org.apache.nifi.queryrecord

Class FlowFileProjectTableScanRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.nifi.queryrecord.FlowFileProjectTableScanRule

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

Planner rule that projects from a FlowFileTableScan scan just the columns needed to satisfy a projection. If the projection's expressions are trivial, the projection is removed.

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 FlowFileProjectTableScanRule	INSTANCE

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Modifier	Constructor and Description
private	FlowFileProjectTableScanRule()

Method Summary

Modifier and Type	Method and Description
private int[]	getProjectFields(List<org.apache.calcite.rex.RexNode> exps)
void	onMatch(org.apache.calcite.plan.RelOptRuleCall call)

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

any, convert, convert, 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

Field Detail

INSTANCE

public static final FlowFileProjectTableScanRule INSTANCE

Constructor Detail

FlowFileProjectTableScanRule

private FlowFileProjectTableScanRule()

Method Detail

onMatch

public void onMatch(org.apache.calcite.plan.RelOptRuleCall call)

Specified by:

onMatch in class org.apache.calcite.plan.RelOptRule

getProjectFields

private int[] getProjectFields(List<org.apache.calcite.rex.RexNode> exps)