Missing SQL functions in PostgreSQL

MySQL functions FROM_UNIXTIME, CURDATE and UNIX_TIMESTAMP are missing in PostgreSQL. Previous versions of the module made use of those functions: if am right, the current version uses only FROM_UNIXTIME. Anyway, for your reference, the SQL code (specific to PostgreSQL) to create and drop the above functions is provided below. If the module will continue to use any of the above functions, the corresponding code should be included in statspro.install.

CREATE OR REPLACE FUNCTION curdate() RETURNS date
AS $$select current_date as result;$$
LANGUAGE sql;

DROP FUNCTION curdate();
  
CREATE OR REPLACE FUNCTION from_unixtime(integer) RETURNS timestamp without time zone
AS $_$
SELECT $1::abstime::timestamp without time zone AS result
$_$
LANGUAGE sql;

DROP FUNCTION from_unixtime(integer);

CREATE OR REPLACE FUNCTION unix_timestamp() RETURNS integer
AS $$
SELECT
ROUND(EXTRACT( EPOCH FROM abstime(now()) ))::int4 AS result;
$$
LANGUAGE sql;

DROP FUNCTION unix_timestamp();

CREATE OR REPLACE FUNCTION unix_timestamp(timestamp with time zone) RETURNS integer
AS $_$
SELECT
ROUND(EXTRACT( EPOCH FROM ABSTIME($1) ))::int4 AS result;
$_$
LANGUAGE sql;

DROP FUNCTION unix_timestamp(timestamp with time zone);