Found bugs fixed

libmysqld/lib_sql.cc:
  This would be more correct
sql/item.cc:
  This error not to be exposed
sql/item_strfunc.cc:
  We don't want login/password stuff in Embedded Library
sql/sql_select.cc:
  This error not to be exposed
sql/sql_table.cc:
  Usual changes here

libmysqld/lib_sql.cc

@@ -793,6 +793,7 @@ net_field_length(uchar **packet)
   return (ulong) uint4korr(pos+1);
 }
 
+
 bool select_send::send_data(List<Item> &items)
 {
   List_iterator_fast<Item> li(items);
@@ -956,7 +957,7 @@ int embedded_send_row(THD *thd, int n_fields, char *data, int data_len)
   result->prev_ptr= &cur->next;
   to= (char*) (cur->data+n_fields+1);
   cp= (uchar *)data;
-  end_field= cur->data + n_fields + 1;
+  end_field= cur->data + n_fields;
   
   for (cur_field=cur->data; cur_field<end_field; ++cur_field, ++mysql_fields)
   {
@@ -975,6 +976,9 @@ int embedded_send_row(THD *thd, int n_fields, char *data, int data_len)
 	mysql_fields->max_length=len;
     }
   }
+
+  *cur_field= to;
+
   DBUG_RETURN(0);
 }
 

sql/item.cc

@@ -469,6 +469,9 @@ bool Item_field::fix_fields(THD *thd, TABLE_LIST *tables, Item **ref)
 	cause error ER_NON_UNIQ_ERROR in find_field_in_tables.
       */
       SELECT_LEX *last= 0;
+#ifdef EMBEDDED_LIBRARY
+      thd->net.last_errno= 0;
+#endif
       for (SELECT_LEX *sl= thd->lex.select->outer_select();
 	   sl && !tmp;
 	   sl= sl->outer_select())

sql/item_strfunc.cc

@@ -1248,10 +1248,15 @@ String *Item_func_database::val_str(String *str)
 String *Item_func_user::val_str(String *str)
 {
   THD *thd=current_thd;
+#ifdef EMBEDDED_LIBRARY
+  if (str->copy("localuser@localhost", (uint)strlen("localuser@localhost")))
+    return &empty_string;
+#else
   if (str->copy((const char*) thd->user,(uint) strlen(thd->user)) ||
       str->append('@') ||
       str->append(thd->host ? thd->host : thd->ip ? thd->ip : ""))
     return &empty_string;
+#endif
   return str;
 }
 

sql/sql_select.cc

@@ -5249,6 +5249,9 @@ end_update(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)),
   {
     Item *item= *group->item;
     item->save_org_in_field(group->field);
+#ifdef EMBEDDED_LIBRARY
+    join->thd->net.last_errno= 0;
+#endif
     /* Store in the used key if the field was 0 */
     if (item->maybe_null)
       group->buff[-1]=item->null_value ? 1 : 0;

sql/sql_table.cc

@@ -939,8 +939,7 @@ static int send_check_errmsg(THD* thd, TABLE_LIST* table,
   net_store_data(packet, "error");
   net_store_data(packet, errmsg);
   thd->net.last_error[0]=0;
-  if (my_net_write(&thd->net, (char*) thd->packet.ptr(),
-		   packet->length()))
+  if (SEND_ROW(thd, &thd->net, 4, (char*) thd->packet.ptr(), packet->length()))
     return -1;
   return 1;
 }
@@ -1150,6 +1149,9 @@ static int mysql_admin_table(THD* thd, TABLE_LIST* tables,
     }
 
     int result_code = (table->table->file->*operator_func)(thd, check_opt);
+#ifdef EMBEDDED_LIBRARY
+    thd->net.last_errno= 0;  // these errors shouldn't get client
+#endif
     packet->length(0);
     net_store_data(packet, table_name);
     net_store_data(packet, operator_name);