<?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\Platforms;

use function explode;

/**
 * Provides the behavior, features and SQL dialect of the PostgreSQL 9.1 database platform.
 *
 * @author Martin Hasoň <martin.hason@gmail.com>
 * @link   www.doctrine-project.org
 * @since  2.5
 */
class PostgreSQL91Platform extends PostgreSqlPlatform
{
    /**
     * {@inheritDoc}
     */
    public function supportsColumnCollation()
    {
        return true;
    }

    /**
     * {@inheritdoc}
     */
    protected function getReservedKeywordsClass()
    {
        return Keywords\PostgreSQL91Keywords::class;
    }

    /**
     * {@inheritDoc}
     */
    public function getColumnCollationDeclarationSQL($collation)
    {
        return 'COLLATE ' . $this->quoteSingleIdentifier($collation);
    }

    /**
     * {@inheritDoc}
     */
    public function getListTableColumnsSQL($table, $database = null)
    {
        $sql = parent::getListTableColumnsSQL($table, $database);
        $parts = explode('AS complete_type,', $sql, 2);

        return $parts[0].'AS complete_type, (SELECT tc.collcollate FROM pg_catalog.pg_collation tc WHERE tc.oid = a.attcollation) AS collation,'.$parts[1];
    }
}
