INC_HOST_ERRORS() IS CALLED.

Description: Merge from MySQL-5.1 to MySQL-5.5

Null merge from mysql-5.1->mysql-5.5

              INC_HOST_ERRORS() IS CALLED.

Issue       : Sequence of calling inc_host_errors()
              and reset_host_errors() required some
              changes in order to maintain correct
              connection error count.

Solution    : Call to reset_host_errors() is shifted
              to a location after which no calls to
              inc_host_errors() are made.

             CRASHES INNODB | TRX_STATE_NOT_STARTED

The problem was that if DELETE with subselect caused a
deadlock inside InnoDB, this deadlock was not properly
handled by the SQL layer. This meant that the SQL layer
would try to unlock the row after InnoDB had rolled
back the transaction. This caused an assertion inside
InnoDB.

This patch fixes the problem by checking for errors
reported by SQL_SELECT::skip_record() and not calling
unlock_row() if any errors have been reported.

Upmerge from mysql-5.1 -> mysql-5.5

Problem
========
            
Replication breaks in the cases if the event length exceeds 
the size of master Dump thread's max_allowed_packet.
              
The reason why this failure is occuring is because the event length is
more than the total size of the max_allowed_packet, on addition of the  
max_event_header length exceeds the max_allowed_packet of the DUMP thread.
This causes the Dump thread to break replication and throw an error.
                      
That can happen e.g with row-based replication in Update_rows event.
            
Fix
====
          
The problem is fixed in 2 steps:

1.) The Dump thread limit to read event is increased to the upper limit
    i.e. Dump thread reads whatever gets logged in the binary log.

2.) On the slave side we increase the the max_allowed_packet for the
    slave's threads (IO/SQL) by increasing it to 1GB.

    This is done using the new server option (slave_max_allowed_packet)
    included, is used to regulate the max_allowed_packet of the  
    slave thread (IO/SQL) by the DBA, and facilitates the sending of
    large packets from the master to the slave.

    This causes the large packets to be received by the slave and apply
    it successfully.

sql/log_event.cc:
  The max_allowed_packet is not evaluated to the new option 
  slave_max_allowed_packet after the fix.
sql/log_event.h:
  Added the new option in the log_event.h file.
sql/mysqld.cc:
  Added a new option to the server.
sql/slave.cc:
  Increasing the session max_allowed_packet to a large value,
  i.e. not taking global(max_allowed) into consideration, for the slave's threads.
sql/sql_repl.cc:
  The dump thread's max_allowed_packet is set to the upper limit
  which makes it independent and it now reads whatever gets 
  logged in the binary log.

      
Changes in the InnoDB codebase required to compile and
integrate the MEB codebase with MySQL 5.5.

@ storage/innobase/btr/btr0btr.c
  Excluded buffer pool usage from MEB build.
 
  buf_pool_from_bpage calls are in buf0buf.ic, and
  the buffer pool functions from that file are
  disabled in MEB.
@ storage/innobase/buf/buf0buf.c
  Disabling more buffer pool functions unused in MEB.
@ storage/innobase/dict/dict0dict.c
  Disabling dict_ind_free that is unused in MEB.
@ storage/innobase/dict/dict0mem.c
  The include

  #include "ha_prototypes.h"

  Was causing conflicts with definitions in my_global.h

  Linking C executable mysqlbackup
  libinnodb.a(dict0mem.c.o): In function `dict_mem_foreign_table_name_lookup_set':
  dict0mem.c:(.text+0x91c): undefined reference to `innobase_get_lower_case_table_names'
  libinnodb.a(dict0mem.c.o): In function `dict_mem_referenced_table_name_lookup_set':
  dict0mem.c:(.text+0x9fc): undefined reference to `innobase_get_lower_case_table_names'
  libinnodb.a(dict0mem.c.o): In function `dict_mem_foreign_table_name_lookup_set':
  dict0mem.c:(.text+0x96e): undefined reference to `innobase_casedn_str'
  libinnodb.a(dict0mem.c.o): In function `dict_mem_referenced_table_name_lookup_set':
  dict0mem.c:(.text+0xa4e): undefined reference to `innobase_casedn_str'
  collect2: ld returned 1 exit status
  make[2]: *** [mysqlbackup] Error 1

  innobase_get_lower_case_table_names
  innobase_casedn_str
  are functions that are part of ha_innodb.cc that is not part of the build
        
  dict_mem_foreign_table_name_lookup_set
  function is not there in the current codebase, meaning we do not use it in MEB.
@ storage/innobase/fil/fil0fil.c
  The srv_fast_shutdown variable is declared in
  srv0srv.c that is not compiled in the
  mysqlbackup codebase.

  This throws an undeclared error.

  From the Manual
  ---------------

  innodb_fast_shutdown
  --------------------

  The InnoDB shutdown mode. The default value is 1
  as of MySQL 3.23.50, which causes a “fast� shutdown
  (the normal type of shutdown). If the value is 0,
  InnoDB does a full purge and an insert buffer merge
  before a shutdown. These operations can take minutes,
  or even hours in extreme cases. If the value is 1,
  InnoDB skips these operations at shutdown.

  This ideally does not matter from mysqlbackup
  @ storage/innobase/ha/ha0ha.c
  In file included from /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/ha/ha0ha.c:34:0:
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/btr0sea.h:286:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
  make[2]: *** [CMakeFiles/innodb.dir/home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/ha/ha0ha.c.o] Error 1
  make[1]: *** [CMakeFiles/innodb.dir/all] Error 2
  make: *** [all] Error 2

  # include "sync0rw.h" is excluded from hotbackup compilation in dict0dict.h

  This causes extern rw_lock_t*	btr_search_latch_temp; to throw a failure because
  the definition of rw_lock_t is not found.
@ storage/innobase/include/buf0buf.h
  Excluding buffer pool functions that are unused from the
  MEB codebase.
@ storage/innobase/include/buf0buf.ic
  replicated the exclusion of

  #include "buf0flu.h"
  #include "buf0lru.h"
  #include "buf0rea.h"

  by looking at the current codebase in <meb-trunk>/src/innodb
  @ storage/innobase/include/dict0dict.h
  dict_table_x_lock_indexes, dict_table_x_unlock_indexes, dict_table_is_corrupted,
  dict_index_is_corrupted, buf_block_buf_fix_inc_func are unused in MEB and was
  leading to compilation errors and hence excluded.
@ storage/innobase/include/dict0dict.ic
  dict_table_x_lock_indexes, dict_table_x_unlock_indexes, dict_table_is_corrupted,
  dict_index_is_corrupted, buf_block_buf_fix_inc_func are unused in MEB and was
  leading to compilation errors and hence excluded.
@ storage/innobase/include/log0log.h
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/log0log.h: At top level:
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/log0log.h:767:2: error: expected specifier-qualifier-list before Ã¢â  ‚¬Ëœmutex_t’

  mutex_t definitions were excluded as seen from ambient code
  hence excluding definition for log_flush_order_mutex also.
@ storage/innobase/include/os0file.h
  Bug in InnoDB code, create_mode should have been create.
@ storage/innobase/include/srv0srv.h
  In file included from /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/buf/buf0buf.c:50:0:
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/srv0srv.h: At top level:
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/srv0srv.h:120:16: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘srv_use_native_aio’

  srv_use_native_aio - we do not use native aio of the OS anyway from MEB. MEB does not compile
  InnoDB with this option. Hence disabling it.
@ storage/innobase/include/trx0sys.h
  [ 56%] Building C object CMakeFiles/innodb.dir/home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c.o
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c: In function ‘trx_sys_read_file_format_id’:
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c:1499:20: error: ‘TRX_SYS_FILE_FORMAT_TAG_MAGIC_N’   undeclared (first use in this function)
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c:1499:20: note: each undeclared identifier is reported only once for  each function it appears in
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c: At top level:
  /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/buf0buf.h:607:1: warning: ‘buf_block_buf_fix_inc_func’ declared ‘static’ but never defined
  make[2]: *** [CMakeFiles/innodb.dir/home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c.o] Error 1

  unused calls excluded to enable compilation
@ storage/innobase/mem/mem0dbg.c
    excluding #include "ha_prototypes.h" that lead to definitions in ha_innodb.cc
@ storage/innobase/os/os0file.c
    InnoDB not compiled with aio support from MEB anyway. Hence excluding this from
    the compilation.
@ storage/innobase/page/page0zip.c
  page0zip.c:(.text+0x4e9e): undefined reference to `buf_pool_from_block'
  collect2: ld returned 1 exit status

  buf_pool_from_block defined in buf0buf.ic, most of the file is excluded for compilation of MEB
@ storage/innobase/ut/ut0dbg.c
  excluding #include "ha_prototypes.h" since it leads to definitions in ha_innodb.cc
  innobase_basename(file) is defined in ha_innodb.cc. Hence excluding that also.
@ storage/innobase/ut/ut0ut.c
  cal_tm unused from MEB, was leading to earnings, hence disabling for MEB.

Patch for 5.1 and 5.5: fix typo in byte comparison in rr_cmp()

Followup patch: wrong result unless archive storage engine is available.

WHEN KILLING

Suppose there is a query waiting for a lock.  If the user kills
this query, then "Got error -1 when reading table" error message
must not be logged in the server log file.  Since this is a user
requested interruption, no spurious error message must be logged
in the server log.  This patch will remove the error message from
the log.

approved by joh and tatjana

Fixed by backport of:
    ------------------------------------------------------------
    revno: 3402.50.156
    committer: Jon Olav Hauglid <jon.hauglid@oracle.com>
    branch nick: mysql-trunk-test
    timestamp: Wed 2012-02-08 14:10:23 +0100
    message:
      Bug#13417754 ASSERT IN ROW_DROP_DATABASE_FOR_MYSQL DURING DROP SCHEMA
      
      This assert could be triggered if an InnoDB table was being moved
      to a different database using ALTER TABLE ... RENAME, while this
      database concurrently was being dropped by DROP DATABASE.
      
      The reason for the problem was that no metadata lock was taken
      on the target database by ALTER TABLE ... RENAME.
      DROP DATABASE was therefore not blocked and could remove
      the database while ALTER TABLE ... RENAME was executing. This
      could cause the assert in InnoDB to be triggered.
      
      This patch fixes the problem by taking a IX metadata lock on
      the target database before ALTER TABLE ... RENAME starts
      moving a table to a different database.
      
      Note that this problem did not occur with RENAME TABLE which
      already takes the correct metadata locks.
      
      Also note that this patch slightly changes the behavior of
      ALTER TABLE ... RENAME. Before, the statement would abort and
      return an error if a lock on the target table name could not
      be taken immediately. With this patch, ALTER TABLE ... RENAME
      will instead block and wait until the lock can be taken 
      (or until we get a lock timeout). This also means that it is
      possible to get ER_LOCK_DEADLOCK errors in this situation
      since we allow ALTER TABLE ... RENAME to wait and not just
      abort immediately.

No commit message

No commit message

Fixed a build break with compiling without the performance schema,
instrumentation should be protected by HAVE_PSI_INTERFACE

No commit message

MYSQL_BIN_LOG::sync_counter is not initialized on MYSQL_BIN_LOG object
creation.

Added missing sync_counter initialization.

For those who build in-source, we need to change .bzrignore:
s/.empty/dummy.bak/

No commit message

Problem
========
            
Replication breaks in the cases if the event length exceeds 
the size of master Dump thread's max_allowed_packet.
              
The reason why this failure is occuring is because the event length is
more than the total size of the max_allowed_packet, on addition of the  
max_event_header length exceeds the max_allowed_packet of the DUMP thread.
This causes the Dump thread to break replication and throw an error.
                      
That can happen e.g with row-based replication in Update_rows event.
            
Fix
====
          
The problem is fixed in 2 steps:

1.) The Dump thread limit to read event is increased to the upper limit
    i.e. Dump thread reads whatever gets logged in the binary log.

2.) On the slave side we increase the the max_allowed_packet for the
    slave's threads (IO/SQL) by increasing it to 1GB.

    This is done using the new server option (slave_max_allowed_packet)
    included, is used to regulate the max_allowed_packet of the  
    slave thread (IO/SQL) by the DBA, and facilitates the sending of
    large packets from the master to the slave.

    This causes the large packets to be received by the slave and apply
    it successfully.

sql/log_event.cc:
  The max_allowed_packet is not evaluated to the new option 
  slave_max_allowed_packet after the fix.
sql/log_event.h:
  Added the new option in the log_event.h file.
sql/mysqld.cc:
  Added a new option to the server.
sql/slave.cc:
  Increasing the session max_allowed_packet to a large value,
  i.e. not taking global(max_allowed) into consideration, for the slave's threads.
sql/sql_repl.cc:
  The dump thread's max_allowed_packet is set to the upper limit
  which makes it independent and it now reads whatever gets 
  logged in the binary log.

WHEN KILLING

Suppose there is a query waiting for a lock.  If the user kills
this query, then "Got error -1 when reading table" error message
must not be logged in the server log file.  Since this is a user
requested interruption, no spurious error message must be logged
in the server log.  This patch will remove the error message from
the log.

approved by joh and tatjana

Problem: mysqlbinlog exits without any error code in case of
file write error. It is because of the fact that the calls
to Log_event::print() method does not return a value and the
thus any error were being ignored.

Resolution: We resolve this problem by checking for the 
IO_CACHE::error == -1 after every call to Log_event:: print()
and terminating the further execution.

client/mysqlbinlog.cc:
  - handled error conditions during event->print() calls
  - added check for error in end_io_cache()
mysys/my_write.c:
  Added debug code to simulate file write error.
  error returned will be ENOSPC=> error no space on the disk
sql/log_event.cc:
  Added debug code to simulate file write error, by reducing the size of io cache.

Analysis:
-------------
If server is started with limit of MAX_CONNECTIONS and 
MAX_USER_CONNECTIONS then only MAX_USER_CONNECTIONS of any particular
users can be connected to server and total MAX_CONNECTIONS of client can
be connected to server.

Server maintains a counter for total CONNECTIONS and total CONNECTIONS 
from particular user.

Here, MAX_CONNECTIONS of connections are created to server. Out of this
MAX_CONNECTIONS, connections from particular user (say USER1) are
also created. The connections from USER1 is lesser than 
MAX_USER_CONNECTIONS. After that there was one more connection request from
USER1. Since USER1 can still create connections as he havent reached
MAX_USER_CONNECTIONS, server increments counter of CONNECTIONS per user.
As server already has MAX_CONNECTIONS of connections, next check to total
CONNECTION count fails. In this case control is returned WITHOUT 
decrementing the CONNECTIONS per user. So the counter per user CONNECTIONS goes
on incrementing for each attempt until current connections are closed. 
And because of this counter per CONNECTIONS reached MAX_USER_CONNECTIONS. 
So, next connections form USER1 user always returns with MAX_USER_CONNECTION 
limit error, even when total connection to sever are less than MAX_CONNECTIONS.

Fix:
-------------
This issue is occurred because of not handling counters properly in the
server. Changed the code to handle per user connection counters properly.

No commit message

      
Details:
 - Archive storage engine file access were not instrumented and thus
   were not shown in PS tables.
      
Fix:
 - Added instrumentation code by using PS Apis for I/O.

rb://1088
approved by: Marko Makela

This bug was introduced in early stages of plugin. We were not
checking for an implicit lock on sec index rec for trx_id that is
stamped on current version of the clust_index in case where the
clust_index has a previous delete marked version.

IN THE ERROR LOG
      
Problem:
Using mysqlbinlog with the --read-from-remote-server option as shown below
prints a message in error log for each call. This happens for 5.5 and above
versions
      
mysqlbinlog -uroot -p --read-from-remote-server --host=localhost test
      
Message in error log file is given below:
120312 10:27:57 [Note] Start binlog_dump to slave_server(0), pos(test, 4)
      
The problem is that it can fill up the error log if the command is called
very often.
      
Analysis:
The below mentioned print function is called from "mysql_binlog_send" function
which causes the "Start binlog_dump..." string to be printed in error log file.

sql_print_information("Start binlog_dump to master_thread_id(%lu) 
slave_server(%d)..."
      
Fix:
A condition has been added in such a way that the 'sql_print_information' 
will be invoked only when the "log_warnings" variable is set to >1 
otherwise don't call the 'sql_print_information' function.

Print deprecation warning if the --safe-mode command line option is
used.

so that investigating test failures is easier.

Detect cases when @before_count / @after_count is NULL.