Before this change, a local variables in stored procedures / stored functions
or triggers, when declared with a type of bit(N), would not evaluate their
value properly.

The problem was that the data was incorrectly typed as a string,
causing for example bit b'1', implemented as a byte 0x01, to be interpreted
as a string starting with the character 0x01. This later would cause
implicit conversions to integers or booleans to fail.

The root cause of this problem was an incorrect translation between field
types, like bit(N), and internal types used when representing values in Item
objects.

Also, before this change, the function HEX() would sometime print extra "0"
characters when invoked with bit(N) values.

With this fix, the type translation (sp_map_result_type, sp_map_item_type)
has been changed so that bit(N) fields are represented with integer values.

A consequence is that, for the function HEX(), when called with a stored
procedure local variable of type bit(N) as argument, HEX() is provided with an
integer instead of a string, and therefore does not print "0" padding.

A test case for Bug 12976 was present in the test suite, and has been updated.

           fails

The bug was introduced with the push of the fix for bug#20953: after
the error on view creation we never reset the error state, so some
valid statements would give the same error after that.

The solution is to properly reset the error state.

into  weblab.(none):/home/marcsql/TREE/mysql-5.0-21904

Before this fix, a IN predicate of the form: "IN (( subselect ))", with two
parenthesis, would be evaluated as a single row subselect: if the subselect
returns more that 1 row, the statement would fail.

The SQL:2003 standard defines a special exception in the specification,
and mandates that this particular form of IN predicate shall be equivalent
to "IN ( subselect )", which involves a table subquery and works with more
than 1 row.

This fix implements "IN (( subselect ))", "IN ((( subselect )))" etc
as per the SQL:2003 requirement.

All the details related to the implementation of this change have been
commented in the code, and the relevant sections of the SQL:2003 spec
are given for reference, so they are not repeated here.

Having access to the spec is a requirement to review in depth this patch.

into  moonlight.home:/home/tomash/src/mysql_ab/mysql-5.0-bug23527

           high load

MySQL server could crash if two or more threads would initiate query
cache resize at the moments very close in time.

The problem was introduced with the fix of bug 21051 in 5.0 and 5.1:
simultaneous query cache resizes would wait for the first one in
progress, but then each thread would try to finish the operation,
accessing the data that was already reset (attempt to dereference
'bins' pointer, which may be NULL already).

The solution is to check after synchronization if another thread has
done the reset already (test 'query_cache_size > 0' again).

No test case is provided because the bug is a subject to a race.

into  mockturtle.local:/home/dlenev/src/mysql-5.0-merge

into  mysql.com:/home/svoj/devel/mysql/merge/mysql-5.0-engines

into  mysql.com:/home/svoj/devel/mysql/merge/mysql-5.0-engines

the team tree for additional investigation.

into  mockturtle.local:/home/dlenev/src/mysql-5.0-merge

into  chilla.local:/home/mydev/mysql-5.0-bug24607

After merge fix

into  chilla.local:/home/mydev/mysql-5.0-bug24607

Fixed test. On 32-bit machines which compile without
-DBIG_TABLES, MAX_ROWS is truncated to a 32-bit value.
Using a value below 4G is portable.

into  kahlann.erinye.com:/home/df/mysql/build/mysql-5.0-build-work

into  mysql.com:/home/svoj/devel/mysql/BUG24401/mysql-5.0-engines

into  mysql.com:/home/svoj/devel/mysql/BUG24401/mysql-5.0-engines

into  mysql.com:/home/svoj/devel/mysql/BUG24401/mysql-4.1-engines

into  willster.(none):/home/stewart/Documents/MySQL/5.0/ndb-work

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

into  chilla.local:/home/mydev/mysql-4.1-bug24607

into  chilla.local:/home/mydev/mysql-5.0-bug24607

into  clam.ndb.mysql.com:/export/space/pekka/ndb/version/my50-ndb

into  willster.(none):/home/stewart/Documents/MySQL/5.0/bug25487

into  mockturtle.local:/home/dlenev/src/mysql-5.0-bg24491

into  mysql.com:/home/svoj/devel/mysql/BUG24401/mysql-5.0-engines

on duplicate key".

INSERT ... SELECT ... ON DUPLICATE KEY UPDATE which was used in
stored routine or as prepared statement and which in its ON DUPLICATE
KEY clause erroneously tried to assign value to a column mentioned only
in its SELECT part was properly emitting error on the first execution
but succeeded on the second and following executions.

Code which is responsible for name resolution of fields mentioned in
UPDATE clause (e.g. see select_insert::prepare()) modifies table list
and Name_resolution_context used in this process. It uses
Name_resolution_context_state::save_state/restore_state() to revert
these modifications. Unfortunately those two methods failed to revert
properly modifications to TABLE_LIST::next_name_resolution_table
and this broke name resolution process for successive executions.

This patch fixes Name_resolution_context_state::save_state/restore_state()
in such way that it properly handles TABLE_LIST::next_name_resolution_table.

  
  aim is to:
  a) if set_connect_timeout called, timeout connect attempt (for retry on
  next call) after timeout period
  b) preserve existing blocking behaviour otherwise (for, e.g. mgmapi)
  
  Related to customer issue with long time deleting ndb_cluster_connection
  object. believe we're hanging on the connect(2) call until timeout (when
  we then realise we should exit the thread).

    Fix bug in event handling wrt early node shutdown

- post review changes

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

- make sure keys are copied correctly when varchar has 2 length bytes
- test case

Do not propagate this change into main trees.

into  kahlann.erinye.com:/home/df/mysql/build/mysql-5.0-build-work