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Message Posted: Tue, 23 Nov 2004 @ 09:00:15 GMT


     
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Subj:   Re: Quesion on Explain plan on "Create a new table"
 
From:   Dieter Noeth

akleema_talukder wrote:

  When I do a explain on a " create table " I see in the explain plan two steps which I do not understand reason behind it. I highlighted these two steps below. We know that we see "AMP ABORT test " which caused by an ABORT or ROLLBACK statement . My question is: Why do we see these steps in the Create table statements?"  


  I will appreciate if anybody gives me any hints for the reason behind it.  


I don't know exactly, too.

But i always tell my students, it's probably a check if the tablename is still valid, because that create table might have been blocked and queued by a Drop Database or another Create Table.

     1) We do a single-AMP ABORT test from DBC.DBase by way of the
        unique primary index.

-> does the table's database still exist?

     2) We do a single-AMP ABORT test from DBC.TVM by way of the
        unique primary index.

-> is there no other object with that name within that database?


Dieter



     
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