2013/11/17 Tom Lane <t...@sss.pgh.pa.us> > Pavel Stehule <pavel.steh...@gmail.com> writes: > > [ rebased patch for RAISE WHEN ] > > I have to say I do not see the point of this. It does nothing you > can't do already with "IF condition THEN RAISE ...". And frankly > the RAISE statement has got too darn many options already. We don't > need yet more cruft on it that we'll have to maintain forevermore. > > If this were improving standards compliance somehow, I'd be okay > with it; but what other implementation has got this? >
RAISE statement is not ANSI compliant ever, and it has only thin similarity with Oracle' PL/SQL RAISE statement now - and it is significantly enhanced in relation to original ADA Usually I am not a happy, when PL/pgSQL going far from original ADA, but I think so this use case is very practical current usual pattern is less readable than conditional RAISE It is similar to CONTINUE and EXIST statement. Actually we need a some functionality, that allows simply write assertions (without custom source code uglyfication). RAISE WHEN is good for this purpose. Regards Pavel > > regards, tom lane >
