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To add to Elvis' & Sudha's responses, there is something somewhere in the docs that says that the order of records returned is not guaranteed unless you use and ORDER BY clause. This is especially important with parallel access methods. Normally, with no parallel processing, the order is that of the physical file. Grouping imposes an order.

And also, it does not help to specify a logical file instead of the physical file - it ends up taking more time, as the system tries to find the physical over which the logical is built, IIRC. This is so the optimizer can check other access paths, in order to find the one that works best. The optimizer does not assume that you are helping it. The exception to this might be if you use a select/omit logical, which, of course, are not part of the SQL standard but can be useful on the iSeries.

So don't try to be too helpful to the optimizer where indexes are concerned - it will generally ignore you. The things you can do to help it include providing transitive join specifications, e.g., so it will look for the right indexes.

HTH
Vern

At 09:58 AM 3/20/2005, you wrote:

When I do an interactive SQL session (STRSQL) on a keyed logical file, and
SELECT *, the list of records returned is not in keyed order.  I do not use
an ORDER BY, because I was thinking that the use of the logical file
provides the "keyed" view of the physical file it is based on.  Is there
some other keyword required with the SELECT statement which forces the key
sequence of the logical file to be used when listing the records?  Or must
the ORDER BY be used even for a keyed logical file?


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