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 org.apache.calcite.plan.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 Deprecated. Use CsvRules.PROJECT_SCAN.

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Constructor and Description
CsvProjectTableScanRule(org.apache.calcite.tools.RelBuilderFactory relBuilderFactory) Creates a CsvProjectTableScanRule.

Method Summary

Modifier and Type	Method and Description
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, 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

@Deprecated
public static final CsvProjectTableScanRule INSTANCE

Deprecated. Use CsvRules.PROJECT_SCAN.

Constructor Detail

CsvProjectTableScanRule

public CsvProjectTableScanRule(org.apache.calcite.tools.RelBuilderFactory relBuilderFactory)

Creates a CsvProjectTableScanRule.

Parameters:

relBuilderFactory - Builder for relational expressions

Method Detail

onMatch

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

Specified by:

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