Merge abotchkov@bk-internal.mysql.com:/home/bk/mysql-4.1

into deer.(none):/home/hf/work/mysql-4.1.2way

libmysqld/lib_sql.cc

@@ -72,6 +72,12 @@ emb_advanced_command(MYSQL *mysql, enum enum_server_command command,
   mysql->field_count= 0;
 
   thd->store_globals();				// Fix if more than one connect
+  /* 
+     We have to call free_old_query before we start to fill mysql->fields 
+     for new query. In the case of embedded server we collect field data
+     during query execution (not during data retrieval as it is in remote
+     client). So we have to call free_old_query here
+  */
   free_old_query(mysql);
   result= dispatch_command(command, thd, (char *) arg, arg_length + 1);
 

libmysqld/libmysqld.c

@@ -311,14 +311,14 @@ mysql_real_connect(MYSQL *mysql,const char *host, const char *user,
 void STDCALL mysql_close(MYSQL *mysql)
 {
   DBUG_ENTER("mysql_close");
-  if (mysql->methods != &embedded_methods)
-  {
-    cli_mysql_close(mysql);
-    DBUG_VOID_RETURN;
-  }
-
   if (mysql)					/* Some simple safety */
   {
+    if (mysql->methods != &embedded_methods)
+    {
+      cli_mysql_close(mysql);
+      DBUG_VOID_RETURN;
+    }
+
     my_free(mysql->options.user,MYF(MY_ALLOW_ZERO_PTR));
     my_free(mysql->options.host,MYF(MY_ALLOW_ZERO_PTR));
     my_free(mysql->options.password,MYF(MY_ALLOW_ZERO_PTR));