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<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Core\Database\Platform;
use Doctrine\DBAL\Exception as DBALException;
use Doctrine\DBAL\Platforms\AbstractPlatform;
use Doctrine\DBAL\Platforms\MySQLPlatform;
use Doctrine\DBAL\Platforms\PostgreSQL94Platform as PostgreSQLPlatform;
use Doctrine\DBAL\Platforms\SqlitePlatform;
/**
* Helper to handle platform specific details
*
* @internal
*/
class PlatformInformation
{
/**
* @var array
*/
protected static $identifierLimits = [
'mysql' => 63,
'postgresql' => 63,
'sqlite' => 1024, // arbitrary limit, SQLite is only limited by the total statement length
];
/**
* @var array
*/
protected static $bindParameterLimits = [
'mysql' => 65535,
'postgresql' => 34464,
'sqlite' => 999,
];
/**
* @var string[]
*/
protected static $charSetMap = [
'mysql' => 'utf8mb4',
'postgresql' => 'UTF8',
'sqlite' => 'utf8',
];
/**
* @var string[]
*/
protected static $databaseCreateWithCharsetMap = [
'mysql' => 'CHARACTER SET %s',
'postgresql' => "ENCODING '%s'",
];
/**
* Return the encoding of the given platform
*/
public static function getCharset(AbstractPlatform $platform): string
{
$platformName = static::getPlatformIdentifier($platform);
return static::$charSetMap[$platformName];
}
/**
* Return the statement to create a database with the desired encoding for the given platform
*/
public static function getDatabaseCreateStatementWithCharset(AbstractPlatform $platform, string $databaseName): string
{
try {
$createStatement = $platform->getCreateDatabaseSQL($databaseName);
} catch (DBALException $exception) {
// just silently ignore that error as the selected database does not support any creation of a database
return '';
}
$platformName = static::getPlatformIdentifier($platform);
$charset = static::getCharset($platform);
return $createStatement . ' ' . sprintf(static::$databaseCreateWithCharsetMap[$platformName], $charset);
}
/**
* Return information about the maximum supported length for a SQL identifier.
*
* @internal
*/
public static function getMaxIdentifierLength(AbstractPlatform $platform): int
{
$platformName = static::getPlatformIdentifier($platform);
return self::$identifierLimits[$platformName];
}
/**
* Return information about the maximum number of bound parameters supported on this platform
*
* @internal
*/
public static function getMaxBindParameters(AbstractPlatform $platform): int
{
$platformName = static::getPlatformIdentifier($platform);
return self::$bindParameterLimits[$platformName];
}
/**
* Return the platform shortname to use as a lookup key
*
* @throws \RuntimeException
* @internal
*/
protected static function getPlatformIdentifier(AbstractPlatform $platform): string
{
if ($platform instanceof MySQLPlatform) {
return 'mysql';
}
if ($platform instanceof PostgreSqlPlatform) {
return 'postgresql';
}
if ($platform instanceof SqlitePlatform) {
return 'sqlite';
}
throw new \RuntimeException(
'Unsupported Databaseplatform "' . get_class($platform) . '" detected in PlatformInformation',
1500958070
);
}
}