Jonathan Echeverría
Lo que tengo en la cabeza

CREATE FUNCTION pg_catalog.text(integer) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int4out($1));';
CREATE CAST (integer AS text) WITH FUNCTION pg_catalog.text(integer) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(smallint) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int2out($1));';
CREATE CAST (smallint AS text) WITH FUNCTION pg_catalog.text(smallint) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(oid) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(oidout($1));';
CREATE CAST (oid AS text) WITH FUNCTION pg_catalog.text(oid) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(date) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(date_out($1));';
CREATE CAST (date AS text) WITH FUNCTION pg_catalog.text(date) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(double precision) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(float8out($1));';
CREATE CAST (double precision AS text) WITH FUNCTION pg_catalog.text(double precision) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(real) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(float4out($1));';
CREATE CAST (real AS text) WITH FUNCTION pg_catalog.text(real) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(time WITH time zone) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(timetz_out($1));';
CREATE CAST (time WITH time zone AS text) WITH FUNCTION pg_catalog.text(time WITH time zone) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(time without time zone) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(time_out($1));';
CREATE CAST (time without time zone AS text) WITH FUNCTION pg_catalog.text(time without time zone) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(timestamp WITH time zone) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(timestamptz_out($1));';
CREATE CAST (timestamp WITH time zone AS text) WITH FUNCTION pg_catalog.text(timestamp WITH time zone) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(interval) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(interval_out($1));';
CREATE CAST (interval AS text) WITH FUNCTION pg_catalog.text(interval) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(bigint) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int8out($1));';
CREATE CAST (bigint AS text) WITH FUNCTION pg_catalog.text(bigint) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(numeric) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(numeric_out($1));';
CREATE CAST (numeric AS text) WITH FUNCTION pg_catalog.text(numeric) AS IMPLICIT;
CREATE FUNCTION pg_catalog.text(timestamp without time zone) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(timestamp_out($1));';
CREATE CAST (timestamp without time zone AS text) WITH FUNCTION pg_catalog.text(timestamp without time zone) AS IMPLICIT;