Oracle FAQ | Your Portal to the Oracle Knowledge Grid |
![]() |
![]() |
Home -> Community -> Mailing Lists -> Oracle-L -> RE: Unindexed foreign key
Whenever You Modify the Parent Table rows the Child Table is Entirely
Locked so that no DML Takes Place.
Also If there are no Indexes on the FK. Oracle Will have to do a FTS for all the Quries that you are going to Join with the Parent Table.
HTH
Best Regards,
Ganesh R
Tel : +971 (4) 397 3337 Ext 420 Fax : +971 (4) 397 6262 HP : +971 (50) 745 6019 ==========================================Live to learn... forget... and learn again.
Hi Gurus!
How does the unindexed foreign key affect the performance ?
regards....
Shishir Kumar Mishra
Agni Software (P) Ltd.
www.agnisoft.com
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Ganesh Raja
INET: rlnsimha_at_emirates.net.ae
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 Jul 11 2002 - 08:18:20 CDT
![]() |
![]() |