Re: Speeding up loops in pl/pgsql function

Dkloskxe

Steve Crawford <scrawford@pinpointresearch.com> wrote:

>On 05/25/2011 11:45 AM, Reuven M. Lerner wrote:
>> Hi, Alex.  You wrote:
>>> Have you tried something like:
>>> SELECT  encode(regexp_replace('141142143', '(\d{3})', '\\\1',
>>> 'g')::bytea, 'escape');
>> Hmm, forgot about regexp_replace.  It might do the trick, but without
>> a full-blown eval that I can run on the replacement side, it'll be a
>> bit more challenging.  But that's a good direction to consider, for sure.
>
>The function given didn't work exactly as written for me but it is on
>the right track. See if this works for you (input validation is left as
>an exercise for the reader...:)):
>
>create or replace function octal_string_to_text(someoctal text) returns
>text as $$
>declare
>     binstring text;
>begin
>     execute 'select E''' || regexp_replace($1, E'(\\d{3})', E'\\\\\\1',
>'g') || '''' into binstring;
>return binstring;
>end
>$$ language plpgsql;
>
>Cheers,
>Steve
>
>
>--
>Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
>To make changes to your subscription:
>http://www.postgresql.org/mailpref/pgsql-performance