ReduceExpressionsRule.ProjectReduceExpressionsRule (Apache Calcite API)

java.lang.Object
- org.apache.calcite.plan.RelOptRule
- - org.apache.calcite.rel.rules.ReduceExpressionsRule
  - - org.apache.calcite.rel.rules.ReduceExpressionsRule.ProjectReduceExpressionsRule

Enclosing class:: ReduceExpressionsRule

public static class ReduceExpressionsRule.ProjectReduceExpressionsRule
extends ReduceExpressionsRule

Rule that reduces constants inside a Project.

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.calcite.rel.rules.ReduceExpressionsRule
  ReduceExpressionsRule.CalcReduceExpressionsRule, ReduceExpressionsRule.CaseShuttle, ReduceExpressionsRule.FilterReduceExpressionsRule, ReduceExpressionsRule.JoinReduceExpressionsRule, ReduceExpressionsRule.ProjectReduceExpressionsRule, ReduceExpressionsRule.ReducibleExprLocator, ReduceExpressionsRule.RexReplacer

Field Summary
- Fields inherited from class org.apache.calcite.rel.rules.ReduceExpressionsRule
  CALC_INSTANCE, EXCLUSION_PATTERN, FILTER_INSTANCE, JOIN_INSTANCE, matchNullability, PROJECT_INSTANCE
- Fields inherited from class org.apache.calcite.plan.RelOptRule
  description, operands, relBuilderFactory

Constructor Summary

Constructors
Constructor	Description
`ProjectReduceExpressionsRule(java.lang.Class<? extends Project> projectClass, boolean matchNullability, RelBuilderFactory relBuilderFactory)`
`ProjectReduceExpressionsRule(java.lang.Class<? extends Project> projectClass, RelBuilderFactory relBuilderFactory)`	Deprecated.

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.rel.rules.ReduceExpressionsRule
  findReducibleExps, predicateConstants, pushPredicateIntoCase, reduceExpressions, reduceExpressions, reduceExpressions, reduceExpressionsInternal, substitute
- Methods inherited from class org.apache.calcite.plan.RelOptRule
  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
- Methods inherited from class java.lang.Object
  clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ProjectReduceExpressionsRule
```
@Deprecated
public ProjectReduceExpressionsRule(java.lang.Class<? extends Project> projectClass,
                                    RelBuilderFactory relBuilderFactory)
```
    Deprecated.
  - ProjectReduceExpressionsRule
```
public ProjectReduceExpressionsRule(java.lang.Class<? extends Project> projectClass,
                                    boolean matchNullability,
                                    RelBuilderFactory relBuilderFactory)
```
- 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 class RelOptRule
    
    Parameters:
    
    call - Rule call
    
    See Also:
    
    RelOptRule.matches(RelOptRuleCall)