Package com.sap.cds.ql.cqn

Interface CqnInSubquery

All Superinterfaces:

CqnExpression, CqnPredicate, CqnToken, CqnValue, JSONizable

@Beta
public interface CqnInSubquery
extends CqnPredicate

The in subquery predicate tests wether an actual value (n-tuple) is equal to any value (n-tuple) returned by a defined subquery. It evaluates to false if the subquery has an empty result.

Method Summary

Modifier and Type	Method	Description
default void	accept(CqnVisitor visitor)	Traverses the expression tree represented by this token with a given visitor.
CqnSelect	subquery()	The subquery that defines the set of expected values the actual value is tested against.
CqnValue	value()	The actual CqnValue (n-tuple) that is being compared to the result set (n-tuples) of the subquery().

Methods inherited from interface com.sap.cds.ql.cqn.CqnExpression

asArithmeticExpression, asCaseExpression, asExpression, asNegation, isArithmeticExpression, isCaseExpression, isExpression, isNegation, toJson

Methods inherited from interface com.sap.cds.ql.cqn.CqnPredicate

asPredicate, isPredicate

Methods inherited from interface com.sap.cds.ql.cqn.CqnToken

tokens

Methods inherited from interface com.sap.cds.ql.cqn.CqnValue

as, asFunction, asList, asLiteral, asNullValue, asParameter, asPlain, asRef, isFunction, isList, isLiteral, isNullValue, isParameter, isPlain, isRef, ofLiteral, ofRef, type

Method Details

value

CqnValue value()

The actual CqnValue (n-tuple) that is being compared to the result set (n-tuples) of the subquery().

Returns:

the actual CqnValue

subquery

CqnSelect subquery()

The subquery that defines the set of expected values the actual value is tested against.

Returns:

the subquery

accept

default void accept(CqnVisitor visitor)

Description copied from interface: CqnToken

Traverses the expression tree represented by this token with a given visitor. The traversal order is depth-first. If this token has child nodes they are traversed first by dispatching the visitor to the children's accept methods. Afterwards this token is passed to the visitor's visit method specific for this token's type.

Specified by:

accept in interface CqnExpression

Specified by:

accept in interface CqnToken

Parameters:

visitor - the CqnVisitor