(new.value != old.value) or (new.value IS NULL) or (old.value IS NULL) -----Ursprüngliche Nachricht----- Von: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org] Im Auftrag von Daniel Polski Gesendet: Donnerstag, 13. Oktober 2016 12:03 An: SQLite mailing list <sqlite-users@mailinglists.sqlite.org> Betreff: Re: [sqlite] Trigger WHEN condition, comparing with null
Thank you, I see. Any suggestion how to get the trigger to fire if (and only if) the values are different, including if one of the "sides" of old/new are null? Den 2016-10-13 kl. 11:56, skrev Kees Nuyt: > On Thu, 13 Oct 2016 11:45:14 +0200, Daniel Polski > <dan...@agelektronik.se> wrote: > > That's because the expression in the WHEN clause > (new.value != old.value) > is not valid when one of them is NULL. > > HTH > _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users ___________________________________________ Gunter Hick Software Engineer Scientific Games International GmbH FN 157284 a, HG Wien Klitschgasse 2-4, A-1130 Vienna, Austria Tel: +43 1 80100 0 E-Mail: h...@scigames.at This communication (including any attachments) is intended for the use of the intended recipient(s) only and may contain information that is confidential, privileged or legally protected. Any unauthorized use or dissemination of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by return e-mail message and delete all copies of the original communication. Thank you for your cooperation. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
