org.eigenbase.rel.rules
Class ReduceDecimalsRule.CastArgAsTypeExpander

java.lang.Object
  org.eigenbase.rel.rules.ReduceDecimalsRule.RexExpander
      org.eigenbase.rel.rules.ReduceDecimalsRule.CastArgAsTypeExpander

Direct Known Subclasses:

ReduceDecimalsRule.CastArgAsDoubleExpander, ReduceDecimalsRule.CastArgAsReturnExpander

Enclosing class:

ReduceDecimalsRule

private abstract class ReduceDecimalsRule.CastArgAsTypeExpander
extends ReduceDecimalsRule.RexExpander

An expander which casts decimal arguments as another type

Field Summary

Fields inherited from class org.eigenbase.rel.rules.ReduceDecimalsRule.RexExpander

builder, int8, real8

Constructor Summary

private

ReduceDecimalsRule.CastArgAsTypeExpander(RexBuilder builder)

Method Summary

RexNode	expand(RexCall call) Rewrites an expression containing decimals.
abstract RelDataType	getArgType(RexCall call, int ordinal)

Methods inherited from class org.eigenbase.rel.rules.ReduceDecimalsRule.RexExpander

accessValue, canExpand, decodeValue, encodeValue, encodeValue, ensureScale, ensureType, ensureType, makeApproxLiteral, makeApproxScaleFactor, makeCase, makeCase, makeDivide, makeExactLiteral, makeIsNegative, makeIsPositive, makeMinus, makeMultiply, makePlus, makeRoundFactor, makeScaleFactor, matchNullability, powerOfTen, scaleDown, scaleDownDouble, scaleUp

Methods inherited from class java.lang.Object

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

Constructor Detail

ReduceDecimalsRule.CastArgAsTypeExpander

private ReduceDecimalsRule.CastArgAsTypeExpander(RexBuilder builder)

Method Detail

getArgType

public abstract RelDataType getArgType(RexCall call,
                                       int ordinal)

expand

public RexNode expand(RexCall call)

Description copied from class: ReduceDecimalsRule.RexExpander

Rewrites an expression containing decimals. Normally, this method always performs a rewrite, but implementations may choose to return the original expression if no change was required.

Specified by:

expand in class ReduceDecimalsRule.RexExpander