FAILED IN DEACTIVATE_DDL_LOG_ENTRY

deallocate_ddl_log_entry() can be called without having
locked LOCK_gdl. It uses a global buffer for reading and
writing entries in the ddl_log, and since it is not protected
by any mutex, two concurrent threads can overwrite the
content in the global buffer, so it can be different from
what was read.
Thread a reads from entry 1 into global
buffer, thread b reads from entry 2 into global buffer,
thread a writes from global buffer into entry 1
-> entry 1 is not the content of entry 2.

This is especially bad for replace entries, which uses
two phases, and does not deactivate the whole entry
after the first phase, but increases the phase instead.

Fixed by using thread local storage (stack) instead of global
storage (global buffer).

Also added buffer and size arguments to
read/write_ddl_log_file_entry.

Also only read/write first bytes in entries in
deactivate_ddl_log_entry.

Also fixed the scenario where it will try to recover from a server
compiled with a different value of IO_SIZE (very uncommon!)

updated patch with set_ddl_log_entry_from_buf
and removed read_ddl_log_entry.

Manually tested, no test case included.

removing .... will re-add using merge. for some reason initial mysql-5.1 version is not connected to mysql-5.5

mysqld_safe script did not heed MySQL specific environment variable
$UMASK, leading to divergent behavior between mysqld and mysqld_safe.

Patch adds an approximation of mysqld's behavior to mysqld_safe,
within the bounds dictated by attempt to have mysqld_safe run on
even the most basic of shells (proper '70s sh, not just bash
with a fancy symlink).

Patch also adds approximation of said behavior to mysqld_multi
(in perl).

(backport)

rb://1334
approved by: Inaam Rana

mysqld_safe script did not heed MySQL specific environment variable
$UMASK, leading to divergent behavior between mysqld and mysqld_safe.

Patch adds an approximation of mysqld's behavior to mysqld_safe,
within the bounds dictated by attempt to have mysqld_safe run on
even the most basic of shells (proper '70s sh, not just bash
with a fancy symlink).

Patch also adds approximation of said behavior to mysqld_multi
(in perl).

(backport)

manual merge

rb://1334
approved by: Inaam Rana

mysqld_safe script did not heed MySQL specific environment variable
$UMASK, leading to divergent behavior between mysqld and mysqld_safe.

Patch adds an approximation of mysqld's behavior to mysqld_safe,
within the bounds dictated by attempt to have mysqld_safe run on
even the most basic of shells (proper '70s sh, not just bash
with a fancy symlink).

Patch also adds approximation of said behavior to mysqld_multi
(in perl).

Problem:-
using last_insert_id() on an auto_incremented bigint unsigned does
not work for values which are greater than max-bigint-signed.

Analysis:-
last_insert_id() returns the first auto_incremented value for a column
and an auto_incremented value can have only positive values.

In our code, when we are initializing a last_insert_id object, we are
taking it as a signed BIGINT, So when the auto_incremented value reaches
greater than max signed bigint, last_insert_id gives negative result.

Solution:
When we are fetching the value from last_insert_id, We are setting the 
unsigned_flag, so that it take only unsigned BIGINT value.

Problem:-
using last_insert_id() on an auto_incremented bigint unsigned does
not work for values which are greater than max-bigint-signed.

Analysis:-
last_insert_id() returns the first auto_incremented value for a column
and an auto_incremented value can have only positive values.

In our code, when we are initializing a last_insert_id object, we are
taking it as a signed BIGINT, So when the auto_incremented value reaches
greater than max signed bigint, last_insert_id gives negative result.

Solution:
When we are fetching the value from last_insert_id, We are setting the 
unsigned_flag, so that it take only unsigned BIGINT value.

No commit message

REAL DUPLICATE VALUE FOR PREFIX KEYS

innobase_rec_to_mysql(): Invoke dict_index_get_nth_col_or_prefix_pos()
instead of dict_index_get_nth_col_pos() to find the column.

removed warning message as they have changed in mysql-5.6 and mysql-trunk and this is left over from changes that got up-merged 

bug#14704286
SECONDARY INDEX UPDATES MAKE CONSISTENT READS DO O(N^2) UNDO PAGE
LOOKUPS (honoring kill query while accessing sec_index)

If secondary index is being used for select query evaluation and this
query is operating with consistent read snapshot it might take good time for
secondary index to return back control to mysql as MVCC would kick in.

If user issues "kill query <id>" while query is actively accessing
secondary index it will not be honored as there is no hook to check
for this condition. Added hook for this check.

-----
Parallely secondary index taking too long to evaluate for consistent
read snapshot case is being examined for performance improvement. WL#6540.

bug#14704286
SECONDARY INDEX UPDATES MAKE CONSISTENT READS DO O(N^2) UNDO PAGE
LOOKUPS (honoring kill query while accessing sec_index)

If secondary index is being used for select query evaluation and this
query is operating with consistent read snapshot it might take good time for
secondary index to return back control to mysql as MVCC would kick in.

If user issues "kill query <id>" while query is actively accessing
secondary index it will not be honored as there is no hook to check
for this condition. Added hook for this check.

-----
Parallely secondary index taking too long to evaluate for consistent
read snapshot case is being examined for performance improvement. WL#6540.

This fix resolves a security vulnerability of SHOW PROFILE.

See the bug report for details.

exist in 5.5).

os/os0file.c:1332: error: ISO C90 forbids mixed declarations and code

although the bug does not exist in 5.1/innodb.

The problem is in the error handling in row_create_table_for_mysql().
In the 'disk full' case we may forget to call dict_mem_table_free() on
the table object.

Approved by:	Marko (rb:1377 and rb:1386)

               PRIVILEGES

Description: (user,host) pair from security context is used
             privilege checking at the time of granting or
             revoking proxy privileges. This creates problem
             when server is started with
             --skip-name-resolve option because host will not
             contain any value. Checks should be dependent on
             consistent values regardless the way server is
             started. Further, privilege check should use
             (priv_user,priv_host) pair rather than values
             obtained from inbound connection because
             this pair represents the correct account context
             obtained from mysql.user table.

               FAILS TO READ EVENT TABLE AT STARTUP.

This issue is fixed in 5.5+ versions. This patch adds a test
case for this scenario.

CONSISTENT SNAPSHOT OPTION

A transaction is started with a consistent snapshot.  After 
the transaction is started new indexes are added to the 
table.  Now when we issue an update statement, the optimizer
chooses an index.  When the index scan is being initialized
via ha_innobase::change_active_index(), InnoDB reports 
the error code HA_ERR_TABLE_DEF_CHANGED, with message 
stating that "insufficient history for index".

This error message is propagated up to the SQL layer.  But
the my_error() api is never called.  The statement level
diagnostics area is not updated with the correct error 
status (it remains in Diagnostics_area::DA_EMPTY).  

Hence the following check in the Protocol::end_statement()
fails.

 516   case Diagnostics_area::DA_EMPTY:
 517   default:
 518     DBUG_ASSERT(0);
 519     error= send_ok(thd->server_status, 0, 0, 0, NULL);
 520     break;

The fix is to backport the fix of bugs 14365043, 11761652 
and 11746399. 

14365043 PROTOCOL::END_STATEMENT(): ASSERTION `0' FAILED
11761652 HA_RND_INIT() RESULT CODE NOT CHECKED
11746399 RETURN VALUES OF HA_INDEX_INIT() AND INDEX_INIT() IGNORED

rb://1227 approved by guilhem and mattiasj.

Also, add debug check for trx_id sanity to row_upd_rec_sys_fields().

We did not allocate enough bits for index->trx_id_offset, causing an
UPDATE or DELETE of a table with a PRIMARY KEY longer than 1024 bytes
to corrupt the PRIMARY KEY.

dict_index_t: Allocate enough bits.

dict_index_build_internal_clust(): Check for overflow of
index->trx_id_offset. Trip a debug assertion when overflow occurs.

rb:1380 approved by Jimmy Yang

When a SP handler is activated, memory is allocated to hold the
MESSAGE_TEXT for the condition that caused the activation.

The problem was that this memory was allocated on the MEM_ROOT belonging
to the stored program. Since this MEM_ROOT is not freed until the
stored program ends, a stored program that causes lots of handler
activations can start using lots of memory. In 5.1 and earlier the
problem did not exist as no MESSAGE_TEXT was allocated if a condition
was raised with a handler present. However, this behavior lead to
a number of other issues such as Bug#23032.

This patch fixes the problem by allocating enough memory for the
necessary MESSAGE_TEXTs in the SP MEM_ROOT when the SP starts and
then re-using this memory each time a handler is activated.
      
This is the 5.5 version of the patch.

This bug depends on cmake version.

For cmake 2.6 (which is still in use for some pushbuild trees)
the main build would succeed, even if create_initial_db failed.

The problem was the chaining of commands in the CUSTOM_COMMAND
to produce 'initdb.dep'. It first invokes cmake to run mysqld,
then invokes 'touch' to create the file. Moving the 'touch'
command makes the error propagate properly for both cmake 2.6 and 2.8

Follow-up patch - Fix broken build:
error: format ‘%u’ expects argument of type ‘unsigned int’,
but argument 2 has type ‘key_part_map {aka long unsigned int}’
[-Werror=format]

n_child_sum_items kept increasing.
Since it is used for calculating the size of ref_pointer_array,
we will allocate larger and larger chunks of memory, until we hit some
operating system limit.
The memory is free()d at disconnect, but is most likely *not*
returned to the operating system.

TRANSACTION ROLLBACK

Description:  During the rollback operation, a blob page 
is removed earlier than desired.  Consider following scenario:

1. create table t1(a int primary key,b blob) engine=innodb;
2. insert into t1 values (1,repeat('b',9000));
3. begin;
4. update t1 set b=concat(b,'b');
5. update t1 set a=a+1;
6. insert into t1 values (1,repeat('b',9000));
7. rollback;

The update operation in line 5 produces 2 undo log record. The first
undo record (TRX_UNDO_DEL_MARK_REC) goes to trx->update_undo and the
second undo record (TRX_UNDO_INSERT_REC) goes to trx->insert_undo.
During rollback, they are executed out of order.

When the undo record TRX_UNDO_DEL_MARK_REC is applied/executed,
the blob ownership is also reset.  Because of this the blob page
is released earlier than desired.  This blob page must have been
freed only as part of applying/executing the undo record
TRX_UNDO_INSERT_REC.

This problem can be avoided by executing the undo records in
order.  This patch will make innodb to execute the undo records
in order.

rb://1125 approved by Marko.

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