94 lines
3 KiB
PHP
94 lines
3 KiB
PHP
<?php
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/**
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* @author Victor Dubiniuk <dubiniuk@owncloud.com>
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*
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* @copyright Copyright (c) 2017, ownCloud GmbH
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\DB;
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use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
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use Doctrine\DBAL\Schema\ColumnDiff;
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use Doctrine\DBAL\Schema\TableDiff;
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use Doctrine\DBAL\Types\Type;
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class OCPostgreSqlPlatform extends PostgreSqlPlatform {
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/**
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* {@inheritDoc}
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*/
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public function getAlterTableSQL(TableDiff $diff){
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$queries = parent::getAlterTableSQL($diff);
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foreach ($queries as $index => $sql){
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// BIGSERIAL could not be used in statements altering column type
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// That's why we replace it with BIGINT
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// see https://github.com/owncloud/core/pull/28364#issuecomment-315006853
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if (preg_match('|(ALTER TABLE\s+\S+\s+ALTER\s+\S+\s+TYPE\s+)(BIGSERIAL)|i', $sql, $matches)) {
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$alterTable = $matches[1];
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$queries[$index] = $alterTable . 'BIGINT';
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}
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// Changing integer to bigint kills next autoincrement value
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// see https://github.com/owncloud/core/pull/28364#issuecomment-315006853
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if (preg_match('|ALTER TABLE\s+(\S+)\s+ALTER\s+(\S+)\s+DROP DEFAULT|i', $sql, $matches)) {
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$queryColumnName = $matches[2];
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$columnDiff = $this->findColumnDiffByName($diff, $queryColumnName);
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if ($columnDiff && $this->shouldSkipDropDefault($columnDiff)) {
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unset($queries[$index]);
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continue;
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}
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}
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}
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return $queries;
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}
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/**
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* We should NOT drop next sequence value if
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* - type was changed from INTEGER to BIGINT
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* - column keeps an autoincrement
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* - default value is kept NULL
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*
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* @param ColumnDiff $columnDiff
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* @return bool
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*/
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private function shouldSkipDropDefault(ColumnDiff $columnDiff) {
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$column = $columnDiff->column;
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$fromColumn = $columnDiff->fromColumn;
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return $fromColumn->getType()->getName() === Type::INTEGER
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&& $column->getType()->getName() === Type::BIGINT
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&& $fromColumn->getDefault() === null
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&& $column->getDefault() === null
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&& $fromColumn->getAutoincrement()
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&& $column->getAutoincrement();
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}
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/**
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* @param TableDiff $diff
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* @param string $name
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* @return ColumnDiff | false
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*/
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private function findColumnDiffByName(TableDiff $diff, $name) {
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foreach ($diff->changedColumns as $columnDiff) {
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$oldColumnName = $columnDiff->getOldColumnName()->getQuotedName($this);
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if ($oldColumnName === $name) {
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return $columnDiff;
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}
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}
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return false;
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}
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}
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