[feat](metatable) support table$partitions for hive table #40774
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Thank you for your contribution to Apache Doris. Since 2024-03-18, the Document has been moved to doris-website. |
morningman
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run buildall |
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run buildall |
TPC-H: Total hot run time: 43230 ms |
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TeamCity be ut coverage result: |
TPC-DS: Total hot run time: 195876 ms |
ClickBench: Total hot run time: 30.8 s |
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run buildall |
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TeamCity be ut coverage result: |
TPC-H: Total hot run time: 42306 ms |
TPC-DS: Total hot run time: 198605 ms |
ClickBench: Total hot run time: 30.83 s |
morningman
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mysql> select * from multi_catalog.orc_partitioned_columns$partitions; here should return NULL for t_int |
done |
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run buildall |
TPC-H: Total hot run time: 41588 ms |
TPC-DS: Total hot run time: 199952 ms |
|
TeamCity be ut coverage result: |
ClickBench: Total hot run time: 33.42 s |
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run buildall |
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TeamCity be ut coverage result: |
TPC-H: Total hot run time: 41731 ms |
TPC-DS: Total hot run time: 195487 ms |
ClickBench: Total hot run time: 33.77 s |
morrySnow
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Support new grammar: `table_name$partitions`
User can query partition info by using:
```
select * from table_name$partitions
```
`table_name$partitions` is a special meta table corresponding to the
table.
Its schema is the partition columns of the table, and column type is
always "String".
And the value is the partition column's value
You can use `DESC table_name$partitions` to get schema:
```
mysql> desc partition_values_all_types$partitions;
+-------+----------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+----------------+------+------+---------+-------+
| p1 | boolean | Yes | true | NULL | NONE |
| p2 | tinyint | Yes | true | NULL | NONE |
| p3 | smallint | Yes | true | NULL | NONE |
| p4 | int | Yes | true | NULL | NONE |
| p5 | bigint | Yes | true | NULL | NONE |
| p6 | date | Yes | true | NULL | NONE |
| p7 | datetime(6) | Yes | true | NULL | NONE |
| p8 | varchar(65533) | Yes | true | NULL | NONE |
| p9 | decimal(9,2) | Yes | true | NULL | NONE |
| p10 | decimal(18,10) | Yes | true | NULL | NONE |
| p11 | decimal(38,9) | Yes | true | NULL | NONE |
+-------+----------------+------+------+---------+-------+
```
Where `px` are partition columns of table `partition_values_all_types`;
```
mysql> select * from partition_values_all_types$partitions order by p1,p2,p3;
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| p1 | p2 | p3 | p4 | p5 | p6 | p7 | p8 | p9 | p10 | p11 |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| 0 | -128 | -32768 | -2147483648 | -9223372036854775808 | 1900-01-01 | 1899-01-01 23:59:59.000000 | NULL | -9999999.99 | -99999999.9999999999 | -99999999999999999999999999999.999999999 |
| 0 | 127 | 32767 | 2147483647 | 9223372036854775807 | 9999-12-31 | 0001-01-01 00:00:01.321000 | boston | 9999999.99 | 99999999.9999999999 | 99999999999999999999999999999.999999999 |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
```
Currently, this grammar can only be used for partition table's in Hive
Catalog.
Table in other catalogs or non partition table can not use this grammar.
Internally, it is implemented as a table valued function:
`partition_values`
```
mysql> select * from partition_values("catalog" = "hive", "database" = "multi_catalog", "table" = "partition_values_all_types");
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| p1 | p2 | p3 | p4 | p5 | p6 | p7 | p8 | p9 | p10 | p11 |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| 0 | 127 | 32767 | 2147483647 | 9223372036854775807 | 9999-12-31 | 0001-01-01 00:00:01.321000 | boston | 9999999.99 | 99999999.9999999999 | 99999999999999999999999999999.999999999 |
| 0 | -128 | -32768 | -2147483648 | -9223372036854775808 | 1900-01-01 | 1899-01-01 23:59:59.000000 | NULL | -9999999.99 | -99999999.9999999999 | -99999999999999999999999999999.999999999 |
| NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
```
morningman
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dataroaring
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Support new grammar: `table_name$partitions`
User can query partition info by using:
```
select * from table_name$partitions
```
`table_name$partitions` is a special meta table corresponding to the
table.
Its schema is the partition columns of the table, and column type is
always "String".
And the value is the partition column's value
You can use `DESC table_name$partitions` to get schema:
```
mysql> desc partition_values_all_types$partitions;
+-------+----------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+----------------+------+------+---------+-------+
| p1 | boolean | Yes | true | NULL | NONE |
| p2 | tinyint | Yes | true | NULL | NONE |
| p3 | smallint | Yes | true | NULL | NONE |
| p4 | int | Yes | true | NULL | NONE |
| p5 | bigint | Yes | true | NULL | NONE |
| p6 | date | Yes | true | NULL | NONE |
| p7 | datetime(6) | Yes | true | NULL | NONE |
| p8 | varchar(65533) | Yes | true | NULL | NONE |
| p9 | decimal(9,2) | Yes | true | NULL | NONE |
| p10 | decimal(18,10) | Yes | true | NULL | NONE |
| p11 | decimal(38,9) | Yes | true | NULL | NONE |
+-------+----------------+------+------+---------+-------+
```
Where `px` are partition columns of table `partition_values_all_types`;
```
mysql> select * from partition_values_all_types$partitions order by p1,p2,p3;
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| p1 | p2 | p3 | p4 | p5 | p6 | p7 | p8 | p9 | p10 | p11 |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| 0 | -128 | -32768 | -2147483648 | -9223372036854775808 | 1900-01-01 | 1899-01-01 23:59:59.000000 | NULL | -9999999.99 | -99999999.9999999999 | -99999999999999999999999999999.999999999 |
| 0 | 127 | 32767 | 2147483647 | 9223372036854775807 | 9999-12-31 | 0001-01-01 00:00:01.321000 | boston | 9999999.99 | 99999999.9999999999 | 99999999999999999999999999999.999999999 |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
```
Currently, this grammar can only be used for partition table's in Hive
Catalog.
Table in other catalogs or non partition table can not use this grammar.
Internally, it is implemented as a table valued function:
`partition_values`
```
mysql> select * from partition_values("catalog" = "hive", "database" = "multi_catalog", "table" = "partition_values_all_types");
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| p1 | p2 | p3 | p4 | p5 | p6 | p7 | p8 | p9 | p10 | p11 |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
| 0 | 127 | 32767 | 2147483647 | 9223372036854775807 | 9999-12-31 | 0001-01-01 00:00:01.321000 | boston | 9999999.99 | 99999999.9999999999 | 99999999999999999999999999999.999999999 |
| 0 | -128 | -32768 | -2147483648 | -9223372036854775808 | 1900-01-01 | 1899-01-01 23:59:59.000000 | NULL | -9999999.99 | -99999999.9999999999 | -99999999999999999999999999999.999999999 |
| NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
+------+------+--------+-------------+----------------------+------------+----------------------------+--------+-------------+----------------------+------------------------------------------+
```
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Support new grammar:
table_name$partitionsUser can query partition info by using:
table_name$partitionsis a special meta table corresponding to the table.Its schema is the partition columns of the table, and column type is always "String".
And the value is the partition column's value
You can use
DESC table_name$partitionsto get schema:Where
pxare partition columns of tablepartition_values_all_types;Currently, this grammar can only be used for partition table's in Hive Catalog.
Table in other catalogs or non partition table can not use this grammar.
Internally, it is implemented as a table valued function:
partition_values