Re: How to speed up product code and subcode match

Hi!

> Separate
> the product code and size into two columns --- if there's somebody
> who really wants to see them in the above format, give them a
> view or generated column. Then instead of the impossible-to-optimize
> queries you showed, you could do something like
>
> select toode.toode , n2, n3, n4
> from toode, vordlusajuhinnak
> where toode.toode = vordlusajuhinnak.toode;
>
Can function index

create index on toode ( *split_part( toode, '/',1) *)

and query

select toode.toode , n2, n3, n4

from toode, vordlusajuhinnak

where *split_part( toode.toode, '/',1) *= vordlusajuhinnak.toode;

used and keeping existing table structure? Functional index should
produce same speed improvement as using separate column?

Andrus.