org.jooq.SelectForUpdateStep Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2015, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* 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
*
* http://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: http://www.jooq.org/licenses
*
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package org.jooq;
// ...
import static org.jooq.SQLDialect.CUBRID;
// ...
import static org.jooq.SQLDialect.DERBY;
import static org.jooq.SQLDialect.FIREBIRD;
import static org.jooq.SQLDialect.H2;
// ...
import static org.jooq.SQLDialect.HSQLDB;
// ...
// ...
import static org.jooq.SQLDialect.MARIADB;
import static org.jooq.SQLDialect.MYSQL;
// ...
import static org.jooq.SQLDialect.POSTGRES;
// ...
// ...
/**
* This type is used for the {@link Select}'s DSL API when selecting generic
* {@link Record} types.
*
* Example:
* -- get all authors' first and last names, and the number
* -- of books they've written in German, if they have written
* -- more than five books in German in the last three years
* -- (from 2011), and sort those authors by last names
* -- limiting results to the second and third row
*
* SELECT T_AUTHOR.FIRST_NAME, T_AUTHOR.LAST_NAME, COUNT(*)
* FROM T_AUTHOR
* JOIN T_BOOK ON T_AUTHOR.ID = T_BOOK.AUTHOR_ID
* WHERE T_BOOK.LANGUAGE = 'DE'
* AND T_BOOK.PUBLISHED > '2008-01-01'
* GROUP BY T_AUTHOR.FIRST_NAME, T_AUTHOR.LAST_NAME
* HAVING COUNT(*) > 5
* ORDER BY T_AUTHOR.LAST_NAME ASC NULLS FIRST
* LIMIT 2
* OFFSET 1
* FOR UPDATE
* OF FIRST_NAME, LAST_NAME
* NO WAIT
*
* create.select(TAuthor.FIRST_NAME, TAuthor.LAST_NAME, create.count())
* .from(T_AUTHOR)
* .join(T_BOOK).on(TBook.AUTHOR_ID.equal(TAuthor.ID))
* .where(TBook.LANGUAGE.equal("DE"))
* .and(TBook.PUBLISHED.greaterThan(parseDate('2008-01-01')))
* .groupBy(TAuthor.FIRST_NAME, TAuthor.LAST_NAME)
* .having(create.count().greaterThan(5))
* .orderBy(TAuthor.LAST_NAME.asc().nullsFirst())
* .limit(2)
* .offset(1)
* .forUpdate()
* .of(TAuthor.FIRST_NAME, TAuthor.LAST_NAME)
* .noWait();
* extends SelectOptionStep {
/**
* Add a FOR UPDATE clause to the end of the query.
*
* Note: not all SQL dialects allow for combining a FOR UPDATE
* clause with LIMIT .. OFFSET, or with GROUP BY.
* This essentially includes {@link SQLDialect#INGRES} and
* {@link SQLDialect#ORACLE}. These incompatibilities are not reflected by
* the jOOQ API.
*
* @see SelectQuery#setForUpdate(boolean) see LockProvider for more
* details
*/
@Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
SelectForUpdateOfStep forUpdate();
/**
* Add a FOR SHARE clause to the end of the query.
*
* @see SelectQuery#setForShare(boolean) see LockProvider for more
* details
*/
@Support({ MARIADB, MYSQL, POSTGRES })
SelectOptionStep forShare();
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}