Re: View based upon function won't use index on joins

[Jonathan Foy <thefoy@xxxxxxxxx>]

This seems to result in the same problem; should I attempt to pull for a specific id_nbr/id_qfr, postgres uses the index without a problem. If I try to join the two tables/views however, it insists on doing a sequential scan (actually two in this case) and will not use the index.  Any other ideas/explanations?

That being said, I probably need to look into arrays more.  I haven't used them at all in my relatively brief experience with postgres.  More research!

2009/11/20 Віталій Тимчишин <tivv00@xxxxxxxxx>

How about

CREATE OR REPLACE VIEW value_codes_view AS

select * from (

 SELECT value_codes.id_nbr,
      value_codes.id_qfr,

      (ARRAY[val_1_cd_1, ... , val_2_cd_12])[i] as value_code,
      (ARRAY[val_1_amt_1, ... , val_2_amt_12])[i] as value_amount,
   FROM value_codes, generate_series(1,24) i) a
where value_code is not null and value_code != '';
?