When creating fields for UNION results, Field_null is not allowed.
Should create binary(0) instead.

Pass char* to WSREP_LOG and others, instead of non-POD objects

Add a couple of NO_XXX prprocessor constants to wolfssl build.
Looked into cmake defaults, those are set there too. Some of
these are (supposedly) weak ciphers, and some just fallen out from wide
use.

This patch fixes the bug that TRIM(BOTH ... FROM $str), TRIM(LEADING ... FROM $str),
and TRIM(TRAILING ... FROM $str) failed with errors when executing on Spider.

Victim threads which are in currently in process of aborting or already
aborted should be skipped for another kill process.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>

MDEV-25740 Assertion `!wsrep_has_changes(thd) || (thd->lex->sql_command == SQLCOM_CREATE_TABLE && !thd->is_current_stmt_binlog_format_row())' failed in void wsrep_commit_empty(THD*, bool)

Using ROLLBACK with `completion_type = CHAIN` result in start of
transaction and implicit commit before previous WSREP internal data is
cleared.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>

MDEV-22421 Galera assertion !wsrep_has_changes(thd) || (thd->lex->sql_command == SQLCOM_CREATE_TABLE && !thd->is_current_stmt_binlog_format_row())

Updates to transaction registry table shouldn't be replicated in
cluster so there is no need to append wsrep keys.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>

Thanks to Nikita Malyavin for noticing this.
The dead code that was originally introduced in
mysql/mysql-server@b8bd31740cd7088f3a3c164981c7ccda487d301d
was added in commit 2e814d47
to this code base.

rename files `version` -> `version_full`

FetchIndexRootPages::operator(): handle REDUNDANT vs DYNAMIC case specifically.
Other combinations seems fine as is.

This is important since Sys_var_typelib and its descendants return
pointers to constant symbols from *_value_ptr, which are situated in
write-protected-memory.

* functions const-qualified:
  - value_ptr
  - session_value_ptr
  - global_value_ptr
  - default_value_ptr
  - Sys_var_vers_asof::value_ptr
  - other minor private ones

* remove C-style typecasts when it discards qualifiers

MDEV-16026: Forbid global system_versioning_asof in non-default time zone

* store `system_versioning_asof` in unix time;
* both session and global vars are processed in session timezone;
* setting `default` does not copy global variable anymore. Instead, it sets
  system_time to SYSTEM_TIME_UNSPECIFIED, which means that no 'AS OF' time
  is applied and `now()` can be assumed

As a regression, we cannot assign values below 1970 (UTC) anymore

MDEV-16481: set global system_versioning_asof=sf() crashes in specific case

* sys_vars.h: add `MYSQL_TIME` field to `set_var::save_result`
* sys_vars.ic: get rid of calling `var->value->get_date()` from
 `Sys_var_vers_asof::update()`
* versioning.sysvars: add test; remove double warning

refactor Sys_var_vers_asof

* inherit from sys_var rather than Sys_var_enum
* remove junk "DEFAULT" keyword. There is DEFAULT in SQL grammar for it.
* make all conversions in check() to avoid possible errors
* avoid double var->value evaluation, which could
  consequence in undefined behavior

Workaround WolfSSL bug https://github.com/wolfSSL/wolfssl/issues/4242
(heap overflow) by using fastmath library everywhere, except Windows clang

Before the patch, default math library was used on all 32bit platforms.

btr_scrub_start_space(): Avoid an unnecessary tablespace lookup
and related acquisition of fil_system->mutex. In MariaDB Server 10.3
we would get deadlocks between that mutex and a crypt_data mutex.

The fix was developed by Thirunarayanan Balathandayuthapani.

On POSIX systems, InnoDB would unconditionally acquire advisory locks
on the files that it opens. On Linux, this would be observable by
a large number of entries in /proc/locks.

Other storage engines would only acquire advisory locks on files
based on the Boolean configuration parameter external_locking.

Let InnoDB do the same.

NOTE: The --skip-external-locking is activated by default. To have
InnoDB acquire advisory locks, --external-locking must be specified.

Reviewed by: Sergei Golubchik

trx_t::will_lock: Changed the type to bool.

trx_t::is_autocommit_non_locking(): Replaces
trx_is_autocommit_non_locking().

trx_is_ac_nl_ro(): Remove (replaced with equivalent assertion expressions).

assert_trx_nonlocking_or_in_list(): Remove.
Replaced with at least as strict checks in each place.

check_trx_state(): Moved to a static function; partially replaced with
individual debug assertions implementing equivalent or stricter checks.

This is a backport of commit 7b51d11c
from 10.5.

make BACKUP STAGE behave as FTWRL, desyncing and pausing the node
to prevent BF threads (appliers) from interfering with blocking stages.
This is needed because BF threads don't respect BACKUP MDL locks.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>

MDEV-26062 : InnoDB: WSREP: referenced FK check fail: Lock wait index `PRIMARY` table `schema`.`child_table`

Problem was that not all normal error codes where not handled
after wsrep_row_upd_check_foreign_constraints() call. Furhermore,
debug assertion did not contain all normal error cases. Changed
ib:: calls to WSREP_ calls to use wsrep instrumentation.

Problem:
=========
As a part of MDEV-14398 patch, InnoDB added and removed
the tablespace from default encrypt list. But InnoDB removes
the tablespace from the default encrypt list too early due to
i) other encryption thread working on the tablespace
ii) When tablespace is being flushed at the end of
key rotation

InnoDB fails to decrypt/encrypt the tablespace since
the tablespace removed too early and it leads to
test case failure.

Solution:
=========
Avoid the removal of tablespace from default_encrypt_list
only when
1) Another active encryption thread working on tablespace
2) Eligible for tablespace key rotation
3) Tablespace is in flushing phase

Removed the workaround in encryption.innodb_encryption_filekeys test case.

failed for TokuDB engine CREATE TABLE

Analysis: Assertion failure happens because the database doesn't exist to
create the table but ha_tokudb::create() still returns false.
So error is not reported.
Fix: Store the error state and report the error.

Tests for the Spider storage engine often use the following idiom:

--let $command=CREATE TABLE t1 (...);CREATE TABLE t2 (...); ...
--eval $command

However, the idiom seems to work in the normal protocol, but fails
in the prepared statement (ps) protocol.
As testing CREATE TABLE statements in the ps protocol, we wrap the
idiom by --disable_ps_protocol and --enable_ps_protocol.

as always, multi-commands don't work in --ps

Set tests to non-valgrind:
  oqgraph.social
  encryption.innodb-page_encryption
  binlog_encryption.encrypted_master
  innodb.innodb-page_compression_lz4
  main.lock_multi_bug38499
  main.lock_multi_bug38691

  modified:   storage/connect/bsonudf.cpp
  modified:   storage/connect/jsonudf.cpp

- Stringify option is now a ; separated list of columns
  modified:   storage/connect/json.cpp
  modified:   storage/connect/json.h
  modified:   storage/connect/mongo.h
  modified:   storage/connect/tabbson.cpp
  modified:   storage/connect/tabcmg.cpp
  modified:   storage/connect/tabcmg.h
  modified:   storage/connect/tabjmg.cpp
  modified:   storage/connect/tabjmg.h
  modified:   storage/connect/tabjson.cpp

- PrepareColist not a static function anymore (+ typo)
  modified:   storage/connect/taboccur.cpp

- JDVC: Recognize schema (database) from a wrapper server
  modified:   storage/connect/tabjdbc.cpp