org.apache.calcite.rel.hint

Class HintPredicates

java.lang.Object

org.apache.calcite.rel.hint.HintPredicates

public abstract class HintPredicates
extends Object

A collection of hint predicates.

Field Summary

Fields

Modifier and Type	Field and Description
static HintPredicate	AGGREGATE A hint predicate that indicates a hint can only be used to Aggregate nodes.
static HintPredicate	CALC A hint predicate that indicates a hint can only be used to Calc nodes.
static HintPredicate	JOIN A hint predicate that indicates a hint can only be used to Join nodes.
static HintPredicate	PROJECT A hint predicate that indicates a hint can only be used to Project nodes.
static HintPredicate	SET_VAR A hint predicate that indicates a hint can only be used to the whole query(no specific nodes).
static HintPredicate	TABLE_SCAN A hint predicate that indicates a hint can only be used to TableScan nodes.

Constructor Summary

Constructors

Constructor and Description
HintPredicates()

Method Summary

Modifier and Type	Method and Description
static HintPredicate	and(HintPredicate... hintPredicates) Returns a composed hint predicate that represents a short-circuiting logical AND of an array of hint predicates hintPredicates.
static HintPredicate	or(HintPredicate... hintPredicates) Returns a composed hint predicate that represents a short-circuiting logical OR of an array of hint predicates hintPredicates.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SET_VAR

public static final HintPredicate SET_VAR

A hint predicate that indicates a hint can only be used to the whole query(no specific nodes).

JOIN

public static final HintPredicate JOIN

A hint predicate that indicates a hint can only be used to Join nodes.

TABLE_SCAN

public static final HintPredicate TABLE_SCAN

A hint predicate that indicates a hint can only be used to TableScan nodes.

PROJECT

public static final HintPredicate PROJECT

A hint predicate that indicates a hint can only be used to Project nodes.

AGGREGATE

public static final HintPredicate AGGREGATE

A hint predicate that indicates a hint can only be used to Aggregate nodes.

CALC

public static final HintPredicate CALC

A hint predicate that indicates a hint can only be used to Calc nodes.

Constructor Detail

HintPredicates

public HintPredicates()

Method Detail

and

public static HintPredicate and(HintPredicate... hintPredicates)

Returns a composed hint predicate that represents a short-circuiting logical AND of an array of hint predicates hintPredicates. When evaluating the composed predicate, if a predicate is false, then all the left predicates are not evaluated.

The predicates are evaluated in sequence.

or

public static HintPredicate or(HintPredicate... hintPredicates)

Returns a composed hint predicate that represents a short-circuiting logical OR of an array of hint predicates hintPredicates. When evaluating the composed predicate, if a predicate is true, then all the left predicates are not evaluated.

The predicates are evaluated in sequence.