Package org.apache.calcite.plan
Class SubstitutionVisitor.FilterOnProjectRule
- java.lang.Object
-
- org.apache.calcite.plan.RelOptRule
-
- org.apache.calcite.plan.SubstitutionVisitor.FilterOnProjectRule
-
- Enclosing class:
- SubstitutionVisitor
public static class SubstitutionVisitor.FilterOnProjectRule extends RelOptRule
Rule that converts aLogicalFilter
on top of aLogicalProject
into a trivial filter (on a boolean column).
-
-
Field Summary
Fields Modifier and Type Field Description static SubstitutionVisitor.FilterOnProjectRule
INSTANCE
-
Fields inherited from class org.apache.calcite.plan.RelOptRule
description, operands, relBuilderFactory
-
-
Constructor Summary
Constructors Constructor Description FilterOnProjectRule(RelBuilderFactory relBuilderFactory)
Creates a FilterOnProjectRule.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
onMatch(RelOptRuleCall call)
Receives notification about a rule match.-
Methods inherited from class org.apache.calcite.plan.RelOptRule
any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, guessDescription, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered
-
-
-
-
Field Detail
-
INSTANCE
public static final SubstitutionVisitor.FilterOnProjectRule INSTANCE
-
-
Constructor Detail
-
FilterOnProjectRule
public FilterOnProjectRule(RelBuilderFactory relBuilderFactory)
Creates a FilterOnProjectRule.- Parameters:
relBuilderFactory
- Builder for relational expressions
-
-
Method Detail
-
onMatch
public void onMatch(RelOptRuleCall call)
Description copied from class:RelOptRule
Receives notification about a rule match. At the time that this method is called,call.rels
holds the set of relational expressions which match the operands to the rule;call.rels[0]
is the root expression.Typically a rule would check that the nodes are valid matches, creates a new expression, then calls back
RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>)
to register the expression.- Specified by:
onMatch
in classRelOptRule
- Parameters:
call
- Rule call- See Also:
RelOptRule.matches(RelOptRuleCall)
-
-