Re: Generating fields in views with search/replace? - Mailing list pgsql-general

Asfand Qazi (Sanger Institute) wrote:
>
> Say I have a table with fields 'template' and 'original_letter', and
> 'new_selected_letter'.  'template' could be 'abcdefg0abcdefg',
> original_letter could be 'A' and new_selected_letter could be 'B'.
>
> I want a view where I see 2 fields: 'original' as 'abcdefgAabcdefg'
> and 'new_selected' as 'abcdefgBabcdefg', where the view has replaced
> the '0' with original_letter or new_selected_letter respectively.

Well, in 8.4.7 you'd use something like:

   create view xyz as
      select regexp_replace(template, '0', original_letter) as original,
             regexp_replace(template, '0', new_selected_letter) as new_selected
         from template_table;

Should be the same in 9.x.

(See docs for more info on the regexp_replace() function)

HTH.

Later,
Bosco.