TABLE_STATISTICS increments ROWS_CHANGED twice upon UPDATE and does not count DELETE

@@ -40,14 +47,22 @@ static int table_stats_fill(THD *thd, TABLE_LIST *tables, COND *cond)

         check_grant(thd, SELECT_ACL, &tmp_table, 1, 1, 1))

       continue;

+    rows_changed= (rows_stats->inserted + rows_stats->updated +

+                   rows_stats->updated);

set @userstat.save= @@userstat;

set global userstat= 1;

create table t (a int);

insert into t values (1),(2);

flush table_statistics;

update t set a = a + 10;

select rows_changed from information_schema.table_statistics where table_name = 't';

delete from t where a = 11;

select rows_changed from information_schema.table_statistics where table_name = 't';

# Cleanup

drop table t;

set global userstat= @userstat.save;

flush table_statistics;

update t set a = a + 10;

select rows_changed from information_schema.table_statistics where table_name = 't';

rows_changed

4

delete from t where a = 11;

select rows_changed from information_schema.table_statistics where table_name = 't';

rows_changed

4