Problem is not about intervals and doesn't actually cause 'full table scan'.
We have an optimization for DISTINCT when we have
'DISTINCT field_from_first_join_table' we don't need to read all the
rows from the JOIN-ed table if we found one conforming row.
It stopped working in 5.0 as we return NESTED_LOOP_OK if we came upon
that case in the evaluate_join_record() and that doesn't break the
recordreading loop in sub_select().

Fixed by returning NESTED_LOOP_NO_MORE_ROWS in this case.


mysql-test/r/select.result:
  Bug #32942 now() - interval '7200' second is NOT pre-calculated, causing "full table scan".
  
  test result
mysql-test/t/select.test:
  Bug #32942 now() - interval '7200' second is NOT pre-calculated, causing "full table scan"
  
  test case
sql/sql_select.cc:
  Bug #32942 now() - interval '7200' second NOT pre-calculated, causing "full table scan"
  
  return NESTED_LOOP_NO_MORE_ROWS when we don't need to read rows from
  this table anymore

into  mysql.com:/home/gluh/MySQL/Merge/5.0-opt


include/mysql_com.h:
  Auto merged
myisam/mi_check.c:
  Auto merged

into  mysql.com:/home/gluh/MySQL/Merge/5.0-opt


client/mysql.cc:
  Auto merged
client/mysqltest.c:
  Auto merged
include/mysql_com.h:
  Auto merged
libmysql/CMakeLists.txt:
  Auto merged
myisam/mi_check.c:
  Auto merged
mysql-test/r/delayed.result:
  Auto merged
mysql-test/r/innodb.result:
  Auto merged
mysql-test/r/myisam.result:
  Auto merged
mysql-test/r/ps.result:
  Auto merged
mysql-test/t/merge.test:
  Auto merged
mysql-test/t/myisam.test:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
mysql-test/t/type_datetime.test:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
sql/field.cc:
  Auto merged
sql/ha_myisam.cc:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/set_var.h:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
mysql-test/r/func_misc.result:
  manual merge
mysql-test/r/innodb_mysql.result:
  manual merge
mysql-test/t/func_misc.test:
  manual merge
mysql-test/t/innodb_mysql.test:
  manual merge
sql/sql_insert.cc:
  manual merge

into  mysql.com:/home/psergey/mysql-5.0-bug32198

- Make conditions like "date_col $CMP$ 'datetime-const'" range-sargable


mysql-test/r/range.result:
  BUG#32198: Comparison of DATE with DATETIME still not using indexes correctly
  - Testcase
mysql-test/t/range.test:
  BUG#32198: Comparison of DATE with DATETIME still not using indexes correctly
  - Testcase
sql/field.cc:
  BUG#32198: Comparison of DATE with DATETIME still not using indexes correctly
  - Added comments

into  mysql.com:/home/gluh/MySQL/Merge/4.1-opt


include/mysql_com.h:
  Auto merged
myisam/mi_check.c:
  Auto merged

Fixed case of comment.


mysql-test/t/merge.test:
  Fixed case of comment.

into  stella.local:/home2/mydev/mysql-5.0-axmrg

into  stella.local:/home2/mydev/mysql-5.0-axmrg


mysql-test/r/func_misc.result:
  Manual merge
mysql-test/t/func_misc.test:
  Manual merge

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build


configure.in:
  Auto merged
scripts/mysql_install_db.sh:
  Auto merged

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build

into  pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-4.1-build

with a fix for bug 32694. 

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug27545

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug32815

  
The problem was that when convert_constant_item is called for subqueries,
this happens when we already started executing the top-level query, and
the field argument of convert_constant_item pointed to a valid table row.
In turn convert_constant_item used the field buffer to compute the value
of its item argument. This copied the item's value into the field,
and made equalities with outer references always true.
  
The fix saves/restores the original field's value when it belongs to an
outer table.


mysql-test/r/type_datetime.result:
  Test for BUG#32694.
mysql-test/t/type_datetime.test:
  Test for BUG#32694.
sql/item_cmpfunc.cc:
  - Changed convert_constant_item() so that it doesn't destroy the contents
    of its field argument when the field originates from table in an outer
    query.

Both arguments of the function NAME_CONST must be constant expressions.
This constraint is checked in the Item_name_const::fix_fields method. 
Yet if the argument of the function was not a constant expression no
error message was reported. As a result the client hanged waiting for a
response.
Now the function Item_name_const::fix_fields reports an error message
when any of the additional context conditions imposed on the function
NAME_CONST is not satisfied. 


mysql-test/r/func_misc.result:
  Added a test case for bug #26545.
mysql-test/t/func_misc.test:
  Added a test case for bug #26545.

The index (key_part_1, key_part-2) was erroneously considered as compatible
with the required ordering in the function test_test_if_order_by_key when 
a query with an ORDER BY clause contained a condition of the form
  key_part_1=const OR key_part_1 IS NULL 
and the order list contained only key_part_2. This happened because the value
of the const_key_parts field in the KEYUSE structure was not formed correctly
for the keys that could be used for ref_or_null access. 
This was fixed in the code of the update_ref_and_keys function.
The problem could not manifest itself for MyISAM databases because the
implementation of the keys_to_use_for_scanning() handler function always
returns an empty bitmap for the MyISAM engine.


mysql-test/r/innodb_mysql.result:
  Added a test case for bug #32815.
mysql-test/t/innodb_mysql.test:
  Added a test case for bug #32815.
sql/sql_select.cc:
  Fixed bug #32815.
  The index (key_part_1, key_part-2) was erroneously considered as compatible
  with the required ordering in the function test_test_if_order_by_key when 
  a query with an ORDER BY clause contained a condition of the form
    key_part_1=const OR key_part_1 IS NULL 
  and the order list contained only key_part_2. This happened because the value
  of the const_key_parts field in the KEYUSE structure was not formed correctly
  for the keys that could be used for ref_or_null access. 
  This was fixed in the code of the update_ref_and_keys function.

mysql-test/mysql-test-run.pl:
  Add a way to remove options which mysql-test-run.pl no longer uses.  Since
  mysql-test-run.pl passes unrecognized options through to mysqld directly,
  it is not possible to just remove an option.  Otherwise it would be given
  to mysqld, which probably will not recognize it and will fail to start.
  
  Instead, we now explicitly ignore the option, and print a warning to
  the user.

into  trift2.:/MySQL/M50/push-5.0

into  ramayana.hindu.god:/home/tsmith/m/bk/maint/50


sql/sql_table.cc:
  Auto merged

into  ramayana.hindu.god:/home/tsmith/m/bk/maint/50


strings/ctype-simple.c:
  use local (null merge)

mysql-test/r/grant.result:
  Update test results to .test changes
mysql-test/t/grant.test:
  Drop users when done with them, to avoid skewing results of later tests.
  
  For example, running some test which examines the cardinality of the
  mysql.user table would fail if run right after this test, due to the
  extra users.

sql/sql_select.cc:
  Fix compiler warning (probably harmless, wrong integer size)

strings/ctype-simple.c:
  Backport quick fix to remove Windows compiler warnings.

into  mysql.com:/misc/mysql/31177/50-31177


mysql-test/r/ps_2myisam.result:
  Auto merged
mysql-test/r/ps_3innodb.result:
  Auto merged
mysql-test/r/ps_4heap.result:
  Auto merged
mysql-test/r/ps_5merge.result:
  Auto merged
mysql-test/r/ps_6bdb.result:
  Auto merged
mysql-test/r/ps_7ndb.result:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/mysqld.cc:
  Auto merged

additional fixes for BDB and correct assignment of both signed
and unsigned 64-bit data to unsigned system variables


mysql-test/r/ps_2myisam.result:
  account for UNSIGNED_FLAG
mysql-test/r/ps_3innodb.result:
  account for UNSIGNED_FLAG
mysql-test/r/ps_4heap.result:
  account for UNSIGNED_FLAG
mysql-test/r/ps_5merge.result:
  account for UNSIGNED_FLAG
mysql-test/r/ps_6bdb.result:
  account for UNSIGNED_FLAG
mysql-test/r/ps_7ndb.result:
  account for UNSIGNED_FLAG
mysys/my_getopt.c:
  We have correct signed/unsigned information now, so we no longer
  need to err on the side of caution.
sql/item_func.cc:
  Copy unsigned info over from entry so the item's data
  correctly describe it.
sql/mysqld.cc:
  BDB log buffer size: default can't be less than minimum
sql/set_var.cc:
  Handle signedness of in-values correctly when assigning to
  unsigned types, all the way up to 64-bit. Use handler from
  all three unsigned sysvar types.
sql/set_var.h:
  thd_ulonglong: Override default check with one for unsigned types

into  ramayana.hindu.god:/home/tsmith/m/bk/maint/50


mysql-test/r/ctype_ucs.result:
  Auto merged
mysql-test/t/ctype_ucs.test:
  Auto merged
sql/set_var.cc:
  Auto merged

into  ramayana.hindu.god:/home/tsmith/m/bk/maint/50


client/mysqldump.c:
  Auto merged
include/my_sys.h:
  Auto merged
libmysql/CMakeLists.txt:
  Auto merged
libmysql/Makefile.shared:
  Auto merged
myisam/ft_boolean_search.c:
  Auto merged
myisam/sort.c:
  Auto merged
mysql-test/t/cast.test:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
sql/field.cc:
  Auto merged
sql/ha_myisam.cc:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/set_var.h:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
mysql-test/mysql-test-run.pl:
  Manual merge
mysql-test/r/ctype_ucs.result:
  Manual merge
mysql-test/r/func_misc.result:
  Manual merge
mysql-test/t/binlog_killed.test:
  Manual merge
mysql-test/t/ctype_ucs.test:
  Manual merge
mysql-test/t/func_misc.test:
  Manual merge
sql/item_strfunc.h:
  Manual merge
strings/ctype-simple.c:
  Manual merge

into  ramayana.hindu.god:/home/tsmith/m/bk/maint/41


sql/set_var.cc:
  Auto merged
mysql-test/r/ctype_ucs.result:
  Manual merge
mysql-test/t/ctype_ucs.test:
  Manual merge

into  dl145s.mysql.com:/data0/mhansson/my50-bug30234


sql/sql_yacc.yy:
  Auto merged
mysql-test/r/delete.result:
  SCCS merged
mysql-test/t/delete.test:
  SCCS merged

Anti-patch. This patch undoes the previously pushed patch. It is 
null-merged in versions 5.1 and above since there the original 
patch is still desired.


mysql-test/r/delete.result:
  Bug#30234: Anti-patch
mysql-test/t/delete.test:
  Bug#30234: Anti-patch
sql/sql_yacc.yy:
  Bug#30234: Anti-patch

additional fixes for 64-bit


mysql-test/t/variables.test:
  replace 32-bit and 64-bit values
mysys/my_getopt.c:
  'mod' no longer used.
  on 64-bit, limit to (signed) (LONG)LONG_MAX to prevent badness
  in classes using longlong.

into  polly.(none):/home/kaa/src/maint/mysql-5.0-maint


mysql-test/t/insert.test:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
sql/field.cc:
  Auto merged

mysql-test/t/insert.test:
  Windows implements a different rounding rules in printf("%g"), thus we still need to do replace_result
mysql-test/t/variables.test:
  We need to do replace_result because variables are printed by another procedure.
sql/field.cc:
  Fixed the code to limit the precision to DBL_DIG.