Package io.trino.operator.unnest

Interface Unnester

All Known Implementing Classes:

ArrayOfRowsUnnester, ArrayUnnester, MapUnnester

public interface Unnester

This is a layer of abstraction between UnnestOperator and UnnestBlockBuilder to enable translation of indices from input nested blocks to underlying element blocks.

Method Summary

Modifier and Type	Method	Description
Block[]	buildOutputBlocks(int[] outputEntriesPerPosition, int startPosition, int batchSize, int outputRowCount)	Build the output blocks for the current batch for this unnester.
int	getChannelCount()
int[]	getOutputEntriesPerPosition()	Return a vector with the number of entries for each position of the block to be unnested.
long	getRetainedSizeInBytes()
void	resetInput(Block block)

Method Details

getChannelCount

int getChannelCount()

resetInput

void resetInput(Block block)

getOutputEntriesPerPosition

int[] getOutputEntriesPerPosition()

Return a vector with the number of entries for each position of the block to be unnested.

buildOutputBlocks

Block[] buildOutputBlocks(int[] outputEntriesPerPosition,
 int startPosition,
 int batchSize,
 int outputRowCount)

Build the output blocks for the current batch for this unnester.

Parameters:

outputEntriesPerPosition - A vector that holds the max unnested row count for each position of all blocks to be unnested.

startPosition - The start input position of this batch.

batchSize - The number of input rows to be processed in this batch.

outputRowCount - The total output row count for this batch after the unnest is done.

getRetainedSizeInBytes

long getRetainedSizeInBytes()