Re: INSERT versus CTAS

Right, tables have no indexes - they are created later.

Btw, is APPEND and PARALLEL hints for DML on tables with indexes working at all?

On Sat, 11 Dec 2004 23:35:42 +0100, jaromir nemec <jaromir_at_db-nemec.com> wrote:
> > I assume that CTAS would be more performant for IOT
>
>
> Right, on the other side for (heap) tables or partitioned tables there is a
> great difference in performance between CTAS over INSERT APPEND but only in
> case when the target table has indexes (but INSERT APPEND to a table with
> indexes is better than INSERT without APPEND)
>
> From your description I assume that your target tables have no indexes. In
> this case I didn't observed significant difference in behavior between CTAS
> (nologging parallel) and INSERT APPEND (with parallel dml enabled) on tables
> and range partitioned tables.
>
> HTH
>
> Jaromir D.B. Nemec

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