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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\db\driver;
/**
* MSSQL Database Base Abstraction Layer
 */
abstract class mssql_base extends \phpbb\db\driver\driver
{
    /**
    * {@inheritDoc}
    */
    public function sql_concatenate($expr1, $expr2)
    {
        return $expr1 . ' + ' . $expr2;
    }
    /**
    * {@inheritDoc}
    */
    function sql_escape($msg)
    {
        return str_replace(array("'", "\0"), array("''", ''), $msg);
    }
    /**
    * {@inheritDoc}
    */
    function sql_lower_text($column_name)
    {
        return "LOWER(SUBSTRING($column_name, 1, DATALENGTH($column_name)))";
    }
    /**
    * Build LIKE expression
    * @access private
    */
    function _sql_like_expression($expression)
    {
        return $expression . " ESCAPE '\\'";
    }
    /**
    * Build NOT LIKE expression
    * @access private
    */
    function _sql_not_like_expression($expression)
    {
        return $expression . " ESCAPE '\\'";
    }
    /**
    * {@inheritDoc}
    */
    function cast_expr_to_bigint($expression)
    {
        return 'CONVERT(BIGINT, ' . $expression . ')';
    }
    /**
    * Build db-specific query data
    * @access private
    */
    function _sql_custom_build($stage, $data)
    {
        return $data;
    }
    /**
    * {@inheritDoc}
    */
    function sql_quote($msg)
    {
        return '"' . $msg . '"';
    }
}