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-From pgsql-patches-owner+M12042=pgman=candle.pha.pa.us@postgresql.org Wed Jul 21 10:23:52 2004
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-Date: Wed, 21 Jul 2004 10:22:25 -0400 (EDT)
-From: "David F. Skoll" <dfs@roaringpenguin.com>
-To: Bruce Momjian <pgman@candle.pha.pa.us>
-cc: Tom Lane <tgl@sss.pgh.pa.us>,
- Christopher Kings-Lynne <chriskl@familyhealth.com.au>,
- pgsql-patches@postgresql.org
-Subject: Re: [PATCHES] Patch for pg_dump: Multiple -t options and new -T
-In-Reply-To: <200407211417.i6LEHON23029@candle.pha.pa.us>
-Message-ID: <Pine.LNX.4.58.0407211018510.8830@shishi.roaringpenguin.com>
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-On Wed, 21 Jul 2004, Bruce Momjian wrote:
-
-> Even though I suggested it, I am afraid this is just too confusing an API.
-
-How about this:
-
-pg_dump -t t1 -- Dump table t1 in any schema
-pg_dump -n s1 -- Dump all of schema s1
-pg_dump -t t1 -n s1 -- Dump t1 in s1
-pg_dump -t t1 -t t2 -n s1 -- Dump s1.t1 and s1.t2
-pg_dump -t t1 -t t2 -n s1 -n s2 -- Dump s1.t1, s1.t2, s2.t1 and s2.t2
-
-Basically, no "-t" option means dump all tables. No "-n" option
-means dump all schemas. If any "-t" or "-n" options are present,
-then we only dump the specified tables/schemas. We also probably
-should not warn about missing tables, because it's likely that the
-full cartesian product of schemas and tables won't exist.
-
-And we nuke the -T and -N options.
-
-Regards,
-
-David.
-
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-Date: Wed, 21 Jul 2004 10:59:28 -0400 (EDT)
-From: "David F. Skoll" <dfs@roaringpenguin.com>
-To: Tom Lane <tgl@sss.pgh.pa.us>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Christopher Kings-Lynne <chriskl@familyhealth.com.au>,
- pgsql-patches@postgresql.org
-Subject: Re: [PATCHES] Patch for pg_dump: Multiple -t options and new -T
-In-Reply-To: <8489.1090420787@sss.pgh.pa.us>
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-On Wed, 21 Jul 2004, Tom Lane wrote:
-
-> pg_dump -t s1.t1 -t s2.t2 -- Dump s1.t1 and s2.t2
-
-That's a good idea, but then it's questionable whether we need the -n
-switch at all. It might be simpler to extend the -t switch to
-accept:
-
- pg-dump -t 's1.*'
-
-rather than using a -n switch. Of course, that breaks
-backward-compatibility.
-
-Regards,
-
-David.
-
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-From dfs@roaringpenguin.com Wed Jul 21 10:59:47 2004
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-Date: Wed, 21 Jul 2004 10:59:28 -0400 (EDT)
-From: "David F. Skoll" <dfs@roaringpenguin.com>
-To: Tom Lane <tgl@sss.pgh.pa.us>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Christopher Kings-Lynne <chriskl@familyhealth.com.au>,
- pgsql-patches@postgresql.org
-Subject: Re: [PATCHES] Patch for pg_dump: Multiple -t options and new -T
- option
-In-Reply-To: <8489.1090420787@sss.pgh.pa.us>
-Message-ID: <Pine.LNX.4.58.0407211056450.8830@shishi.roaringpenguin.com>
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- <Pine.LNX.4.58.0407211018510.8830@shishi.roaringpenguin.com>
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-On Wed, 21 Jul 2004, Tom Lane wrote:
-
-> pg_dump -t s1.t1 -t s2.t2 -- Dump s1.t1 and s2.t2
-
-That's a good idea, but then it's questionable whether we need the -n
-switch at all. It might be simpler to extend the -t switch to
-accept:
-
- pg-dump -t 's1.*'
-
-rather than using a -n switch. Of course, that breaks
-backward-compatibility.
-
-Regards,
-
-David.
-
-From pgsql-patches-owner+M12047=pgman=candle.pha.pa.us@postgresql.org Wed Jul 21 11:11:15 2004
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-Subject: Re: [PATCHES] Patch for pg_dump: Multiple -t options and new -T option
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-
-"David F. Skoll" <dfs@roaringpenguin.com> writes:
-> On Wed, 21 Jul 2004, Tom Lane wrote:
->> pg_dump -t s1.t1 -t s2.t2 -- Dump s1.t1 and s2.t2
-
-> That's a good idea, but then it's questionable whether we need the -n
-> switch at all.
-
-Sure we do --- for backwards compatibility if nothing else.
-
-> It might be simpler to extend the -t switch to accept:
-> pg-dump -t 's1.*'
-
-That would not be the same thing --- that would mean to dump *only tables*
-from s1, rather than objects of all types. Anyway, I think it's a bit
-late in this cycle to be proposing to implement wild-card matching.
-Maybe for next time someone can do that, but for 7.5 I think we should
-limit ourselves to cleaning up any design flaws of the already-submitted
-patch.
-
- regards, tom lane
-
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-From glenebob@nwlink.com Tue Aug 17 21:15:39 2004
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-From: "Glen Parker" <glenebob@nwlink.com>
-To: "Bruce Momjian" <pgman@candle.pha.pa.us>
-Subject: RE: [GENERAL] pg_dump feature request: Exclude tables?
-Date: Tue, 17 Aug 2004 18:16:27 -0700
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-
-> No, we have:
->
-> * Allow pg_dump to use multiple -t and -n switches
->
-> This should be done by allowing a '-t schema.table' syntax.
->
-> but that doesn't have the exclude option. We had a patch that
-> implemented an exclude but got confused over how it would interact with
-> the schema switch and stuff. However, with the new '-t schema.table'
-> syntax we might be able to get it working.
-
-Hmm, while you're at it, maybe you could make it accept wild cards or regexp
-or something :-) That should allow you to toss the -n parameter altogether
-(schema.*) if you wanted to.
-
-It would also be at least as good, IMO, to accept only one -t option,
-re-defined as a comma-seperated list of names... And an exlusion parameter
-defined the same way.
-
-Glen Parker
-glenebob@nwlink.com
-
-From pgsql-general-owner+M64307=pgman=candle.pha.pa.us@postgresql.org Tue Aug 17 21:20:57 2004
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-Date: Tue, 17 Aug 2004 21:23:56 -0400
-From: Paul Tillotson <pntil@shentel.net>
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-Subject: Re: [GENERAL] pg_dump feature request: Exclude tables?
-References: <AJEKKAIECKNMBCEKADJPKENCCMAA.glenebob@nwlink.com>
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-
-I second this. I would prefer an option to dump only the schema of
-certain tables rather than excluding them altogether.
-
-Paul
-
-
-Glen Parker wrote:
-
->Since pg_dump will be allowing multiple -t <table> parameters for 8.0, here
->is a related feature request.
->
->A similar option (allowing multiples also) to EXCLUDE tables, so we can do a
->dump of the entire database minus a few tables.
->
->Glen Parker
->glenebob@nwlink.com
->
->
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->
->
->
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-Date: Wed, 18 Aug 2004 09:11:19 -0700
-From: Chris Travers <chris@travelamericas.com>
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-Subject: Re: [GENERAL] pg_dump feature request: Exclude tables?
-References: <AJEKKAIECKNMBCEKADJPKENHCMAA.glenebob@nwlink.com>
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-Glen Parker wrote:
-
->>No, we have:
->>
->> * Allow pg_dump to use multiple -t and -n switches
->>
->> This should be done by allowing a '-t schema.table' syntax.
->>
->>but that doesn't have the exclude option. We had a patch that
->>implemented an exclude but got confused over how it would interact with
->>the schema switch and stuff. However, with the new '-t schema.table'
->>syntax we might be able to get it working.
->>
->>
->
->Hmm, while you're at it, maybe you could make it accept wild
->cards or regexp or something :-) That should allow you to toss
->the -n parameter altogether (schema.*) if you wanted to.
->
->It would also be at least as good, IMO, to accept only one -t
->option, re-defined as a comma-seperated list of names... And an
->exlusion parameter defined the same way.
->
->
->
-How would this interact with the shell? It seems like a supportability
-issue if we have to require single quotes around such arguments.
-
-Best Wishes,
-Chris Travers
-Metatron Technology Consulting
-
-
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-From: "Glen Parker" <glenebob@nwlink.com>
-To: "Postgres General" <pgsql-general@postgresql.org>
-Subject: Re: [GENERAL] pg_dump feature request: Exclude tables?
-Date: Wed, 18 Aug 2004 12:11:03 -0700
-Message-ID: <AJEKKAIECKNMBCEKADJPOEOPCMAA.glenebob@nwlink.com>
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-> >Hmm, while you're at it, maybe you could make it accept wild
-> >cards or regexp or something :-) That should allow you to toss
-> >the -n parameter altogether (schema.*) if you wanted to.
-> >
-> >It would also be at least as good, IMO, to accept only one -t
-> >option, re-defined as a comma-seperated list of names... And an
-> >exlusion parameter defined the same way.
-> >
-> How would this interact with the shell? It seems like a supportability
-> issue if we have to require single quotes around such arguments.
-
-I think wild cards would be extremely useful, but you're right, it can't be
-required for common cases. Maybe "-t schema." could be shorthand for "-t
-schema.*".
-
-As far as the comma-seperated-list notion, I could take it or leave it. But
-it absolutely does not require quoting unless you add superfluous
-whitespace. That's just common, basic shell usage.
-
-Glen Parker
-glenebob@nwlink.com
-
-
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-Subject: Re: [GENERAL] pg_dump feature request: Exclude tables?
-From: Oliver Elphick <olly@lfix.co.uk>
-Reply-To: olly@lfix.co.uk
-To: Glen Parker <glenebob@nwlink.com>
-cc: Postgres General <pgsql-general@postgresql.org>
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-On Wed, 2004-08-18 at 20:11, Glen Parker wrote:
-> > >Hmm, while you're at it, maybe you could make it accept wild
-> > >cards or regexp or something :-) That should allow you to toss
-> > >the -n parameter altogether (schema.*) if you wanted to.
-> > >
-> > >It would also be at least as good, IMO, to accept only one -t
-> > >option, re-defined as a comma-seperated list of names... And an
-> > >exlusion parameter defined the same way.
-> > >
-> > How would this interact with the shell? It seems like a supportability
-> > issue if we have to require single quotes around such arguments.
->
-> I think wild cards would be extremely useful, but you're right, it can't be
-> required for common cases. Maybe "-t schema." could be shorthand for "-t
-> schema.*".
-
-Anyone who uses shell commands must already be familiar with the need to
-quote wildcard characters which are not meant for the shell. One major
-utility which requires this is find; others that spring to mind are dpkg
--l and mmv. Anyone who doesn't get it will very soon be educated; I
-don't see this issue as a reason not to use such wildcards.
-
-Oliver Elphick
-
-
-
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-From tgl@sss.pgh.pa.us Sun Jan 16 23:24:17 2005
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-To: Neil Conway <neilc@samurai.com>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
- pgsql-hackers <pgsql-hackers@postgresql.org>
-Subject: Re: [HACKERS] pgdump
-In-Reply-To: <1105937990.22946.17.camel@localhost.localdomain>
-References: <200501170442.j0H4gNW23506@candle.pha.pa.us> <1105937990.22946.17.camel@localhost.localdomain>
-Comments: In-reply-to Neil Conway <neilc@samurai.com>
- message dated "Mon, 17 Jan 2005 15:59:50 +1100"
-Date: Mon, 17 Jan 2005 00:24:07 -0500
-Message-ID: <23100.1105939447@sss.pgh.pa.us>
-From: Tom Lane <tgl@sss.pgh.pa.us>
-Status: OR
-
-Neil Conway <neilc@samurai.com> writes:
-> Something like the design elaborated here:
-
-> http://archives.postgresql.org/pgsql-patches/2004-07/msg00374.php
-
-> looks good to me, and would be preferrable to Andreas' patch IMHO.
-> Unless I'm missing something, I don't see a patch from David Skoll in
-> that thread that actually implements the above behavior. I'd be happy to
-> implement Tom's suggested design for 8.1 unless someone has already
-> beaten me to it.
-
-A little further down-thread there was some discussion of also allowing
-wild cards in the individual switches, eg
-
- -t 's1.*'
-
-(This would differ from '-n s1' in that a -t switch would restrict the
-dump to tables only, whereas -n should take every sort of object in the
-selected schema.) I dismissed it at the time because we were too close
-to feature freeze, but the idea should be considered if you're going to
-do a new patch for 8.1. I think the issues would be
-
-* what are the wildcard rules exactly?
-* what about quoting/downcasing rules?
-
-Possibly it's sufficient to say "just like the way \d works in psql",
-but we should look closely before leaping. We've been burnt before
-by choosing rules that turned out to be awkward to use on a shell
-command line because of interference from the shell's quoting and
-expansion behavior.
-
- regards, tom lane
-
-From pgsql-hackers-owner+M63178=pgman=candle.pha.pa.us@postgresql.org Sun Jan 16 23:47:33 2005
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- Mon, 17 Jan 2005 00:44:57 -0500 (EST)
-Subject: Re: [HACKERS] pgdump
-From: Neil Conway <neilc@samurai.com>
-To: Tom Lane <tgl@sss.pgh.pa.us>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
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- <1105937990.22946.17.camel@localhost.localdomain>
- <23100.1105939447@sss.pgh.pa.us>
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-Date: Mon, 17 Jan 2005 16:43:18 +1100
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-
-On Mon, 2005-01-17 at 00:24 -0500, Tom Lane wrote:
-> A little further down-thread there was some discussion of also allowing
-> wild cards in the individual switches, eg
->
-> -t 's1.*'
->
-> (This would differ from '-n s1' in that a -t switch would restrict the
-> dump to tables only, whereas -n should take every sort of object in the
-> selected schema.)
-
-Is this actually useful behavior? My gut feeling is "no", but I'm open
-to debate. ISTM that the combination of "-n" and "-t" achieves a pretty
-wide swath of the desired functionality. Considering that the various
-combinations of these switches is already quite complex, I think it
-would be wise to avoid additional, unnecessary complications. Plus it
-avoids the need to play games with escaping the wildcard from the shell.
-
-> * what about quoting/downcasing rules?
-
-If we don't implement wildcards, I don't believe we will need to change
-the present behavior of the "-n" and "-t" switches WRT case conversion
-etc.
-
--Neil
-
-
-
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- Mon, 17 Jan 2005 00:54:23 -0500 (EST)
-To: Neil Conway <neilc@samurai.com>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
- pgsql-hackers <pgsql-hackers@postgresql.org>
-Subject: Re: [HACKERS] pgdump
-In-Reply-To: <1105940598.22946.32.camel@localhost.localdomain>
-References: <200501170442.j0H4gNW23506@candle.pha.pa.us> <1105937990.22946.17.camel@localhost.localdomain> <23100.1105939447@sss.pgh.pa.us> <1105940598.22946.32.camel@localhost.localdomain>
-Comments: In-reply-to Neil Conway <neilc@samurai.com>
- message dated "Mon, 17 Jan 2005 16:43:18 +1100"
-Date: Mon, 17 Jan 2005 00:54:22 -0500
-Message-ID: <23360.1105941262@sss.pgh.pa.us>
-From: Tom Lane <tgl@sss.pgh.pa.us>
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-Neil Conway <neilc@samurai.com> writes:
-> On Mon, 2005-01-17 at 00:24 -0500, Tom Lane wrote:
->> A little further down-thread there was some discussion of also allowing
->> wild cards in the individual switches,
-
-> Is this actually useful behavior?
-
-Possibly not. It's been requested often enough, but multiple -t and -n
-switches might be sufficient.
-
->> * what about quoting/downcasing rules?
-
-> If we don't implement wildcards, I don't believe we will need to change
-> the present behavior of the "-n" and "-t" switches WRT case conversion
-> etc.
-
-I'm not sure you can ignore the issue completely. The proposal you're
-supporting included being able to pick out a specific table with
- -t s1.t1
-and without any quoting rules it would then become impossible to deal
-with names containing dots. Are we willing to blow off that case?
-Or is it better to drop that part of the proposal?
-
- regards, tom lane
-
----------------------------(end of broadcast)---------------------------
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-From neilc@samurai.com Mon Jan 17 00:11:03 2005
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- Mon, 17 Jan 2005 01:10:50 -0500 (EST)
-Subject: Re: [HACKERS] pgdump
-From: Neil Conway <neilc@samurai.com>
-To: Tom Lane <tgl@sss.pgh.pa.us>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
- pgsql-hackers <pgsql-hackers@postgresql.org>
-In-Reply-To: <23360.1105941262@sss.pgh.pa.us>
-References: <200501170442.j0H4gNW23506@candle.pha.pa.us>
- <1105937990.22946.17.camel@localhost.localdomain>
- <23100.1105939447@sss.pgh.pa.us>
- <1105940598.22946.32.camel@localhost.localdomain>
- <23360.1105941262@sss.pgh.pa.us>
-Content-Type: text/plain
-Date: Mon, 17 Jan 2005 17:09:10 +1100
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-Status: OR
-
-On Mon, 2005-01-17 at 00:54 -0500, Tom Lane wrote:
-> -t s1.t1
-> [...] without any quoting rules it would then become impossible to
-> deal with names containing dots.
-
-Ah, yeah -- sorry, I was focusing on case conversion rather than quoting
-in general.
-
-> Are we willing to blow off that case?
-> Or is it better to drop that part of the proposal?
-
-I would be OK with just ignoring this case, but on reflection I would
-prefer removing the "-t schema.table" syntax. Removing the feature
-resolves the quoting issue and also simplifies pg_dump's behavior. We
-lose the ability to dump table t1 in schema s1 and table t2 in schema s2
-in a single command, but
-
-(a) you can specify "-t t1 -t t2 -n s1 -n s2", although this might also
-dump t1.s2 and/or t2.s1
-
-(b) you can just run pg_dump twice, specifying the appropriate -t and -n
-options each time
-
-So the behavior would be that suggested earlier by David Skoll:
-
-> pg_dump -t t1 -- Dump table t1 in any schema
-> pg_dump -n s1 -- Dump all of schema s1
-> pg_dump -t t1 -n s1 -- Dump t1 in s1
-> pg_dump -t t1 -t t2 -n s1 -- Dump s1.t1 and s1.t2
-> pg_dump -t t1 -t t2 -n s1 -n s2 -- Dump s1.t1, s1.t2, s2.t1 and s2.t2
-
-We'd only raise an error if we found no matching tables/schemas, as was
-hashed out in July.
-
--Neil
-
-
-From tgl@sss.pgh.pa.us Mon Jan 17 00:19:43 2005
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- Mon, 17 Jan 2005 01:19:36 -0500 (EST)
-To: Neil Conway <neilc@samurai.com>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
- pgsql-hackers <pgsql-hackers@postgresql.org>
-Subject: Re: [HACKERS] pgdump
-In-Reply-To: <1105942150.22946.46.camel@localhost.localdomain>
-References: <200501170442.j0H4gNW23506@candle.pha.pa.us> <1105937990.22946.17.camel@localhost.localdomain> <23100.1105939447@sss.pgh.pa.us> <1105940598.22946.32.camel@localhost.localdomain> <23360.1105941262@sss.pgh.pa.us> <1105942150.22946.46.camel@localhost.localdomain>
-Comments: In-reply-to Neil Conway <neilc@samurai.com>
- message dated "Mon, 17 Jan 2005 17:09:10 +1100"
-Date: Mon, 17 Jan 2005 01:19:36 -0500
-Message-ID: <23582.1105942776@sss.pgh.pa.us>
-From: Tom Lane <tgl@sss.pgh.pa.us>
-Status: OR
-
-Neil Conway <neilc@samurai.com> writes:
-> So the behavior would be that suggested earlier by David Skoll:
-
->> pg_dump -t t1 -- Dump table t1 in any schema
->> pg_dump -n s1 -- Dump all of schema s1
->> pg_dump -t t1 -n s1 -- Dump t1 in s1
->> pg_dump -t t1 -t t2 -n s1 -- Dump s1.t1 and s1.t2
->> pg_dump -t t1 -t t2 -n s1 -n s2 -- Dump s1.t1, s1.t2, s2.t1 and s2.t2
-
-Well, that at least obeys the KISS principle ;-). Sure, let's try that
-and see if it satisfies people.
-
-Just to be clear: what I understand the logic to be is "OR" across
-multiple switches of the same type, but "AND" across switches of
-two types.
-
- regards, tom lane
-
-From pgsql-hackers-owner+M63184=pgman=candle.pha.pa.us@postgresql.org Mon Jan 17 00:50:05 2005
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-Subject: Re: [HACKERS] pgdump
-From: Neil Conway <neilc@samurai.com>
-To: Tom Lane <tgl@sss.pgh.pa.us>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
- pgsql-hackers <pgsql-hackers@postgresql.org>
-In-Reply-To: <23582.1105942776@sss.pgh.pa.us>
-References: <200501170442.j0H4gNW23506@candle.pha.pa.us>
- <1105937990.22946.17.camel@localhost.localdomain>
- <23100.1105939447@sss.pgh.pa.us>
- <1105940598.22946.32.camel@localhost.localdomain>
- <23360.1105941262@sss.pgh.pa.us>
- <1105942150.22946.46.camel@localhost.localdomain>
- <23582.1105942776@sss.pgh.pa.us>
-Content-Type: text/plain
-Date: Mon, 17 Jan 2005 17:46:39 +1100
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-Status: OR
-
-On Mon, 2005-01-17 at 01:19 -0500, Tom Lane wrote:
-> Just to be clear: what I understand the logic to be is "OR" across
-> multiple switches of the same type, but "AND" across switches of
-> two types.
-
-If I understand you correctly, you're suggesting that we should only
-report an error if none of the specified tables exist OR none of the
-specified schemas exist. I'm not sure I agree. Consider this command:
-
-pg_dump -t some_table -t non_existent_table
-
-Assuming some_table exists, we will now blithely ignore the nonexistent
-table. That is perfectly reasonable because of the cartesian explosion
-of possibilities that occurs when both -t and -n are specified, but in
-the absence of that it seems regrettable. The same applies to "-n foo -n
-non_existent_schema", naturally.
-
-An easy fix would be to raise an error for each specified but
-nonexistent object, *except* if both "-n" and "-t" are specified, in
-which case we use your behavior (report an error if none of the
-specified tables are found OR none of the specified schemas are found).
-Perhaps better would be to require that each "-t" or "-n" switch results
-in a 'match' -- i.e. if you specify "-t foo -n x -n y", we check that
-
-(a) schema x exists AND
-(b) schema y exists AND
-(c) table foo exists in (schema x OR schema y)
-
-This means we have tighter error checking, although I'm not sure how
-intuitive it is.
-
--Neil
-
-
-
----------------------------(end of broadcast)---------------------------
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-From pgsql-hackers-owner+M63185=pgman=candle.pha.pa.us@postgresql.org Mon Jan 17 01:42:12 2005
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-To: Neil Conway <neilc@samurai.com>
-cc: Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
- pgsql-hackers <pgsql-hackers@postgresql.org>
-Subject: Re: [HACKERS] pgdump
-In-Reply-To: <1105944399.22946.74.camel@localhost.localdomain>
-References: <200501170442.j0H4gNW23506@candle.pha.pa.us> <1105937990.22946.17.camel@localhost.localdomain> <23100.1105939447@sss.pgh.pa.us> <1105940598.22946.32.camel@localhost.localdomain> <23360.1105941262@sss.pgh.pa.us> <1105942150.22946.46.camel@localhost.localdomain> <23582.1105942776@sss.pgh.pa.us> <1105944399.22946.74.camel@localhost.localdomain>
-Comments: In-reply-to Neil Conway <neilc@samurai.com>
- message dated "Mon, 17 Jan 2005 17:46:39 +1100"
-Date: Mon, 17 Jan 2005 02:40:19 -0500
-Message-ID: <24033.1105947619@sss.pgh.pa.us>
-From: Tom Lane <tgl@sss.pgh.pa.us>
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-Status: OR
-
-Neil Conway <neilc@samurai.com> writes:
-> On Mon, 2005-01-17 at 01:19 -0500, Tom Lane wrote:
->> Just to be clear: what I understand the logic to be is "OR" across
->> multiple switches of the same type, but "AND" across switches of
->> two types.
-
-> If I understand you correctly, you're suggesting that we should only
-> report an error if none of the specified tables exist OR none of the
-> specified schemas exist.
-
-No, I was only expressing an opinion about what should be dumped,
-not about what kind of diagnostic messages to issue.
-
-If you want to warn about switches that fail to match anything,
-go for it. (I vote for just a warning, though, not a hard error.)
-
- regards, tom lane
-
----------------------------(end of broadcast)---------------------------
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-To: Neil Conway <neilc@samurai.com>
-cc: Tom Lane <tgl@sss.pgh.pa.us>, Bruce Momjian <pgman@candle.pha.pa.us>,
- Andreas Joseph Krogh <andreak@officenet.no>, Enrico <scotty@linuxtime.it>,
- pgsql-hackers <pgsql-hackers@postgresql.org>
-Subject: Re: [HACKERS] pgdump
-References: <200501170442.j0H4gNW23506@candle.pha.pa.us> <1105937990.22946.17.camel@localhost.localdomain> <23100.1105939447@sss.pgh.pa.us> <1105940598.22946.32.camel@localhost.localdomain> <23360.1105941262@sss.pgh.pa.us> <1105942150.22946.46.camel@localhost.localdomain>
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-Status: OR
-
-Neil Conway wrote:
-
->I would be OK with just ignoring this case, but on reflection I would
->prefer removing the "-t schema.table" syntax. Removing the feature
->resolves the quoting issue and also simplifies pg_dump's behavior. We
->lose the ability to dump table t1 in schema s1 and table t2 in schema s2
->in a single command, but
->
->(a) you can specify "-t t1 -t t2 -n s1 -n s2", although this might also
->dump t1.s2 and/or t2.s1
->
->(b) you can just run pg_dump twice, specifying the appropriate -t and -n
->options each time
->
->So the behavior would be that suggested earlier by David Skoll:
->
->
->
->>pg_dump -t t1 -- Dump table t1 in any schema
->>pg_dump -n s1 -- Dump all of schema s1
->>pg_dump -t t1 -n s1 -- Dump t1 in s1
->>pg_dump -t t1 -t t2 -n s1 -- Dump s1.t1 and s1.t2
->>pg_dump -t t1 -t t2 -n s1 -n s2 -- Dump s1.t1, s1.t2, s2.t1 and s2.t2
->>
->>
->
->We'd only raise an error if we found no matching tables/schemas, as was
->hashed out in July.
->
->
-I really prefer the -t "schema.table" syntax over the scenario listed
-above. If you look at the syntax for psql "\" commands, and SQL
-commands, the structure "tablename, optionally schema-qualified" is seen
-time and time again. By allowing the same structure in arguments to
-pg_dump, you're helping add to an overall feeling of consistency in the
-postgres toolbox.
-
-My feeling is that, to an occasional or novice user of pg_dump, the
-proposed combination of -n and -t will seem daunting and idiosyncratic,
-especially for complex cases.
-
-The fact that with -n -t there are some cases that are actually
-impossible to perform in a single dump is quite a powerful disadvantage
-IMO. Yes, you *can* just run pg_dump multiple times, but I think anyone
-using pg_dump would rather quote out a wilcard than issue virtually the
-same command with one changed argument over and over again. Or writing
-a script to loop through the desired schema/table combinations and
-dumping each one at a time.
-
-Is command line quoting really that much of a hassle? And if so, what
-are the major hurdles?
-
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