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Home -> Community -> Mailing Lists -> Oracle-L -> RE: adding a check condition
There would be a overhead on both trigger and a check constraint. Constraint
would be better than a trigger this is based on testing done some time ago.
Thx
Gautam Reddy
728-3656(512)
gautam_reddy_at_dell.com
www.dell.com
-----Original Message-----
From: Rachel Carmichael [mailto:carmichr_at_hotmail.com]
Sent: Tuesday, June 13, 2000 6:45 AM
To: Multiple recipients of list ORACLE-L
Subject: Re: adding a check condition
yes it adds to the overhead! and it will affect performance on every insert and update. Oracle has to get the check condition from the data dictionary.
since you want this check on EVERY column, it might be faster to do it all at once in a before-insert/before-update trigger.
Rachel
>From: "Anand Raman" <araman_at_india-today.com>
>Reply-To: ORACLE-L_at_fatcity.com
>To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
>Subject: adding a check condition
>Date: Mon, 12 Jun 2000 22:57:04 -0800
>
>Hi guys
>In a database which i am desiging to prevent users from entering blank
>spaces into columns i am also
>adding a check condition like check column <> ' ' to almost every column..
>Does this add to the overhead of the table and will it have any performance
>effect ..
>Thanx
>Anand
>
>--
>Author: Anand Raman
> INET: araman_at_india-today.com
>
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-- Author: Rachel Carmichael INET: carmichr_at_hotmail.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).Received on Tue Jun 13 2000 - 12:16:29 CDT
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