am Wed, dem 02.04.2008, um 11:56:38 +0800 mailte Michael Enke folgendes:
> Hi all,
> I need to know if multiple tables have (may have most probably) identical
> content.
> Since I want a fast solution (which means not comparing tables row by row),
> I thought it would be a good idea to have an sql function operating on a
> table or view
> similar to md5sum on a file and only compare the generated hashes.
> I did not find such a function in the documentation.
>
> Is such a function already available?
No.
> If not, does it make no sense to use such an approach?
I think, no, because there is no order in the tables and there are maybe
dead tuples (MVCC) -> different md5-sums for the data files.
Andreas
--
Andreas Kretschmer
Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net