A fix for Bug#6761 "mysql_list_fields() does not work": test

case will be added to client_test in 4.1


sql/sql_parse.cc:
  A fix for bug #6761: "mysql_list_fields() does not work": init
  thd->query_length, which is used next line. Remove a stale comment.

sql/sql_parse.cc

@@ -1104,7 +1104,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     thd->free_list=0;
     table_list.alias= table_list.real_name= thd->strdup(packet);
     packet=strend(packet)+1;
-    // command not cachable => no gap for data base name
+    thd->query_length= strlen(packet);       // for simplicity: don't optimize
     if (!(thd->query=fields=thd->memdup(packet,thd->query_length+1)))
       break;
     mysql_log.write(thd,command,"%s %s",table_list.real_name,fields);