pg_dump and circular dependency

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От andrew@pillette.com
Тема pg_dump and circular dependency
Дата
Msg-id 200402162228.i1GMSnE11453@pillette.com
обсуждение исходный текст
Ответы Re: pg_dump and circular dependency  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-general
Table A has a CHECK constraint testing boolean function F.
Function F has a SELECT from Table A.

In my manual build script, I create the table, then the function, and then at the very end of the script to I do an
ALTERTABLE ADD CHECK. 

pg_dump appears to put the CHECK constraint as a clause in the CREATE TABLE statement. Now I'm in trouble, because
whicheverof the table or the function is read in first by pg_restore refers to an object that hasn't been created yet.
Therestore fails. 

I suppose I can replace the CHECK with an explicit trigger (that uses an exception) and then pg_dump will get the
creationsequence correct. Is there another way? 

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