optimizer does not honor IGNORE INDEX
 - Allow an index to be used for sorting the table 
   instead of filesort only if it is not disabled by
   IGNORE INDEX.

into  rakia.(none):/home/kgeorge/mysql/autopush/B20103-5.0-opt

 - make the client to respect the server-side 
   no_backslash_escapes option and disable the 
   special meaning of backslash also at client side.

into  rakia.(none):/home/kgeorge/mysql/autopush/B11551-5.0-opt

into  sunlight.local:/local_work/tmp_merge-5.0-opt-mysql

  After merge fix

into  rakia.(none):/home/kgeorge/mysql/autopush/B11551-5.0-opt

 
made DROP VIEW to continue on error and report an aggregated error 
 at its end. This makes it similar to DROP TABLE.

into  macbook.gmz:/Users/kgeorge/mysql/work/B21080-5.0-opt

  When executing ALTER TABLE all the attributes of the view were overwritten.
  This is contrary to the user's expectations.
  So some of the view attributes are preserved now : namely security and 
  algorithm. This means that if they are not specified in ALTER VIEW
  their values are preserved from CREATE VIEW instead of being defaulted.

into  sunlight.local:/local_work/tmp_merge-5.0-opt-mysql

into  rakia.(none):/home/kgeorge/mysql/autopush/B21019-5.0-opt

into  rakia.(none):/home/kgeorge/mysql/autopush/B20792-4.1-opt

into  rakia.(none):/home/kgeorge/mysql/autopush/B20792-5.0-opt

into  moonbone.local:/work/19862-bug-5.0-opt-mysql

  Post review changes for bug#19862.

into  rakia.(none):/home/kgeorge/mysql/autopush/B20792-4.1-opt

into  macbook.gmz:/Users/kgeorge/mysql/work/B20792-5.0-opt

When processing aggregate functions all tables values are reset
to NULLs at the end of each group. 
When doing that if there are no rows found for a group
the const tables must not be reset as they are not recalculated 
by do_select()/sub_select() for each group.

into  rakia.(none):/home/kgeorge/mysql/autopush/B21019-4.1-opt

  Correct merge

into  macbook.gmz:/Users/kgeorge/mysql/work/B21019-5.0-opt

 When optimizing conditions like 'a = <some_val> OR a IS NULL' so that they're
 united into a single condition on the key and checked together the server must 
 check which value is the NULL value in a correct way : not only using ->is_null 
 but also check if the expression doesn't depend on any tables referenced in the 
 current statement. 
 This additional check must be performed because that optimization takes place 
 before the actual execution of the statement, so if the field was initialized 
 to NULL from a previous statement the optimization would be applied incorrectly.

into  rakia.(none):/home/kgeorge/mysql/autopush/B21086-5.0-opt

into  lamia.home:/home/tkatchaounov/autopush/4.1-bug-20954

The problem was in that opt_sum_query() replaced MIN/MAX functions
with the corresponding constant found in a key, but due to imprecise
representation of float numbers, when evaluating the where clause,
this comparison failed.

When MIN/MAX optimization detects that all tables can be removed,
also remove all conjuncts in a where clause that refer to these
tables. As a result of this fix, these conditions are not evaluated
twice, and in the case of float number comparisons we do not discard
result rows due to imprecise float representation.

As a side-effect this fix also corrects an unnoticed problem in
bug 12882.

into  moonbone.local:/work/19862-bug-5.0-opt-mysql

When there is no index defined filesort is used to sort the result of a
query. If there is a function in the select list and the result set should be
ordered by it's value then this function will be evaluated twice. First time to
get the value of the sort key and second time to send its value to a user.
This happens because filesort when sorts a table remembers only values of its
fields but not values of functions.
All functions are affected. But taking into account that SP and UDF functions
can be both expensive and non-deterministic a temporary table should be used 
to store their results and then sort it to avoid twice SP evaluation and to 
get a correct result.

If an expression referenced in an ORDER clause contains a SP or UDF 
function, force the use of a temporary table.

A new Item_processor function called func_type_checker_processor is added
to check whether the expression contains a function of a particular type.

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

  When executing INSERT over a view with calculated columns it was assuming all
  elements of the fields collection are actually Item_field instances.
  This may not be true when inserting into a view and that view has columns that are 
  such expressions that allow updating (like setting a collation for example).
  Corrected to access field information through the filed_for_view_update() function and 
  retrieve correctly the field info even for "update-friendly" non-Item_field items.

into  rakia.(none):/home/kgeorge/mysql/autopush/B16712-5.0-opt

  when calculating GROUP_CONCAT all blob fields are transformed
  to varchar when making the temp table.
  However a varchar has at max 2 bytes for length. 
  This fix makes the conversion only for blobs whose max length 
  is below that limit. 
  Otherwise blob field is created by make_string_field() call.

a non-correlated single-row subquery over information schema.

The function get_all_tables filling all information schema
tables reset lex->sql_command to SQLCOM_SHOW_FIELDS. After
this the function could evaluate partial conditions related to
some columns. If these conditions contained a subquery over
information schema it led to a wrong evaluation and a wrong 
result set.
This bug was already fixed in 5.1.
This patch follows the way how it was done in 5.1 where
the value of lex->sql_command is set to SQLCOM_SHOW_FIELDS
in get_all_tables only for the calls of the function 
open_normal_and_derived_tables and is restored after these
calls.

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

subqueries on information schema that use MIN/MAX aggregation.

Execution of some correlated subqueries may set the value
of null_row to 1 for tables used in the subquery.
If the the subquery is on information schema it causes
rejection of any row for the following executions of
the subquery in the case when an optimization filtering
by some condition is applied.

The fix restores the value of the null_row flag for 
each execution of a subquery on information schema.

into  macbook.mshome.net:/Users/kgeorge/mysql/work/B20466-5.0-opt

into  rakia.(none):/home/kgeorge/mysql/autopush/B20868-5.0-opt

into  rakia.(none):/home/kgeorge/mysql/autopush/B20868-5.0-opt

into  mysql.com:/home/psergey/mysql-5.0-opt2