The best way is to use Ops Navigator to run Visual Explain on the SQL
Statement and see what it recommends. You can also turn on debug and get
more detailed messages in the job log. Visual Explain is the best. You
might also check the Index Adviser in Ops Nav to see if it is building any
indexes when you run the SQL statement.
On Mon, Jan 21, 2013 at 11:14 AM, James H. H. Lampert <
jamesl@xxxxxxxxxxxxxxxxx> wrote:
Suppose we have a header record, with a "closed date" field, and a
detail record with a "vendor" field.
Both files are DDS-created PFs, and the detail file has a LF indexed on
its "parent" field, so it's easy enough to go back and forth between
parent and child.
Now suppose we are doing an SQL SELECT on a join of the header and the
detail, with a WHERE clause involving both fields.
Is there a way to set up an index, whether from SQL or via a new DDS LF,
that would speed up this SELECT?
--
JHHL
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