Restrict when user table hashes can be viewed. Require SUPER privileges.

Description:- There is a possibility of negative array index
write associated with the function "terminal_writec()". This
is due to the assumption that there is a possibility of
getting -1 return value from the function call
"ct_visual_char()".

Analysis:- The function "terminal_writec()" is called only
from "em_delete_or_list()" and "vi_list_or_eof()" and both
these functions deal with the "^D" (ctrl+D) signal. So the
"size_t len" and "Char c" passed to "ct_visual_char()" (when
called from "terminal_writec()") is always 8 (macro
VISUAL_WIDTH_MAX is passed whose value is 8) and 4 (ASCII
value for "^D"/"ctrl+D") respectively.
Since the value of "c" is 4, "ct_chr_class()" returns -1
(macro CHTYPE_ASCIICTL is associated with -1 value). And
since value of "len" is 8, "ct_visual_char()" will always
return 2 when it is called from "terminal_writec()".
So there is no possible case so that we encounter a negative
array index write in "terminal_writec()". But since there is
a rare posibility of using "terminal_writec()" in future
enhancements, it is good handle the error case as well.

Fix:- A condition is added in "terminal_writec()" to check
whether "ct_visual_char()" is returning -1 or not. If the
return value is -1, then value 0 is returned to its calling
function "em_delete_or_list()" or "vi_list_or_eof()", which
in turn will return CC_ERROR.

NOTE:- No testcase is added since currently there is no
possible scenario to encounter this error case.

post push change: fixing valgrind failures

post push change: missed the change in mysql-5.5
(Fixing compiler warning/error)

Description:
Can't build mysql-5.5 latest source with openssl 0.9.8e.

Analysis:
Older OpenSSL versions(prior to openssl 1.0) doesn't have 'SSL_OP_NO_COMPRESSION' defined.
Hence the build is failing with SSL_OP_NO_COMPRESSION undeclared.

Fix:
Added a conditonal compilation for 'SSL_OP_NO_COMPRESSION'.
i.e if 'SSL_OP_NO_COMPRESSION' is defined then have the SSL_set_options call for OpenSSL 1.0 versions.
Have sk_SSL_COMP_zero() call for OpenSSL 0.9.8 version

One can not see in PB2 test logs which unit tests have been run
and passed.

This patchs adds an option --unit-tests-report to mtr which
include the ctest report in mtr output.  It will also turn on unit
testing if not explicitly turned off with --no-unit-tests or
equivalent.

In manual runs one can always look in the ctest.log file in mtr
vardir.

--unit-tests are replaced with --unit-tests-report in files under
mysql-test/collections/ to activate report in PB2.

Fix typo: s/COPY_ONLY/COPYONLY/g

(cherry picked from commit 034046b4dfe3e6f83e0cf73310884334e0507f06)

Conflicts:
	cmake/make_dist.cmake.in

               MYISAM TABLE CAUSES THE SERVER TO CRASH

Backport to mysql-5.1

Embedded server does not support restarting and needs to skip the test.

if XA PREPARE transactions hold explicit locks.

innobase_shutdown_for_mysql(): Call trx_sys_close() before lock_sys_close()
(and dict_close()) so that trx_free_prepared() will see all locks intact.

RB: 8561
Reviewed-by: Vasil Dimov <vasil.dimov@oracle.com>

FILL_VARIABLES

Prevent mutexes used in SHOW VARIABLES from being locked twice.

Posty push fix for test case

Backporting the patch to 5.1 and 5.5

PROBLEM

Create time is calculated as last status change time of .frm file.
The first problem was that innodb was passing file name as
"table_name#po#p0.frm" to the stat() call which calculates the create time.
Since there is no frm file with this name create_time will be stored as NULL.
The second problem is ha_partition::info() updates stats for create time
when HA_STATUS_CONST flag was set ,where as innodb calculates this statistic
when HA_STATUS_TIME is set,which causes create_time to be set as NULL.

Fix
Pass proper .frm name to stat() call and calculate create time when
HA_STATUS_CONST flag is set.

Description: SSL tests are failing in mysql-5.1 pb2

Analysis: The SSL certificates are ended by jan 2015.
Hence the SSL tests are failing.

Fix: We have generated new certificates with SHA1 algorithm.

Backport from mysql-5.5 to mysql-5.1

Bug# 19699237: UNINITIALIZED VARIABLE IN
               ITEM_FIELD::STR_RESULT LEADS TO INCORRECT
               BEHAVIOR

ISSUE:
------
When the following conditions are satisfied in a query, a
server crash occurs:
a) Two rows are compared using a NULL-safe equal-to operator.
b) Each of these rows belong to different charsets.

SOLUTION:
---------
When one charset is converted to another for comparision,
the constructor of "Item_func_conv_charset" is called.
This will attempt to use the Item_cache if the string is a
constant. This check succeeds because the "used_table_map"
of the Item_cache class is never set to the correct value.
Since it is mistakenly assumed to be a constant, it tries
to fetch the relevant null value related fields which are
yet to be initialized. This results in valgrind issues
and wrong results.

The fix is to update the "used_table_map" of "Item_cache".
This will allow "Item_func_conv_charset" to realise that
this is not a constant.

Problem: UDF doesn't handle the arguments properly when they
         are of string type due to a misplaced break.
         The length of arguments is also not set properly
         when the argument is NULL.

Solution: Fixed the code by putting the break at right place
          and setting the argument length to zero when the
          argument is NULL.

- Updated emdedded to embedded

			TO USE A SECOND WATCH PAGE PER INSTANCE

Description:
	BUF_POOL_WATCH_SIZE is also initialized to number of purge threads.
so BUF_POOL_WATCH_SIZE will never be lesser than number of purge threads.
From the code, there is no scope for purge thread to skip buf_pool_watch_unset.
So there can be at most one buffer pool watch active per purge thread.
In other words, there is no chance for purge thread instance to hold a watch
when setting another watch.

Solution:
	Adding code comments to clarify the issue.
Reviewed-by: Marko Mäkelä <marko.makela@oracle.com>
Approved via Bug page.

Backport from mysql-5.5 to mysql-5.1

Bug#19880368 : GROUP_CONCAT CRASHES AFTER DUMP_LEAF_KEY

Problem:
find_order_by_list does not update the address of order_item
correctly after resolving.

Solution:
Change the ref_by address for a order_by field if its
SUM_FUNC_ITEM to the address of the field present in
all_fields.

Backport from mysql-5.5 to mysql-5.1

Bug #19612819 :  FILESORT: ASSERTION FAILED: POS->FIELD != 0 || POS->ITEM != 0

Problem:
While getting the temp table field for a REF_ITEM
make_sortorder is using the real_item. As a result
server fails later with an assert.

Solution:
Do not use real_item to get the temp table field.
Instead use the REF_ITEM itself as temp table fields
are created for REF_ITEM not the real_item.

               MYISAM TABLE CAUSES THE SERVER TO CRASH

Issue:
-----
During index maintanence, R-tree node might need a split.
In some cases the square of mbr could be calculated to
infinite (as in this case) or to NaN. This is currently
not handled. This is specific to MyISAM.

SOLUTION:
---------
If the calculated value in "mbr_join_square" is infinite or
NaN, set it to max double value.

Initialization of output parameters of "pick_seeds" is
required if calculation is infinite (or negative infinite).

Similar to the fix made for INNODB as part of Bug#19533996.

Conflicts:
	mysql-test/suite/sys_vars/r/transaction_alloc_block_size_basic.result
	mysql-test/suite/sys_vars/r/transaction_prealloc_size_basic.result
	mysql-test/suite/sys_vars/t/transaction_alloc_block_size_basic.test
	mysql-test/suite/sys_vars/t/transaction_prealloc_size_basic.test
	sql/mysqld.cc

Backport from mysql-5.5 to mysql-5.1 of:

Bug19770858: MYSQLD CAN BE DRIVEN TO OOM WITH TWO SIMPLE SESSION VARS

The problem was that the maximum value of the transaction_prealloc_size
session system variable was ULONG_MAX which meant that it was possible
to cause the server to allocate excessive amounts of memory.

This patch fixes the problem by reducing the maxmimum value of
transaction_prealloc_size and transaction_alloc_block_size down
to 128K.

Note that transactions will still be able to allocate more than
128K if needed, this patch just reduces the amount that can be
preallocated - as well as the maximum size of the incremental
allocation blocks.

(cherry picked from commit 540c9f7ebb428bbf9ec028feabe1f7f919fdefd9)

Conflicts:
	mysql-test/suite/sys_vars/r/transaction_alloc_block_size_basic.result
	mysql-test/suite/sys_vars/r/transaction_alloc_block_size_basic_64.result
	mysql-test/suite/sys_vars/t/disabled.def
	mysql-test/suite/sys_vars/t/transaction_alloc_block_size_basic.test
	sql/sys_vars.cc

BINLOGGED INCORRECTLY - BREAKS A SLAVE

Submitted a incomplete patch with my previous push,
re submitting the extra changes the required to make
the patch complete.

Analysis:
In row based replication, Master does not send temp table information
to Slave. If there are any DDLs that involves in regular table that needs
to be sent to Slave and a temp tables (which will not be available at Slave),
the Master rewrites the query replacing temp table with it's defintion.
Eg: create table regular_table like temptable.
In rewrite logic, server is ignoring the database of regular table
which can cause problems mentioned in this bug.

Fix: dont ignore database information (if available) while
rewriting the query

This reverts commit c7de768ec20f5167cff2c69a255d95ca2eded46a.

			RESERVATION AND SIGNAL COUNT

Problem:
	Reservation and Signal count value shows negative value for show engine
innodb statement.

Solution:
	This is happening due to counter overflow error. Reservation and Signal
count values are defined as unsigned long but these variables are converted to
long while printing it. Change Reservation and Signal count values as unsigned
long datatype while printing it.
Reviewed-by: Marko Mäkelä <marko.makela@oracle.com>
Approved in bug page.