Package org.apache.pinot.query.runtime.operator

Class TransformOperator

java.lang.Object

org.apache.pinot.query.runtime.operator.MultiStageOperator

org.apache.pinot.query.runtime.operator.TransformOperator

All Implemented Interfaces:

AutoCloseable, Operator<TransferableBlock>

public class TransformOperator
extends MultiStageOperator

This basic TransformOperator implement basic transformations. This operator performs three kinds of transform - InputRef transform, which reads from certain input column based on column index - Literal transform, which outputs literal value - Function transform, which runs a function on function operands. Function operands and be any of 3 the transform. Note: Function transform only runs functions from v1 engine scalar function factory, which only does argument count and canonicalized function name matching (lower case).

Field Summary

Fields inherited from class org.apache.pinot.query.runtime.operator.MultiStageOperator

_context, _opChainStats, _operatorId

Constructor Summary

Constructors

Constructor	Description
TransformOperator(OpChainExecutionContext context, MultiStageOperator upstreamOperator, DataSchema resultSchema, List<RexExpression> transforms, DataSchema upstreamDataSchema)

Method Summary

Modifier and Type	Method	Description
List<MultiStageOperator>	getChildOperators()
protected TransferableBlock	getNextBlock()
String	toExplainString()

Methods inherited from class org.apache.pinot.query.runtime.operator.MultiStageOperator

cancel, close, getOperatorId, nextBlock, shouldCollectStats

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.pinot.core.common.Operator

explainPlan, getExecutionStatistics, getIndexSegment, prepareForExplainPlan

Constructor Detail

TransformOperator

public TransformOperator(OpChainExecutionContext context,
                         MultiStageOperator upstreamOperator,
                         DataSchema resultSchema,
                         List<RexExpression> transforms,
                         DataSchema upstreamDataSchema)

Method Detail

getChildOperators

public List<MultiStageOperator> getChildOperators()

Specified by:

getChildOperators in interface Operator<TransferableBlock>

Overrides:

getChildOperators in class MultiStageOperator

toExplainString

@Nullable
public String toExplainString()

getNextBlock

protected TransferableBlock getNextBlock()

Specified by:

getNextBlock in class MultiStageOperator