Package org.apache.drill.exec.store.parquet.columnreaders

Class VarLenOverflowReader

java.lang.Object

org.apache.drill.exec.store.parquet.columnreaders.VarLenOverflowReader

public final class VarLenOverflowReader
extends Object

This class is responsible for processing serialized overflow data (generated in a previous batch); this way overflow data becomes an input source and is thus a) efficiently re-loaded into the current batch ValueVector and b) subjected to the same batching constraints rules.

Field Summary

Fields

Modifier and Type	Field	Description
protected final ByteBuffer	buffer	byte buffer used for buffering page data
protected final org.apache.drill.exec.store.parquet.columnreaders.VarLenColumnBulkEntry	entry	Bulk entry

Method Summary

Modifier and Type	Method	Description
protected boolean	batchMemoryConstraintsReached(int newBitsMemory, int newOffsetsMemory, int newDataMemory)

Methods inherited from class java.lang.Object

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

Field Details

buffer

protected final ByteBuffer buffer

byte buffer used for buffering page data

entry

protected final org.apache.drill.exec.store.parquet.columnreaders.VarLenColumnBulkEntry entry

Bulk entry

Method Details

batchMemoryConstraintsReached

protected boolean batchMemoryConstraintsReached(int newBitsMemory,
 int newOffsetsMemory,
 int newDataMemory)

Parameters:

newBitsMemory - new "bits" memory size

newOffsetsMemory - new "offsets" memory size

newDataMemory - new "data" memory size

Returns:

true if the new payload ("bits", "offsets", "data") will trigger a constraint violation; false otherwise