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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
namespace Wikimedia\Rdbms;
/**
* Lazy-loaded wrapper for simplification and scrubbing of SQL queries for profiling
*
* @since 1.34
* @ingroup Profiler
* @ingroup Database
*/
class GeneralizedSql {
/** @var string */
private $rawSql;
/** @var string */
private $prefix;
/** @var string|null */
private $genericSql;
/**
* @param string $rawSql
* @param string $prefix
*/
public function __construct( $rawSql, $prefix ) {
$this->rawSql = $rawSql;
$this->prefix = $prefix;
}
/**
* @return string
*/
public function stringify() {
if ( $this->genericSql !== null ) {
return $this->genericSql;
}
$this->genericSql = $this->prefix .
substr( QueryBuilderFromRawSql::generalizeSQL( $this->rawSql ), 0, 255 );
return $this->genericSql;
}
public function getRawSql() {
return $this->rawSql;
}
/**
* @param Query $query
* @param string $prefix
* @return self
*/
public static function newFromQuery( Query $query, $prefix ) {
$generalizedSql = new self( $query->getSQL(), $prefix );
$cleanedSql = $query->getCleanedSql();
if ( $cleanedSql != '' ) {
// Generalized SQL already provided; no need to use regexes
$generalizedSql->genericSql = $prefix . $cleanedSql;
}
return $generalizedSql;
}
}
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