When processing the USE/FORCE index hints
the optimizer was not checking if the indexes 
specified are enabled (see ALTER TABLE).
Fixed by:
 Backporting the fix for bug 20604 to 5.0


mysql-test/r/key.result:
  Test for BUG 20604.
  The important part of the test is the explain output that 
  tests what indexes are used.
mysql-test/r/myisam.result:
  Bug #28476: test cases
mysql-test/t/key.test:
  Bug 20604: 
  The minimal test case that reveals the bug. The optimizer for 
  aggregates relies on keys disabled with ALTER TABLE ... DISABLE KEYS
  not being in the set TABLE::keys_in_use_for_query.
  When the execution engine tries to use a disabled index, MyISAM
  returns an error.
mysql-test/t/myisam.test:
  Bug #28476: test cases
sql/sql_base.cc:
  Bug #28476: 
   - Ignore disabled indexes in USE/FORCE index
sql/sql_select.cc:
  Bug 20604 : The intersection operation between table->s->keys_in_use 
  and table->keys_in_use_for_query is no longer necessary.
  We can trust that the latter is a subset of the former.
sql/table.h:
  Bug 20604:
  Added comments to TABLE_SHARE::keys_in_use and
  TABLE::keys_in_use_for_query.

into  mysql.com:/home/hf/work/8663/my50-8663

into  mysql.com:/home/hf/work/8663/my50-8663

into  linux-st28.site:/home/martin/mysql/src/5.0o-bug27573


mysql-test/r/func_group.result:
  Auto merged
mysql-test/t/func_group.test:
  bug#27573: hand merged test case

in the case of the overflow in the decimal->integer conversion
we didn't return the proper boundary value, but just the result
of the conversion we calculated on the moment of the error


mysql-test/r/bigint.result:
  bug #8663 cant use bigint unsigned as input to cast
  test result fixed
mysql-test/t/bigint.test:
  bug #8663 cant use bigint unsigned as input to cast
  test case
strings/decimal.c:
  bug #8663 cant use bigint unsigned as input to cast
  decimal->int conversion fixed to return proper boundary value
  in the case of overflow

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug28272

function.

A wrong  condition was used to check that the
Arg_comparator::can_compare_as_dates() function calculated the value of the
string constant. When comparing a non-const STRING function with a constant
DATETIME function it leads to saving an arbitrary value as a cached value of
the DATETIME function.

Now the Arg_comparator::set_cmp_func() function initializes the const_value
variable to the impossible DATETIME value (-1) and this const_value is
cached only if it was changed by the Arg_comparator::can_compare_as_dates()
function.


mysql-test/t/type_datetime.test:
  Added a test case for the bug#28208: Wrong result of a non-const STRING function with a const DATETIME function.
mysql-test/r/type_datetime.result:
  Added a test case for the bug#28208: Wrong result of a non-const STRING function with a const DATETIME function.
sql/item_cmpfunc.cc:
  Bug#28208: Wrong result of a non-const STRING function with a const DATETIME
  function.
  Now the Arg_comparator::set_cmp_func() function initializes the const_value
  variable to the impossible DATETIME value (-1) and this const_value is
  cached only if it was changed by the Arg_comparator::can_compare_as_dates()
  function.

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug28272


mysql-test/r/innodb_mysql.result:
  Auto merged
mysql-test/t/innodb_mysql.test:
  Auto merged
sql/sql_select.cc:
  Manual merge

to NULL

For queries of the form SELECT MIN(key_part_k) FROM t1 
WHERE key_part_1 = const and ... and key_part_k-1 = const,
the opt_sum_query optimization tries to
use an index to substitute MIN/MAX functions with their values according
to the following rules:
1) Insert the minimum non-null values where the WHERE clause still matches, or
3) A row of nulls

However, the correct semantics requires that there is a third case 2)
such that a NULL value is substituted if there are only NULL values for 
key_part_k.

The patch modifies opt_sum_query() to handle this missing case.


mysql-test/r/func_group.result:
  Bug #27573: Correct result
mysql-test/t/func_group.test:
  Bug #27573: test case
sql/opt_sum.cc:
  Bug #27573:
  Added code that will try to read the
  first non-null value for a given complete-field prefix, second
  choice is to read the null, and lastly set the error code if no row
  is found.

for a query over an empty table right after its creation. 
The crash is the result of an attempt made by JOIN::optimize to evaluate
the WHERE condition when no records have been actually read.
The added test case can reproduce the crash only with InnoDB tables and
only with 5.0.x.
 


mysql-test/r/innodb_mysql.result:
  Added a test case for bug #28272.
mysql-test/t/innodb_mysql.test:
  Added a test case for bug #28272.
sql/sql_select.cc:
  Fixed bug #28272: crash that occurs when running an EXPLAIN command
  for a query over an empty table right after its creation. 
  The crash is the result of an attempt made by JOIN::optimize to evaluate
  the WHERE condition when no records have been actually read.
  Such attempts could be observed only with EXPLAIN commands.
  Now at the optimization phase the WHERE condition is never evaluated if 
  there is no record previously read from the table.

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug27937


mysql-test/r/ps.result:
  Manual merge
mysql-test/t/ps.test:
  Manual merge
sql/sql_union.cc:
  Manual merge

statement from a UNION query with ORDER BY an expression containing
RAND().
The crash happened because the global order by list in the union query
was not re-initialized for execution.
(Local order by lists were re-initialized though).



mysql-test/r/ps.result:
  Added a test case for bug #27937.
mysql-test/t/ps.test:
  Added a test case for bug #27937.
sql/sql_union.cc:
  Fixed bug #27937: crash for the the second execution of a prepared
  statement from a UNION query with ORDER BY an expression containing
  RAND().
  The crash happened because the global order by list in the union query
  was not re-initialized for execution.
  (Local order by lists were re-initialized though).
  Added re-initialization of the global order by list in the function
  st_select_lex_unit::init_prepare_fake_select_lex.

into  dl145s.mysql.com:/users/mhansson/mysql/autopush/5.0o-5.0o-bug28273

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-opt

a crash when the left operand of the predicate is evaluated to NULL.
It happens when the rows from the inner tables (tables from the subquery)
are accessed by index methods with key values obtained by evaluation of
the left operand of the subquery predicate. When this predicate is
evaluated to NULL an alternative access with full table scan is used
to check whether the result set returned by the subquery is empty or not.
The crash was due to the fact the info about the access methods used for
regular key values was not properly restored after a switch back from the
full scan access method had occurred.
The patch restores this info properly.
The same problem existed for queries with IN subquery predicates if they
were used not at the top level of the queries.


mysql-test/r/subselect3.result:
  Added a test case for bug #28375.
mysql-test/t/subselect3.test:
  Added a test case for bug #28375.
sql/item_subselect.cc:
  Fixed bug #28375: a query with an NOT IN subquery predicate may cause
  a crash when the left operand of the predicate is evaluated to NULL.
  It happens when the rows from the inner tables (tables from the subquery)
  are accessed by index methods with key values obtained by evaluation of
  the left operand of the subquery predicate. When this predicate is
  evaluated to NULL an alternative access with full table scan is used
  to check whether the result set returned by the subquery is empty or not.
  The crash was due to the fact the info about the access methods used for
  regular key values was not properly restored after a switch back from the
  full scan access method had occurred.
  The patch restores this info properly.
sql/sql_select.h:
  Fixed bug #28375: a query with an NOT IN subquery predicate may cause
  a crash when the left operand of the predicate is evaluated to NULL.
  In the JOIN_TAB structure two fields have been added to save info about
  index methods used to access the subquery rows. The saved info is used
  after a switch back from the alternative full scan access method has 
  occurred. The full scan is used when the left operand of the subquery
  predicate is evaluated to NULL.

into  moonbone.local:/mnt/gentoo64/work/27878-bug-5.0-opt-mysql

  Corrected test case for the bug#27878.


mysql-test/t/grant.test:
  Corrected test case for the bug#27878.
mysql-test/r/grant.result:
  Corrected test case for the bug#27878.

into  mysql.com:/home/hf/work/27957/my50-27957

into  moonbone.local:/mnt/gentoo64/work/27878-bug-5.0-opt-mysql

database.

If a user has a right to update anything in the current database then the 
access was granted and further checks of access rights for underlying tables
wasn't done correctly. The check is done before a view is opened and thus no
check of access rights for underlying tables can be carried out.
This allows a user to update through a view a table from another database for
which he hasn't enough rights.

Now the mysql_update() and the mysql_test_update() functions are forces
re-checking of access rights after a view is opened.


mysql-test/t/grant.test:
  Added a test case for the bug#27878: Unchecked privileges on a view referring to a table from another database.
mysql-test/r/grant.result:
  Added a test case for the bug#27878: Unchecked privileges on a view referring to a table from another database.
sql/sql_update.cc:
  Bug#27878: Unchecked privileges on a view referring to a table from another 
  database.
  Now the mysql_update() function forces re-checking of access rights after 
  the view is opened.
sql/sql_prepare.cc:
  Bug#27878: Unchecked privileges on a view referring to a table from another 
  database.
  Now the mysql_test_update() function forces re-checking of access rights after
  the view is opened.

mysql-test/r/type_datetime.result:
  result fixed
mysql-test/t/type_datetime.test:
  testcase fixed
sql/item_func.cc:
  my_decimal_length_to_precision used
sql/my_decimal.h:
  merging fix

into  mysql.com:/home/hf/work/27957/my50-27957


mysql-test/r/cast.result:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/my_decimal.h:
  merging

When using GROUP_CONCAT with ORDER BY, a tree is used for the sorting, as 
opposed to normal nested loops join used when there is no ORDER BY. 

The tree traversal that generates the result counts the lines that have been 
cut down. (as they get cut down to the field's max_size)
But the check of that count was before the tree traversal, so no 
warning was generated if the output is truncated.

Fixed by moving the check to after the tree traversal.


mysql-test/r/func_gconcat.result:
  bug#28273: correct result
mysql-test/t/func_gconcat.test:
  bug#28273: test case
sql/item_sum.cc:
  bug#28273: the fix
  
  Moved the code that outputs a warning to after temporary table (tree) is traversed.

into  mysql.com:/home/hf/work/27957/my50-27957


sql/item_func.cc:
  Auto merged

Bug occurs in INSERT IGNORE ... SELECT ... ON DUPLICATE KEY UPDATE
statements, when SELECT returns duplicated values and UPDATE clause
tries to assign NULL values to NOT NULL fields.
NOTE: By current design MySQL server treats INSERT IGNORE ... ON
DUPLICATE statements as INSERT ... ON DUPLICATE with update of
duplicated records, but MySQL manual lacks this information.
After this fix such behaviour becomes legalized.

The write_record() function was returning error values even within
INSERT IGNORE, because ignore_errors parameter of
the fill_record_n_invoke_before_triggers() function call was
always set to FALSE. FALSE is replaced by info->ignore.


sql/sql_insert.cc:
  Fixed bug #28000:
  The write_record() function was returning error values even within
  INSERT IGNORE, because ignore_errors parameter of
  the fill_record_n_invoke_before_triggers() function call was
  always set to FALSE. FALSE is replaced by info->ignore.
mysql-test/t/insert_update.test:
  Added test case for bug #28000.
mysql-test/r/insert_update.result:
  Added test case for bug #28000.

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb


ndb/src/mgmclient/CommandInterpreter.cpp:
  Auto merged

ref access to a less expensive range access. 
This occurred only with InnoDB tables.


mysql-test/r/innodb_mysql.result:
  Added a test case for bug #28189.
mysql-test/t/innodb_mysql.test:
  Added a test case for bug #28189.

into  whalegate.ndb.mysql.com:/home/tomas/mysql-4.1-ndb

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

test result fixed

Item_decimal_typecast::print properly implemented


mysql-test/r/view.result:
  Bug #27921 View ignores precision for CAST()
  test result
mysql-test/t/view.test:
  Bug #27921 View ignores precision for CAST()
  test case
sql/field.cc:
  zero decimals handling unified
sql/item_create.cc:
  Bug #27921 View ignores precision for CAST()
  create_func_cast parameters changed, zero precision handling unified
sql/item_create.h:
  Bug #27921 View ignores precision for CAST()
  create_func_cast parameters changed
sql/item_func.cc:
  Bug #27921 View ignores precision for CAST() 
  Item_decimal_typecast::print properly implemented
sql/item_func.h:
  Bug #27921 View ignores precision for CAST()
  max_length counting fixed
sql/my_decimal.h:
  Bug #27921 View ignores precision for CAST()
  my_decimal_trim() implemented to unify zero precision handling
sql/sql_yacc.yy:
  Bug #27921 View ignores precision for CAST()
  create_func_cast calls simplified

enable setting api reg req frequency to be higher than heartbeat setting to ensure we have reasonably up-to-date info from ndb nodes
+ do this for management server

  - corrected previous patch
  - some platforms do strange things with char... use Int8 to be sure of signedness

Missing check for overflow added to the Item_decimal_typecast::val_decimal


include/decimal.h:
  Bug #27957 cast as decimal does not check overflow, also inconsistent with group, subselect
  decimal_intg() declaration
mysql-test/r/cast.result:
  Bug #27957 cast as decimal does not check overflow, also inconsistent with group, subselect
  result fixed
mysql-test/r/type_newdecimal.result:
  Bug #27957 cast as decimal does not check overflow, also inconsistent with group, subselect
  test result
mysql-test/t/type_newdecimal.test:
  Bug #27957 cast as decimal does not check overflow, also inconsistent with group, subselect
  test case added
sql/item_func.cc:
  Bug #27957 cast as decimal does not check overflow, also inconsistent with group, subselect
  now we check for possible ovreflow in Item_decimal_typecast::val_decimal
sql/my_decimal.h:
  Bug #27957 cast as decimal does not check overflow, also inconsistent with group, subselect
  my_decimal_intg() implemented
strings/decimal.c:
  Bug #27957 cast as decimal does not check overflow, also inconsistent with group, subselect
  decimal_intg() implemented

  A test case is corrected.


mysql-test/t/loaddata.test:
  A test case is corrected.
mysql-test/r/loaddata.result:
  A test case is corrected.

- some platforms do strange things with char... use Int8 to be sure of signedness

into  moonbone.local:/mnt/gentoo64/work/27670-bug-5.0-opt-mysql

TIMESTAMP field when no value has been provided.

The LOAD DATA sets the current time in the TIMESTAMP field with
CURRENT_TIMESTAMP default value when the field is detected as a null.
But when the LOAD DATA command loads data from a file that doesn't contain
enough data for all fields then the rest of fields are simply set to null
without any check. This leads to no value being inserted to such TIMESTAMP
field.

Now the read_sep_field() and the read_fixed_length() functions set current
time to the TIMESTAMP field with CURRENT_TIMESTAMP default value in all cases
when a NULL value is loaded to the field.


mysql-test/t/loaddata.test:
  Added a test case for the bug#27670: LOAD DATA does not set CURRENT_TIMESTAMP
  default value for a TIMESTAMP field when no value has been provided.
mysql-test/r/loaddata.result:
  Added a test case for the bug#27670: LOAD DATA does not set CURRENT_TIMESTAMP
  default value for a TIMESTAMP field when no value has been provided.
sql/sql_load.cc:
  Bug#27670: LOAD DATA does not set CURRENT_TIMESTAMP default value for a
  TIMESTAMP field when no value has been provided.
  Now the read_sep_field() and the read_fixed_length() functions set current
  time to the TIMESTAMP field with CURRENT_TIMESTAMP default value in all cases
  when a NULL value is loaded to the field.