![]() ![]() SQLiteTransaction transaction = conn.BeginTransaction() SQLiteCommand command = new SQLiteCommand(conn) SQLiteConnection conn = OpenNewConnection() ![]() LogEvent("Exception raised when opening connection to. SQLiteConnection conn = new SQLiteConnection() Ĭonn.ConnectionString = ConnectionString // private static SQLiteConnection OpenNewConnection() At this point I commit the transaction, however none of the updates are being performed on the database. After I'm done reading the recordset, I close the recordset and run the updates. I begin a transaction, read the rows, and while iterating on the recordset build up a string of update statements. During this operation all other users of the database need to be locked out to avoid bad reads. If we put the beginTransaction before the prepare, the second browser tab would hit the catch block and the commit would throw another PDOException indicating that transactions were still open.For an application we are developing we need to read n rows from a table and then selectively update those rows based on domain specific criteria. We test this by opening 2 browser tabs to this script and running them at the same time. Here's an example (Windows, PHP version 5.2.8). If you are using PDO::SQLITE and need to support a high level of concurrency with locking, try preparing your statements prior to calling beginTransaction() and you may also need to call closeCursor() on SELECT statements to prevent the driver from thinking that there are open transactions. You could just overload the beginTransaction() and commit() in your PDO wrapper like this: ![]() There is no need to mess you code and pass like a bool which indicate if transaction is already running. Won't work and is dangerous since you could close your transaction too early with the nested commit(). You can generate problems with nested beginTransaction and commit calls. ![]() Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search ![]()
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