Re: Funtion to clean up strings?

On Friday 13 Feb 2009, Andreas wrote:
> now ... lets get more complicated.
> Phone numbers are entered:
> 0123/4567-89 national number
> 0049/123/4567-89 the same number
> +49/123/4567-89 still the same number
>
> should come out as 0123456789 to search in this column.
> "0049" and "+49" --> 0
>
> while international numbers
> +33/123456789
> 0033/123456789
>
> should come as
> +33123456789

TEST=> create table foo(p text);

TEST=> insert into foo (select regexp_split_to_table('0123/4567-89
0049/123/4567-89 +49/123/4567-89 +33/123456789 0033/123456789',' '));

TEST=> select * from foo;
p
------------------
0123/4567-89
0049/123/4567-89
+49/123/4567-89
+33/123456789
0033/123456789
(5 rows)

TEST=> select
(case
when p ~ E'^(\\+|00)49'
then '0'||regexp_replace(regexp_replace(p, E'[^0-9+]', '', 'g'),
E'^(?:\\+|00)49(.*)', E'\\1')
when p ~ E'^(\\+|00)'
then '+'||regexp_replace(regexp_replace(p, E'[^0-9+]', '', 'g'),
E'^(?:\\+||00)(.*)', E'\\1')
else
regexp_replace(p, E'[^0-9]', '', 'g')
end)
from foo;
regexp_replace
----------------
0123456789
0123456789
0123456789
+33123456789
+33123456789
(5 rows)

That do what you want? (Apologies for the wrapped lines.)

Regards,

-- Raju
--
Raj Mathur raju(at)kandalaya(dot)org http://kandalaya.org/
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