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Message Posted: Thu, 22 Jan 2004 @ 09:50:08 GMT


     
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Subj:   Re: Misunderstanding of join index
 
From:   Victor Sokovin

Just wanted to add how the join index might be redefined:

CREATE JOIN INDEX DB.T1_JI AS
SELECT
PA_DAT
, FIELD_1
, FIELD_2,
, SUM(COST) (NAMED AGR_DATE_COST)
FROM DB.T1
GROUP BY 1,2,3
PRIMARY INDEX (FIELD_2);

PI might need a change, perhaps into PRIMARY INDEX (PA_DAT, FIELD_2).

If you actually require lower granularity you might probably rewrite it like this:

CREATE JOIN INDEX DB.T1_JI AS
SELECT
EXTRACT (YEAR FROM PA_DAT)
, FIELD_1
, FIELD_2,
, SUM(COST) (NAMED AGR_YEAR_COST)
FROM DB.T1
GROUP BY 1,2,3
PRIMARY INDEX (FIELD_2);

Hope it works for you and would appreciate your feedback.

Victor



     
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