allow 'rename view' for ALTER ...UPGRADE DATA DIRECTORY NAME command.
it's safe because a view has valid internal db&table names in this case.

In some circumstances, when a table is created with
the IBMDB2I engine, the CREATE TABLE statement will
return successfully but the table will not exist.

The current patch addresses the above issue and causes
CREATE to fail and report and error to the user.

The utf8_swedish_ci and ucs2_swedish_ci
collations do not work with indexes on 
IBMDB2I tables.

The current patch adds the mapping for
ucs2_swedish collation and removes the 
ucs2_spanish2 mapping which is not
supported by any version of the operating
system.

	comment can't be read back

A change to the lexer in 5.1 caused slash-asterisk-bang-version
sections to be terminated early if there exists a slash-asterisk-
style comment inside it.  Nesting comments is usually illegal,
but we rely on versioned comment blocks in mysqldump, and the
contents of those sections must be allowed to have comments.

The problem was that when encountering open-comment tokens and
consuming -or- passing through the contents, the "in_comment"
state at the end was clobbered with the not-in-a-comment value,
regardless of whether we were in a comment before this or not.  

So, """/*!VER one /* two */ three */""" would lose its in-comment
state between "two" and "three".  Save the echo and in-comment
state, and restore it at the end of the comment if we consume a 
comment.

Bug#44091: libmysqld gets stuck waiting on mutex on initialization

The problem was that libmysqld wasn't enforcing a certain
initialization and deinitialization order for the mysys
library. Another problem was that the global object used
for management of log event handlers (aka LOGGER) wasn't
being prepared for a possible reutilization.

What leads to the hang/crash reported is that a failure
to load the language file triggers a double call of the
cleanup functions, causing an already destroyed mutex to
be used.

The solution is enforce a order on the initialization and
deinitialization of the mysys library within the libmysqld
library and to ensure that the global LOGGER object reset
it's internal state during cleanup.

Note: empty changeset.

routine does not exist 
      
There is an inconsistency with DROP DATABASE IF EXISTS, DROP TABLE IF
EXISTS and DROP VIEW IF EXISTS: those are binlogged even if the DB or
TABLE does not exist, whereas DROP PROCEDURE IF EXISTS does not. It
would be nice or at least consistent if DROP PROCEDURE/STATEMENT
worked the same too.
      
Fixed DROP PROCEDURE|FUNCTION IF EXISTS by adding a call to
mysql_bin_log.write in mysql_execute_command. Checked also if all 
documented "DROP (...) IF EXISTS" get binlogged.
      
NOTE: This is a 5.0 backport patch as requested by support.

The crash happens due to wrong 'digits' variable value(0),
'digits' can not be 0, so the fix is use 1 as min allowed value.

            
Currently the memory map is being created
with a size that is greater than the size 
of the underlying datafile. This can cause
varying behaviour,

e.g. 

In windows the size of the datafile
is increased, while on linux it remains
the same.

This fix removes the increment margin to
the size that is used while creating the
memory map.

Binlog the CREATE EVENT unless the created event been successfully dropped

Modified Query_log_event constructor to make sure that error_code
is not set to ER_SERVER_SHUTDOWN or ER_QUERY_INTERRUPTED errors
when NOT_KILLED

The result set for multi-row statements is not the same between STMT and
RBR and among different versions. Thus to avoid test failures, we are not
printing out such result sets. Note, however, that this does not have
impact on coverage and accuracy since the execution is able to continue
without further issues when an error is found on the master and such error
is set to be skipped.

While printing the Max keyfile length 'llstr' call was used which 
was treating the max_key_file_length as negative.

Changing this to ullstr fixes the problem. 
myisamchk output will differ in 32 bit and 64 bit Operating systems 
so its not possible to have test case for this bug.

The conformance checker was not taking into
account, and, making concessions for acceptable
incompatibilites in tables created by
versions earlier than 4.1.

The current patch relaxes the conformance
checker to ignore differences in key_alg
and language for tables created by versions
earlier than 4.1.

      
The test started failing following the push for BUG#41541.
Some of the algorithms access bytes beyond the input data
and this can affect up to one byte less than "word size"
which is BITS_SAVED / 8. 
      
Fixed by adding (BITS_SAVED / 8) -1 bytes to buffer size
(i.e. Memory Segment #2) to avoid accessing un-allocated data.

The patch was originally proposed by Mikael and reviewed by Bar.