Re: Patch for pg_dump: Multiple -t options and new -T option

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: "David F(dot) Skoll" <dfs(at)roaringpenguin(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>, pgsql-patches(at)postgresql(dot)org
Subject: Re: Patch for pg_dump: Multiple -t options and new -T option
Date: 2004-07-21 14:17:24
Message-ID: 200407211417.i6LEHON23029@candle.pha.pa.us
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David F. Skoll wrote:
> Hi,
>
> This is a response to several messages:
>
> 1) Copyright notice: I have no problem having this removed, although it
> would be nice to credit me somewhere in a comment.

We credit in the commit message, and in the release notes so it will
always be seen.

> 2) I put most of the code in a separate file so that if the patch is
> rejected, it's easy for me to maintain a forked copy. If the patch is
> accepted, obviously it can be integrated into an existing file.

OK. Makes sense.

> 3) Multiple -n options: We need to figure out how this would work, and make
> it non-surprising. Some ideas:
>
> pg_dump -t t1 -n s2 -t t2 -t t3 -n s4 -t t5
>
> What does that do? My guess is:
>
> - Dump table t1 in any schema
> - Dump tables t2 and t3 in schema s2
> - Dump table t5 in schema s4
>
> So now the position of the options matters! That might surprise people,
> because:
>
> pg_dump -s s1 -t t2
>
> is no longer the same as:
>
> pg_dump -t t2 -n s1
>
> What about:
>
> pg_dump -t t1 -n s2
>
> Should that dump table t1 in any schema, and any table in schema s2?
>
> If we can nail down the semantics, I can implement the patch. The
> code is very simple.

Even though I suggested it, I am afraid this is just too confusing an API.

And I can't think of another one. :-(

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073

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