How to tell if a MQT is maintained by USER or SYSTEM

**Bob [IBM]** · Nov 12 '05, 05:39 AM

Re: How to tell if a MQT is maintained by USER or SYSTEM

I am curious, what does the CONST_CHECKED column in SYSCAT.TABLES tell you? Is it different or does it say anything?

CONST_CHECKED CHAR(32) Byte 1 represents foreign key constraints.

Byte 5 represents materialized query table.

Encodes constraint information on checking. Values:

Y = Checked by system

U = Checked by user

F = In byte 5, the materialized query table cannot be refreshed incrementally.

--

Bob
Consulting I/T Specialist
IBM Toronto Lab
IBM Software Services for Data Management
[My comments are solely my own and are not meant to represent an official IBM position - ask my cat!]

"Fan Ruo Xin" <fanruox@sbcglo bal.net> wrote in message news:3F972C60.A 39323AB@sbcglob al.net...

Please don't tell me using DB2LOOK.
I only found the following difference when I checked the SYSCAT.TABLES.
tabname TYPE STATUS PROPERTY
-------- ---- ------ --------------------------------
USRMQT S N Y
SYSMQT S N
2 record(s) selected.
PROPERTY VARCHAR(32) Properties for the table. A single blank indicates
that the table has no properties.
But from the explanation for the PROPERTY, I am not sure if I can depend
on this.

Thanks,
FRX

**Fan Ruo Xin** · Nov 12 '05, 05:39 AM

Re: How to tell if a MQT is maintained by USER or SYSTEM

Thanks, Bob,
I will check tomorrow.

"Bob [IBM]" wrote:
[color=blue]
> I am curious, what does the CONST_CHECKED column in SYSCAT.TABLES tell
> you? Is it different or does it say anything? CONST_CHECKED CHAR(32)
> Byte 1 represents foreign key constraints.
>
> Byte 5 represents materialized query table.
>
> Encodes constraint information on checking. Values:
>
> Y = Checked by system
>
> U = Checked by user
>
> F = In byte 5, the materialized query table cannot be refreshed
> incrementally.
>
> --
>
> Bob
> Consulting I/T Specialist
> IBM Toronto Lab
> IBM Software Services for Data Management
> [My comments are solely my own and are not meant to represent an
> official IBM position - ask my cat!]
>
> "Fan Ruo Xin" <fanruox@sbcglo bal.net> wrote in message
> news:3F972C60.A 39323AB@sbcglob al.net...
>
>
> Please don't tell me using DB2LOOK.
> I only found the following difference when I checked the
> SYSCAT.TABLES.
> tabname TYPE STATUS PROPERTY
> -------- ---- ------ --------------------------------
> USRMQT S N Y
> SYSMQT S N
> 2 record(s) selected.
> PROPERTY VARCHAR(32) Properties for the table. A single
> blank indicates
> that the table has no properties.
> But from the explanation for the PROPERTY, I am not sure if
> I can depend
> on this.
>
> Thanks,
> FRX
>
>[/color]

**Fan Ruo Xin** · Nov 12 '05, 05:40 AM

Re: How to tell if a MQT is maintained by USER or SYSTEM

Thanks for your answer.
I did some tests today. I can't depend on the CONST_CHECKED (Byte 5).
The value of this byte for a MQT which REFRESH IMMEIDATE can also be set
as 'U' (U = Checked by user).
Regards,
FRX

"Bob [IBM]" wrote:
[color=blue]
> I am curious, what does the CONST_CHECKED column in SYSCAT.TABLES tell
> you? Is it different or does it say anything? CONST_CHECKED CHAR(32)
> Byte 1 represents foreign key constraints.
>
> Byte 5 represents materialized query table.
>
> Encodes constraint information on checking. Values:
>
> Y = Checked by system
>
> U = Checked by user
>
> F = In byte 5, the materialized query table cannot be refreshed
> incrementally.
>
> --
>
> Bob
> Consulting I/T Specialist
> IBM Toronto Lab
> IBM Software Services for Data Management
> [My comments are solely my own and are not meant to represent an
> official IBM position - ask my cat!]
>
> "Fan Ruo Xin" <fanruox@sbcglo bal.net> wrote in message
> news:3F972C60.A 39323AB@sbcglob al.net...
>
>
> Please don't tell me using DB2LOOK.
> I only found the following difference when I checked the
> SYSCAT.TABLES.
> tabname TYPE STATUS PROPERTY
> -------- ---- ------ --------------------------------
> USRMQT S N Y
> SYSMQT S N
> 2 record(s) selected.
> PROPERTY VARCHAR(32) Properties for the table. A single
> blank indicates
> that the table has no properties.
> But from the explanation for the PROPERTY, I am not sure if
> I can depend
> on this.
>
> Thanks,
> FRX
>
>[/color]

**Bob [IBM]** · Nov 12 '05, 05:40 AM

Re: How to tell if a MQT is maintained by USER or SYSTEM

Oh well - worth a try I guess :)

--

Bob
Consulting I/T Specialist
IBM Toronto Lab
IBM Software Services for Data Management
[My comments are solely my own and are not meant to represent an official IBM position - ask my cat!]
"Fan Ruo Xin" <fanruox@sbcglo bal.net> wrote in message news:3F9886D4.2 E2F8ED3@sbcglob al.net...
Thanks for your answer.
I did some tests today. I can't depend on the CONST_CHECKED (Byte 5).
The value of this byte for a MQT which REFRESH IMMEIDATE can also be set
as 'U' (U = Checked by user).
Regards,
FRX

"Bob [IBM]" wrote:
[color=blue]
> I am curious, what does the CONST_CHECKED column in SYSCAT.TABLES tell
> you? Is it different or does it say anything? CONST_CHECKED CHAR(32)
> Byte 1 represents foreign key constraints.
>
> Byte 5 represents materialized query table.
>
> Encodes constraint information on checking. Values:
>
> Y = Checked by system
>
> U = Checked by user
>
> F = In byte 5, the materialized query table cannot be refreshed
> incrementally.
>
> --
>
> Bob
> Consulting I/T Specialist
> IBM Toronto Lab
> IBM Software Services for Data Management
> [My comments are solely my own and are not meant to represent an
> official IBM position - ask my cat!]
>
> "Fan Ruo Xin" <fanruox@sbcglo bal.net> wrote in message
> news:3F972C60.A 39323AB@sbcglob al.net...
>
>
> Please don't tell me using DB2LOOK.
> I only found the following difference when I checked the
> SYSCAT.TABLES.
> tabname TYPE STATUS PROPERTY
> -------- ---- ------ --------------------------------
> USRMQT S N Y
> SYSMQT S N
> 2 record(s) selected.
> PROPERTY VARCHAR(32) Properties for the table. A single
> blank indicates
> that the table has no properties.
> But from the explanation for the PROPERTY, I am not sure if
> I can depend
> on this.
>
> Thanks,
> FRX
>
>[/color]

**temporary_10@hotmail.com** · Nov 12 '05, 05:40 AM

Re: How to tell if a MQT is maintained by USER or SYSTEM

Yes, Byte 1 of the property column will indicate what you want.

Fan Ruo Xin wrote:
[color=blue]
> Please don't tell me using DB2LOOK.
> I only found the following difference when I checked the SYSCAT.TABLES.
> tabname TYPE STATUS PROPERTY
> -------- ---- ------ --------------------------------
> USRMQT S N Y
> SYSMQT S N
> 2 record(s) selected.
> PROPERTY VARCHAR(32) Properties for the table. A single blank indicates
> that the table has no properties.
> But from the explanation for the PROPERTY, I am not sure if I can depend
> on this.
>
> Thanks,
> FRX[/color]

**Fan Ruo Xin** · Nov 12 '05, 05:41 AM

Re: How to tell if a MQT is maintained by USER or SYSTEM

Thank you.
Regards,
FRX

temporary_10@ho tmail.com wrote:
[color=blue]
> Yes, Byte 1 of the property column will indicate what you want.
>
> Fan Ruo Xin wrote:
>[color=green]
> > Please don't tell me using DB2LOOK.
> > I only found the following difference when I checked the SYSCAT.TABLES.
> > tabname TYPE STATUS PROPERTY
> > -------- ---- ------ --------------------------------
> > USRMQT S N Y
> > SYSMQT S N
> > 2 record(s) selected.
> > PROPERTY VARCHAR(32) Properties for the table. A single blank indicates
> > that the table has no properties.
> > But from the explanation for the PROPERTY, I am not sure if I can depend
> > on this.
> >
> > Thanks,
> > FRX[/color][/color]

How to tell if a MQT is maintained by USER or SYSTEM

How to tell if a MQT is maintained by USER or SYSTEM

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