mirror of
https://github.com/nextcloud/server.git
synced 2024-11-14 12:26:49 +00:00
95 lines
3.4 KiB
PHP
95 lines
3.4 KiB
PHP
<?php
|
|
|
|
/**
|
|
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
|
|
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
|
|
* SPDX-License-Identifier: AGPL-3.0-only
|
|
*/
|
|
namespace OC\DB;
|
|
|
|
use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
|
|
|
|
class AdapterSqlite extends Adapter {
|
|
/**
|
|
* @param string $tableName
|
|
*/
|
|
public function lockTable($tableName) {
|
|
$this->conn->executeUpdate('BEGIN EXCLUSIVE TRANSACTION');
|
|
}
|
|
|
|
public function unlockTable() {
|
|
$this->conn->executeUpdate('COMMIT TRANSACTION');
|
|
}
|
|
|
|
public function fixupStatement($statement) {
|
|
$statement = preg_replace('/`(\w+)` ILIKE \?/', 'LOWER($1) LIKE LOWER(?)', $statement);
|
|
$statement = str_replace('`', '"', $statement);
|
|
$statement = str_ireplace('NOW()', 'datetime(\'now\')', $statement);
|
|
$statement = str_ireplace('GREATEST(', 'MAX(', $statement);
|
|
$statement = str_ireplace('UNIX_TIMESTAMP()', 'strftime(\'%s\',\'now\')', $statement);
|
|
return $statement;
|
|
}
|
|
|
|
/**
|
|
* Insert a row if the matching row does not exists. To accomplish proper race condition avoidance
|
|
* it is needed that there is also a unique constraint on the values. Then this method will
|
|
* catch the exception and return 0.
|
|
*
|
|
* @param string $table The table name (will replace *PREFIX* with the actual prefix)
|
|
* @param array $input data that should be inserted into the table (column name => value)
|
|
* @param array|null $compare List of values that should be checked for "if not exists"
|
|
* If this is null or an empty array, all keys of $input will be compared
|
|
* Please note: text fields (clob) must not be used in the compare array
|
|
* @return int number of inserted rows
|
|
* @throws \Doctrine\DBAL\Exception
|
|
* @deprecated 15.0.0 - use unique index and "try { $db->insert() } catch (UniqueConstraintViolationException $e) {}" instead, because it is more reliable and does not have the risk for deadlocks - see https://github.com/nextcloud/server/pull/12371
|
|
*/
|
|
public function insertIfNotExist($table, $input, ?array $compare = null) {
|
|
if (empty($compare)) {
|
|
$compare = array_keys($input);
|
|
}
|
|
$fieldList = '`' . implode('`,`', array_keys($input)) . '`';
|
|
$query = "INSERT INTO `$table` ($fieldList) SELECT "
|
|
. str_repeat('?,', count($input) - 1) . '? '
|
|
. " WHERE NOT EXISTS (SELECT 1 FROM `$table` WHERE ";
|
|
|
|
$inserts = array_values($input);
|
|
foreach ($compare as $key) {
|
|
$query .= '`' . $key . '`';
|
|
if (is_null($input[$key])) {
|
|
$query .= ' IS NULL AND ';
|
|
} else {
|
|
$inserts[] = $input[$key];
|
|
$query .= ' = ? AND ';
|
|
}
|
|
}
|
|
$query = substr($query, 0, -5);
|
|
$query .= ')';
|
|
|
|
try {
|
|
return $this->conn->executeUpdate($query, $inserts);
|
|
} catch (UniqueConstraintViolationException $e) {
|
|
// if this is thrown then a concurrent insert happened between the insert and the sub-select in the insert, that should have avoided it
|
|
// it's fine to ignore this then
|
|
//
|
|
// more discussions about this can be found at https://github.com/nextcloud/server/pull/12315
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
public function insertIgnoreConflict(string $table, array $values): int {
|
|
$builder = $this->conn->getQueryBuilder();
|
|
$builder->insert($table);
|
|
$updates = [];
|
|
foreach ($values as $key => $value) {
|
|
$builder->setValue($key, $builder->createNamedParameter($value));
|
|
}
|
|
|
|
return $this->conn->executeStatement(
|
|
$builder->getSQL() . ' ON CONFLICT DO NOTHING',
|
|
$builder->getParameters(),
|
|
$builder->getParameterTypes()
|
|
);
|
|
}
|
|
}
|