Re: [sqlite] About triggers
Galanos <[EMAIL PROTECTED]> wrote: > > In a table I have 2 triggers (BEFORE INSERT). How do I know in which order > they are executed (which is first which is second)? > You don't. The order of arbitrary. -- D. Richard Hipp <[EMAIL PROTECTED]> - To unsubscribe, send email to [EMAIL PROTECTED] -
[sqlite] About triggers
Hello, In a table I have 2 triggers (BEFORE INSERT). How do I know in which order they are executed (which is first which is second)? Thank you Kostas - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] About Triggers
On 07/08/06, chetana bhargav <[EMAIL PROTECTED]> wrote: Can you elobarate more on this. ( For me if two threads register for the same trigger condition, with different callback functions, do both the functions get called) The short answer to your question is no. (But I could be wrong) If I remember correctly, when Thread A and B both register a custom function in a trigger, say for an update, Then when Thread A does an update, only the trigger in Thread A will be 'notified'.
Re: [sqlite] About Triggers
chetana bhargav uttered: Hi, I have few questions regarding triggers, * If we want to have trigger for some condition and if multiple applications create a trigger for the same condition providing different C callback functions (which I guess is possible through sqlite3_create_function), will the trigger be fired to all the registered apps. Triggers are created at the schema level. As such, they don't callback to through the C API other than by creating a trigger body to call your custom function. If a database has more than once trigger for an event, they will all get called AFAIK. Make sure that any callback functions are registered in any threads that use the database. Callbacks are per-connection. Each thread will also get other threads' callbacks if registered, or an error is such a function is not defined. Make sure your callbacks are thread-safe! * Is it possible to get the rowid for which the trigger is fired, The trigger will have OLD.rowid (delete, update) or NEW.rowid (update, insert) for the row triggering the trigger. The rowid can then be passed into your callback as an argument. -- /"\ \ /ASCII RIBBON CAMPAIGN - AGAINST HTML MAIL X - AGAINST MS ATTACHMENTS / \
Re: [sqlite] About Triggers
- Last time I tried, the triggers are triggered only for the calling thread which registered the function. Can you elobarate more on this. ( For me if two threads register for the same trigger condition, with different callback functions, do both the functions get called) Cheers, Chetan Roberto <[EMAIL PROTECTED]> wrote: - Last time I tried, the triggers are triggered only for the calling thread which registered the function. - When the trigger is fired, you can refer to any field in the table. HTH. On 07/08/06, chetana bhargav wrote: > Hi, > > I have few questions regarding triggers, > > * If we want to have trigger for some condition and if multiple applications > create a trigger for the same condition providing different C callback > functions (which I guess is possible through sqlite3_create_function), will > the trigger be fired to all the registered apps. > > * Is it possible to get the rowid for which the trigger is fired, > > > - > See the all-new, redesigned Yahoo.com. Check it out. > - Do you Yahoo!? Next-gen email? Have it all with the all-new Yahoo! Mail Beta.
[sqlite] About Triggers
Hi, I have few questions regarding triggers, * If we want to have trigger for some condition and if multiple applications create a trigger for the same condition providing different C callback functions (which I guess is possible through sqlite3_create_function), will the trigger be fired to all the registered apps. * Is it possible to get the rowid for which the trigger is fired, - See the all-new, redesigned Yahoo.com. Check it out.
