dblayeroo : Manage the GROUP_CONCAT in PgSQL without error of casting

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@4289 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

dblayeroo.php

@@ -1621,6 +1621,17 @@ class dblayeroo
       if (! isset ($func))
         $this->displayColumn[$getSortOrder] =
           $distinct.$this->sep.$fieldName.$this->sep;
+      elseif ($func === "string_agg")
+      {
+        // For Postgres, the entry must be :
+        // string_agg(distinct "group"::character varying, ',' order by "group")
+        if ($separator == "")
+          $separator = ", ','";
+        $this->displayColumn[$getSortOrder] =
+          "$func($distinct$this->sep$fieldName$this->sep".
+          "::character varying$separator ".
+          "order by $this->sep$fieldName$this->sep)";
+      }
       else
         $this->displayColumn[$getSortOrder] =
           "$func($distinct$this->sep$fieldName$this->sep$separator)";