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

Class PushFilterIntoSourceScanRuleBase

java.lang.Object
org.apache.calcite.plan.RelOptRule
org.apache.flink.table.planner.plan.rules.logical.PushFilterIntoSourceScanRuleBase
Direct Known Subclasses:
PushFilterInCalcIntoTableSourceScanRule, PushFilterIntoTableSourceScanRule
public abstract class PushFilterIntoSourceScanRuleBase extends org.apache.calcite.plan.RelOptRule
Base class for rules that push down filters into table scan.

  • Nested Class Summary

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

    org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

  • Field Summary

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

    description, operands, relBuilderFactory

  • Constructor Summary

    Constructors
    Constructor
    Description
    PushFilterIntoSourceScanRuleBase(org.apache.calcite.plan.RelOptRuleOperand operand, String description)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected boolean
    canPushdownFilter(TableSourceTable tableSourceTable)
    Determines wether we can pushdown the filter into the source. we can not push filter twice, make sure FilterPushDownSpec has not been assigned as a capability.
    protected List<org.apache.calcite.rex.RexNode>
    convertExpressionToRexNode(List<org.apache.flink.table.expressions.ResolvedExpression> expressions, RelBuilder relBuilder)
     
    protected org.apache.calcite.rex.RexNode
    createRemainingCondition(RelBuilder relBuilder, List<org.apache.flink.table.expressions.ResolvedExpression> expressions, org.apache.calcite.rex.RexNode[] unconvertedPredicates)
     
    protected scala.Tuple2<org.apache.flink.table.connector.source.abilities.SupportsFilterPushDown.Result,TableSourceTable>
    resolveFiltersAndCreateTableSourceTable(org.apache.calcite.rex.RexNode[] convertiblePredicates, TableSourceTable oldTableSourceTable, org.apache.calcite.rel.core.TableScan scan, RelBuilder relBuilder)
    Resolves filters using the underlying sources SupportsFilterPushDown and creates a new TableSourceTable with the supplied predicates.

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

    any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, onMatch, 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 Details

    • PushFilterIntoSourceScanRuleBase

      public PushFilterIntoSourceScanRuleBase(org.apache.calcite.plan.RelOptRuleOperand operand, String description)

  • Method Details

    • convertExpressionToRexNode

      protected List<org.apache.calcite.rex.RexNode> convertExpressionToRexNode(List<org.apache.flink.table.expressions.ResolvedExpression> expressions, RelBuilder relBuilder)

    • createRemainingCondition

      protected org.apache.calcite.rex.RexNode createRemainingCondition(RelBuilder relBuilder, List<org.apache.flink.table.expressions.ResolvedExpression> expressions, org.apache.calcite.rex.RexNode[] unconvertedPredicates)

    • resolveFiltersAndCreateTableSourceTable

      protected scala.Tuple2<org.apache.flink.table.connector.source.abilities.SupportsFilterPushDown.Result,TableSourceTable> resolveFiltersAndCreateTableSourceTable(org.apache.calcite.rex.RexNode[] convertiblePredicates, TableSourceTable oldTableSourceTable, org.apache.calcite.rel.core.TableScan scan, RelBuilder relBuilder)
      Resolves filters using the underlying sources SupportsFilterPushDown and creates a new TableSourceTable with the supplied predicates.
      Parameters:
      convertiblePredicates - Predicates to resolve
      oldTableSourceTable - TableSourceTable to copy
      scan - Underlying table scan to push to
      relBuilder - Builder to push the scan to
      Returns:
      A tuple, constituting of the resolved filters and the newly created TableSourceTable

    • canPushdownFilter

      protected boolean canPushdownFilter(TableSourceTable tableSourceTable)
      Determines wether we can pushdown the filter into the source. we can not push filter twice, make sure FilterPushDownSpec has not been assigned as a capability.
      Parameters:
      tableSourceTable - Table scan to attempt to push into
      Returns:
      Whether we can push or not