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Home -> Community -> Mailing Lists -> Oracle-L -> RE: DEFERRED FK Constraint
I do not think Oracle will design it this way.
If it's me who put the design I will validate normally during any DML and
mark the records that do not satify the constraint to be checked at a later
stage (commit time).
Regards,
Waleed
-----Original Message-----
To: Multiple recipients of list ORACLE-L
Sent: 4/4/02 6:53 AM
Hi all,
When testing behaviour of INITIALLY DEFERRED foreign key constraints I'm
confused by the following behaviour and I'd appreciate any interpretation!
I create the FK constraint on a column in a 1 million row table. This
works OK - if I update individual entries to nonsense values, there is
no
error until I try to commit. So far so good.
However, if I do an UPDATE which affects all rows, and then commit, the
commit returns immediately (provided the UPDATE is to correct values,
not
nonsense). Why is there no delay whilst validating the million
rows? (Certainly it takes several seconds to create the constraint in
the
first place).
Any insight welcome!
Thanks
- Bill.
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Bill Buchan
INET: wbuchan_at_uk.intasys.com
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists --------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists --------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Thu Apr 04 2002 - 08:18:41 CST
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