public class ProjectSetOpTransposeRule extends RelOptRule
LogicalProject
past a SetOp
.
The children of the SetOp
will project
only the RexInputRef
s referenced in the original
LogicalProject
.
Modifier and Type | Field and Description |
---|---|
static ProjectSetOpTransposeRule |
INSTANCE |
private PushProjector.ExprCondition |
preserveExprCondition
Expressions that should be preserved in the projection
|
description, operands, relBuilderFactory
Constructor and Description |
---|
ProjectSetOpTransposeRule(PushProjector.ExprCondition preserveExprCondition,
RelBuilderFactory relBuilderFactory)
Creates a ProjectSetOpTransposeRule with an explicit condition whether
to preserve expressions.
|
Modifier and Type | Method and Description |
---|---|
void |
onMatch(RelOptRuleCall call)
Receives notification about a rule match.
|
any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered
public static final ProjectSetOpTransposeRule INSTANCE
private PushProjector.ExprCondition preserveExprCondition
public ProjectSetOpTransposeRule(PushProjector.ExprCondition preserveExprCondition, RelBuilderFactory relBuilderFactory)
preserveExprCondition
- Condition whether to preserve expressionspublic void onMatch(RelOptRuleCall call)
RelOptRule
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.
onMatch
in class RelOptRule
call
- Rule callRelOptRule.matches(RelOptRuleCall)
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