Package org.apache.calcite.rex

Class LogicVisitor

java.lang.Object

org.apache.calcite.rex.LogicVisitor

All Implemented Interfaces:

RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

public class LogicVisitor
extends java.lang.Object
implements RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

Visitor pattern for traversing a tree of RexNode objects.

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Collection<RelOptUtil.Logic>	logicCollection
private RexNode	seek

Constructor Summary

Constructors

Modifier	Constructor	Description
private	LogicVisitor(RexNode seek, java.util.Collection<RelOptUtil.Logic> logicCollection)	Creates a LogicVisitor.

Method Summary

Modifier and Type	Method	Description
static void	collect(RexNode node, RexNode seek, RelOptUtil.Logic logic, java.util.List<RelOptUtil.Logic> logicList)
private RelOptUtil.Logic	end(RexNode node, RelOptUtil.Logic arg)
static RelOptUtil.Logic	find(RelOptUtil.Logic logic, java.util.List<RexNode> nodes, RexNode seek)	Finds a suitable logic for evaluating seek within a list of expressions.
RelOptUtil.Logic	visitCall(RexCall call, RelOptUtil.Logic logic)
RelOptUtil.Logic	visitCorrelVariable(RexCorrelVariable correlVariable, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitDynamicParam(RexDynamicParam dynamicParam, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitFieldAccess(RexFieldAccess fieldAccess, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitInputRef(RexInputRef inputRef, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitLiteral(RexLiteral literal, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitLocalRef(RexLocalRef localRef, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitOver(RexOver over, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitPatternFieldRef(RexPatternFieldRef ref, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitRangeRef(RexRangeRef rangeRef, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitSubQuery(RexSubQuery subQuery, RelOptUtil.Logic arg)
RelOptUtil.Logic	visitTableInputRef(RexTableInputRef ref, RelOptUtil.Logic arg)

Methods inherited from class java.lang.Object

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

Field Detail

seek

private final RexNode seek

logicCollection

private final java.util.Collection<RelOptUtil.Logic> logicCollection

Constructor Detail

LogicVisitor

private LogicVisitor(RexNode seek,
                     java.util.Collection<RelOptUtil.Logic> logicCollection)

Creates a LogicVisitor.

Method Detail

find

public static RelOptUtil.Logic find(RelOptUtil.Logic logic,
                                    java.util.List<RexNode> nodes,
                                    RexNode seek)

Finds a suitable logic for evaluating seek within a list of expressions.

Chooses a logic that is safe (that is, gives the right answer) with the fewest possibilities (that is, we prefer one that returns [true as true, false as false, unknown as false] over one that distinguishes false from unknown).

collect

public static void collect(RexNode node,
                           RexNode seek,
                           RelOptUtil.Logic logic,
                           java.util.List<RelOptUtil.Logic> logicList)

visitCall

public RelOptUtil.Logic visitCall(RexCall call,
                                  RelOptUtil.Logic logic)

Specified by:

visitCall in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

end

private RelOptUtil.Logic end(RexNode node,
                             RelOptUtil.Logic arg)

visitInputRef

public RelOptUtil.Logic visitInputRef(RexInputRef inputRef,
                                      RelOptUtil.Logic arg)

Specified by:

visitInputRef in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitLocalRef

public RelOptUtil.Logic visitLocalRef(RexLocalRef localRef,
                                      RelOptUtil.Logic arg)

Specified by:

visitLocalRef in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitLiteral

public RelOptUtil.Logic visitLiteral(RexLiteral literal,
                                     RelOptUtil.Logic arg)

Specified by:

visitLiteral in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitOver

public RelOptUtil.Logic visitOver(RexOver over,
                                  RelOptUtil.Logic arg)

Specified by:

visitOver in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitCorrelVariable

public RelOptUtil.Logic visitCorrelVariable(RexCorrelVariable correlVariable,
                                            RelOptUtil.Logic arg)

Specified by:

visitCorrelVariable in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitDynamicParam

public RelOptUtil.Logic visitDynamicParam(RexDynamicParam dynamicParam,
                                          RelOptUtil.Logic arg)

Specified by:

visitDynamicParam in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitRangeRef

public RelOptUtil.Logic visitRangeRef(RexRangeRef rangeRef,
                                      RelOptUtil.Logic arg)

Specified by:

visitRangeRef in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitFieldAccess

public RelOptUtil.Logic visitFieldAccess(RexFieldAccess fieldAccess,
                                         RelOptUtil.Logic arg)

Specified by:

visitFieldAccess in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitSubQuery

public RelOptUtil.Logic visitSubQuery(RexSubQuery subQuery,
                                      RelOptUtil.Logic arg)

Specified by:

visitSubQuery in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitTableInputRef

public RelOptUtil.Logic visitTableInputRef(RexTableInputRef ref,
                                           RelOptUtil.Logic arg)

Specified by:

visitTableInputRef in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>

visitPatternFieldRef

public RelOptUtil.Logic visitPatternFieldRef(RexPatternFieldRef ref,
                                             RelOptUtil.Logic arg)

Specified by:

visitPatternFieldRef in interface RexBiVisitor<RelOptUtil.Logic,RelOptUtil.Logic>