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Re: 7.1 pg_dump fails for user-defined types (release stopper?)

From: Philip Warner <pjw(at)rhyme(dot)com(dot)au>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgreSQL(dot)org, pholben(at)greatbridge(dot)com
Subject: Re: 7.1 pg_dump fails for user-defined types (release stopper?)
Date: 2001-03-31 05:49:26
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
At 14:55 30/03/01 -0500, Tom Lane wrote:
>A more promising idea
>is to hack function creation so that the OID assigned to the function
>is lower than the OIDs assigned to any shell types created when the
>function is defined.

This seems hard; would it be better to have the CREATE TYPE use a new OID,
and fixup the refs?

>Or we could try to hack pg_dump to fix this,
>but that doesn't seem appetizing.

This *may* not be all that hard; there is a currently unused (always NULL)
parameter on the pg_dump ArchiveEntry calls intended for extra
dependencies. For UDTs, we could set the this to be the max OID that
references the type (or a list of OIDs, if we had to), then modify the
pg_restore sort code to check these values if not NULL. ie.

    (TOC2 > TOC1) 
        iff      (Max(TOC2.OID, TOC2.DEPS) > Max(TOC1.OID, TOC1.DEPS))
             OR  (    Max(TOC2.OID, TOC2.DEPS) = Max(TOC1.OID, TOC1.DEPS)
                  And TOC1.OID = Max(TOC2.DEPS)

    Where DEPS is a list of OIDs the TOC entry depends on.

(I *think* that's right...).

Since this will only be used when the args is non-null, this code would
only be activated in the current broken case.

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