schemas/_regproc.postgres.sql
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Tue, 01 Jul 2014 17:44:06 +0200
changeset 9841 d2e196f12db4
parent 9419 3e6a1791339d
child 10327 a504a7840915
permissions -rw-r--r--
[webtests/urlrewrite] do not store a plain entity on the test, only an eid

/* -*- sql -*-

   postgres specific registered procedures,
   require the plpgsql language installed

*/

DROP FUNCTION IF EXISTS comma_join (anyarray) CASCADE;
CREATE FUNCTION comma_join (anyarray) RETURNS text AS $$
    SELECT array_to_string($1, ', ')
$$ LANGUAGE SQL;;


CREATE FUNCTION cw_array_append_unique (anyarray, anyelement) RETURNS anyarray AS $$
    SELECT array_append($1, (SELECT $2 WHERE $2 <> ALL($1)))
$$ LANGUAGE SQL;;

DROP AGGREGATE IF EXISTS group_concat (anyelement) CASCADE;
CREATE AGGREGATE group_concat (
  basetype = anyelement,
  sfunc = cw_array_append_unique,
  stype = anyarray,
  finalfunc = comma_join,
  initcond = '{}'
);;



DROP FUNCTION IF EXISTS limit_size (fulltext text, format text, maxsize integer);
CREATE FUNCTION limit_size (fulltext text, format text, maxsize integer) RETURNS text AS $$
DECLARE
    plaintext text;
BEGIN
    IF char_length(fulltext) < maxsize THEN
       RETURN fulltext;
    END IF;
    IF format = 'text/html' OR format = 'text/xhtml' OR format = 'text/xml' THEN
       plaintext := regexp_replace(fulltext, '<[\\w/][^>]+>', '', 'g');
    ELSE
       plaintext := fulltext;
    END IF;
    IF char_length(plaintext) < maxsize THEN
       RETURN plaintext;
    ELSE
       RETURN substring(plaintext from 1 for maxsize) || '...';
    END IF;
END
$$ LANGUAGE plpgsql;;

DROP FUNCTION IF EXISTS text_limit_size (fulltext text, maxsize integer);
CREATE FUNCTION text_limit_size (fulltext text, maxsize integer) RETURNS text AS $$
BEGIN
    RETURN limit_size(fulltext, 'text/plain', maxsize);
END
$$ LANGUAGE plpgsql;;