Gecko [ paroquia-rio-de-mouro.pt ]

Name	Size	Permission	Date
QueryBuilder	[ DIR ]	drwxr-xr-x	2018-04-19 18:15
Adapter.php	6.45 KB	-rw-r--r--	2018-04-19 18:15
AdapterMySQL.php	1.39 KB	-rw-r--r--	2018-04-19 18:15
AdapterOCI8.php	1.83 KB	-rw-r--r--	2018-04-19 18:15
AdapterPgSql.php	1.23 KB	-rw-r--r--	2018-04-19 18:15
AdapterSqlite.php	2.97 KB	-rw-r--r--	2018-04-19 18:15
Connection.php	14.32 KB	-rw-r--r--	2018-04-19 18:15
ConnectionFactory.php	7.06 KB	-rw-r--r--	2018-04-19 18:15
MDB2SchemaManager.php	5.44 KB	-rw-r--r--	2018-04-19 18:15
MDB2SchemaReader.php	8.49 KB	-rw-r--r--	2018-04-19 18:15
MDB2SchemaWriter.php	5.36 KB	-rw-r--r--	2018-04-19 18:15
MigrationException.php	1.05 KB	-rw-r--r--	2018-04-19 18:15
MigrationService.php	10.27 KB	-rw-r--r--	2018-04-19 18:15
Migrator.php	7.57 KB	-rw-r--r--	2018-04-19 18:15
MySQLMigrator.php	2.8 KB	-rw-r--r--	2018-04-19 18:15
MySqlSchemaColumnDefinitionListener.php	7.53 KB	-rw-r--r--	2018-04-19 18:15
MySqlTools.php	1.37 KB	-rw-r--r--	2018-04-19 18:15
OCPostgreSqlPlatform.php	2.97 KB	-rw-r--r--	2018-04-19 18:15
OCSqlitePlatform.php	1.49 KB	-rw-r--r--	2018-04-19 18:15
OracleConnection.php	3.09 KB	-rw-r--r--	2018-04-19 18:15
OracleMigrator.php	6.21 KB	-rw-r--r--	2018-04-19 18:15
PgSqlTools.php	2.23 KB	-rw-r--r--	2018-04-19 18:15
PostgreSqlMigrator.php	1.81 KB	-rw-r--r--	2018-04-19 18:15
SQLiteMigrator.php	2.21 KB	-rw-r--r--	2018-04-19 18:15
SQLiteSessionInit.php	1.82 KB	-rw-r--r--	2018-04-19 18:15

Rename

<?php
/**
 * @author Victor Dubiniuk <dubiniuk@owncloud.com>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OC\DB;

use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
use Doctrine\DBAL\Schema\ColumnDiff;
use Doctrine\DBAL\Schema\TableDiff;
use Doctrine\DBAL\Types\Type;

class OCPostgreSqlPlatform extends PostgreSqlPlatform {

/**
	 * {@inheritDoc}
	 */
	public function getAlterTableSQL(TableDiff $diff){
		$queries = parent::getAlterTableSQL($diff);
		foreach ($queries as $index => $sql){
			// BIGSERIAL could not be used in statements altering column type
			// That's why we replace it with BIGINT 
			// see https://github.com/owncloud/core/pull/28364#issuecomment-315006853
			if (preg_match('|(ALTER TABLE\s+\S+\s+ALTER\s+\S+\s+TYPE\s+)(BIGSERIAL)|i', $sql, $matches)){
				$alterTable = $matches[1];
				$queries[$index] = $alterTable . 'BIGINT';
			}
			// Changing integer to bigint kills next autoincrement value
			// see https://github.com/owncloud/core/pull/28364#issuecomment-315006853
			if (preg_match('|ALTER TABLE\s+(\S+)\s+ALTER\s+(\S+)\s+DROP DEFAULT|i', $sql, $matches)){
				$queryColumnName = $matches[2];
				$columnDiff = $this->findColumnDiffByName($diff, $queryColumnName);
				if ($columnDiff){
					if ($this->shouldSkipDropDefault($columnDiff)){
						unset($queries[$index]);
						continue;
					}
				}
			}
		}
		
		return $queries;
	}

/**
	 * We should NOT drop next sequence value if
	 * - type was changed from INTEGER to BIGINT
	 * - column keeps an autoincrement
	 * - default value is kept NULL
	 *
	 * @param ColumnDiff $columnDiff
	 * @return bool
	 */
	private function shouldSkipDropDefault(ColumnDiff $columnDiff){
		$column = $columnDiff->column;
		$fromColumn = $columnDiff->fromColumn;
		return $fromColumn->getType()->getName() === Type::INTEGER
				&& $column->getType()->getName() === Type::BIGINT
				&& is_null($fromColumn->getDefault())
				&& is_null($column->getDefault())
				&& $fromColumn->getAutoincrement()
				&& $column->getAutoincrement();
	}

/**
	 * @param TableDiff $diff
	 * @param string $name
	 * @return  ColumnDiff | false
	 */
	private function findColumnDiffByName(TableDiff $diff, $name){
		foreach ($diff->changedColumns as $columnDiff){
			$oldColumnName = $columnDiff->getOldColumnName()->getQuotedName($this);
			if ($oldColumnName === $name){
				return $columnDiff;
			}
		}
		return false;
	}
}