Post push fix.

when "replicate_wild_do_table" and "replicate_wild_ignore_table" filters
and changed dynamically the filter list gets cleared but the corresponding
"wild_do_table_inited" and "wild_ignore_table_inited" flags are not getting
cleared.

Fix: Clear the flags.

trx_t::rollback(): Renamed from trx_rollback_to_savepoint().

trx_t::rollback_low(): Renamed from trx_rollback_to_savepoint_low().

fts_sql_commit(): Defined as an alias of trx_commit_for_mysql().
fts_sql_rollback(): Defined as an alias of trx_t::rollback().

fts_rename_aux_tables_to_hex_format(): Fix the error handling
that likely never worked because we failed to roll back the
first transaction.

trx_rollback_to_savepoint(): Invoke trx_t::is_wsrep().

Replace wsrep_on() with trx_t::is_wsrep() where possible.

Also, rename some functions to member functions and
remove unused DBUG_EXECUTE_IF instrumentation:

trx_t::commit(): Renamed from trx_commit().

trx_t::commit_low(): Renamed from trx_commit_low().

trx_t::commit_in_memory(): Renamed from trx_commit_in_memory().

MDEV-22337 Assertion `Alloced_length >= (str_length + length + net_le… …ngth_size(length))' failed in Binary_string::q_net_store_data on long MULTIPOLYGON query with session_track_user_variables=1 (optimized builds).

We have to reserve enough space in String to use q_something().
Also pointer calculations fixed.

…while using json_arrayagg() as a window function.

We don't support JSON_ARRAYAGG and JSON_OBJECTAGG in window functions
yet.

Problem:
=======
SET @@GLOBAL.replicate_wild_ignore_table='';
SET @@GLOBAL.replicate_wild_do_table='';

Reports following valgrind error.

Conditional jump or move depends on uninitialised value(s)
Rpl_filter::set_wild_ignore_table(char const*) (rpl_filter.cc:439)

Conditional jump or move depends on uninitialised value(s)
at 0xF60390: delete_dynamic (array.c:304)
by 0x74F3F2: Rpl_filter::set_wild_do_table(char const*) (rpl_filter.cc:421)

Analysis:
========
List of values provided for options "wild_do_table" and "wild_ignore_table" are
stored in DYNAMIC_ARRAYS.  When an empty list is provided these dynamic arrays
are not initialized.  Existing code treats empty element list as an error and
tries to clean the uninitialized list. This results in above valgrind issue.

Fix:
===
The clean up should be initiated only when there is an error while parsing the
'wild_do_table' or 'wild_ignore_table' list and the dynamic_array is in
initialized state. Otherwise for empty list it should simply return success.

During the UPDATE of PRIMARY KEY columns, we may miscalculate the
size of the clustered index record.

row_upd_clust_rec_by_insert(): Pass the total number of off-page columns,
which may include such columns that were inherited from the record
and not created as part of the UPDATE operation.

This is based on
mysql/mysql-server@490c45e8c8e07197958dbb21214fd45ed668b559
which is a follow-up to
mysql/mysql-server@1fa475b85d24de4b9ce2958c0eed738c221fc82c
which we filed and fixed as MDEV-21511.

No test case was provided by Oracle.

INSERT...SELECT reading from an InnoDB table is slow due to
creating explicit record locks. Use the sequence engine instead.

Also, remove the space before rtr_page_need_second_split
to actually make the debug injection work.

when detecting running mysqld processes to stop,
ignore processes in different namespaces.

- buf_page_get_gen() fails to set error value when it initializes the
page with redo logs.

We need to make sure that hton is not same as view_pseudo_hton
that is not NULL but not usable.

Several MYSQL_SYSVAR_STR parameters that employ both a validate
function callback fail to copy the string for saving the
validated value. The affected variables include the following:

innodb_ft_aux_table
innodb_ft_server_stopword_table
innodb_ft_user_stopword_table
innodb_buffer_pool_filename

The test case is an enhanced version of
mysql/mysql-server@0b0c30641fd66336e87394ac28587e40864f8af9
and the code changes are inspired by their fixes.

We are also importing and adjusting the test innodb_fts.stopword
to get coverage for the variable innodb_ft_user_stopword_table.

buf_dump(), buf_load(): Protect srv_buf_dump_filename with
LOCK_global_system_variables.

fts_load_user_stopword(): Minor cleanup

fts_load_stopword(): Remove the parameter global_stopword_table.

innobase_fts_load_stopword(): Protect innodb_server_stopword_table
against concurrent SET GLOBAL.

The json_arrayagg::val_str should handle NULL result.

Replace all fsync() with fdatasync() when possible (e.g. On Linux)

InnoDB doesn't care about file timestamps. So, to achieve a better
performance it makes sense to use fdatasync() everywhere.

file_io::flush(): renamed from flush_data_only()

os_file_flush_data(): removed

os_file_sync_posix(): renamed from os_file_fsync_posix(). Now it uses
fdatasync() when it's available.

innodb_buffer_pool_evict_uncompressed(): Restart the loop when
prev_block might not enjoy mutex protection.

This is based on
mysql/mysql-server@eccaecac070b6747ecf14d6b9150791f8c3e8f6d

- Inplace alter shouldn't set default date column as '0000-00-00' when
table is not empty. So mysql_inplace_alter_table() copied
alter_ctx.error_if_not_empty to a new field of Alter_inplace_info.
In ha_innobase::check_if_supported_inplace_alter() should check the
error_if_not_empty flag and return INPLACE_NOT_SUPPORTED if the table
is not empty

lock

--ftwrl-wait-timeout does not finish mariabackup execution when acquired
backup lock can't be grabbed for the certain amount of time, it just
waits for a long queries finishing before acquiring the lock to avoid
unnecessary locking.

This commit extends --ftwrl-wait-timeout so, that mariabackup execution
is finished if it waits for backup lock during certain amount of time.

If any of default names clashes with existing names find next large
enough name gap for the requested number of partitions.

This is continuation of MDEV-22153 bug when contiguity of history
partitions is broken. ha_partition::open_read_partitions() can not
handle non-contiguous list of default partitions.

Fix: when default partition is dropped convert list of partitions to
non-default.

dict_stats_update_if_needed(): Replace the parameter THD*
with const trx_t& so that trx_t::is_wsrep() can be invoked
instead of the more expensive wsrep_on().

Replace also other occurrences of wsrep_on() with trx_t::is_wsrep().

The only change is a change of the version number.
As noted in commit 02af6278
there were no changes to InnoDB between MySQL 5.6.46 and 5.6.47
either.

The function wsrep_on() was being called rather frequently
in InnoDB and XtraDB. Let us cache it in trx_t and invoke
trx_t::is_wsrep() instead.

innobase_trx_init(): Cache trx->wsrep = wsrep_on(thd).

ha_innobase::write_row(): Replace many repeated calls to current_thd,
and test the cheapest condition first.