com.facebook.presto.common.block

Class BlockFlattener

java.lang.Object

com.facebook.presto.common.block.BlockFlattener

public class BlockFlattener
extends Object

Constructor Summary

Constructors

Constructor and Description
BlockFlattener(ArrayAllocator allocator)

Method Summary

Modifier and Type	Method and Description
BlockLease	flatten(Block block) Flattens RunLengthEncodedBlock and DictionaryBlock into the top-level type such that the inner block is not itself a run length encoded block or dictionary block.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BlockFlattener

public BlockFlattener(ArrayAllocator allocator)

Method Detail

flatten

public BlockLease flatten(Block block)

Flattens RunLengthEncodedBlock and DictionaryBlock into the top-level type such that the inner block is not itself a run length encoded block or dictionary block. For example, a dictionary block which consists of another dictionary block would be flattened to just a dictionary block which has an inner data block of the child dictionary, with all of the ids remapped accordingly.