On Tue, Oct 27, 2009 at 10:41 AM, Euler Taveira de Oliveira <eu...@timbira.com> wrote: > Marcelo Costa escreveu: >> Hi, hackers >> >> I have a problem at PostgreSQL 8.3.5 (Slackware Server and Win 2003 >> Server) SO independent. >> >> When run the scripts below I receive the error: >> > This is not a bug. There are many ways to shoot yourself in the foot; and it > is one of them... > >> UPDATE pg_trigger SET tgdeferrable = TRUE, tginitdeferred = TRUE; >> > This query will defer all of the triggers, including the cascade ones. If you > compiles with --enable-cassert you will see: > > TRAP: FailedAssertion("!(afterTriggers->query_depth >= 0)", Arquivo: > "/a/pgsql/src/backend/commands/trigger.c", Linha: 3893) > > Why don't you use the syntax (DEFERRABLE and INITIALLY DEFERRED)? That will do > the Right Thing (TM). > > BTW, is it worth preventing such a crash putting an elog message in trigger.c?
It doesn't seem right to allow a catalog change that results in an assertion failure. Seems like we should either prevent the catalog change, or have an elog() there rather than Assert(). ...Robert -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers