2010/11/4 Dean Gibson (DB Administrator) <postgresql@ultimeth.com>:
> I'm sure this has been asked before, but I couldn't find it:
>
> I have a "zzz CHAR (8)" field. It needs to be CHAR because trailing spaces
> need to be ignored for most operations. However, I need to concatenate it
> with another (literal) string and need the spaces to be significant in that
> operation. The ONLY WAY I could find to do it in v9.0.1 was (represented
> in the following function):
>
> CREATE OR REPLACE FUNCTION padded( field CHAR ) RETURNS TEXT
> RETURNS NULL ON NULL INPUT
> IMMUTABLE
> LANGUAGE SQL AS $SQL$
> SELECT RPAD( $1, OCTET_LENGTH( $1 ) )
> $SQL$;
>
> And then of course I write:
>
> SELECT padded( zzz ) || '/' || ...
>
> Is there a better way?
>
>
nic=# SELECT 'AAAA '::char(6) || 'bbbb';?column?
----------AAAAbbbb
(1 row)
Time: 2.710 ms
nic=# SELECT 'AAAA '::char(6)::cstring || 'bbbb'; ?column?
------------AAAA bbbb
(1 row)
regards
Pavel Stehule
