diff --git a/cod_session/cod_session.module b/cod_session/cod_session.module
index 92c0c16..f502fd8 100644
--- a/cod_session/cod_session.module
+++ b/cod_session/cod_session.module
@@ -860,11 +860,23 @@ function cod_session_days() {
   static $days;
   if (empty($days)) {
     $days = array();
-    $sql = "SELECT DATE_FORMAT(s.field_slot_datetime_value, '%s') AS day FROM {content_type_time_slot} s
-    INNER JOIN {node} n ON s.nid = n.nid AND s.vid = n.vid
-    GROUP BY DATE_FORMAT(s.field_slot_datetime_value, '%s')
-    ORDER BY s.field_slot_datetime_value ASC";
-    $result = db_query(db_rewrite_sql($sql), '%Y-%m-%d', '%Y-%m-%d');
+    
+    $db_type = $GLOBALS['db_type'];
+    switch ($db_type) {
+      case 'mysql':
+      case 'mysqli':
+        $sql = "SELECT DATE_FORMAT(s.field_slot_datetime_value, '%s') AS day FROM {content_type_time_slot} s
+        INNER JOIN {node} n ON s.nid = n.nid AND s.vid = n.vid
+        GROUP BY DATE_FORMAT(s.field_slot_datetime_value, '%s')
+        ORDER BY s.field_slot_datetime_value ASC";
+        $result = db_query(db_rewrite_sql($sql), '%Y-%m-%d', '%Y-%m-%d');
+      case 'pgsql':
+        $sql = "SELECT TO_CHAR(s.field_slot_datetime_value, '%s') AS day FROM {content_type_time_slot} s
+        INNER JOIN {node} n ON s.nid = n.nid AND s.vid = n.vid
+        GROUP BY TO_CHAR(s.field_slot_datetime_value, '%s')
+        ORDER BY day ASC";
+        $result = db_query(db_rewrite_sql($sql), 'YYYY-MM-DD', 'YYYY-MM-DD');
+    }
     while ($record = db_fetch_array($result)) {
       $date = date_make_date($record['day'], NULL, DATE_DATETIME, array('year', 'month', 'day'));
       $days[$record['day']] = date_format_date($date, 'custom', 'l F, d Y');