SET autocommit=1 while XA transaction is active may
cause various side effects, including memory corruption
and server crash.

The problem is that SET autocommit=1 and further queries
attempt to commit local transaction, whereas XA transaction
is still active.

As local and XA transactions are mutually exclusive, this
patch forbids enabling autocommit mode while XA transaction
is active.

MySQL uses two source layouts when building : the bzr 
layout and the source package layout.
The previous fix for bug 35250 contained 1 change that is
valid for both modes and a number of changes that are valid
only for the bzr source layout.
The important thing was to fix the source package layout.
And for this the change in configure.in was sufficient.
It's not trivial (and not requested by this bug) to support 
VPATH builds from the bzr trees.
This is why the other changes are reverted and the change to
fix the VPATH build for source distributions is left intact.

The test case added in previous patch missed a RESET MASTER on
test start up. Without it, showing binary log contents can
sometimes show spurious entries from previously executed tests,
ultimately causing test failure - result mismatch.

The test file was added in:
revid:luis.soares@sun.com-20100224190153-k0bpdx9abe88uoo2

This patch also moves the test case into binlog_innodb_row.test
file. This way we avoid having yet another test file,
binlog_row_innodb_truncate.test, whose only purpose is to host
one test case. This had been actually suggested during original
patch review, but somehow the binlog_innodb_row was missed when
searching for a file to host the test case.

mysql_upgrade was passing an non-initialized non-null tmpdir to create_temp_file() if no 
--tmpdir was specified. This prevents create_temp_file() from taking the system 
temporary file path and as a result mysql_upgrade was trying to open a file in a 
directory that it may not have write access to.
Fixed by making sure mysql_upgrade will pass a zero length temp dir string to 
create_temp_file() if no --tmpdir is specified.

output from HANDLER ... READ .. NEXT ...

The problem was that mysqltest could attempt to execute a
SHOW WARNINGS statement through a connection that was not
properly reaped, thus violating its own rules.

The solution is to skip SHOW WARNINGS if a connection has
not been properly repeaed.

The problem is that not all column names retrieved from a SELECT
statement can be used as view column names due to length and format
restrictions. The server failed to properly check the conformity
of those automatically generated column names before storing the
final view definition on disk.

Since columns retrieved from a SELECT statement can be anything
ranging from functions to constants values of any format and length,
the solution is to rewrite to a pre-defined format any names that
are not acceptable as a view column name.

The name is rewritten to "Name_exp_%u" where %u translates to the
position of the column. To avoid this conversion scheme, define
explict names for the view columns via the column_list clause.
Also, aliases are now only generated for top level statements.

The problem was that bits of the destructive equality propagation
optimization weren't being undone after the execution of a stored
program. Modifications to the parse tree that are based on transient
properties must be undone to enable the re-execution of stored
programs.

The solution is to cleanup any references to predicates generated
by the equality propagation during the execution of a stored program.

Spatial indexes were not checking for out-of-record condition in
the handler next command when the previous command didn't found
rows.

Fixed by making the rtree index to check for end of rows condition
before re-using the key from the previous search.

Fixed another crash if the tree has changed since the last search.
Added a test case for the other error.

Spatial indexes were not checking for out-of-record condition in
the handler next command when the previous command didn't found
rows.

Fixed by making the rtree index to check for end of rows condition
before re-using the key from the previous search.

Fixed another crash if the tree has changed since the last search.
Added a test case for the other error.

            consider clustered primary keys

Choosing a shortest index for the covering index scan,
the optimizer ignored the fact, that the clustered primary
key read involves whole table data.

The find_shortest_key function has been modified to
take into account that fact that a clustered PK has a
longest key of possible covering indices.

 for ORDER BY on a TEXT or VARCHAR field" backported to 5.1.

           + failing statements

Implicit DROP event for temporary table is not getting
LOG_EVENT_THREAD_SPECIFIC_F flag, because, in the previous
executed statement in the same thread, which might even be a
failed statement, the thread_specific_used flag is set to
FALSE (in mysql_reset_thd_for_next_command) and not set to TRUE
before connection is shutdown. This means that implicit DROP
event will take the FALSE value from thread_specific_used and
will not set LOG_EVENT_THREAD_SPECIFIC_F in the event header. As
a consequence, mysqlbinlog will not print the pseudo_thread_id
from the DROP event, because one of the requirements for the
printout is that this flag is set to TRUE.

We fix this by setting thread_specific_used whenever we are
binlogging a DROP in close_temporary_tables, and resetting it to
its previous value afterward.

If an outer query is broken, a subquery might not even get set up.
EXPLAIN EXTENDED did not expect this and merrily tried to de-ref all
of the half-setup info.

We now catch this case and print as much as we have, as it doesn't cost us
anything (doesn't make regular execution slower).

backport from 5.1

      
This patch fixes some typos and poorly formulated sentences in
the output from mysqld --help --verbose.

Some of the problems described in the bug report are already
handled by the patch for Bug#49447, and are therefore not
included in this patch.

START SLAVE UNTIL MASTER ... specifies only SQL thread to stop.
rpl_slave_skip erronously deployed waiting for stop of both threads.

Corrected with deploying the correct macro.
Notice, earlier a similar bug@47749 was fixed in mysql-trunk.