org.jooq.GroupField Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Other licenses:
* -----------------------------------------------------------------------------
* Commercial licenses for this work are available. These replace the above
* ASL 2.0 and offer limited warranties, support, maintenance, and commercial
* database integrations.
*
* For more information, please visit: https://www.jooq.org/legal/licensing
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
package org.jooq;
import org.jooq.impl.DSL;
import org.jooq.impl.QOM;
/**
* An expression to be used exclusively in GROUP BY clauses.
*
* The SELECT … GROUP BY clause accepts a variety of expressions,
* mostly ordinary {@link Field} expressions, but also some special expressions
* usable only in the GROUP BY clause, such as
* {@link DSL#groupingSets(Field[][])}.
*
* Example:
*
*
* // Assuming import static org.jooq.impl.DSL.*;
*
* using(configuration)
* .select(ACTOR.LAST_NAME)
* .from(ACTOR)
* .groupBy(ACTOR.LAST_NAME) // GroupField reference here
* .fetch();
*
*
* Instances can be created using {@link DSL#groupingSets(Field[][])} and
* related methods, or by creating a subtype.
*
* @author Lukas Eder
*/
public sealed interface GroupField
extends
QueryPart
permits
Table,
Field,
QOM.EmptyGroupingSet,
QOM.Rollup,
QOM.Cube,
QOM.GroupingSets
{}