RE: a theoretical question

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Mon, 08 Apr 2002 05:38:22 -0800
Message-ID: <F001.0043E318.20020408053822@fatcity.com>

It will perform the update regardless of current value of the column. The value checking is only done if

1. You have specified a where clause
2. There is a check constraint that would require such check
3. You have a explicit condition check in pre or post update trigger that would require it.

Raj

---

Rajendra Jamadagni MIS, ESPN Inc.
Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.

QOTD: Any clod can have facts, but having an opinion is an art!

-----Original Message-----
Sent: Monday, April 08, 2002 9:23 AM
To: Multiple recipients of list ORACLE-L

Deart gurus !
I'm just wondering what happens in this situation : i issue the following SQL :
update AAA set BBB=0 where ROWID='XXXXXXXXX' ; Now , if the value of the BBB column is already 0 for the given row (or a set of rows) , what will actually happen behind the curtains ? I mean, will Oracle somehow detect that actually the update does not need to occur , or will it perform the update regardless of the current values of the columns .

Thanks a lot,
DBAndrey

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Author: Andrey Bronfin
  INET: andreyb_at_elrontelesoft.com

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Author: Jamadagni, Rajendra
  INET: Rajendra.Jamadagni_at_espn.com

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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 Mon Apr 08 2002 - 08:38:22 CDT