Package org.apache.calcite.rel.rules

Class ReduceDecimalsRule.DecimalShuttle

java.lang.Object

org.apache.calcite.rex.RexShuttle

org.apache.calcite.rel.rules.ReduceDecimalsRule.DecimalShuttle

All Implemented Interfaces:

RexVisitor<RexNode>

Enclosing class:

ReduceDecimalsRule

public class ReduceDecimalsRule.DecimalShuttle
extends RexShuttle

A shuttle which converts decimal expressions to expressions based on longs.

Field Summary

Fields

Modifier and Type	Field	Description
private ReduceDecimalsRule.ExpanderMap	expanderMap
private java.util.Map<Pair<RexNode,java.lang.String>,RexNode>	irreducible
private java.util.Map<Pair<RexNode,java.lang.String>,RexNode>	results

Constructor Summary

Constructors

Constructor	Description
DecimalShuttle(RexBuilder rexBuilder)

Method Summary

Modifier and Type	Method	Description
private ReduceDecimalsRule.RexExpander	getExpander(RexCall call)	Returns a ReduceDecimalsRule.RexExpander for a call
private RexNode	lookup(RexNode node)	Lookup registered node
private void	register(RexNode node, RexNode reducedNode)	Registers node so it will not be computed again
private RexNode	rewriteCall(RexCall call)	Rewrites a call, if required, or returns the original call
RexNode	visitCall(RexCall call)	Rewrites a call in place, from bottom up, as follows: visit operands visit call node rewrite call visit the rewritten call

Methods inherited from class org.apache.calcite.rex.RexShuttle

apply, apply, apply, mutate, visitArray, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitFieldCollations, visitInputRef, visitList, visitList, visitLiteral, visitLocalRef, visitOver, visitPatternFieldRef, visitRangeRef, visitSubQuery, visitTableInputRef, visitWindow

Methods inherited from class java.lang.Object

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

Field Detail

irreducible

private final java.util.Map<Pair<RexNode,java.lang.String>,RexNode> irreducible

results

private final java.util.Map<Pair<RexNode,java.lang.String>,RexNode> results

expanderMap

private final ReduceDecimalsRule.ExpanderMap expanderMap

Constructor Detail

DecimalShuttle

public DecimalShuttle(RexBuilder rexBuilder)

Method Detail

visitCall

public RexNode visitCall(RexCall call)

Rewrites a call in place, from bottom up, as follows:

1. visit operands
2. visit call node
   1. rewrite call
   2. visit the rewritten call

Specified by:

visitCall in interface RexVisitor<RexNode>

Overrides:

visitCall in class RexShuttle

register

private void register(RexNode node,
                      RexNode reducedNode)

Registers node so it will not be computed again

lookup

private RexNode lookup(RexNode node)

Lookup registered node

rewriteCall

private RexNode rewriteCall(RexCall call)

Rewrites a call, if required, or returns the original call

getExpander

private ReduceDecimalsRule.RexExpander getExpander(RexCall call)

Returns a ReduceDecimalsRule.RexExpander for a call