Re: [GENERAL] Possible to prevent transaction abort?

[Adam B]

I'm intrigued by this solution, Johan.  It might be just the ticket!  I'll do some benchmarks when I have time in a week or so. Johan Nel wrote: Adam B wrote: Hello all, Is it possible to prevent Postgre from aborting the transaction upon a constraint violation? >From the help files maybe the following could get you on the right track: This example uses exception handling to perform either UPDATE or INSERT, as appropriate: CREATE TABLE db (a INT PRIMARY KEY, b TEXT); CREATE FUNCTION merge_db(key INT, data TEXT) RETURNS VOID AS $$ BEGIN     LOOP         -- first try to update the key         UPDATE db SET b = data WHERE a = key;         IF found THEN             RETURN;         END IF;         -- not there, so try to insert the key         -- if someone else inserts the same key concurrently,         -- we could get a unique-key failure         BEGIN             INSERT INTO db(a,b) VALUES (key, data);             RETURN;         EXCEPTION WHEN unique_violation THEN             -- do nothing, and loop to try the UPDATE again         END;     END LOOP; END; $$ LANGUAGE plpgsql; HTH, Johan Nel Pretoria, South Africa. Videx Inc. 1105 N. E. Circle Blvd. Corvallis OR 97330 (541) 758-0521 CONFIDENTIAL COMMUNICATION: The email message and any attachments are intended only for the addressee.  They may be privileged, confidential, and protected from disclosure. If you are not the intended recipient, any dissemination, distribution, or copying is expressly prohibited.  If you received this email message in error, please notify the sender immediately by replying to this e-mail message or by telephone