Package org.apache.calcite.adapter.cassandra

Class CassandraRules.CassandraLimitRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.adapter.cassandra.CassandraRules.CassandraLimitRule

Enclosing class:

CassandraRules

private static class CassandraRules.CassandraLimitRule
extends RelOptRule

Rule to convert a EnumerableLimit to a CassandraLimit.

Field Summary

Fields

Modifier and Type	Field	Description
private static CassandraRules.CassandraLimitRule	INSTANCE

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

description, operands, relBuilderFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
private	CassandraLimitRule()

Method Summary

Modifier and Type	Method	Description
RelNode	convert(EnumerableLimit limit)
void	onMatch(RelOptRuleCall call)	Receives notification about a rule match.

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

private static final CassandraRules.CassandraLimitRule INSTANCE

Constructor Detail

CassandraLimitRule

private CassandraLimitRule()

Method Detail

convert

public RelNode convert(EnumerableLimit limit)

onMatch

public void onMatch(RelOptRuleCall call)

Description copied from class: RelOptRule

Receives notification about a rule match. At the time that this method is called, call.rels holds the set of relational expressions which match the operands to the rule; call.rels[0] is the root expression.

Typically a rule would check that the nodes are valid matches, creates a new expression, then calls back RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>) to register the expression.

Specified by:

onMatch in class RelOptRule

Parameters:

call - Rule call

See Also:

ConverterRule