rename to src/main/java/com/github/aaronshan/functions/utils/json/JsonUtils.java
index 9031319..633a089 100644
--- a/src/main/java/cc/shanruifeng/functions/utils/json/JsonUtils.java
+++ b/src/main/java/com/github/aaronshan/functions/utils/json/JsonUtils.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.utils.json;
+package com.github.aaronshan.functions.utils.json;
 
 
 import com.fasterxml.jackson.core.JsonFactory;
diff --git a/src/main/resources/china_day_type.config b/src/main/resources/china_day_type.config
index 8ae306a..bae8705 100644
--- a/src/main/resources/china_day_type.config
+++ b/src/main/resources/china_day_type.config
@@ -199,4 +199,35 @@
 2018-10-04	holiday
 2018-10-05	holiday
 2018-10-06	holiday
-2018-10-07	holiday
\ No newline at end of file
+2018-10-07	holiday
+2018-12-29	workday
+2018-12-30	holiday
+2018-12-31	holiday
+2019-01-01	holiday
+2019-02-02	workday
+2019-02-03	workday
+2019-02-04	holiday
+2019-02-05	holiday
+2019-02-06	holiday
+2019-02-07	holiday
+2019-02-08	holiday
+2019-02-09	holiday
+2019-02-10	holiday
+2019-04-05	holiday
+2019-04-06	holiday
+2019-04-07	holiday
+2019-05-01	holiday
+2019-06-07	holiday
+2019-06-08	holiday
+2019-06-09	holiday
+2019-09-13	holiday
+2019-09-14	holiday
+2019-09-15	holiday
+2019-09-29	workday
+2019-10-01	holiday
+2019-10-02	holiday
+2019-10-03	holiday
+2019-10-04	holiday
+2019-10-05	holiday
+2019-10-06	holiday
+2019-10-07	holiday
\ No newline at end of file
diff --git a/src/test/java/cc/shanruifeng/functions/array/UDFArrayContainsTest.java b/src/test/java/com/github/aaronshan/functions/array/UDFArrayContainsTest.java
similarity index 97%
rename from src/test/java/cc/shanruifeng/functions/array/UDFArrayContainsTest.java
rename to src/test/java/com/github/aaronshan/functions/array/UDFArrayContainsTest.java
index ac9de3e..a5efc4b 100644
--- a/src/test/java/cc/shanruifeng/functions/array/UDFArrayContainsTest.java
+++ b/src/test/java/com/github/aaronshan/functions/array/UDFArrayContainsTest.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import com.google.common.collect.ImmutableList;
 import java.util.List;
diff --git a/src/test/java/cc/shanruifeng/functions/array/UDFArrayIntersectTest.java b/src/test/java/com/github/aaronshan/functions/array/UDFArrayIntersectTest.java
similarity index 97%
rename from src/test/java/cc/shanruifeng/functions/array/UDFArrayIntersectTest.java
rename to src/test/java/com/github/aaronshan/functions/array/UDFArrayIntersectTest.java
index 639384a..37c1143 100644
--- a/src/test/java/cc/shanruifeng/functions/array/UDFArrayIntersectTest.java
+++ b/src/test/java/com/github/aaronshan/functions/array/UDFArrayIntersectTest.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.array;
+package com.github.aaronshan.functions.array;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Iterables;
diff --git a/src/test/java/com/github/aaronshan/functions/array/UDFArrayShuffleTest.java b/src/test/java/com/github/aaronshan/functions/array/UDFArrayShuffleTest.java
new file mode 100644
index 0000000..0f8a654
--- /dev/null
+++ b/src/test/java/com/github/aaronshan/functions/array/UDFArrayShuffleTest.java
@@ -0,0 +1,33 @@
+package com.github.aaronshan.functions.array;
+
+import com.github.aaronshan.functions.array.UDFArrayShuffle;
+import com.google.common.collect.ImmutableList;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+import org.junit.Test;
+
+import java.util.List;
+
+/**
+ * @author aaronshan
+ * @date 2018-08-18 上午8:59
+ */
+public class UDFArrayShuffleTest {
+    @Test
+    public void testArrayShuffle() throws HiveException {
+        UDFArrayShuffle udf = new UDFArrayShuffle();
+
+        ObjectInspector arrayOI = ObjectInspectorFactory.getStandardListObjectInspector(PrimitiveObjectInspectorFactory.javaIntObjectInspector);
+        ObjectInspector[] arguments = {arrayOI};
+
+        udf.initialize(arguments);
+
+        List<Integer> array = ImmutableList.of(1,2,5,6);
+        GenericUDF.DeferredObject arrayObj = new GenericUDF.DeferredJavaObject(array);
+        GenericUDF.DeferredObject[] args = {arrayObj};
+        System.out.println(udf.evaluate(args));
+    }
+}
diff --git a/src/test/java/com/github/aaronshan/functions/array/UDFArrayValueCountTest.java b/src/test/java/com/github/aaronshan/functions/array/UDFArrayValueCountTest.java
new file mode 100644
index 0000000..41c1acb
--- /dev/null
+++ b/src/test/java/com/github/aaronshan/functions/array/UDFArrayValueCountTest.java
@@ -0,0 +1,39 @@
+package com.github.aaronshan.functions.array;
+
+import com.google.common.collect.ImmutableList;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+import org.apache.hadoop.io.BooleanWritable;
+import org.apache.hadoop.io.LongWritable;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+public class UDFArrayValueCountTest {
+    @Test
+    public void testArrayValueCount() throws Exception {
+        UDFArrayValueCount udf = new UDFArrayValueCount();
+
+        ObjectInspector arrayOI = ObjectInspectorFactory.getStandardListObjectInspector(PrimitiveObjectInspectorFactory.javaStringObjectInspector);
+        ObjectInspector valueOI = PrimitiveObjectInspectorFactory.javaStringObjectInspector;
+        ObjectInspector[] arguments = {arrayOI, valueOI};
+
+        udf.initialize(arguments);
+        List<String> array = ImmutableList.of("a", "b", "c", "a");
+        GenericUDF.DeferredObject arrayObj = new GenericUDF.DeferredJavaObject(array);
+        GenericUDF.DeferredObject valueObj = new GenericUDF.DeferredJavaObject("a");
+        GenericUDF.DeferredObject[] args = {arrayObj, valueObj};
+        LongWritable output = (LongWritable) udf.evaluate(args);
+
+        assertEquals("array_value_count() test", new LongWritable(2).get(), output.get());
+
+        // Try with null args
+        GenericUDF.DeferredObject[] nullArgs = { new GenericUDF.DeferredJavaObject(null), new GenericUDF.DeferredJavaObject(null) };
+        output = (LongWritable) udf.evaluate(nullArgs);
+        assertEquals("array_value_count() test", new LongWritable(0).get(), output.get());
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/cc/shanruifeng/functions/bitwise/UDFBitCountTest.java b/src/test/java/com/github/aaronshan/functions/bitwise/UDFBitCountTest.java
similarity index 95%
rename from src/test/java/cc/shanruifeng/functions/bitwise/UDFBitCountTest.java
rename to src/test/java/com/github/aaronshan/functions/bitwise/UDFBitCountTest.java
index d064cba..c344a33 100644
--- a/src/test/java/cc/shanruifeng/functions/bitwise/UDFBitCountTest.java
+++ b/src/test/java/com/github/aaronshan/functions/bitwise/UDFBitCountTest.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.bitwise;
+package com.github.aaronshan.functions.bitwise;
 
 import org.apache.hadoop.hive.ql.metadata.HiveException;
 import org.apache.hadoop.io.LongWritable;
diff --git a/src/test/java/cc/shanruifeng/functions/date/UDFDayOfYearTest.java b/src/test/java/com/github/aaronshan/functions/date/UDFDayOfYearTest.java
similarity index 94%
rename from src/test/java/cc/shanruifeng/functions/date/UDFDayOfYearTest.java
rename to src/test/java/com/github/aaronshan/functions/date/UDFDayOfYearTest.java
index cc35d19..d70cdd6 100644
--- a/src/test/java/cc/shanruifeng/functions/date/UDFDayOfYearTest.java
+++ b/src/test/java/com/github/aaronshan/functions/date/UDFDayOfYearTest.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.date;
+package com.github.aaronshan.functions.date;
 
 import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.io.Text;
diff --git a/src/test/java/cc/shanruifeng/functions/geo/UDFGeoBdToGcjTest.java b/src/test/java/com/github/aaronshan/functions/geo/UDFGeoBdToGcjTest.java
similarity index 93%
rename from src/test/java/cc/shanruifeng/functions/geo/UDFGeoBdToGcjTest.java
rename to src/test/java/com/github/aaronshan/functions/geo/UDFGeoBdToGcjTest.java
index 2e9fec3..a720e53 100644
--- a/src/test/java/cc/shanruifeng/functions/geo/UDFGeoBdToGcjTest.java
+++ b/src/test/java/com/github/aaronshan/functions/geo/UDFGeoBdToGcjTest.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.geo;
+package com.github.aaronshan.functions.geo;
 
 import org.apache.hadoop.io.Text;
 import org.junit.Assert;
diff --git a/src/test/java/cc/shanruifeng/functions/map/UDFMapBuildTest.java b/src/test/java/com/github/aaronshan/functions/map/UDFMapBuildTest.java
similarity index 87%
rename from src/test/java/cc/shanruifeng/functions/map/UDFMapBuildTest.java
rename to src/test/java/com/github/aaronshan/functions/map/UDFMapBuildTest.java
index 630635e..0fc2ed6 100644
--- a/src/test/java/cc/shanruifeng/functions/map/UDFMapBuildTest.java
+++ b/src/test/java/com/github/aaronshan/functions/map/UDFMapBuildTest.java
@@ -1,6 +1,7 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
-import cc.shanruifeng.functions.utils.MapUtils;
+import com.github.aaronshan.functions.utils.MapUtils;
+import com.github.aaronshan.functions.utils.MapUtils;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
@@ -11,6 +12,7 @@
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
 import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+import org.junit.Assert;
 import org.junit.Test;
 
 import static org.junit.Assert.*;
@@ -38,6 +40,6 @@ public void testMapBuild() throws Exception {
         LinkedHashMap<String, String> expect = Maps.newLinkedHashMap();
         expect.putAll(ImmutableMap.<String, String>of("key1", "value1", "key2", "value2", "key3", "value3"));
 
-        assertEquals("map_build() test", true, MapUtils.mapEquals(output, expect));
+        Assert.assertEquals("map_build() test", true, MapUtils.mapEquals(output, expect));
     }
 }
\ No newline at end of file
diff --git a/src/test/java/cc/shanruifeng/functions/map/UDFMapConcatTest.java b/src/test/java/com/github/aaronshan/functions/map/UDFMapConcatTest.java
similarity index 88%
rename from src/test/java/cc/shanruifeng/functions/map/UDFMapConcatTest.java
rename to src/test/java/com/github/aaronshan/functions/map/UDFMapConcatTest.java
index e9fcc1b..0094f43 100644
--- a/src/test/java/cc/shanruifeng/functions/map/UDFMapConcatTest.java
+++ b/src/test/java/com/github/aaronshan/functions/map/UDFMapConcatTest.java
@@ -1,6 +1,7 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
-import cc.shanruifeng.functions.utils.MapUtils;
+import com.github.aaronshan.functions.utils.MapUtils;
+import com.github.aaronshan.functions.utils.MapUtils;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
 import java.util.LinkedHashMap;
@@ -9,6 +10,7 @@
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
 import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
 import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+import org.junit.Assert;
 import org.junit.Test;
 
 import static org.junit.Assert.*;
@@ -39,6 +41,6 @@ public void testMapConcat() throws Exception {
         LinkedHashMap<String, String> expect = Maps.newLinkedHashMap();
         expect.putAll(ImmutableMap.<String, String>of("key1", "11", "key2", "12", "key3", "21", "key4", "22", "key5", "23"));
 
-        assertEquals("map_concat() test", true, MapUtils.mapEquals(output, expect));
+        Assert.assertEquals("map_concat() test", true, MapUtils.mapEquals(output, expect));
     }
 }
\ No newline at end of file
diff --git a/src/test/java/cc/shanruifeng/functions/map/UDFMapElementAtTest.java b/src/test/java/com/github/aaronshan/functions/map/UDFMapElementAtTest.java
similarity index 94%
rename from src/test/java/cc/shanruifeng/functions/map/UDFMapElementAtTest.java
rename to src/test/java/com/github/aaronshan/functions/map/UDFMapElementAtTest.java
index d542414..b98259d 100644
--- a/src/test/java/cc/shanruifeng/functions/map/UDFMapElementAtTest.java
+++ b/src/test/java/com/github/aaronshan/functions/map/UDFMapElementAtTest.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
-import cc.shanruifeng.functions.utils.MapUtils;
+import com.github.aaronshan.functions.utils.MapUtils;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
diff --git a/src/test/java/cc/shanruifeng/functions/map/UDFMapEqualsTest.java b/src/test/java/com/github/aaronshan/functions/map/UDFMapEqualsTest.java
similarity index 96%
rename from src/test/java/cc/shanruifeng/functions/map/UDFMapEqualsTest.java
rename to src/test/java/com/github/aaronshan/functions/map/UDFMapEqualsTest.java
index 3c841a1..af8917f 100644
--- a/src/test/java/cc/shanruifeng/functions/map/UDFMapEqualsTest.java
+++ b/src/test/java/com/github/aaronshan/functions/map/UDFMapEqualsTest.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.map;
+package com.github.aaronshan.functions.map;
 
-import cc.shanruifeng.functions.utils.MapUtils;
+import com.github.aaronshan.functions.utils.MapUtils;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
 import java.util.LinkedHashMap;
diff --git a/src/test/java/com/github/aaronshan/functions/math/UDFMathCosineSimilarityTest.java b/src/test/java/com/github/aaronshan/functions/math/UDFMathCosineSimilarityTest.java
new file mode 100644
index 0000000..ecff4ea
--- /dev/null
+++ b/src/test/java/com/github/aaronshan/functions/math/UDFMathCosineSimilarityTest.java
@@ -0,0 +1,51 @@
+package com.github.aaronshan.functions.math;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.apache.hadoop.hive.serde2.io.DoubleWritable;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+import org.junit.Test;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import static org.junit.Assert.*;
+
+public class UDFMathCosineSimilarityTest {
+
+    @Test
+    public void testCosineSimilarity() throws HiveException {
+        Double result = getResult(ImmutableMap.<String, Double>of("a", 1.0, "b", 2.0), ImmutableMap.<String, Double>of("c", 1.0, "b", 3.0));
+        assertEquals(result, 2 * 3 / (Math.sqrt(5) * Math.sqrt(10)), 0.0);
+        result = getResult(ImmutableMap.<String, Double>of("a", 1.0, "b", 2.0, "c", -1.0), ImmutableMap.<String, Double>of("c", 1.0, "b", 3.0));
+        assertEquals(result, (2 * 3 + (-1) * 1) / (Math.sqrt(1 + 4 + 1) * Math.sqrt(1 + 9)), 0.0);
+        result = getResult(ImmutableMap.<String, Double>of("a", 1.0, "b", 2.0, "c", -1.0), ImmutableMap.<String, Double>of("d", 1.0, "e", 3.0));
+        assertEquals(result, 0.0, 0.0);
+        result = getResult(null, ImmutableMap.<String, Double>of("c", 1.0, "b", 3.0));
+        assertEquals(result, null);
+        LinkedHashMap<String, Double> leftMap = Maps.newLinkedHashMap();
+        leftMap.put("a", 1.0);
+        leftMap.put("b", null);
+        result = getResult(leftMap, ImmutableMap.<String, Double>of("c", 1.0, "b", 3.0));
+        assertEquals(result, null);
+    }
+
+    public Double getResult(Map<String, Double> leftMap, Map<String, Double> rightMap) throws HiveException {
+        UDFMathCosineSimilarity udf = new UDFMathCosineSimilarity();
+
+        ObjectInspector leftMapOI = ObjectInspectorFactory.getStandardMapObjectInspector(PrimitiveObjectInspectorFactory.javaStringObjectInspector, PrimitiveObjectInspectorFactory.javaDoubleObjectInspector);
+        ObjectInspector rightMapOI = ObjectInspectorFactory.getStandardMapObjectInspector(PrimitiveObjectInspectorFactory.javaStringObjectInspector, PrimitiveObjectInspectorFactory.javaDoubleObjectInspector);
+        ObjectInspector[] arguments = {leftMapOI, rightMapOI};
+        udf.initialize(arguments);
+
+        GenericUDF.DeferredObject leftMapObj = new GenericUDF.DeferredJavaObject(leftMap);
+        GenericUDF.DeferredObject rightMapObj = new GenericUDF.DeferredJavaObject(rightMap);
+        GenericUDF.DeferredObject[] args = {leftMapObj, rightMapObj};
+        DoubleWritable output = (DoubleWritable) udf.evaluate(args);
+        return output == null ? null : output.get();
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/com/github/aaronshan/functions/string/UDFStringSplitToMapTest.java b/src/test/java/com/github/aaronshan/functions/string/UDFStringSplitToMapTest.java
new file mode 100644
index 0000000..a1e82e6
--- /dev/null
+++ b/src/test/java/com/github/aaronshan/functions/string/UDFStringSplitToMapTest.java
@@ -0,0 +1,29 @@
+package com.github.aaronshan.functions.string;
+
+import com.github.aaronshan.functions.utils.MapUtils;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+
+public class UDFStringSplitToMapTest {
+    @Test
+    public void testStringSplitToMap() throws Exception {
+        UDFStringSplitToMap udf = new UDFStringSplitToMap();
+
+        GenericUDF.DeferredObject string = new GenericUDF.DeferredJavaObject("a=123,b=0.4");
+        GenericUDF.DeferredObject entryDelimiter = new GenericUDF.DeferredJavaObject(",");
+        GenericUDF.DeferredObject keyValueDelimiter = new GenericUDF.DeferredJavaObject("=");
+        GenericUDF.DeferredObject[] args = {string, entryDelimiter, keyValueDelimiter};
+
+        HashMap<String, String> output = (HashMap<String, String>) udf.evaluate(args);
+
+        HashMap<String, String> expect = Maps.newHashMap();
+        expect.putAll(ImmutableMap.<String, String>of("a", "123", "b", "0.4"));
+
+        Assert.assertEquals("split_to_map() test", true, MapUtils.mapEquals(output, expect));
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/com/github/aaronshan/functions/string/UDFStringSplitToMultimapTest.java b/src/test/java/com/github/aaronshan/functions/string/UDFStringSplitToMultimapTest.java
new file mode 100644
index 0000000..d7fe5fd
--- /dev/null
+++ b/src/test/java/com/github/aaronshan/functions/string/UDFStringSplitToMultimapTest.java
@@ -0,0 +1,31 @@
+package com.github.aaronshan.functions.string;
+
+import com.github.aaronshan.functions.utils.MapUtils;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.List;
+
+public class UDFStringSplitToMultimapTest {
+    @Test
+    public void testStringSplitToMultimap() throws Exception {
+        UDFStringSplitToMultimap udf = new UDFStringSplitToMultimap();
+
+        GenericUDF.DeferredObject string = new GenericUDF.DeferredJavaObject("a=123,b=0.4,a=124");
+        GenericUDF.DeferredObject entryDelimiter = new GenericUDF.DeferredJavaObject(",");
+        GenericUDF.DeferredObject keyValueDelimiter = new GenericUDF.DeferredJavaObject("=");
+        GenericUDF.DeferredObject[] args = {string, entryDelimiter, keyValueDelimiter};
+
+        HashMap<String, List<String>> output = (HashMap<String, List<String>>) udf.evaluate(args);
+
+        HashMap<String, List<String>> expect = Maps.newHashMap();
+        expect.putAll(ImmutableMap.<String, List<String>>of("a", ImmutableList.<String>of("123", "124"), "b", ImmutableList.<String>of("0.4")));
+
+        Assert.assertEquals("split_to_multimap() test", true, MapUtils.mapEquals(output, expect));
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/cc/shanruifeng/functions/url/UDFUrlDecodeTest.java b/src/test/java/com/github/aaronshan/functions/url/UDFUrlDecodeTest.java
similarity index 94%
rename from src/test/java/cc/shanruifeng/functions/url/UDFUrlDecodeTest.java
rename to src/test/java/com/github/aaronshan/functions/url/UDFUrlDecodeTest.java
index 56cd312..a771cd1 100644
--- a/src/test/java/cc/shanruifeng/functions/url/UDFUrlDecodeTest.java
+++ b/src/test/java/com/github/aaronshan/functions/url/UDFUrlDecodeTest.java
@@ -1,4 +1,4 @@
-package cc.shanruifeng.functions.url;
+package com.github.aaronshan.functions.url;
 
 import org.apache.hadoop.io.Text;
 import org.junit.Assert;
diff --git a/src/test/java/cc/shanruifeng/functions/url/UDFUrlEncodeTest.java b/src/test/java/com/github/aaronshan/functions/url/UDFUrlEncodeTest.java
similarity index 87%
rename from src/test/java/cc/shanruifeng/functions/url/UDFUrlEncodeTest.java
rename to src/test/java/com/github/aaronshan/functions/url/UDFUrlEncodeTest.java
index a7c894d..3cec438 100644
--- a/src/test/java/cc/shanruifeng/functions/url/UDFUrlEncodeTest.java
+++ b/src/test/java/com/github/aaronshan/functions/url/UDFUrlEncodeTest.java
@@ -1,6 +1,6 @@
-package cc.shanruifeng.functions.url;
+package com.github.aaronshan.functions.url;
 
-import cc.shanruifeng.functions.date.UDFDayOfYear;
+import com.github.aaronshan.functions.date.UDFDayOfYear;
 import org.apache.hadoop.io.Text;
 import org.junit.Assert;
 import org.junit.Test;