Re: Reconstructing FKs in pg_dump
От | Tom Lane |
---|---|
Тема | Re: Reconstructing FKs in pg_dump |
Дата | |
Msg-id | 17170.1033078965@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | Re: Reconstructing FKs in pg_dump (Robert Treat <xzilla@users.sourceforge.net>) |
Список | pgsql-hackers |
Robert Treat <xzilla@users.sourceforge.net> writes: > On Thu, 2002-09-26 at 17:22, Tom Lane wrote: >> Robert Treat <xzilla@users.sourceforge.net> writes: > I'm trying to think of the cases where this extraction might fail, but > maybe more important is what happens if it does fail? >> >> Then you have broken RI triggers ... which is the problem now. > Uh...yeah, I got that part. I meant what will be done if/when it fails? > Throw a WARNING and keep going? Throw an ERROR and die? What I was thinking of was to do the following in CREATE CONSTRAINT TRIGGER: if (no FROM clause){ try to extract table name from given tgargs; try to look up table OID; if successful, inserttable OID into tgconstrrelid;} If the lookup fails, you'd be left creating a constraint trigger with zero tgconstrrelid, which is what's happening now. That would error out upon use (if it's really an RI trigger), thus alerting you that you have a broken trigger. (We could add a couple of lines in the RI triggers to cause the error message to be more helpful than "Relation 0 not found".) regards, tom lane
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