- This is a regression of MDEV-21174(56f6dab1).
InnoDB resets the BTR_EXTERN_LEN value at wrong offset.

galera_ipv6_mariabackup MTR tests

The galera.galera_parallel_autoinc_manytrx mtr test opens and runs test
scenario through 3 connections to node 1 and one connection to node 2.
In the test initialization phase, the test creates two tables 't1' and 'ten'
and then creates a stored procedure 'p1' to operate on these tables.
These 3 create DDL statements are issued through same connection to node 1.

In the next test phase, the mtr script uses send command to launch the call
for the p1 stored procedure through all 3 connections to node 1 and through
one connection to node 2. As the mtr send command is asynchronous,
this test phase is non blocking and fast operation.
Now, if the replication between nodes is slow, it may happen that the
initialization phase DDL statements have not been received or have not been
fully applied in node 2. Therefore there is no guarantee that the test tables
and the stored procedure have been created in node 2. Yet, the test is trying
to call p1 in node 2.

In the failure case error logs, there is error message
"MTR failed: query 'reap' failed: 1305: PROCEDURE test.p1 does not exist"

The reap command through connection to node 2, is the first place where test
execution may observe that test tables and/or stored procedure are not yet
created in node 2.

The fix in this commit adds a wait condition in connection to node 2, to wait
until the stored procedure is created before calling the stored procedure.
The wait is implemented by looking in information_schema.routines for the p1
stored procedure.

MDEV-22125 : galera.galera_drop_multi MTR failed: InnoDB: MySQL is trying to drop database `fts`.`` though there are still open handles

MDEV-22140 galera.galera_drop_database MTR failed: InnoDB: MySQL is trying to drop database `fts`.`` though there are still open handles

Add wait conditions to wait that all operations are done in both
nodes.

MEM_GET_VBITS(): Save information about uninitialized data.

MEM_SET_VBITS(): Restore information about uninitialized data.

Make ut_new_get_key_by_file event less expensive
remove binary search, compute auto_event_keys offset at compile time.

Replace all references to /usr/sbin/mysqld (and bin and libexec) with
mariadbd, so that the binary server will always be 'mariadbd'.

Also update all places that reference the server binary in other ways,
such as AppArmor profiles and scripts that previously expected to find
a 'mysqld' in process lists.

Item_field::is_json_value() implemented.

Warning message and function result fixed

MDEV-22881 Unexpected errors, corrupt output, Valgrind / ASAN errors in Item_ident::print or append_identifier

After this code

end_inplace:

  if (thd->locked_tables_list.reopen_tables(thd, false))
    goto err_with_mdl_after_alter;

table is not reopened (need_reopen is false) but
some_table_marked_for_reopen is reset to false.

Item_field is allocated on table lock and assigned new name on first
ALTER which is then freed at the end of the command. Second ALTER
accessess this Item_field and gets garbage value.

Make sure to replace the datadir absolute path.

This is one more follow-up fix to MDEV-22641.

Explicitly specify the dependency of the innobase library on mysys.

Also, remove stale references to CRC32_LIBRARY, which should have
been removed in commit dec3f8ca.

Make mark_join_nest_as_const() print its action into the trace.

This was done to be able to track some cases of unallocated memory
in replication tests reported by MSAN.

MDEV-22691 MSAN use-of-uninitialized-value in test maria.maria-recovery2

This caused all my_vsnprintf() using doubles to fail.
Thanks to the workaround, I was able to remove the disabling of
MSAN in dtoa().

MDEV-20302 Server hangs upon concurrent SELECT from partitioned S3

MDEV-22829 SIGSEGV in _ma_reset_history on LOCK

MDEV-22048 Assertion `binlog_table_maps == 0 ||
           locked_tables_mode == LTM_LOCK_TABLES' failed in
           THD::reset_for_next_command

Problem was that FLUSH TABLES where trying to read latest sequence state
which conflicted with a running ALTER SEQUENCE. Removed the reading
of the state, when opening a table for FLUSH, as it's not needed in this
case.

Other thing:
- Fixed a potential issue with concurrently running ALTER SEQUENCE where
  the later ALTER could potentially read old data

MDEV-22649 SIGSEGV in ha_partition::create_partitioning_metadata on ALTER
MDEV-22804 SIGSEGV in ha_partition::create_partitioning_metadata

MCOL-3875 Columnstore write cache

The main change is to change thr_lock function get_status to
return a value that indicates we have to abort the lock.

Other thing:
- Made start_bulk_insert() and end_bulk_insert() protected so that the
  insert cache can use these

The reson for the change was to make it easier to find true errors
when searching in trace logs.
"error:" should mainly be used when we have a real error

MDEV-22689 MSAN use-of-uninitialized-value in decode_bytes()

This was not a user visible issue as the huffman code lookup tables would
automatically ignore any of the unitialized bits

Fixed by adding a end-zero byte to the bit-stream buffer.

Other things:
- Fixed a (for this case) wrong assert in strmov() for myisamchk
  and aria_chk by removing the strmov()

- IF EXISTS ends with a list of all not existing object, instead of a
  separate note for every not existing object
- Produce a "Note" for all wrongly dropped objects
  (like trying to do DROP SEQUENCE for a normal table)
- Do not write existing tables that could not be dropped to binlog

Other things:
MDEV-22820 Bogus "Unknown table" warnings produced upon attempt to drop
           parent table referenced by FK
This was caused by an older version of this commit patch and later fixed

- Produce a "Note" for all wrongly dropped objects
  (Like doing DROP VIEW on a table).
- IF EXISTS ends with a list of all not existing objects, instead of a
  separate note for every not existing object.

Other things:
 - Fixed bug where one could do CREATE TEMPORARY SEQUENCE multiple times
   and create multiple temporary sequences with the same name.

The used code is largely based on code from Tencent

The problem is that in some rare cases there may be a conflict between .frm
files and the files in the storage engine. In this case the DROP TABLE
was not able to properly drop the table.

Some MariaDB/MySQL forks has solved this by adding a FORCE option to
DROP TABLE. After some discussion among MariaDB developers, we concluded
that users expects that DROP TABLE should always work, even if the
table would not be consistent. There should not be a need to use a
separate keyword to ensure that the table is really deleted.

The used solution is:
- If a .frm table doesn't exists, try dropping the table from all storage
  engines.
- If the .frm table exists but the table does not exist in the engine
  try dropping the table from all storage engines.
- Update storage engines using many table files (.CVS, MyISAM, Aria) to
  succeed with the drop even if some of the files are missing.
- Add HTON_AUTOMATIC_DELETE_TABLE to handlerton's where delete_table()
  is not needed and always succeed. This is used by ha_delete_table_force()
  to know which handlers to ignore when trying to drop a table without
  a .frm file.

The disadvantage of this solution is that a DROP TABLE on a non existing
table will be a bit slower as we have to ask all active storage engines
if they know anything about the table.

Other things:
- Added a new flag MY_IGNORE_ENOENT to my_delete() to not give an error
  if the file doesn't exist. This simplifies some of the code.
- Don't clear thd->error in ha_delete_table() if there was an active
  error. This is a bug fix.
- handler::delete_table() will not abort if first file doesn't exists.
  This is bug fix to handle the case when a drop table was aborted in
  the middle.
- Cleaned up mysql_rm_table_no_locks() to ensure that if_exists uses
  same code path as when it's not used.
- Use non_existing_Table_error() to detect if table didn't exists.
  Old code used different errors tests in different position.
- Table_triggers_list::drop_all_triggers() now drops trigger file if
  it can't be parsed instead of leaving it hanging around (bug fix)
- InnoDB doesn't anymore print error about .frm file out of sync with
  InnoDB directory if .frm file does not exists. This change was required
  to be able to try to drop an InnoDB file when .frm doesn't exists.
- Fixed bug in mi_delete_table() where the .MYD file would not be dropped
  if the .MYI file didn't exists.
- Fixed memory leak in Mroonga when deleting non existing table
- Fixed memory leak in Connect when deleting non existing table

Bugs fixed introduced by the original version of this commit:
MDEV-22826 Presence of Spider prevents tables from being force-deleted from
           other engines

The test case that was added for MDEV-21217
(commit b68f1d84)
should have only two possible outcomes for the locking SELECT statement:

(1) The statement is blocked, and the test will eventually fail
with a lock wait timeout. This is what I observed when the
code fix for MDEV-21217 was missing.

(2) The lock conflict will ensure that the statement will execute
after the rollback has completed, and an empty table will be observed.
This is the expected outcome with the recovery fix.

What occasionally happens (in some of our CI environments only, so far)
is that the locking SELECT will return all 1,000 rows of the table that
had been inserted by the transaction that was never supposed to be
committed. One possibility is that the transaction was unexpectedly
committed when the server was killed.

Let us disable the test until the reason of the failure has been
determined and addressed.

when allowing access via perfschema callbacks, update
the cached GRANT_INFO to match

With RETURNING it can happen that the user has some privileges on
the table (namely, DELETE), but later needs different privileges
on individual columns (namely, SELECT).

Do the same as in check_grant_column() - ER_COLUMNACCESS_DENIED_ERROR,
not an assert.