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new EXPLAIN parameter to show real query as it was interpreted
(SCRUM) (WL#1274)

Remove wait_if_global_read_lock on commit as this can cause deadlocks

More tests cases
After merge fixes

  Multiple tablespaces for InnoDB
sql_table.cc:
  Tell explicitly that InnoDB should retrieve all columns in CHECKSUM TABLE
sql_update.cc, sql_select.cc, my_base.h:
  More descriptive flag name HA_EXTRA_RETRIEVE_ALL_COLS

embedded library
hash_insert renamed to my_hash_insert to avoid name intersection
with another libraries
is there better idea?

optimiser bug patch.

into account to increase the cost of FULL SCAN

to estimate correctly cost of full table scan we should take into
account rows read and skipped on each iteration.

Remove sel000xxxx tests
After merge fixes

Note that mix_innodb_myisam_binlog and union fails after this patch (Will be fixed shortly by maintaners of this code)

fixed IN optimisation bug

Another fix applied

tmp_table_field() renamed to get_tmp_table_field() to avoid redifinition of tmp_table_field(TABLE *t_arg)

aggregate function reinitialization (if no rows was found) made with help of clear()
(fixed BUG#860)

  same as above
sql_lex.h:
  same as above 
sql_union.cc:
  same as aobve
sql_select.cc:
  Fixing that SQL_CALC_FOUND_ROWS work properly in UNION's in 4.1
  Plus updating some fields in THD in the proper places 
  plus fixing a wrong result

Set min value of max_allowed_packet to 1024
Fixed problem with UNION's without braces and SQL_CALC_FOUND_ROWS, LIMIT #,#
and ORDER BY...LIMIT

Fix packet error when using wrong GRANT command

Fix possible replication bug with LOAD DATA ... IGNORE LINES #

fixed number of rows of external field reported to optimizer
added check of choosen key (checked left expression tag)
(SCRUM fix for simple IN optimisation)

   my_checksum() mysys function
   NISAM checksum code moved from mysys to isam/ - it's obsolete
   MyISAM checksum code moved to mysys
   table's checksum accessible from sql layer
   SHOW TABLE STATUS shows checksum (WL#646)
code cleanup

count HAVING clause elements with select list elements, because agregate function can be present in it (BUG#922)
removerd unused loop_id

bug#926