Just throwing this out there ... how about the 'try / catch' construct in 'c++' ???
-----Original Message----- From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users-boun...@sqlite.org]on Behalf Of Simon Chen Sent: Wednesday, April 01, 2009 12:40 PM To: sqlite-users@sqlite.org Subject: Re: [sqlite] how to call c/c++ function in trigger I just realized that I need to something a bit more complicated. Basically, I need myfunction() to take parameters. The parameters should be generated based on the entry inserted, like something below: create trigger triggerName before insert on tableName1 when not myfunction(tableName1.name, tableName2.name (where tableName2.id == tableName1.parent)) begin select RAISE(ROLLBACK, 'error message'); end; Is it possible to do this in sqlite? I've been reading this document, and it doesn't look good: http://www.sqlite.org/lang_createtrigger.html It seems doable in other systems: http://www.sqlteam.com/article/an-introduction-to-triggers-part-i Thanks! Igor Tandetnik wrote: > > Simon Chen <simonche...@gmail.com> wrote: >> What I want is: >> >> - whenever I insert/update/delete a table entry, the specified c/c++ >> function is called >> - if the function returns true, the db action can proceed; otherwise, >> the db action should be rolled-back. > > create trigger triggerName before insert on tableName > when not myfunction() > begin > select RAISE(ROLLBACK, 'error message'); > end; > > -- or > > create trigger triggerName before insert on tableName > begin > select RAISE(ROLLBACK, 'error message') > where not myfunction(); > end; > > Similarly for update and delete. > > Igor Tandetnik > > > > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > -- View this message in context: http://www.nabble.com/how-to-call-c-c%2B%2B-function-in-trigger-tp22815938p2 2831836.html Sent from the SQLite mailing list archive at Nabble.com. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
