All the raws are updated if there is no WHERE clause.
If you want the UPADATED rows, just specify the WHERE clause and it will
really improve your performance...
EX : UPDATE itemp SET name = replace( name, 'abc', 'def' ) WHERE name LIKE
'%abc%'
----------------------------------------------------------------------------
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Patrick Fiche
email : patrick.fiche@aqsacom.com
tél : 01 69 29 36 18
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-----Original Message-----
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org]On Behalf Of CSN
Sent: lundi 8 août 2005 09:33
To: pgsql-general@postgresql.org
Subject: [GENERAL] Getting actual number of rows updated
Is it possible to have PG report the actual number of
rows that actually CHANGED in an update command? e.g.
UPDATE items set name=replace(name,'abc','def');
UPDATE 9000 -- Actually only 3 were changed
rather than update reporting all rows have been
"updated"?
Thanks,
CSN
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
