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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | namespace Wikimedia\Rdbms; |
| 21 | |
| 22 | /** |
| 23 | * Lazy-loaded wrapper for simplification and scrubbing of SQL queries for profiling |
| 24 | * |
| 25 | * @since 1.34 |
| 26 | * @ingroup Profiler |
| 27 | * @ingroup Database |
| 28 | */ |
| 29 | class GeneralizedSql { |
| 30 | /** @var string */ |
| 31 | private $rawSql; |
| 32 | /** @var string */ |
| 33 | private $prefix; |
| 34 | |
| 35 | /** @var string|null */ |
| 36 | private $genericSql; |
| 37 | |
| 38 | /** |
| 39 | * @param string $rawSql |
| 40 | * @param string $prefix |
| 41 | */ |
| 42 | public function __construct( $rawSql, $prefix ) { |
| 43 | $this->rawSql = $rawSql; |
| 44 | $this->prefix = $prefix; |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * @return string |
| 49 | */ |
| 50 | public function stringify() { |
| 51 | if ( $this->genericSql !== null ) { |
| 52 | return $this->genericSql; |
| 53 | } |
| 54 | |
| 55 | $this->genericSql = $this->prefix . |
| 56 | substr( QueryBuilderFromRawSql::generalizeSQL( $this->rawSql ), 0, 255 ); |
| 57 | |
| 58 | return $this->genericSql; |
| 59 | } |
| 60 | |
| 61 | public function getRawSql() { |
| 62 | return $this->rawSql; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * @param Query $query |
| 67 | * @param string $prefix |
| 68 | * @return self |
| 69 | */ |
| 70 | public static function newFromQuery( Query $query, $prefix ) { |
| 71 | $generalizedSql = new self( $query->getSQL(), $prefix ); |
| 72 | |
| 73 | $cleanedSql = $query->getCleanedSql(); |
| 74 | if ( $cleanedSql != '' ) { |
| 75 | // Generalized SQL already provided; no need to use regexes |
| 76 | $generalizedSql->genericSql = $prefix . $cleanedSql; |
| 77 | } |
| 78 | |
| 79 | return $generalizedSql; |
| 80 | } |
| 81 | } |