Index: lib/ezdb/classes/ezmysqlidb.php
===================================================================
--- lib/ezdb/classes/ezmysqlidb.php	(revision 22561)
+++ lib/ezdb/classes/ezmysqlidb.php	(working copy)
@@ -449,7 +449,7 @@
             }
             else
             {
-                eZDebug::writeError( "Query error: " . mysqli_error( $connection ) . ". Query: ". $sql, "eZMySQLiDB"  );
+                eZDebug::writeError( "Query error (" . mysqli_errno( $connection )  . "): " . mysqli_error( $connection ) . ". Query: ". $sql, "eZMySQLiDB"  );
                 $oldRecordError = $this->RecordError;
                 // Turn off error handling while we unlock
                 $this->RecordError = false;