org.apache.calcite.rex

Class RexUtil.SubQueryFinder

java.lang.Object

org.apache.calcite.rex.RexVisitorImpl<Void>

org.apache.calcite.rex.RexUtil.SubQueryFinder

All Implemented Interfaces:

RexVisitor<Void>

Enclosing class:

RexUtil

public static class RexUtil.SubQueryFinder
extends RexVisitorImpl<Void>

Visitor that throws Util.FoundOne if applied to an expression that contains a RexSubQuery.

Field Summary

Fields

Modifier and Type	Field and Description
static com.google.common.base.Predicate<Filter>	FILTER_PREDICATE Returns whether a Filter contains a sub-query.
static RexUtil.SubQueryFinder	INSTANCE
static com.google.common.base.Predicate<Join>	JOIN_PREDICATE Returns whether a Join contains a sub-query.
static com.google.common.base.Predicate<Project>	PROJECT_PREDICATE Returns whether a Project contains a sub-query.

Fields inherited from class org.apache.calcite.rex.RexVisitorImpl

deep

Constructor Summary

Constructors

Modifier	Constructor and Description
private	SubQueryFinder()

Method Summary

Modifier and Type	Method and Description
static RexSubQuery	find(Iterable<RexNode> nodes)
static RexSubQuery	find(RexNode node)
Void	visitSubQuery(RexSubQuery subQuery)

Methods inherited from class org.apache.calcite.rex.RexVisitorImpl

visitArrayAnd, visitArrayOr, visitCall, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitInputRef, visitLiteral, visitLocalRef, visitOver, visitPatternFieldRef, visitRangeRef, visitTableInputRef

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final RexUtil.SubQueryFinder INSTANCE

PROJECT_PREDICATE

public static final com.google.common.base.Predicate<Project> PROJECT_PREDICATE

Returns whether a Project contains a sub-query.

FILTER_PREDICATE

public static final com.google.common.base.Predicate<Filter> FILTER_PREDICATE

Returns whether a Filter contains a sub-query.

JOIN_PREDICATE

public static final com.google.common.base.Predicate<Join> JOIN_PREDICATE

Returns whether a Join contains a sub-query.

Constructor Detail

SubQueryFinder

private SubQueryFinder()

Method Detail

visitSubQuery

public Void visitSubQuery(RexSubQuery subQuery)

Specified by:

visitSubQuery in interface RexVisitor<Void>

Overrides:

visitSubQuery in class RexVisitorImpl<Void>

find

public static RexSubQuery find(Iterable<RexNode> nodes)

find

public static RexSubQuery find(RexNode node)