I said something like "the way the unique constraints work".
Ok. Here's my context.
I have a table say intervals and 2 columns start_time and end_time.
I want to check for overlapped intervals.
I know what conditions to check but I can't implement them.
Thanks!
iulian
-----Original Message-----
Sent: Tuesday, June 04, 2002 5:13 PM
To: Multiple recipients of list ORACLE-L
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Hi
if unique does not suit your need what exactly do you need to check?
duplicates: use primary key
Jack
Iulian.ILIES@oran
ge.ro To: Multiple recipients
of list ORACLE-L <[EMAIL PROTECTED]>
Sent by: cc: (bcc: Jack van
Zanen/nlzanen1/External/MEY/NL)
[EMAIL PROTECTED] Subject: Complex Integrity
Checking
04-06-2002 15:58
Please respond to
ORACLE-L
Hi guys. Here's my problem.
I want to check the new values (when inserting&updating a table) against
the
ones in the existing rows. Something like checking for duplicate values,
but
using a unique constraint doesn't suit my needs.
I think of a before insert&update trigger, wherein checking my condition
and
raise a error if not valid. The problem is, in case of an update statement,
I get the mutating "ORA-04091 table <my table> is mutating....".
I read a lot of doc but I didn't find any helping ideas. Can you give me
some, or maybe a new approach to this kind of problem?
Thanks in advance!
iulian
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