org.apache.calcite.rex

Class RexExecutorImpl

java.lang.Object

org.apache.calcite.rex.RexExecutorImpl

All Implemented Interfaces:

RexExecutor

public class RexExecutorImpl
extends Object
implements RexExecutor

Evaluates a RexNode expression.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	RexExecutorImpl.DataContextInputGetter Implementation of RexToLixTranslator.InputGetter that reads the values of input fields by calling DataContext.get(java.lang.String)("inputRecord").

Field Summary

Fields

Modifier and Type	Field and Description
private DataContext	dataContext

Constructor Summary

Constructors

Constructor and Description
RexExecutorImpl(DataContext dataContext)

Method Summary

Modifier and Type	Method and Description
private String	compile(RexBuilder rexBuilder, List<RexNode> constExps, RexToLixTranslator.InputGetter getter)
private String	compile(RexBuilder rexBuilder, List<RexNode> constExps, RexToLixTranslator.InputGetter getter, RelDataType rowType)
RexExecutable	getExecutable(RexBuilder rexBuilder, List<RexNode> exps, RelDataType rowType) Creates an RexExecutable that allows to apply the generated code during query processing (filter, projection).
void	reduce(RexBuilder rexBuilder, List<RexNode> constExps, List<RexNode> reducedValues) Do constant reduction using generated code.

Methods inherited from class java.lang.Object

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

Field Detail

dataContext

private final DataContext dataContext

Constructor Detail

RexExecutorImpl

public RexExecutorImpl(DataContext dataContext)

Method Detail

compile

private String compile(RexBuilder rexBuilder,
                       List<RexNode> constExps,
                       RexToLixTranslator.InputGetter getter)

compile

private String compile(RexBuilder rexBuilder,
                       List<RexNode> constExps,
                       RexToLixTranslator.InputGetter getter,
                       RelDataType rowType)

getExecutable

public RexExecutable getExecutable(RexBuilder rexBuilder,
                                   List<RexNode> exps,
                                   RelDataType rowType)

Creates an RexExecutable that allows to apply the generated code during query processing (filter, projection).

Parameters:

rexBuilder - Rex builder

exps - Expressions

rowType - describes the structure of the input row.

reduce

public void reduce(RexBuilder rexBuilder,
                   List<RexNode> constExps,
                   List<RexNode> reducedValues)

Do constant reduction using generated code.

Specified by:

reduce in interface RexExecutor

Parameters:

rexBuilder - Rex builder

constExps - Expressions to be reduced

reducedValues - List to which reduced expressions are appended