Re: DDL Discussion continued

Somehow got a quick hit of my palm on the touchpad on the last message - but my point was made already.

You should read the manual that talks about optimization and access plans and all - it'll tell you why you need indexes for certain kinds of access - the better ones will not even be possible without an index under it. SQL may create its own index at time, if it thinks that will go faster than some other method.

The link to the manual called Database Performance and Query Optimization, at V5R4, is

http://publib.boulder.ibm.com/infocenter/iseries/v5r4/topic/rzajq/rzajq.pdf

There'd be a similar manual at the other release levels.

HTH
Vern

-------------- Original message --------------
From: Doug Palme <DPalme@xxxxxxxxxxx>

We had our meeting this past week on DDL and I would like to get some
feedback from all of you....I know that some of the uses for a view is far
different than an index but if one is depending on the SQL engine to
determine the most efficient access path for the data, why even create
indexes? Is there any real advantage to creating them?
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