sirius.db.jdbc.constraints

Class Exists

java.lang.Object

sirius.db.mixing.query.constraints.Constraint

sirius.db.jdbc.constraints.SQLConstraint

sirius.db.jdbc.constraints.Exists

public class Exists
extends SQLConstraint

Generates an EXISTS subquery mapping the given field to the field of the queried entity.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Exists(Mapping outerColumn, Class<? extends SQLEntity> other, Mapping innerColumn)

Method Summary

Modifier and Type	Method and Description
void	appendSQL(SmartQuery.Compiler compiler) Generates the appropriate SQL into the given compiler
void	asString(StringBuilder builder) Creates a string representation of this constraint.
Exists	where(SQLConstraint constraint) Adds an additional constraint to further filter the entities which must or must not exist.

Methods inherited from class sirius.db.mixing.query.constraints.Constraint

toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Exists

protected Exists(Mapping outerColumn,
                 Class<? extends SQLEntity> other,
                 Mapping innerColumn)

Method Detail

where

public Exists where(SQLConstraint constraint)

Adds an additional constraint to further filter the entities which must or must not exist.

Parameters:

constraint - the constaint on the inner entity type

Returns:

the exists itself for fluent method calls

appendSQL

public void appendSQL(SmartQuery.Compiler compiler)

Description copied from class: SQLConstraint

Generates the appropriate SQL into the given compiler

Specified by:

appendSQL in class SQLConstraint

Parameters:

compiler - the current query compiler to apply the constraint to

asString

public void asString(StringBuilder builder)

Description copied from class: Constraint

Creates a string representation of this constraint.

Specified by:

asString in class Constraint

Parameters:

builder - the target to write the string representation to