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Focal Point    Focal Point Forums  Hop To Forum Categories  WebFOCUS/FOCUS Forum on Focal Point     SQL BETWEEN equalivent

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Mahonex
Member
posted
I've run into a snag with an index on DB2 within a large transaction table. The DBA has utilized the FIELDNAME (a date field) as an index.
If I simply use a
WHERE FIELDNAME GT '2004-01-19' AND
FIELDNAME LT '2004-12-31'

DB2 appears to ignore the index and scan the table. If within direct SQL I utilize a BETWEEN command on those dates DB2 will utilize the index (and speed things up).

Any suggestions of a FOCUS equalivent of a between short of direct SQL? (DB2/MVS) Focus 7.2
 
Posts: 6 | Location: Grand Rapids, MI | Registered: April 25, 2003Report This Post
<Grzegorz>
posted
The syntax equivalent of SQL BETWEEN is (informally):
TABLE FILE ...<br />...<br />WHERE <field> FROM <value1> TO <value2><br />...<br />END
but I did not checked yet, how is it translated to SQL for the relational adapter.

Regards
Grzegorz
 
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Mahonex
Member
posted Hide Post
Many thanks!
That appears to be taking advantage of the index.
 
Posts: 6 | Location: Grand Rapids, MI | Registered: April 25, 2003Report This Post
<pranas>
posted
How about using SQL Passthru?

SET SQLENG=<engine>
SQL
<native_sql>
END

It helps writing eficient code (specialy when timestamp fields used :-)

Pranas
 
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