(SCRUM) (part of WL#818)


mysql-test/r/subselect.result:
  test of new engine
mysql-test/t/subselect.test:
  test of new engine
sql/item_subselect.cc:
  new engine added
  some common operation moved in separate method
sql/item_subselect.h:
  new engine added
  some common operation moved in separate method
sql/sql_select.cc:
  new engine added
  some common operation moved in separate method
sql/sql_select.h:
  some common operation moved in separate method

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


mysql-test/r/subselect.result:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged

sql/sql_select.cc:
  Auto merged

(SCRUM) (part of WL#818)


mysql-test/r/subselect.result:
  test of new optimisation
mysql-test/t/subselect.test:
  test of new optimisation
sql/item_subselect.cc:
  new engine for simple IN with primary index
sql/item_subselect.h:
  new engine for simple IN with primary index
sql/sql_lex.h:
  fixed typo
sql/sql_select.cc:
  engine changing
  report_error can't be static, because it used in new engine
sql/sql_select.h:
  new JT_ type (just for information in EXPLAIN statement)
  report_error can't be static, because it used in new engine

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

mysql-test/t/subselect.test:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged

(now it return correct results. Test was commited before, but it is not pushed,
BUG# is not registered, because bug was introduced after release)


sql/sql_select.cc:
  fixed subselect with to temporary tables executing
sql/sql_select.h:
  fixed subselect with to temporary tables executing

fixed test func_gconcat to be repeatable independent of presend tables and avoid removing user tables


mysql-test/r/func_gconcat.result:
  removed warning in test
  fixed table tnames (should be tN, where N is number)
mysql-test/t/func_gconcat.test:
  removed warning in test
  fixed table tnames (should be tN, where N is number)
sql/item_sum.cc:
  added debug information
  fixed memory leak in group_concat function

(SCRUM)


sql/sql_select.cc:
  support of fake_select_lex join clean
  removed compiler warning
sql/sql_select.h:
  JOIN clean for fake_select_lex
sql/sql_union.cc:
  avoiding of allocating JOIN structure on every UNION executing

initialization of item_thd moved to constructor (in any case we need thd in constructor)
initialization of group_concat_max_len to constructor to avoid incorrect length reporting (BUG#757)
removed Item_func_group_concat::fix_length_and_dec() because item have its own fix_fields and will not have inherited items


mysql-test/r/func_gconcat.result:
  test for BUG#757
mysql-test/t/func_gconcat.test:
  test for BUG#757
sql/item_sum.cc:
  reduced using of slow current_thd/current_lex macro
  initialization of item_thd moved to constructor (in any case we need thd in constructor)
  initialization of group_concat_max_len to constructor to avoid incorrect length reporting (BUG#757)
sql/item_sum.h:
  removed Item_func_group_concat::fix_length_and_dec() because item have its own fix_fields and will not have inherited items

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


mysql-test/t/subselect.test:
  Auto merged
sql/sql_select.cc:
  Auto merged

into myvenu.com:/home/venu/work/sql/dev-4.1

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1

  Item_func::agg_arg_collations()
  Item_func::arr_arg_collations_for_comparison()
 to aggregate argument collations.
It helps to reuse a lot of code.

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

into mysql.r18.ru:/usr/home/ram/work/4.1

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

mysql-test/t/subselect.test:
  fixed test case for no InnoDB

mysql-test/r/handler.result:
  test case for the bug #787: HANDLER without INDEX doesn't work with deleted rows
mysql-test/t/handler.test:
  test case for the bug #787: HANDLER without INDEX doesn't work with deleted rows
sql/sql_handler.cc:
  fix for the bug #787: HANDLER without INDEX doesn't work with deleted rows

into narttu.mysql.fi:/my/mysql-4.1

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1

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

  ROW('a','b','c) = ROW('A' collate latin1_bin,'b','c') returns 0
When a number is compared to a string, character sets and 
collations are not aggregated. e.g. this returned error in 4.1.0:

SELECT 1=_latin2'1';
because character sets was aggregated, and 1 was considered as
a string of latin1 charset during this aggregation.

into narttu.mysql.fi:/my/mysql-4.1

mysql-test/r/func_gconcat.result:
  Update results
mysql-test/t/func_gconcat.test:
  Make tests repeatable.  The problem is that due to floating point handling / qsort implementation the way rows are read may differ between versions

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


sql/sql_select.cc:
  Auto merged

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

mysql-test/r/subselect.result:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
sql/item.cc:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged

It looks like samll revolution in SELECT_LEX tree, but it was only natural way to solve problem with name resolution of external fields inside subselect which belongs to global order of union
also it have following advantages:
 - removed mess with current_select type conversion
   - type checking/converting
   - a lot of virtual methods
 - fake select for union execution allocated only once (it was allocated for every subselect with union executing)

changes:
fixed bug with outer fields name resolution of subqueries which belong to global ORDER BY clause
remuved select_lex() function, now thd->lex.current_select always have type SELECT_LEX
new SELECT_LEX (fake_select_lex) will be allocated in case of UNION for using in UNION processing
fake_select_lex allocated for union hold global ORDER BY & LIMIT clauses and have linkage equal to GLOBAL_OPTIONS_TYPE 
new description of SELECT_LEX tree

(SCRUM)


sql/item.cc:
  global parameters moved to fake_select_lex
sql/item_subselect.cc:
  global parameters moved to fake_select_lex
sql/item_sum.cc:
  no need type checking & converion now
sql/sql_delete.cc:
  no need type checking & converion now
sql/sql_derived.cc:
  global parameters moved to fake_select_lex
sql/sql_lex.cc:
  not used fields/mrthods moved from st_select_lex_node to st_select_lex
  global parameters moved to fake_select_lex
sql/sql_lex.h:
  comments about new tree of select_lex s
  not used fields/mrthods moved from st_select_lex_node to st_select_lex
  global parameters moved to fake_select_lex
sql/sql_parse.cc:
  global parameters moved to fake_select_lex
  allocation of fake_select_lex on demand
sql/sql_select.cc:
  now fake_select_lex marked as GLOBAL_OPTIONS_TYPE
sql/sql_union.cc:
  global parameters moved to fake_select_lex
sql/sql_yacc.yy:
  global parameters moved to fake_select_lex

fixed dependence of items from reduced subquery
(SCRUM)


sql/item.cc:
  fixed dependence of items from reduced subquery
sql/item.h:
  fixed dependence of items from reduced subquery
  Item tree iterator
sql/item_cmpfunc.cc:
  Item tree iterator
sql/item_cmpfunc.h:
  Item tree iterator
sql/item_func.cc:
  Item tree iterator
sql/item_func.h:
  Item tree iterator
sql/item_row.cc:
  Item tree iterator
sql/item_row.h:
  Item tree iterator
sql/item_strfunc.h:
  Item tree iterator
sql/item_subselect.cc:
  Item tree iterator