org.eigenbase.rel.rules
Class ReduceDecimalsRule.BinaryArithmeticExpander

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

Enclosing class:

ReduceDecimalsRule

private class ReduceDecimalsRule.BinaryArithmeticExpander
extends ReduceDecimalsRule.RexExpander

Expands a decimal arithmetic expression

Field Summary

(package private) int	scaleA
(package private) int	scaleB
(package private) RelDataType	typeA
(package private) RelDataType	typeB

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

builder, int8, real8

Constructor Summary

private

ReduceDecimalsRule.BinaryArithmeticExpander(RexBuilder builder)

Method Summary

private void	analyzeOperands(RexNode[] operands) Convenience method for reading characteristics of operands (such as scale, precision, whole digits) into an ArithmeticExpander.
RexNode	expand(RexCall call) Rewrites an expression containing decimals.
private RexNode	expandComparison(RexCall call, RexNode[] operands)
private RexNode	expandDivide(RexCall call, RexNode[] operands)
private RexNode	expandMod(RexCall call, RexNode[] operands)
private RexNode	expandPlusMinus(RexCall call, RexNode[] operands)
private RexNode	expandTimes(RexCall call, RexNode[] operands)

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

Field Detail

typeA

RelDataType typeA

typeB

RelDataType typeB

scaleA

int scaleA

scaleB

int scaleB

Constructor Detail

ReduceDecimalsRule.BinaryArithmeticExpander

private ReduceDecimalsRule.BinaryArithmeticExpander(RexBuilder builder)

Method Detail

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

analyzeOperands

private void analyzeOperands(RexNode[] operands)

Convenience method for reading characteristics of operands (such as scale, precision, whole digits) into an ArithmeticExpander. The operands are restricted by the following contraints:

• there are exactly two operands
• both are exact numeric types

expandPlusMinus

private RexNode expandPlusMinus(RexCall call,
                                RexNode[] operands)

expandDivide

private RexNode expandDivide(RexCall call,
                             RexNode[] operands)

expandTimes

private RexNode expandTimes(RexCall call,
                            RexNode[] operands)

expandComparison

private RexNode expandComparison(RexCall call,
                                 RexNode[] operands)

expandMod

private RexNode expandMod(RexCall call,
                          RexNode[] operands)