Re: Why the TEMP tablespace is not being used while creating MV

Hi Roger

The temporary tablespace would be used to perform sorts, or aggregations,
should they not fit in memory.

But the temporary segment that will later become the actual materialized
view is created in the tablespace where you're creating the object itself.
It's the same with a "create table as select" for example.

If oracle would first create the whole MVIEW in the temp tablespace, and
then copy it accross -- think about it, that would take a lot longer than
necessary, and waste a lot of resources.

The segment basically is only of "temporary nature" while the creation
process is running -- therefore oracle allocated "temporary extents". These
are then  "converted" to a normal set forming the segment, which makes up
the final object.

Cheers

Stefan

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=========================


On Fri, Jun 26, 2009 at 12:01 AM, Xu, Roger <Roger.Xu@xxxxxxxx> wrote:

>   Oracle 10.2.0.4.0
>
>
>
> I am getting the following while creating MV. Why the TEMP tablespace is
> not being used? Thanks.
>
>
>
>                         *
>
> ERROR at line 58:
>
> ORA-01652: unable to extend temp segment by  in tablespace
>
>
>
>
>
> SQL> show user
>
> USER is "BTPMUSER"
>
> SQL> select TEMPORARY_TABLESPACE   from user_users;
>
>
>
> TEMPORARY_TABLESPACE
>
> ------------------------------
>
> TEMP
>
>
>
> SQL> !tail -5 /u01/app/oracle/admin/BTPMBID/bdump/ alert_BTPMBID.log
>
>   Current log# 2 seq# 402 mem# 0: /u08/mirrlog/BTPMBID/redo/redo_g2_m1.dbf
>
>   Current log# 2 seq# 402 mem# 1: /u07/origlog/BTPMBID/redo/redo_g2_m2.dbf
>
> Thu Jun 25 17:50:15 2009
>
> ORA-1652: unable to extend temp segment by 128 in
> tablespace                 BTPMTBL
>
> ORA-1652: unable to extend temp segment by 128 in
> tablespace                 BTPMTBL
>
>
>
> SQL>
>
>
>
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