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<?php
namespace Illuminate\Database;
use Closure;
use Doctrine\DBAL\Driver\PDOSqlsrv\Driver as DoctrineDriver;
use Doctrine\DBAL\Version;
use Illuminate\Database\PDO\SqlServerDriver;
use Illuminate\Database\Query\Grammars\SqlServerGrammar as QueryGrammar;
use Illuminate\Database\Query\Processors\SqlServerProcessor;
use Illuminate\Database\Schema\Grammars\SqlServerGrammar as SchemaGrammar;
use Illuminate\Database\Schema\SqlServerBuilder;
use Illuminate\Filesystem\Filesystem;
use RuntimeException;
use Throwable;
class SqlServerConnection extends Connection
{
/**
* Execute a Closure within a transaction.
*
* @param \Closure $callback
* @param int $attempts
* @return mixed
*
* @throws \Throwable
*/
public function transaction(Closure $callback, $attempts = 1)
{
for ($a = 1; $a <= $attempts; $a++) {
if ($this->getDriverName() === 'sqlsrv') {
return parent::transaction($callback);
}
$this->getPdo()->exec('BEGIN TRAN');
// We'll simply execute the given callback within a try / catch block
// and if we catch any exception we can rollback the transaction
// so that none of the changes are persisted to the database.
try {
$result = $callback($this);
$this->getPdo()->exec('COMMIT TRAN');
}
// If we catch an exception, we will rollback so nothing gets messed
// up in the database. Then we'll re-throw the exception so it can
// be handled how the developer sees fit for their applications.
catch (Throwable $e) {
$this->getPdo()->exec('ROLLBACK TRAN');
throw $e;
}
return $result;
}
}
/**
* Get the default query grammar instance.
*
* @return \Illuminate\Database\Query\Grammars\SqlServerGrammar
*/
protected function getDefaultQueryGrammar()
{
return $this->withTablePrefix(new QueryGrammar);
}
/**
* Get a schema builder instance for the connection.
*
* @return \Illuminate\Database\Schema\SqlServerBuilder
*/
public function getSchemaBuilder()
{
if (is_null($this->schemaGrammar)) {
$this->useDefaultSchemaGrammar();
}
return new SqlServerBuilder($this);
}
/**
* Get the default schema grammar instance.
*
* @return \Illuminate\Database\Schema\Grammars\SqlServerGrammar
*/
protected function getDefaultSchemaGrammar()
{
return $this->withTablePrefix(new SchemaGrammar);
}
/**
* Get the schema state for the connection.
*
* @param \Illuminate\Filesystem\Filesystem|null $files
* @param callable|null $processFactory
*
* @throws \RuntimeException
*/
public function getSchemaState(Filesystem $files = null, callable $processFactory = null)
{
throw new RuntimeException('Schema dumping is not supported when using SQL Server.');
}
/**
* Get the default post processor instance.
*
* @return \Illuminate\Database\Query\Processors\SqlServerProcessor
*/
protected function getDefaultPostProcessor()
{
return new SqlServerProcessor;
}
/**
* Get the Doctrine DBAL driver.
*
* @return \Doctrine\DBAL\Driver\PDOSqlsrv\Driver|\Illuminate\Database\PDO\SqlServerDriver
*/
protected function getDoctrineDriver()
{
return class_exists(Version::class) ? new DoctrineDriver : new SqlServerDriver;
}
}