The optimizer takes away columns from GROUP BY/DISTINCT if they constitute
 all the parts of an unique index.
 However if some of the columns can contain NULLs this cannot be done 
(because an UNIQUE index can have multiple rows with NULL values).
 Fixed by not using UNIQUE indexes with nullable columns to remove
 grouping columns from GROUP BY/DISTINCT.


mysql-test/r/distinct.result:
  Bug #25551: inconsistent behaviour in grouping NULL, depending on index type
   - test case
mysql-test/t/distinct.test:
  Bug #25551: inconsistent behaviour in grouping NULL, depending on index type
   - test case
sql/sql_select.cc:
  Bug #25551: inconsistent behaviour in grouping NULL, depending on index type
   - UNIQUE NULL indices don't guarantee GROUP BY/DISTINCT.

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug25580

into  moonbone.local:/work/25172-bug-5.0-opt-mysql

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug25580


mysql-test/r/subselect.result:
  Auto merged

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug25580

After fix for bug#21798 JOIN stores the pointer to the buffer for sorting
fields. It is used while sorting for grouping and for ordering. If ORDER BY
clause has more elements then the GROUP BY clause then a memory overrun occurs.

Now the length of the ORDER BY list is always passed to the 
make_unireg_sortorder() function and it allocates buffer big enough to be
used for bigger list.


sql/sql_delete.cc:
  Bug#25172: Not checked buffer size leads to a server crash.
  Length parameter is initialized to 0 for the make_unireg_sortorder() function.
sql/sql_select.cc:
  Bug#25172: Not checked buffer size leads to a server crash.
  Now the length of the ORDER BY list is always passed to the 
  make_unireg_sortorder() function and it allocates buffer big enough to be
  used for bigger list.
sql/sql_table.cc:
  Bug#25172: Not checked buffer size leads to a server crash.
  Length parameter is initialized to 0 for the make_unireg_sortorder() function.
sql/sql_update.cc:
  Bug#25172: Not checked buffer size leads to a server crash.
  Length parameter is initialized to 0 for the make_unireg_sortorder() function.
mysql-test/r/select.result:
  Added a test case for bug#25172: Not checked buffer size leads to a server crash.
mysql-test/t/select.test:
  Added a test case for bug#25172: Not checked buffer size leads to a server crash.

UNION over correlated and uncorrelated SELECTS.
In such subqueries each uncorrelated SELECT should be considered as
uncacheable. Otherwise join_free is called for it and in many cases
it causes some problems.


mysql-test/r/subselect.result:
  Added a test case for bug #25219.
mysql-test/t/subselect.test:
  Added a test case for bug #25219.
sql/mysql_priv.h:
  Fixed bug #25219: crash for a query that contains an EXIST subquery with
  UNION over correlated and uncorrelated SELECTS.
  In such subqueries each uncorrelated SELECT should be considered as
  uncacheable. Otherwise join_free is called for it and in many cases
  it causes some problems. 
  Added a new flag UNCACHEABLE_UNITED for such SELECTs.
sql/sql_lex.cc:
  Fixed bug #25219: crash for a query that contains an EXIST subquery with
  UNION over correlated and uncorrelated SELECTS.
  In such subqueries each uncorrelated SELECT should be considered as
  uncacheable. Otherwise join_free is called for it and in many cases
  it causes some problems.
  Added a new flag UNCACHEABLE_UNITED for such SELECTs.

into  rakia.gmz:/home/kgeorge/mysql/autopush/B25382-5.0-opt

 crashes server
 Check for null value is reliable only after calling some of the 
 val_xxx() methods. If the val_xxx() method is not called
 the null_value flag will be set only for certain types of NULL
 values (like SQL constant NULLs for example).
 This caused a crash while trying to dereference a NULL pointer
 that is returned by val_str() for NULL values.
 Fixed by swapping the order of val_xxx() and null_value check.


mysql-test/r/udf.result:
  Bug #25382: Passing NULL to an UDF called from stored procedures 
   crashes server
   - test case
mysql-test/t/udf.test:
  Bug #25382: Passing NULL to an UDF called from stored procedures 
   crashes server
   - test case
sql/item_func.cc:
  Bug #25382: Passing NULL to an UDF called from stored procedures 
   crashes server
   - reliably check null_value

when they contain the '!' operator.
Added an implementation for the method Item_func_not::print. 
The method encloses any NOT expression into extra parentheses to avoid
incorrect stored representations of views that use the '!' operators.
Without this change when a view was created that contained
the expression !0*5  its stored representation contained not this
expression but rather the expression not(0)*5 . 
The operator '!' is of a higher precedence than '*', while NOT is 
of a lower precedence than '*'. That's why the expression !0*5 
is interpreted as not(0)*5, while the expression not(0)*5 is interpreted
as not((0)*5) unless sql_mode is set to HIGH_NOT_PRECEDENCE.
Now we translate !0*5 into (not(0))*5. 


mysql-test/r/sp-code.result:
  Adjusted results after the fix of bug 25580.
mysql-test/r/subselect.result:
  Adjusted results after the fix of bug 25580.
mysql-test/r/view.result:
  Added a test case for bug #25580.
mysql-test/t/view.test:
  Added a test case for bug #25580.
sql/item_cmpfunc.cc:
  Fixed bug #25580: incorrect stored representations of views in cases
  when they contain the '!' operator.
  Added an implementation for the method Item_func_not::print. 
  The method encloses the NOT expression into extra parenthesis to avoid
  incorrect stored representations of views that use the '!' operators.
sql/item_cmpfunc.h:
  Fixed bug #25580: incorrect stored representations of views in cases
  when they contain the '!' operator.
  Added an implementation for the method Item_func_not::print. 
  The method encloses the NOT expression into extra parenthesis to avoid
  incorrect stored representations of views that use the '!' operators.

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

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

  Fix for crashes on 64bit platforms after fixing bug#23417.


sql/sql_select.cc:
  Fix for crashes on 64bit platforms after fixing bug#23417.

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


mysql-test/r/range.result:
  Auto merged
mysql-test/t/range.test:
  Auto merged
sql/opt_range.h:
  Manual merge.

into  rakia.gmz:/home/kgeorge/mysql/autopush/B20420-5.0-opt


sql/item_cmpfunc.h:
  Auto merged

 The optimizer needs to evaluate whether predicates are better
 evaluated using an index. IN is one such predicate.
 To qualify an IN predicate must involve a field of the index
 on the left and constant arguments on the right.
 However whether an expression is a constant can be determined only
 by knowing the preceding tables in the join order. 
 Assuming that only IN predicates with expressions on the right that
 are constant for the whole query qualify limits the scope of 
 possible optimizations of the IN predicate (more specifically it
 doesn't allow the "Range checked for each record" optimization for
 such an IN predicate.
 Fixed by not pre-determining the optimizability of the IN predicate
 in the case when all right IN operands are not SQL constant expressions


mysql-test/r/func_in.result:
  BUG#20420: optimizer reports wrong keys on left join with IN
   - test case
mysql-test/t/func_in.test:
  BUG#20420: optimizer reports wrong keys on left join with IN
   - test case
sql/item_cmpfunc.h:
  BUG#20420: optimizer reports wrong keys on left join with IN
   - cannot decide on the optimizability of a function without
     knowing the tables before it in the join order

for queries using 'range checked for each record'.
The problem was fixed in 5.0 by the patch for bug 12291.
This patch down-ported the corresponding code from 5.0 into 
QUICK_SELECT::init() and added a new test case. 


mysql-test/r/range.result:
  Added a test case for bug #24776.
mysql-test/t/range.test:
  Added a test case for bug #24776.
sql/opt_range.h:
  Fixed bug #24776: an assertion abort in handler::ha_index_init
  for queries using 'range checked for each record'.
  The problem was fixed in 5.0 by the patch for bug 12291.
  The patch for 4.1 down-ported the corresponding code from 5.0 into 
  QUICK_SELECT::init().

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

in a select list.
The objects of the Item_trigger_field class inherited the implementations
of the methods copy_or_same, get_tmp_table_item and get_tmp_table_field
from the class Item_field while they rather should have used the default
implementations defined for the base class Item.
It could cause catastrophic problems for triggers that used SELECTs
with select list containing trigger fields such as NEW.<table column>
under DISTINCT.


mysql-test/r/trigger.result:
  Added a test case for bug #25398.
mysql-test/t/trigger.test:
  Added a test case for bug #25398.

  After merge fix


mysql-test/r/func_str.result:
  After merge fix

into  moonbone.local:/work/latest-5.0-opt-mysql


mysql-test/t/func_str.test:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/item_strfunc.h:
  Auto merged
sql/sql_delete.cc:
  Auto merged
mysql-test/r/delete.result:
  Manual merge
mysql-test/r/func_str.result:
  Manual merge
mysql-test/t/delete.test:
  Manual merge

into  moonbone.local:/work/23417-bug-5.0-opt-mysql


sql/sql_base.cc:
  Auto merged

Currently in the ONLY_FULL_GROUP_BY mode no hidden fields are allowed in the
select list. To ensure this each expression in the select list is checked
to be a constant, an aggregate function or to occur in the GROUP BY list.
The last two requirements are wrong and doesn't allow valid expressions like
"MAX(b) - MIN(b)" or "a + 1" in a query with grouping by a.

The correct check implemented by the patch will ensure that:
any field reference in the [sub]expressions of the select list 
  is under an aggregate function or
  is mentioned as member of the group list or
  is an outer reference or
  is part of the select list element that coincide with a grouping element.

The Item_field objects now can contain the position of the select list
expression which they belong to. The position is saved during the
field's Item_field::fix_fields() call.

The non_agg_fields list for non-aggregated fields is added to the SELECT_LEX
class. The SELECT_LEX::cur_pos_in_select_list now contains the position in the
select list of the expression being currently fixed.


sql/item.cc:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  The Item_field objects now contain the position of the select list
  expression which they belong to. The position is saved at the field's
  Item_field::fix_fields() call.
sql/item.h:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  The Item_field objects now can store the position in the select list of the
  expression to which they are belongs to.
sql/mysql_priv.h:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  Added the UNDEF_POS constant.
sql/sql_base.cc:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  Now the setup_fields() function maintains the cur_pos_in_select_list variable.
sql/sql_lex.cc:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  Set the cur_pos_in_select_list variable and the non_agg_fields list to their initial state.
sql/sql_lex.h:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  The non_agg_fields list for non-aggregated fields is added to the SELECT_LEX
  class. The SELECT_LEX::cur_pos_in_select_list now stores the position in the
  select list of the expression being currently fixed.
sql/sql_select.cc:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  Each select now keeps the list of fields that aren't
  used under any aggregate function. If an expression from the select list
  isn't found in the GROUP BY list the setup_group() function additionally
  checks whether non-aggregated fields occur in that expression.
  If there at least one such field and it isn't found in the GROUP BY list
  then an error is thrown.
sql/sql_union.cc:
  Bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
  Clean up of the non_agg_fields list.
mysql-test/r/group_by.result:
  Added a test case for the bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.
mysql-test/t/group_by.test:
  Added a test case for the bug#23417: Too strict checks against GROUP BY in the ONLY_FULL_GROUP_BY mode.

into  rakia.gmz:/home/kgeorge/mysql/autopush/B25106-5.0-opt


sql/sql_base.cc:
  Auto merged

           aliases ignored
When a column reference to a column in JOIN USING is resolved and a new 
Item is created for this column the user defined name was lost.
This fix preserves the alias by setting the name of the new Item to the
original alias.


mysql-test/r/join.result:
  BUG#25106: A USING clause in combination with a VIEW results in column
             aliases ignored
   - test case
mysql-test/t/join.test:
  BUG#25106: A USING clause in combination with a VIEW results in column
             aliases ignored
   - test case
sql/sql_base.cc:
  BUG#25106: A USING clause in combination with a VIEW results in column
             aliases ignored
   - take the alias of the Item to be replaced and set it into the newly
     allocated Item.

correctly.

The Item_func::print method was used to print the Item_func_encode and the
Item_func_decode objects. The last argument to ENCODE and DECODE functions
is a plain C string and thus Item_func::print wasn't able to print it.

The print() method is added to the Item_func_encode class. It correctly
prints the Item_func_encode and the Item_func_decode objects.


mysql-test/t/func_str.test:
  Added a test case for bug#23409: Arguments of the ENCODE() and the
  > DECODE() functionswere not printed correctly.
mysql-test/r/func_str.result:
  Added a test case for bug#23409: Arguments of the ENCODE() and the DECODE() functions were not printed correctly.
sql/item_strfunc.h:
  Bug#23409: Arguments of the ENCODE() and the DECODE() functions were not printed correctly.
  The print() method is added to the Item_func_encode class.
sql/item_strfunc.cc:
  Bug#23409: Arguments of the ENCODE() and the DECODE() functions were not printed correctly.
  The print() method is added to the Item_func_encode class. It correctly
  prints the Item_func_encode and the Item_func_decode objects.

WHERE is present.

If a DELETE statement with ORDER BY and LIMIT contains a WHERE clause
with conditions that for sure cannot be used for index access (like in
WHERE @var:= field) the execution always follows the filesort path.    
It happens currently even when for the above case there is an index that
can be used to speedup sorting by the order by list.

Now if a DELETE statement with ORDER BY and LIMIT contains such WHERE
clause conditions that cannot be used to build any quick select then
the mysql_delete() tries to use an index like there is no WHERE clause at all.


mysql-test/t/delete.test:
  Added a test case for bug#17711: DELETE doesn't use index when ORDER BY, LIMIT and non-restricting
  WHERE is present.
mysql-test/r/delete.result:
  Added a test case for bug#17711: DELETE doesn't use index when ORDER BY, LIMIT and non-restricting WHERE is present.
sql/sql_delete.cc:
  Bug#17711: DELETE doesn't use index when ORDER BY, LIMIT and non-restricting WHERE is present.
  Now if a DELETE statement with ORDER BY and LIMIT contains such WHERE
  clause conditions that cannot be used to build any quick select then
  the mysql_delete() tries to use an index like there is no WHERE clause at all.

into  mysql.com:/d2/hf/mr10/my50-mr10


sql/mysqld.cc:
  Auto merged

into  olga.mysql.com:/home/igor/mysql-4.1-opt

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


sql/item.cc:
  Auto merged
mysql-test/r/order_by.result:
  Manual merge
mysql-test/t/order_by.test:
  Manual merge

into  mysql.com:/d2/hf/mr10/my50-mr10

  Removed line accidently inserted when correcting bug#18526


configure.in:
  Removed line accidently inserted when correcting bug#18526

into  mysql.com:/d2/hf/mr10/my50-mr10

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


sql/mysqld.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/mysql_priv.h:
  manual merge

2nd version
During tmp tables cleanup we get the handler for temporary table
and delete table using handler method.


sql/mysql_priv.h:
  added function prototype
sql/mysqld.cc:
  added call of mysql_rm_tmp_tables() function
sql/sql_base.cc:
  mysql_rm_tmp_tables()
  -removed from table_cache_init
  -During tmp tables cleanup we get the handler for temporary table
   and delete table using handler method. 
   it allows to remove orphan records from data dictionary(InnoDB)

In the method Item_field::fix_fields we try to resolve the name of
the field against the names of the aliases that occur in the select
list. This is done by a call of the function find_item_in_list.
When this function finds several occurrences of the field name
it sends an error message to the error queue and returns 0.
Yet the code did not take into account that find_item_in_list
could return 0 and tried to dereference the returned value.


mysql-test/r/order_by.result:
  Added a test case for bug #25427.
mysql-test/t/order_by.test:
  Added a test case for bug #25427.
sql/item.cc:
  Fixed bug #25427.
  In the method Item_field::fix_fields we try to resolve the name of
  the field against the names of the aliases that occur in the select
  list. This is done by a call of the function find_item_in_list.
  When this function finds several occurrences of the field name 
  it sends an error message to the error queue and returns 0.
  Yet the code did not take into account that find_item_in_list
  could return 0 and tried to dereference the returned value.

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