Package org.apache.flink.table.planner.plan.rules.logical

Class PushProjectIntoTableSourceScanRule

java.lang.Object
org.apache.calcite.plan.RelOptRule
org.apache.calcite.plan.RelRule<PushProjectIntoTableSourceScanRule.Config>
org.apache.flink.table.planner.plan.rules.logical.PushProjectIntoTableSourceScanRule
@Internal @Enclosing public class PushProjectIntoTableSourceScanRule extends org.apache.calcite.plan.RelRule<PushProjectIntoTableSourceScanRule.Config>
Pushes a LogicalProject into a LogicalTableScan.

If the source implements SupportsProjectionPushDown this rule pushes the projection of physical columns into the source.

If the source implements SupportsReadingMetadata this rule also pushes projected metadata into the source. For sources implementing SupportsReadingMetadata but not SupportsProjectionPushDown this is only done if SupportsReadingMetadata.supportsMetadataProjection() returns true. This is important for some sources which would not be re-usable if different instances (due to different projected metadata) of the source were used together.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static interface 
    PushProjectIntoTableSourceScanRule.Config
    Configuration for PushProjectIntoTableSourceScanRule.

    Nested classes/interfaces inherited from class org.apache.calcite.plan.RelRule

    org.apache.calcite.plan.RelRule.Done, org.apache.calcite.plan.RelRule.MatchHandler<R extends org.apache.calcite.plan.RelOptRule>, org.apache.calcite.plan.RelRule.OperandBuilder, org.apache.calcite.plan.RelRule.OperandDetailBuilder<R extends org.apache.calcite.rel.RelNode>, org.apache.calcite.plan.RelRule.OperandTransform

    Nested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule

    org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final PushProjectIntoTableSourceScanRule
    INSTANCE
     

    Fields inherited from class org.apache.calcite.plan.RelRule

    config

    Fields inherited from class org.apache.calcite.plan.RelOptRule

    description, operands, relBuilderFactory

  • Constructor Summary

    Constructors
    Constructor
    Description
    PushProjectIntoTableSourceScanRule(PushProjectIntoTableSourceScanRule.Config config)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    matches(org.apache.calcite.plan.RelOptRuleCall call)
     
    void
    onMatch(org.apache.calcite.plan.RelOptRuleCall call)
     

    Methods inherited from class org.apache.calcite.plan.RelOptRule

    any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, 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

  • Field Details

  • Constructor Details

  • Method Details

    • matches

      public boolean matches(org.apache.calcite.plan.RelOptRuleCall call)
      Overrides:
      matches in class org.apache.calcite.plan.RelOptRule

    • onMatch

      public void onMatch(org.apache.calcite.plan.RelOptRuleCall call)
      Specified by:
      onMatch in class org.apache.calcite.plan.RelOptRule