Re: How to determine the Oracle session's constraint state?
From: John Peterson <j0hnp_at_comcast.net>
Date: Tue, 9 Feb 2010 13:49:30 -0700
Message-ID: <SM-dnf2DM_dAV-zWnZ2dnUVZ_t6dnZ2d_at_giganews.com>
>> "Mark D Powell" <Mark.Powe..._at_hp.com> wrote in
>> messagenews:63f31d18-8229-43b2-9fbb-1c79cb5bdefc_at_l26g2000yqd.googlegroups.com...
>>
>>
>>
>> > On Feb 8, 12:08 pm, "John Peterson" <j0..._at_comcast.net> wrote:
>> >> Hello!
>>
>> >> First time poster in this forum -- please forgive me if this is the
>> >> wrong
>> >> place for my question. I've exhausted a web search on this issue, and
>> >> was
>> >> hoping that this might be a more targeted approach.
>>
>> >> I am trying to programmatically determine the current session's
>> >> constraint
>> >> state (immediate, deferred, or default).
>>
>> >> I have a procedure that I'd like to implement which would essentially
>> >> temporarily set the constraints "deferred" (e.g. SET CONSTRAINTS ALL
>> >> DEFERRED), perform some work, and then restore the constraint setting
>> >> to
>> >> the
>> >> original state (e.g., immediate). However, I'm having a difficult
>> >> time
>> >> identifying how to determine the current state of the constraints.
>>
>> >> Any help would be very much appreciated!
>>
>> >> Kind regards,
>>
>> >> John Peterson
>>
>> > See the DEFERRABLE and DEFERRED columns in the ALL_, USER_, or
>> > DBA_CONSTRAINTS views (documented in the Oracle version# Reference
>> > manual).
>>
>> > By the way making a PK or UK deferrable would require use of a non-
>> > unique index to support the constraint instead of the standard unique
>> > index.
>>
>> > HTH -- Mark D Powell --
>>
>> Thanks, Mark!
>>
>> Unfortunately, those metadata views don't seem to reflect the current
>> session state.
>>
>> That is, if I have some FKs that are deferrable (but initially immediate)
>> (e.g., CONSTRAINT_TYPE = 'R'), it will show DEFERRABLE/IMMEDIATE in the
>> DEFERRABLE/DEFERRED columns.
>>
>> But, after I run:
>>
>> SET CONSTRAINTS ALL DEFERRED
>>
>> Those columns are still DEFERRABLE/IMMEDIATE in the metadata views.
>>
>> I had thought maybe I could obtain this information from the SYS_CONTEXT
>> function to get the current session state information, but none of the
>> options seem applicable.
>>
>> Any other ideas?
Date: Tue, 9 Feb 2010 13:49:30 -0700
Message-ID: <SM-dnf2DM_dAV-zWnZ2dnUVZ_t6dnZ2d_at_giganews.com>
"joel garry" <joel-garry_at_home.com> wrote in message news:9b55d403-2ff0-47bc-a21f-3713f51bfd7c_at_e19g2000prn.googlegroups.com...
> On Feb 8, 10:09 am, "John Peterson" <j0..._at_comcast.net> wrote:
>> "Mark D Powell" <Mark.Powe..._at_hp.com> wrote in
>> messagenews:63f31d18-8229-43b2-9fbb-1c79cb5bdefc_at_l26g2000yqd.googlegroups.com...
>>
>>
>>
>> > On Feb 8, 12:08 pm, "John Peterson" <j0..._at_comcast.net> wrote:
>> >> Hello!
>>
>> >> First time poster in this forum -- please forgive me if this is the
>> >> wrong
>> >> place for my question. I've exhausted a web search on this issue, and
>> >> was
>> >> hoping that this might be a more targeted approach.
>>
>> >> I am trying to programmatically determine the current session's
>> >> constraint
>> >> state (immediate, deferred, or default).
>>
>> >> I have a procedure that I'd like to implement which would essentially
>> >> temporarily set the constraints "deferred" (e.g. SET CONSTRAINTS ALL
>> >> DEFERRED), perform some work, and then restore the constraint setting
>> >> to
>> >> the
>> >> original state (e.g., immediate). However, I'm having a difficult
>> >> time
>> >> identifying how to determine the current state of the constraints.
>>
>> >> Any help would be very much appreciated!
>>
>> >> Kind regards,
>>
>> >> John Peterson
>>
>> > See the DEFERRABLE and DEFERRED columns in the ALL_, USER_, or
>> > DBA_CONSTRAINTS views (documented in the Oracle version# Reference
>> > manual).
>>
>> > By the way making a PK or UK deferrable would require use of a non-
>> > unique index to support the constraint instead of the standard unique
>> > index.
>>
>> > HTH -- Mark D Powell --
>>
>> Thanks, Mark!
>>
>> Unfortunately, those metadata views don't seem to reflect the current
>> session state.
>>
>> That is, if I have some FKs that are deferrable (but initially immediate)
>> (e.g., CONSTRAINT_TYPE = 'R'), it will show DEFERRABLE/IMMEDIATE in the
>> DEFERRABLE/DEFERRED columns.
>>
>> But, after I run:
>>
>> SET CONSTRAINTS ALL DEFERRED
>>
>> Those columns are still DEFERRABLE/IMMEDIATE in the metadata views.
>>
>> I had thought maybe I could obtain this information from the SYS_CONTEXT
>> function to get the current session state information, but none of the
>> options seem applicable.
>>
>> Any other ideas?
> > http://forums.oracle.com/forums/thread.jspa?messageID=3575293 > > Although I personally would have expected the > user_constraints.deferred column to reflect that. Is that a bug or > documentation insufficiency? > > Give some ddl/dml so we can all be sure to be on the same page. > > jg > -- > _at_home.com is bogus. > http://ostatic.com/blog/oracle-cuts-affect-gnome-accessibility-work
AHA! That's *exactly* what I'm looking for! Thank you!
Can I create a view based off of this x$ view, that I can then grant to a "standard" user of the system? I'm guessing so...but I guess I'll play around. :-) Received on Tue Feb 09 2010 - 14:49:30 CST