in write_changed_bitmap(), and page cache forbids that. Here we make the page
cache more relaxed. Original patch by Sanja, simplified by me as limited to
not-locked. See comment of ma_bitmap.c.
With that, maria_stress.yy runs until hitting BUG 39665.

storage/maria/ma_bitmap.c:
  A thread which unpins bitmap pages in _ma_bitmap_unpin_all() sometimes
  hit an assertion in the page cache (info!=0 in remove_pin()) which states
  that you can unpin/unlock only what *you* have pinned/locked.
  Fixed by setting the new last parameter of pagecache_unlock_by_link()
  to TRUE in _ma_bitmap_unpin_all().
storage/maria/ma_blockrec.c:
  new prototype and splitting assertion in three (3rd one fires: BUG 39665)
storage/maria/ma_check.c:
  new prototype
storage/maria/ma_key_recover.c:
  new prototype
storage/maria/ma_loghandler.c:
  new prototype
storage/maria/ma_pagecache.c:
  Allow a thread to unpin, with pagecache_unlock_by_link(), a non-locked page pinned by others.
  This is a hack for _ma_bitmap_unpin_all() which needs to unpin pages which were
  pinned by other threads in write_changed_bitmap().
storage/maria/ma_pagecache.h:
  new prototype
storage/maria/ma_preload.c:
  new prototype
storage/maria/unittest/ma_pagecache_rwconsist.c:
  new prototype
storage/maria/unittest/ma_pagecache_single.c:
  new prototype

already supports pin-without-lock so implementation of this WL is instant and
done here. This could improve concurrency. No testcase, this requires
multiple threads and is automatically tested at push time by maria_stress.yy (pushbuild2).

storage/maria/ma_bitmap.c:
  As the page cache supports pinning without write-locking, we don't take write lock
  in write_changed_bitmap(), only a pin; this could improve concurrency (WL#4595).

which nobody woke up (see comment of ma_bitmap.c). No testcase, this requires
multiple threads and is automatically tested at push time by maria_stress.yy (pushbuild2).

storage/maria/ma_bitmap.c:
  * _ma_bitmap_wait_or_flush() didn't publish that it was waiting for bitmap to not
  be over-allocated (i.e. didn't modify bitmap->flush_all_requested) so nobody
  (_ma_bitmap_flushable(), _ma_bitmap_release_unused()) knew it had to wake it up
  => it stalled (BUG#39210). In fact the wait in _ma_bitmap_wait_or_flush()
  is not needed, it's ok if this function sends the over-allocated bitmap to page
  cache and keeps pin on it (_ma_bitmap_unpin_all() will unpin it later, and
  the one who added _ma_bitmap_wait_or_flush() didn't know it). Function
  is thus deleted, as _ma_bitmap_flush() can do its job.
  * After fixing that, test runs longer and BUG 39665 happens, which looks like
  a separate page cache bug.
  * Smaller changes: _ma_bitmap_flush_all() called write_changed_bitmap() even
  though it might not be changed; added some DBUG calls in functions; split
  assertions.
  * In _ma_bitmap_release_unused(), it's more logical to test non_flushable_state
  than now_transactional to know if we have to decrement non_flushable
  (it's exactly per the definition of non_flushable_state).
storage/maria/ma_blockrec.c:
  _ma_bitmap_wait_or_flush() is not needed.
  ******
  new prototype and splitting assertion in three (3rd one fires: BUG 39665)
storage/maria/ma_blockrec.h:
  _ma_bitmap_wait_or_flush() is not needed.

- The problem was that we didn't inform the handler that we are going to close tables that are locked and may have (at least in Maria) be part of an active transaction.
Fix for Bug#39227 Maria: crash with ALTER TABLE PARTITION
Fix for Bug #39987 main.partition_not_windows fails under debug build
Fixed some compiler errors & warnings found by pushbuild

include/my_base.h:
  Added HA_EXTRA_PREPARE_FOR_FORCED_CLOSE for signaling the handler that the file will be forced closed
include/my_global.h:
  Removed 'register' from 'swap_variables' as this gives a warnings when the variables are structs. Compilers should also now be smart enough to figure out this themselves
mysql-test/r/subselect_debug.result:
  Reset value of the debug variable;  Without setting this the subselect_innodb test will fail when run after this one
mysql-test/suite/maria/r/maria.result:
  Merged test with myisam.test
  Added tests for new fixed bugs
mysql-test/suite/maria/t/maria.test:
  Merged test with myisam.test
  Added tests for new fixed bugs
mysql-test/t/subselect_debug.test:
  Reset value of the debug variable;  Without setting this the subselect_innodb test will fail when run after this one
mysys/my_uuid.c:
  Fixed compiler error on windows
sql/ha_partition.cc:
  Added support for the new extra flag: HA_EXTRA_PREPARE_FOR_FORCED_CLOSE (Bug #39226)
  Ensure that we call extra() for HA_EXTRA_PREPARE_FOR_DROP (Bug#39227)
sql/mysqld.cc:
  Fix for Bug #39987 main.partition_not_windows fails under debug build
  The problem was that when compiling for purify/valgrind realpath() is not used, which causes test_if_data_home_dir to fail when it shouldn't
sql/sql_base.cc:
  Call HA_EXTRA_PREPARE_FOR_FORCED_CLOSE for tables that are locked but we are going to force close without doing a commit
sql/sql_parse.cc:
  More DBUG_PRINT. Fixed comments
storage/maria/ma_extra.c:
  If HA_EXTRA_PREPARE_FOR_FORCED_CLOSE is called and the table is part of a transaction, remove the table from beeing part of a transaction.
  This is safe as this is only used as part of flush tables or when the table is not part of a transaction
storage/myisam/mi_open.c:
  Indentation fix
unittest/mysys/waiting_threads-t.c:
  Remove not needed 'volatile' to get rid of compiler warnings on windows

It was a forgotten rw_unlock(), due to the deadlock detector feature (so bug was only in 5.1-maria, not
6.0-maria).

mysql-test/suite/maria/r/maria3.result:
  result, all fine
mysql-test/suite/maria/t/maria3.test:
  Test of BUG#39697: two scenarios (transactional tables, and non-transactional table but dynamic row format so still taking the rwlock) where the hang happened.
  t2 added by this test was masked by a temporary table created earlier in the test, which we forgot to drop.
storage/maria/ha_maria.cc:
  use new macro
storage/maria/ma_blockrec.c:
  use new macro
storage/maria/ma_commit.c:
  use new macro
storage/maria/ma_init.c:
  putting address of dummy_transaction_object in --debug trace can be useful
storage/maria/ma_open.c:
  use new macro
storage/maria/ma_write.c:
  if local_lock_tree is true, we have acquired keyinfo->root_lock so need to release it before "goto err".
  A pair of assertions so that our usage of TrIDs is kept sensible.
storage/maria/maria_def.h:
  A macro so that changes of MARIA_HA::trn can be tracked with --debug. It helped to understand in what cases,
  in maria_write(), we could have !(info->dup_key_trid == info->trn->trid) && !share->now_transactional
  (answer: ALTER TABLE adding UNIQUE index on transactional table).

mysys/lf_alloc-pin.c:
  workaround for gcc 4.1.0 strict-aliasing bug.
  and yes, I mean a *bug* - as union (in alloc_free) is a
  documented way to access type-punned pointers. and it helps in
  newer gcc, but fails in 4.1.0

automake *must* know all sources in advance, listing a file in EXTRA_DIST
doesn't make it a source, which breakes dependency tracking
(.Po files aren't included)

mysql-test/mysql-test-run.pl:
  The maria suite made default for execution.
mysql-test/suite/maria:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-autozerofill.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-big.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-big2.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-connect.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-gis-rtree-dynamic.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-gis-rtree-trans.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-gis-rtree.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-mvcc.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-no-logging.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-page-checksum.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-preload.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-purge.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-recover.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-recovery-big.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-recovery-bitmap.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-recovery-rtree-ft.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-recovery.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria-recovery2.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria2.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria3.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/maria_notembedded.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/r/ps_maria.result:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-autozerofill.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-big.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-big2.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-connect.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-gis-rtree-dynamic.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-gis-rtree-trans.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-gis-rtree.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-mvcc.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-no-logging.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-page-checksum.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-preload.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-purge.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recover-master.opt:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recover.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery-big-master.opt:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery-big.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery-bitmap-master.opt:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery-bitmap.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery-master.opt:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery-rtree-ft-master.opt:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery-rtree-ft.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery2-master.opt:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria-recovery2.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria2.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria3.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/maria_notembedded.test:
  Maria tests moved to separate suite.
mysql-test/suite/maria/t/ps_maria.test:
  Maria tests moved to separate suite.

mysql-test/r/maria.result:
  Test suite of BUG#39399.
mysql-test/t/maria.test:
  Test suite of BUG#39399.
storage/maria/ha_maria.cc:
  Comparison of tables during altering fixed. (BUG#39399)
  Unused function parameter removed.

The bug was that prepared statements didn't downgrade TL_WRITE_CONCURRENT properly

mysql-test/r/maria.result:
  Added test case
mysql-test/t/maria.test:
  Added test case
sql/mysql_priv.h:
  Make upgrade_lock_type() global
sql/sql_base.cc:
  Fixed indentation
sql/sql_insert.cc:
  Make upgrade_lock_type() global
sql/sql_prepare.cc:
  Call upgrade_lock_type_for_insert() to get right lock to use
sql/sql_view.cc:
  Indentation fix

Symptom was that records_in_range() found 0 matching keys which confused the optimizer to belive that there was no matching rows for the query

mysql-test/r/maria.result:
  New testcase
mysql-test/t/maria.test:
  New testcase
storage/maria/ma_search.c:
  Fix bug in skip_key for keys that starts with a CHAR/VARCHAR NULL key.

increase the default value of deadlock_timeout_long

mysql-test/r/maria.result:
  no longer necessary
mysql-test/t/maria.test:
  no longer necessary

Problem: <=> operator may return wrong results 
comparing NULL and a DATE/DATETIME/TIME value.

Fix: properly check NULLs.


mysql-test/r/type_datetime.result:
  Fix for bug#37526: asymertic operator <=> in trigger
    - test result.
mysql-test/t/type_datetime.test:
  Fix for bug#37526: asymertic operator <=> in trigger
    - test case.
sql/item_cmpfunc.cc:
  Fix for bug#37526: asymertic operator <=> in trigger
    - if is_nulls_eq is TRUE Arg_comparator::compare_datetime() 
  should return 1 only if both arguments are NULL.

statement/stored procedure

View privileges are properly checked after the fix for bug no 
36086, so the method TABLE_LIST::get_db_name() must be used 
instead of field TABLE_LIST::db, as this only works for tables.
Bug appears when accessing views in prepared statements.

mysql-test/r/view_grant.result:
  Bug#35600: Extended existing test case.
mysql-test/t/view_grant.test:
  Bug#35600: Extended existing test result.
sql/sql_parse.cc:
  Bug#35600: Using method to retrieve database name instead of
  field.

SUPER is not required to change binlog format for session

A user without SUPER privileges can change the value of the
session variable BINLOG_FORMAT, causing problems for a DBA.

This changeset requires a user to have SUPER privileges to
change the value of the session variable BINLOG_FORMAT, and
not only the global variable BINLOG_FORMAT.


mysql-test/suite/binlog/t/binlog_grant.test:
  Adding test to test grants needed for SQL_LOG_BIN and BINLOG_FORMAT.
sql/set_var.cc:
  Adding code to check that user has SUPER permission
  needed to change the value of BINLOG_FORMAT.
sql/set_var.h:
  Adding function sys_var_thd_binlog_format::check()

SET col
                  
When reporting a duplicate key error the server was making incorrect assumptions 
on what the state of the value string to include in the error is.

Fixed by accessing the data in this string in a "safe" way (without relying on it
having a terminating 0).
      
Detected by code analysis and fixed a similar problem in reporting the foreign key
duplicate errors.

mysql-test/r/type_set.result:
  Bug #38701: test case
mysql-test/t/type_set.test:
  Bug #38701: test case
sql/handler.cc:
  Bug #38701: don't rely on the presence of a terminating 0 in the string

configure.in:
  change server version number to 5.1.29

Added a rule that uses gcc to generate preprocessor
output (gcc -E) that can be compared to an already
generated output using the diff utility.

icheck has been removed and replaced by gcc -E
because icheck does not support C++.

Makefile.am:
  Added a rule for checking that the abi/api
  has not changed.
  
  The following rules are followed in the rule in makefile.am
  
  1) Generate preprocessor output for the
     files that need to be tested for abi/ 
     api changes. use -nostdinc to prevent
     generation of preprocessor output for
     system headers. This results in
     messages in stderr saying that these
     headers were not found. Redirect the
     stderr output to /dev/null to prevent
     seeing these messages.
  2) sed the output to 
     2.1) remove blank lines and lines that
          begin with "# "
     2.2) When gcc -E is run on the Mac OS 
          and solaris sparc platforms it
          introduces a line of output that
          shows up as a difference between
          the .pp and .out files. Remove
          these OS specific preprocessor
          text inserted by the preprocessor.
  3) diff the generated file and the canons
     (.pp files already in the repository).
  4) delete the .out file that is generated.
     If the diff fails, the generated file 
     is not removed. This will be useful
     for analysis of ABI differences (e.g.
     using a visual diff tool).
  
  A ABI change that causes a build to fail will always be accompanied by new canons (.out files). The .out files that are not removed will be replaced as the new .pp files.
  
  e.g. If include/mysql/plugin.h has an ABI
       change then this rule would leave a
       <build directory>/abi_check.out file.
  
  A developer with a justified API change will then do a 
  
  mv <build directory>/abi_check.out include/mysql/plugin.pp 
  
  to replace the old canons with the new ones.
configure.in:
  1) Removed the part of the file that was
     icheck related
  2) Added an entry for the configure
     variable DIFF
  3) Ensured that the abi_check rule is run
     only if gcc is available
include/Makefile.am:
  1) Removed the icheck related entries
include/mysql.h.pp:
  The pre-processor output cannon file for
  include/mysql.h
include/mysql/plugin.h.pp:
  The pre-processor output cannon file
  for include/mysql/plugin.h
include/mysql_h.ic:
  Removed the cannon file related to icheck.
sql/mysql_priv.h.pp:
  The pre-processor output cannon file for
  sql/mysql_priv.h

storage/maria/ma_delete.c:
  Remove wrong optimization (first_key is not related to keypos value at this point)
storage/maria/maria_chk.c:
  Added printing of forgotten option

      
The check_table_access function initializes per-table grant info and performs
access rights check. It wasn't called for SHOW STATUS statement thus left
grants info uninitialized. In some cases this led to server crash. In other
cases it allowed a user to check for presence/absence of arbitrary values in
any tables.
      
Now the check_table_access function is called prior to the statement
processing.


mysql-test/r/status.result:
  Added a test case for the bug#37908.
mysql-test/t/status.test:
  Added a test case for the bug#37908.
sql/sql_parse.cc:
  Bug#37908: Skipped access right check caused server crash.
  Now the check_table_access function is called when the SHOW STATUS statement
  uses any table except information.STATUS.
sql/sql_yacc.yy:
  Bug#37908: Skipped access right check caused server crash.
  For the SHOW PROCEDURE/FUNCTION STATUS the 'mysql.proc' table isn't added
  to the table list anymore as there is no need.