PHP PDO creating tables?
Exec actually returns the rows, and I realised that after creating the table there is nothing to return.Thanks. :) – Alex Emilov Jun 22 at 16:01.
With "SELECT ... FOR UPDATE", "LOCK TABLES ..." or in SQLite with "BEGIN EXCLUSIVE TRANSACTION") and then your PHP script ends with a fatal error, unhandled exception or under other circumstances that lead to an unclean exit. To use that database again, it may then be necessary to disable the persistence attribute to get a new database connection or restart the web server. (Persistent connections should not work with a PHP-CGI anyway.) It does not work (tested with PHP 5.2.3/WinXP and SQLite) to close a persistent database connection - it will not actually be closed but instead returned to PDO's connection pool.
The only thing you can do to resolve the lock as a regular user (I imagine) is to try and get all of your persistent connections in a single script and unlock the tables resp. End the transactions with the appropriate SQL statements ("UNLOCK TABLES" in MySQL, "ROLLBACK" for transactions). Should they fail, there is no problem, but one or some of them might succeed and thereby resolve your locking problem.
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