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From: "Chris Jack" <jackc at rabo-bank dot com>
Subject: RE: DBCOUNT
Date: Nov 30 1998 10:06AM
There is a change request to Sybase in here.
Sybase (and Oracle) should both know how many rows are in the result set if
you have done something that requires a work table. For example when you do
an appropriate sort or an amalgamation. I believe SQLBase (which has a
better concept of a result set than Sybase/Oracle) has this facility. It
may be that there are technical reasons why this is hard for certain
physical database configurations specific to Sybase however... you could
have a call that returned the number of rows when it is possible or an
unavailable flag (plus a disclaimer in the documentation about the
limitations of usage).
From: Michael Peppler [SMTP:email@example.com]
Sent: Friday, November 27, 1998 5:27 PM
To: SybPerl Discussion List
Dave Waller writes:
> I must be using this wrong because I get -1 for the value.
> So.. How do you really use DBCOUNT
[ I think I'm going to write an autoresponder that replies to DBCOUNT
queries automatically... ]
DBCOUNT() returns the number of rows affected for update/insert/delete
For select statements all the rows need to be processed (via
dbnextrow) before DBCOUNT() can return the correct value. This is
normal and is due to the way RDBMS engines handle datasets internally
(ie the information is not available) This BTW is not a Sybase
limitation, Oracle works the same way.
Michael Peppler -||- Data Migrations Inc.
firstname.lastname@example.org -||- http://www.mbay.net/~mpeppler
Int. Sybase User Group -||- http://www.isug.com
Sybase on Linux mailing list: email@example.com