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

Class ProjectWatermarkAssignerTransposeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

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

public class ProjectWatermarkAssignerTransposeRule
extends org.apache.calcite.plan.RelOptRule

Transpose between the LogicalWatermarkAssigner and LogicalProject. The transposed LogicalProject works like a pruner to prune the unused fields from source. The top level LogicalProject still has to do the calculation, filter and prune the rowtime column if the query doesn't need.

NOTES: Currently the rule doesn't support nested projection push down.

Nested Class Summary

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

org.apache.calcite.plan.RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields

Modifier and Type	Field and Description
static ProjectWatermarkAssignerTransposeRule	INSTANCE

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor and Description
ProjectWatermarkAssignerTransposeRule()

Method Summary

Modifier and Type	Method and 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 Detail

INSTANCE

public static final ProjectWatermarkAssignerTransposeRule INSTANCE

Constructor Detail

ProjectWatermarkAssignerTransposeRule

public ProjectWatermarkAssignerTransposeRule()

Method Detail

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