HIVE-4123 Improved ORC integer RLE version 2. (Prasanth Jayachandran via

omalley)


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1513155 13f79535-47bb-0310-9956-ffa450edef68

common/src/java/org/apache/hadoop/hive/conf/HiveConf.java

@@ -502,6 +502,9 @@ public static enum ConfVars {
 
     // Maximum fraction of heap that can be used by ORC file writers
     HIVE_ORC_FILE_MEMORY_POOL("hive.exec.orc.memory.pool", 0.5f), // 50%
+    // use 0.11 version of RLE encoding. if this conf is not defined or any
+    // other value specified, ORC will use the new RLE encoding
+    HIVE_ORC_WRITE_FORMAT("hive.exec.orc.write.format", "0.11"),
 
     HIVE_ORC_DICTIONARY_KEY_SIZE_THRESHOLD("hive.exec.orc.dictionary.key.size.threshold", 0.8f),
 

ql/src/java/org/apache/hadoop/hive/ql/io/orc/IntegerReader.java

@@ -0,0 +1,55 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hive.ql.io.orc;
+
+import java.io.IOException;
+
+/**
+ * Interface for reading integers.
+ */
+interface IntegerReader {
+
+  /**
+   * Seek to the position provided by index.
+   * @param index
+   * @throws IOException
+   */
+  void seek(PositionProvider index) throws IOException;
+
+  /**
+   * Skip number of specified rows.
+   * @param numValues
+   * @throws IOException
+   */
+  void skip(long numValues) throws IOException;
+
+  /**
+   * Check if there are any more values left.
+   * @return
+   * @throws IOException
+   */
+  boolean hasNext() throws IOException;
+
+  /**
+   * Return the next available value.
+   * @return
+   * @throws IOException
+   */
+  long next() throws IOException;
+}

ql/src/java/org/apache/hadoop/hive/ql/io/orc/IntegerWriter.java

@@ -0,0 +1,47 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hive.ql.io.orc;
+
+import java.io.IOException;
+
+/**
+ * Interface for writing integers.
+ */
+interface IntegerWriter {
+
+  /**
+   * Get position from the stream.
+   * @param recorder
+   * @throws IOException
+   */
+  void getPosition(PositionRecorder recorder) throws IOException;
+
+  /**
+   * Write the integer value
+   * @param value
+   * @throws IOException
+   */
+  void write(long value) throws IOException;
+
+  /**
+   * Flush the buffer
+   * @throws IOException
+   */
+  void flush() throws IOException;
+}