When the SUBSTRING() function was used over a LONGTEXT field the max_length of
the SUBSTRING() result was wrongly calculated and set to 0. As the max_length
parameter is used while tmp field creation it limits the length of the result
field and leads to printing an empty string instead of the correct result.

Now the Item_func_substr::fix_length_and_dec() function correctly calculates
the max_length parameter.

  Postfix for bug#22331 for windows platform.
explain.test, explain.result:
  Cleanup after bugfix#22331.

into  moonbone.local:/mnt/gentoo64/work/25373-bug-5.0-opt-mysql

into  moonbone.local:/mnt/gentoo64/work/25373-bug-5.0-opt-mysql

result.

For built-in functions like sqrt() function names are hard-coded and can be
compared by pointer. But this isn't the case for a used-defined stored
functions - names there are dynamical and should be compared as strings.

Now the Item_func::eq() function employs my_strcasecmp() function to compare
used-defined stored functions names.

away.

During optimization stage the WHERE conditions can be changed or even
be removed at all if they know for sure to be true of false. Thus they aren't
showed in the EXPLAIN EXTENDED which prints conditions after optimization.

Now if all elements of an Item_cond were removed this Item_cond is substituted
for an Item_int with the int value of the Item_cond.
If there were conditions that were totally optimized away then values of the
saved cond_value and having_value will be printed instead.

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug26560

into  magare.gmz:/home/kgeorge/mysql/autopush/B19342-5.0-opt

into  moonbone.local:/mnt/gentoo64/work/25376-bug-5.0-opt-mysql

Functions over sum functions wasn't set up correctly for the ORDER BY clause
which leads to a wrong order of the result set.

The split_sum_func() function is called now for each ORDER BY item that
contains a sum function to set it up correctly.

into  magare.gmz:/home/kgeorge/mysql/autopush/B19342-5.0-opt

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

The flag alias_name_used was not set on for the outer references
in subqueries. It resulted in replacement of any outer reference
resolved against an alias for a full field name when the frm 
representation of a view with a subquery was generated. 
If the subquery and the outer query referenced the same table in
their from lists this replacement effectively changed the meaning
of the view and led to wrong results for selects from this view. 

Modified several functions to ensure setting the right value of
the alias_name_used flag for outer references resolved against
aliases.
 

When the ORDER BY clause gets fixed it's allowed to search in the current
item_list in order to find aliased fields and expressions. This is ok for a
SELECT but wrong for an UPDATE statement. If the ORDER BY clause will
contain a non-existing field which is mentioned in the UPDATE set list
then the server will crash due to using of non-existing (0x0) field.

When an Item_field is getting fixed it's allowed to search item list for
aliased expressions and fields only for selects.

into  magare.gmz:/home/kgeorge/mysql/autopush/B19342-5.0-opt

into  magare.gmz:/home/kgeorge/mysql/autopush/B19342-5.0-opt

Several problems here :
 1. The conversion to double of an hex string const item
 was not taking into account the unsigned flag.
 
 2. IN was not behaving in the same was way as comparisons
 when performed over an INT/DATE/DATETIME/TIMESTAMP column
 and a constant. The ordinary comparisons in that case 
 convert the constant to an INTEGER value and do int 
 comparisons. Fixed the IN to do the same.
 
 3. IN is not taking into account the unsigned flag when 
 calculating <expr> IN (<int_const1>, <int_const2>, ...).
 Extended the implementation of IN to store and process
 the unsigned flag for its arguments.

into  magare.gmz:/home/kgeorge/mysql/autopush/B26537-5.0-opt

  Post fix for bug#25122.

to return NULL for non-NULL arguments.
This is not the case as it can return NULL
for invalid hexidecimal strings.
Fixed by setting the maybe_null flag.

into  moonbone.local:/mnt/gentoo64/work/25122-bug-5.0-opt-mysql

When INSERT is done over a view the table being inserted into is 
checked to be unique among all views tables. But if the view contains
self-joined table an error will be thrown even if all tables are used under
different aliases.

The unique_table() function now also checks tables' aliases when needed.

in build.

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

  Post fix for bug#23800.

  Post fix for bug#23800.
  Copy the table name of an Item_outer_ref to the conventional memory.

into  moonbone.local:/mnt/gentoo64/work/23800-bug1-5.0-opt-mysql

  Post fix for bug#23800.
  The Item_field constructor now increases the select_n_where_fields counter.
sql_yacc.yy:
  Post fix for bug#23800.
  Take into account fields that might be added by subselects.
sql_lex.h:
  Post fix for bug#23800.
  Added the select_n_where_fields variable to the st_select_lex class.
sql_lex.cc:
  Post fix for bug#23800.
  Initialization of the select_n_where_fields variable.

into  mysql.com:/home/my/mysql-5.0

into  mysql.com:/home/my/mysql-5.0

into  mysql.com:/home/my/mysql-5.0

Suppress compiler warnings from bdb and (for the moment) warnings from ndb

into  mysql.com:/home/my/mysql-5.0

Fixed a couple of usage of not initialized warnings (unlikely cases)

into  dl145s.mysql.com:/users/mhansson/mysql/autopush/5.0o-bug24010