Re: URL Decode function

På tirsdag 06. april 2021 kl. 14:56:10, skrev MichaelDBA <
MichaelDBA(at)sqlexec(dot)com <mailto:MichaelDBA(at)sqlexec(dot)com>>: Hi,

You can create your own "decode" function in pg like this example using
varchars as input. Then simply create other overloaded "decode" functions for
different input datatypes.
CREATE OR REPLACE FUNCTION decode(expr varchar, search varchar, result
varchar, dflt varchar) RETURNS varchar AS $$ BEGIN CASE WHEN expr = search THEN
RETURN result; ELSE RETURN dflt; END CASE; END $$ LANGUAGE plpgsql;

Am I the only one who cannot find anything related to the OP's question in
this answer?

I found this on SO:

CREATE OR REPLACE FUNCTION decode_url_part(p varchar) RETURNS varchar AS $$
SELECT convert_from(CAST(E'\\x' || string_agg(CASE WHEN length(r.m[1]) = 1 THEN
encode(convert_to(r.m[1], 'SQL_ASCII'), 'hex') ELSE substring(r.m[1] from 2 for
2) END, '') AS bytea), 'UTF8') FROM regexp_matches($1, '%[0-9a-f][0-9a-f]|.',
'gi') AS r(m); $$ LANGUAGE SQL IMMUTABLE STRICT;

andreak(at)[local]:5432 13.2 test=# select
decode_url_part('https%3A%2F%2Fwww.cosmohits.com%2FListasPopularidad%2FListaPopularidad%2F1-la-superlista');

┌──────────────────────────────────────────────────────────────────────────────┐
│ decode_url_part │

├──────────────────────────────────────────────────────────────────────────────┤
│
https://www.cosmohits.com/ListasPopularidad/ListaPopularidad/1-la-superlista │

└──────────────────────────────────────────────────────────────────────────────┘
(1 row)

--
Andreas Joseph Krogh