vendor/doctrine/dbal/lib/Doctrine/DBAL/Query/QueryBuilder.php

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<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\DBAL\Query;

use Doctrine\DBAL\Query\Expression\CompositeExpression;
use Doctrine\DBAL\Connection;

/**
 * QueryBuilder class is responsible to dynamically create SQL queries.
 *
 * Important: Verify that every feature you use will work with your database vendor.
 * SQL Query Builder does not attempt to validate the generated SQL at all.
 *
 * The query builder does no validation whatsoever if certain features even work with the
 * underlying database vendor. Limit queries and joins are NOT applied to UPDATE and DELETE statements
 * even if some vendors such as MySQL support it.
 *
 * @link   www.doctrine-project.org
 * @since  2.1
 * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author Benjamin Eberlei <kontakt@beberlei.de>
 */
class QueryBuilder
{
    /*
     * The query types.
     */
    const SELECT = 0;
    const DELETE = 1;
    const UPDATE = 2;
    const INSERT = 3;

    /*
     * The builder states.
     */
    const STATE_DIRTY = 0;
    const STATE_CLEAN = 1;

    /**
     * The DBAL Connection.
     *
     * @var \Doctrine\DBAL\Connection
     */