Package org.apache.calcite.rex

Interface RexVisitor<R>

Type Parameters:

R - Return type

All Known Implementing Classes:

ProjectCorrelateTransposeRule.RexFieldAccessReplacer, ReduceDecimalsRule.DecimalShuttle, ReduceExpressionsRule.CaseShuttle, ReduceExpressionsRule.ReducibleExprLocator, ReduceExpressionsRule.RexReplacer, RelOptUtil.InputFinder, RelOptUtil.InputReferencedVisitor, RelOptUtil.RexInputConverter, RelOptUtil.VariableUsedVisitor, RexChecker, RexInterpreter, RexPermutationShuttle, RexPermuteInputsShuttle, RexShuttle, RexToLixTranslator, RexUtil.ExprSimplifier, RexUtil.FieldAccessFinder, RexUtil.FixNullabilityShuttle, RexUtil.RexFinder, RexUtil.SubQueryCollector, RexUtil.SubQueryFinder, RexVisitorImpl

public interface RexVisitor<R>

Visitor pattern for traversing a tree of RexNode objects.

See Also:

• Glossary.VISITOR_PATTERN
• RexShuttle
• RexVisitorImpl

Method Summary

Modifier and Type	Method	Description
R	visitCall(RexCall call)
R	visitCorrelVariable(RexCorrelVariable correlVariable)
R	visitDynamicParam(RexDynamicParam dynamicParam)
default void	visitEach(Iterable<? extends RexNode> exprs)	Visits a list of expressions.
R	visitFieldAccess(RexFieldAccess fieldAccess)
R	visitInputRef(RexInputRef inputRef)
R	visitLambda(RexLambda lambda)
R	visitLambdaRef(RexLambdaRef lambdaRef)
default List<R>	visitList(Iterable<? extends RexNode> exprs)	Visits a list and returns a list of the results.
default void	visitList(Iterable<? extends RexNode> exprs, List<R> out)	Visits a list and writes the results to another list.
R	visitLiteral(RexLiteral literal)
R	visitLocalRef(RexLocalRef localRef)
R	visitOver(RexOver over)
R	visitPatternFieldRef(RexPatternFieldRef fieldRef)
R	visitRangeRef(RexRangeRef rangeRef)
R	visitSubQuery(RexSubQuery subQuery)
R	visitTableInputRef(RexTableInputRef fieldRef)

Method Details

visitInputRef

R visitInputRef(RexInputRef inputRef)

visitLocalRef

R visitLocalRef(RexLocalRef localRef)

visitLiteral

R visitLiteral(RexLiteral literal)

visitCall

R visitCall(RexCall call)

visitOver

R visitOver(RexOver over)

visitCorrelVariable

R visitCorrelVariable(RexCorrelVariable correlVariable)

visitDynamicParam

R visitDynamicParam(RexDynamicParam dynamicParam)

visitRangeRef

R visitRangeRef(RexRangeRef rangeRef)

visitFieldAccess

R visitFieldAccess(RexFieldAccess fieldAccess)

visitSubQuery

R visitSubQuery(RexSubQuery subQuery)

visitTableInputRef

R visitTableInputRef(RexTableInputRef fieldRef)

visitPatternFieldRef

R visitPatternFieldRef(RexPatternFieldRef fieldRef)

visitLambda

R visitLambda(RexLambda lambda)

visitLambdaRef

R visitLambdaRef(RexLambdaRef lambdaRef)

visitList

default void visitList(Iterable<? extends RexNode> exprs,
 List<R> out)

Visits a list and writes the results to another list.

visitList

default List<R> visitList(Iterable<? extends RexNode> exprs)

Visits a list and returns a list of the results. The resulting list is immutable and does not contain nulls.

visitEach

default void visitEach(Iterable<? extends RexNode> exprs)

Visits a list of expressions.