org.apache.calcite.adapter.csv

Class CsvProjectTableScanRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.adapter.csv.CsvProjectTableScanRule

public class CsvProjectTableScanRule
extends RelOptRule

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

Field Summary

Fields

Modifier and Type	Field and Description
static CsvProjectTableScanRule	INSTANCE

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

description, operands

Method Summary

Methods

Modifier and Type	Method and Description
void	onMatch(RelOptRuleCall call)

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

any, convert, convert, convertList, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, operand, operand, operand, operand, operand, some, toString, unordered

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INSTANCE

public static final CsvProjectTableScanRule INSTANCE

Method Detail

onMatch

public void onMatch(RelOptRuleCall call)

Specified by:

onMatch in class RelOptRule