MySQL Specific Queries in Event Module

* warning: pg_query() [function.pg-query]: Query failed: ERROR: function from_unixtime(integer) does not exist HINT: No function matches the given name and argument types. You may need to add explicit type casts. in /usr/share/drupal5/includes/database.pgsql.inc on line 125.
* user warning: query: SELECT count(DISTINCT(YEAR(from_UNIXTIME(event.event_start)))) FROM node node LEFT JOIN event event ON node.nid = event.nid WHERE (node.status = '1') AND (node.type IN ('event')) in /usr/share/drupal5/includes/database.pgsql.inc on line 144.
* warning: pg_query() [function.pg-query]: Query failed: ERROR: function from_unixtime(integer) does not exist HINT: No function matches the given name and argument types. You may need to add explicit type casts. in /usr/share/drupal5/includes/database.pgsql.inc on line 125.
* user warning: query: SELECT YEAR(from_UNIXTIME(event.event_start)) AS event_year, count(node.nid) AS num_nodes, node.title AS node_title, node.changed AS node_changed, event.event_start AS event_event_start, event.event_end AS event_event_end, event.timezone AS event_timezone FROM node node LEFT JOIN event event ON node.nid = event.nid WHERE (node.status = '1') AND (node.type IN ('event')) GROUP BY YEAR(from_UNIXTIME(event.event_start)) LIMIT 10 OFFSET 0 in /usr/share/drupal5/includes/database.pgsql.inc on line 144.