Don't increment 'Empty_queries' for queries with errors.

mysql-test/r/empty_table.result

@@ -7,4 +7,12 @@ select * from t1;
 nr	b	str
 select * from t1 limit 0;
 nr	b	str
+show status like "Empty_queries";
+Variable_name	Value
+Empty_queries	2
 drop table t1;
+select * from t2;
+ERROR 42S02: Table 'test.t2' doesn't exist
+show status like "Empty_queries";
+Variable_name	Value
+Empty_queries	2

mysql-test/t/empty_table.test

@@ -10,6 +10,15 @@ create table t1 (nr int(5) not null auto_increment,b blob,str char(10), primary
 select count(*) from t1;
 select * from t1;
 select * from t1 limit 0;
+show status like "Empty_queries";
 drop table t1;
 
+#
+# Accessing a non existing table should not increase Empty_queries
+#
+
+--error 1146
+select * from t2;
+show status like "Empty_queries";
+
 # End of 4.1 tests

sql/sql_parse.cc

@@ -6359,7 +6359,7 @@ static bool execute_sqlcom_select(THD *thd, TABLE_LIST *all_tables)
     }
   }
   /* Count number of empty select queries */
-  if (!thd->get_sent_row_count())
+  if (!thd->get_sent_row_count() && !res)
     status_var_increment(thd->status_var.empty_queries);
   else
     status_var_add(thd->status_var.rows_sent, thd->get_sent_row_count());