Обсуждение: Bug #743: pg_dump -a -c without DELETE FROM
Przemyslaw Sztoch (psztoch@interia.pl) reports a bug with a severity of 3 The lower the number the more severe it is. Short Description pg_dump -a -c without DELETE FROM Long Description In my opinion "pg_dump -a -c" should generate "DELETE FROM <table>" before COPY statement. Options: -a, --data-only dump only the data, not the schema -c, --clean clean (drop) schema prior to create TIA for answer or your opinions. Sample Code No file was uploaded with this report
At 10:40 22/08/2002 -0400, pgsql-bugs@postgresql.org wrote:
> -c, --clean clean (drop) schema prior to create
Given that it is dropping the table, it does not really need to do a delete.
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Philip Warner <pjw@rhyme.com.au> writes:
> Given that it is dropping the table, it does not really need to do a delete.
But with -a it won't do the drop (I hope).
The combination -a -c seems rather useless to me, and I'd vote for
throwing an error. I don't think emitting DELETE FROM would be very
useful in practice (at least not without a VACUUM) so I'm not in
favor of that.
regards, tom lane
The following patch disables use of -a and -c together. This will appear in the next release. --------------------------------------------------------------------------- pgsql-bugs@postgresql.org wrote: > Przemyslaw Sztoch (psztoch@interia.pl) reports a bug with a severity of 3 > The lower the number the more severe it is. > > Short Description > pg_dump -a -c without DELETE FROM > > Long Description > In my opinion "pg_dump -a -c" should generate "DELETE FROM <table>" before COPY statement. > Options: > -a, --data-only dump only the data, not the schema > -c, --clean clean (drop) schema prior to create > TIA for answer or your opinions. > > Sample Code > > > No file was uploaded with this report > > > ---------------------------(end of broadcast)--------------------------- > TIP 2: you can get off all lists at once with the unregister command > (send "unregister YourEmailAddressHere" to majordomo@postgresql.org) > -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 Index: src/bin/pg_dump/pg_dump.c =================================================================== RCS file: /cvsroot/pgsql-server/src/bin/pg_dump/pg_dump.c,v retrieving revision 1.291 diff -c -c -r1.291 pg_dump.c *** src/bin/pg_dump/pg_dump.c 22 Aug 2002 21:35:50 -0000 1.291 --- src/bin/pg_dump/pg_dump.c 27 Aug 2002 20:33:50 -0000 *************** *** 467,472 **** --- 467,478 ---- exit(1); } + if (dataOnly && outputClean) + { + write_msg(NULL, "The options \"clean\" (-c) and \"data only\" (-a) cannot be used together.\n"); + exit(1); + } + if (outputBlobs && selectTablename != NULL && strlen(selectTablename) > 0) { write_msg(NULL, "Large object output is not supported for a single table.\n");
Witam Philip Warner! 22 sierpnia 2002, 16:49:47, zostało napisane: >> -c, --clean clean (drop) schema prior to create PW> Given that it is dropping the table, it does not really need to do a delete. --- Ok. But I am talking about "pg_dump -a -c", not about "pg_dump -c". When I am unloading data only, I can't drop my table! --- Przemysław Sztoch, LTC Sp. z o.o. psztoch@finn.pl, http://www.finn.pl, +48 (42) 684-98-91
> Witam Philip Warner! > > 22 sierpnia 2002, 16:49:47, zosta³o napisane: > >> -c, --clean clean (drop) schema prior to create > > PW> Given that it is dropping the table, it does not really need to do a delete. > --- > Ok. But I am talking about "pg_dump -a -c", not about "pg_dump -c". > When I am unloading data only, I can't drop my table! Well, the -a -c options only control what happens when the data is reloaded. It doesn't do anything to the database it is dumping. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073