How can I get the ID of the last INSERTed row using PDO with SQL Server?

问题:

Under other circumstances I might be tempted to use

$result = mssql_query("INSERT INTO table (fields) VALUES (data);                         SELECT CAST(scope_identity() AS int)");

but as I will be inserting user-submitted data, I want to continue to use PDO, which returns an empty array.

Unfortunately, I'm running PHP on a Linux server and using dblib to interface with Microsoft SQL Server, which doesn't support PDO::lastInsertID().

Please help!

Update to include code example

Here's the code I'm using: col1 is a field of type int identity and col2 is a datetime with a default of getdate().

//  Connect to db with PDO $pdo = new PDO( 'dblib:host=' . $host . ';dbname=' . $database . ';', $username, $password, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION) ); //  Connect to db with MSSQL $sql = mssql_connect( $host, $username, $password ); mssql_select_db( $database, $sql ); //  Create SQL statement $query = "INSERT INTO [table] ( col3, col4, col5 )           VALUES ( 'str1', 'str2', 'str3' );           SELECT SCOPE_IDENTITY() AS theID;"; //  Run with MSSQL echo "Using MSSQL...\n"; $result = mssql_query( $query ); $the_id = mssql_result( $result, 0, 'theID' ); echo "Query OK. Returned ID is " . $the_id . "\n"; // Run with PDO echo "\nUsing PDO...\n"; $stmt = $pdo->query( $query ); $result = $stmt->fetchAll( PDO::FETCH_ASSOC ); print_r( $result );

And this is what was displayed:

Using MSSQL... Query OK. Returned ID is 149  Using PDO... Array ( )

I would love to find out that I'd done something stupid, rather than come up against a horrible dead end :)

回答1:

You've got a few choices:

SELECT @@IDENTITY - return the last ID created by actions of the current connection, regardless of table/scope  SELECT SCOPE_IDENTITY() - last ID produced by the current connection, in scope, regardless of table  SELECT IDENT_CURRENT('name_of_table'); - last ID produced on that table, regardless of table/scope/connection

Of the three, SCOPE_IDENTITY() is the best candidate.

回答2:

Maybe you are getting two rowsets returned. Try adding SET NOCOUNT ON; to eliminate the INSERT's rowset, or use $stmt->nextRowset if your driver supports it.

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