EXPLAIN UNION using same routing which used for execution which allow return correct bug messages (Bug #3639)
EXPLAIN of hidden SELECT of UNION

into mysql.com:/dbdata/psergey/mysql-4.1-code-cleanup

into sanja.is.com.ua:/home/bell/mysql/bk/work-ndb-4.1

as the I/O thread filters on the server id, we must test replicate_same_server_id in it (on top of in the SQL thread).

into mysql.com:/home/my/mysql-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/work-ndb-4.1

SQL_SELECT_LIMIT as default will be applied only for SELECT statement if there was not explicit LIMIT clause
correct table list passed to class constructor of select_update

Make Item_param::val_int and Item_param::val_str follow the used convention and return 0 if null_value==1.

into hegel.local:/home/miguel/bk/mysql-4.1

into mysql.com:/home/my/mysql-4.1

We didn't use 'only index' for tables of type 'const'. (Bug #3497)

(Bug #3596)

into hundin.mysql.fi:/home/marko/l/mysql-4.0

into sinisa.nasamreza.org:/mnt/work/mysql-4.1

but used in a nested query.

Now test_bug1664() uses new statement checking macros.

"mysql_send_long_data() API call is completely broken".

Now we are resetting some members (long_data_supplied/null_value...) of Item_param to its 
initial state after each execution of prepared statement. We also manipulating 
Item_param::maybe_null/null_value only via Item_param::set_* setters which makes code a bit 
more robust.

just for beauty of truth.

into mysql.com:/home/mysql_src/mysql-4.0

in hard-coded replication messages, always put small-length info (error codes, explanation of the error) at the beginning,
so that it is not cut by truncation if the query is very long (which happens if the query goes first).

  fixing typo
union.test:
  fixing type

into sanja.is.com.ua:/home/bell/mysql/bk/work-prep-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/work-sub-4.1