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IDS Forum

Re: Query Regarding Temp Dbspace

Posted By: VIKAS HIVARKAR
Date: Friday, 8 August 2008, at 11:46 a.m.

In Response To: Re: Query Regarding Temp Dbspace (Art Kagel)

Dear Mr Kagel !

IDS 11.10 FC2W4 on solaris 10

you were correct, too much of reading into what i read confused me.

I have two temp dbspace entries againts DBSPACETEMP.

Pls let me know, would it be a better idea (for some scenario)to have one non temp dbspace entry againsts DBSPACETEMP ( i know it depends on ones requirments and the code written ) but your word of advice will be helpful.

I guess you were mentioning about the onconfig parameter TEMPTAB_NOLOG
setting this to 1 will disable logging on temp tables and then all the temp tables would be created only in temp dbspace with -t option.

Thanks & Regards
vikas.

>Vikas,

>You are reading too much into what you have read. The post is simply
>telling you that you cannot create a logged table in a temp dbspace and that
>the engine will ONLY create unlogged temp tables in temp dbspaces and logged
>temp tables ONLY in logged//non-temp dbspaces. So, if you do:

>select *
>from sometable
>into temp freddy;

>Since the temp table freddy is a logged table BY DEFAULT unless you are
>running IDS 10.00 or later and have set the ONCONFIG parameter that changes
>that default. It will NOT be created in your temp dbspaces no matter how
>many of them you list in DBSPACETEMP. If you also have non-temp dbspaces
>listed in DBSPACETEMP then freddy will be created in one or more of those
>non-temp dbspaces or if you have ONLY listed temp dbspaces in DBSPACETEMP
>then freddy will be created in ROOTDB.

>On the other hand, if you do:

>select *
>from sometable
>into temp wilma with no log;

>Temp table wilma should be created in a temp dbspace, so it will by default
>be created in one or more of the temp dbspaces listed in DBSPACETEMP but not
>in any non-temp dbspaces listed there. If DBSPACETEMP is empty or all of
>the listed dbspaces are non-temp it will be created in a normal dbspace or
>in ROOTDB.

>That's all. There's a full discussion of the priority of temp table
>creation in the Performance Guide of the FM set.

>In answer to your direct question, if you want the engine to use your temp
>dbspaces for temp tables in a logged database, you must include WITH NO LOG
>in the CREATE TEMP TABLE statement or the INTO TEMP clause (or if you are
>using a recent release - always a good idea to post your version and
>platform info - set the ONCONFIG parameter that changes the default logging
>status of temp tables in the instance).

>Art

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