- #7295: Fixing issue with latest comments being incorrectly displayed on PostgreSQL

database/database.pgsql

@@ -681,8 +681,11 @@ INSERT INTO blocks(module,delta,status) VALUES('user', '1', '1');
 --- Functions
 ---
 
-CREATE FUNCTION "greatest"(integer, integer) RETURNS integer AS '
+CREATE FUNCTION greatest(integer, integer) RETURNS integer AS '
 BEGIN
+  IF $2 IS NULL THEN
+    RETURN $1;
+  END IF;
   IF $1 > $2 THEN
     RETURN $1;
   END IF;

database/updates.inc

@@ -65,6 +65,7 @@ $sql_updates = array(
   "2004-06-30" => "update_91",
   "2004-07-07" => "update_92",
   "2004-07-11" => "update_93",
+  "2004-07-22" => "update_94"
 );
 
 function update_32() {
@@ -1162,6 +1163,30 @@ function update_93() {
   return $ret;
 }
 
+function update_94() {
+  /**
+  * Postgres only update
+  */
+  $ret = array();
+  if ($GLOBALS['db_type'] == 'pgsql') {
+    $ret[] = update_sql('DROP FUNCTION "greatest"(integer, integer)');
+    $ret[] = update_sql("
+      CREATE FUNCTION greatest(integer, integer) RETURNS integer AS '
+        BEGIN
+          IF $2 IS NULL THEN
+            RETURN $1;
+          END IF;
+          IF $1 > $2 THEN
+            RETURN $1;
+          END IF;
+          RETURN $2;
+        END;
+      ' LANGUAGE 'plpgsql';
+    ");
+  }
+  return $ret;
+}
+
 function update_sql($sql) {
   $edit = $_POST["edit"];
   $result = db_query($sql);