…ace encryption)

https://jira.percona.com/browse/PS-6789

Temporarily reverted PS-3822 "InnoDB system tablespace encryption"
https://jira.percona.com/browse/PS-3822
(commit 78b6114)
to make parallel doublewrite part of the upstream 8.0.20 merge easier.

Temporarily disabled the following MTR test cases:
- 'innodb.percona_parallel_dblwr_encrypt'
- 'innodb.percona_sys_tablespace_encrypt'
- 'innodb.percona_sys_tablespace_encrypt_dblwr'
- 'sys_vars.innodb_parallel_dblwr_encrypt_basic'
- 'sys_vars.innodb_sys_tablespace_encrypt_basic'

…b_doublewrite file when innodb_doublewrite is disabled)

https://jira.percona.com/browse/PS-6789

Temporarily reverted PS-3411 "LP #1570682: Parallel doublewrite buffer file created when skip-innodb_doublewrite is set"
https://jira.percona.com/browse/PS-3411
(commit 14318e4)
to make parallel doublewrite part of the upstream 8.0.20 merge easier.

…must crash server on I/O error)

https://jira.percona.com/browse/PS-6789

Temporarily reverted PS-5678 "Parallel doublewrite must crash server on I/O error"
https://jira.percona.com/browse/PS-5678
(commit 0f810d7)
to make parallel doublewrite part of the upstream 8.0.20 merge easier.

…rotation. ALPHA)

https://jira.percona.com/browse/PS-6789

Temporarily reverted 'buf0dblwr.cc' part of the PS-3829 "Innodb key rotation. ALPHA"
https://jira.percona.com/browse/PS-3829
(commit c7f44ee)
to make parallel doublewrite part of the upstream 8.0.20 merge easier.

…d to set O_DIRECT on xb_doublewrite when running MTR test cases)

https://jira.percona.com/browse/PS-6789

Temporarily reverted PS-1068 "Fix bug 1669414 (Failed to set O_DIRECT on xb_doublewrite when running MTR test cases)"
https://jira.percona.com/browse/PS-1068
(commit 7f41824)
to make parallel doublewrite part of the upstream 8.0.20 merge easier.

…lel doublewrite memory not freed with innodb_fast_shutdown=2)

https://jira.percona.com/browse/PS-6789

Temporarily reverted PS-1707 "LP #1578139: Parallel doublewrite memory not freed with innodb_fast_shutdown=2"
https://jira.percona.com/browse/PS-1707
(commit 8a53ed7)
to make parallel doublewrite part of the upstream 8.0.20 merge easier.

… implementation (Implement parallel doublewrite)

https://jira.percona.com/browse/PS-6789

Reverted 'parallel-doublewrite' blueprint implementation "Implement parallel doublewrite"
https://blueprints.launchpad.net/percona-server/+spec/parallel-doublewrite
(commit 4596aaa)
to make parallel doublewrite part of the upstream 8.0.20 merge easier.

Temporarily disabled the following MTR test cases:
- 'sys_vars.innodb_parallel_doublewrite_path_basic'
- 'innodb.percona_doublewrite'

https://jira.percona.com/browse/PS-6789

***
Updated man pages from MySQL Server 8.0.20 source tarball.

***
Updated 'scripts/fill_help_tables.sql' from MySQL Server 8.0.20 source
tarball.

https://jira.percona.com/browse/PS-6789

https://jira.percona.com/browse/PS-6789

***
Reverted our fix for PS-6094
"Handler fails to trigger on Error 1049 or SQLSTATE 42000 or plain sqlexception"
(https://jira.percona.com/browse/PS-6094)
(commit 31b5c73)
in favor of the upstream fix for the Bug #30561920 / #97682
"Handler fails to trigger on Error 1049 or SQLSTATE 42000 or plain sqlexception"
(https://bugs.mysql.com/bug.php?id=97682)
(commit mysql/mysql-server@72c6171).

***
Reverted our fix for PS-3630
"LP #1660255: Test innodb.innodb_mysql is unstable"
(https://jira.percona.com/browse/PS-3630)
(commit e0b5050)
in favor of the upstream fix for the Bug #30810572
"FIX INNODB-MYSQL TEST"
(commit mysql/mysql-server@2692669).

***
Reverted our 8.0.17 merge postfix
"PS-5363 (Merge MySQL 8.0.17): fixed regexps in the rpl.rpl_perfschema_threads_processlist_status MTR test case"
(https://jira.percona.com/browse/PS-5363)
(commit 8d7dd4a)
affecting 'rpl.rpl_perfschema_threads_processlist_status' MTR test case
in favor of the changes made by upstream in WL#3549
"Binlog Compression"
(commit mysql/mysql-server@1e5ae34).

***
Reverted our 8.0.18 merge postfix
"PS-5674: gen_lex_token generator reworked"
(https://jira.percona.com/browse/PS-5674)
(commit 214212a)
in favor of the changes made by upstream Bug #30765691
"FREE TOKEN SLOTS ARE EXHAUSTED IN GEN_LEX_TOKEN.CC"
(commit mysql/mysql-server@17ca03f).
'SYM_PERCONA()' macro preserved and made a synonym for upstream's 'SYM()'.
Percona Server 5.7-specific tokens
- CHANGED_PAGE_BITMAPS_SYM
- CLIENT_STATS_SYM
- CLUSTERING_SYM
- COMPRESSION_DICTIONARY_SYM
- INDEX_STATS_SYM
- TABLE_STATS_SYM
- THREAD_STATS_SYM
- USER_STATS_SYM
- ENCRYPTION_KEY_ID_SYM
explicitly assigned values starting from 1300. The same values were assigned
to them implicitly in Percona Server 8.0.19.
Percona Server 8.0-specific tokens
- EFFECTIVE_SYM
- SEQUENCE_TABLE_SYM
explicitly assigned values starting from 1350. This group has different values
than in Percona Server 8.0.19.

***
Similarly to other 'innodb.log_encrypt_<n>' MTR test cases 'innodb.log_encrypt_7'
coming from upstream 8.0.20 cloned into two 'innodb.log_encrypt_7_mk' and
'innodb.log_encrypt_7_rk'.

***
Similarly to other 'innodb.table_encrypt_<n>' MTR test cases 'innodb.table_encrypt_6'
coming from upstream 8.0.20 cloned into three 'innodb.table_encrypt_6',
'keyring_vault.table_encrypt_6' and 'keyring_vault.table_encrypt_6_directory'.

***
VERSION raised to "8.0.20-11".
univ.i version raised to "11".

https://jira.percona.com/browse/PS-6789

In the fix for Bug #30508721
"MTR DOESN'T KEEP TRACK OF THE STATE OF INNODB MONITORS"
(commit mysql/mysql-server@abd33c2)
Oracle extended MTR 'check-testcase' procedure with additional comparison of
data from InnoDB metrics state. They also introduced
'mysql-test/include/innodb_monitor_restore.inc' MTR include file that is
supposed to reset InnoDB monitors to their default state.

'mysql-test/include/innodb_monitor_restore.inc' extended with enabling
Percona-specific monitors, those that are enabled (defined with
'MONITOR_DEFAULT_ON' flag) by default.

Similarly to what was done in the upstream patch
  "SET GLOBAL innodb_monitor_enable=default;"
  "SET GLOBAL innodb_monitor_disable=default;"
  "SET GLOBAL innodb_monitor_reset_all=default;"
statement sequences were substituted with
'--source include/innodb_monitor_restore.inc' all over the test code.

As the result, fixed the following MTR test cases:
- 'innodb.innodb_idle_flush_pct'
- 'innodb.lock_contention_big'
- 'innodb.monitor'
- 'innodb.percona_ahi_partitions'
- 'innodb.percona_changed_page_bmp_flush_5446'
- 'innodb.transportable_tbsp-debug'
- 'innodb_zip.transportable_tbsp_debug_zip'
- 'sys_vars.innodb_monitor_disable_basic'
- 'sys_vars.innodb_monitor_enable_basic'
- 'sys_vars.innodb_monitor_reset_all_basic'
- 'sys_vars.innodb_monitor_reset_basic'
- 'sys_vars.innodb_purge_run_now_basic'
- 'sys_vars.innodb_purge_stop_now_basic'

…ated MTR test cases

https://jira.percona.com/browse/PS-6789

The following MTR test cases re-recorded because of the 'filesort' improvements
introduced in the fix for Oracle's Bug #30776132
"MAKE FILESORT KEYS CONSISTENT BETWEEN FIELDS AND ITEMS"
(commit mysql/mysql-server@6d587a6)
- 'main.pool_of_threads'
- 'main.pool_of_threads_high_prio_tickets'.

The following MTR test cases re-recorded because of the changed execution plan
(more hash joins instead of nested blok loops) introduced in these improvements
Bug #30528604
"DELETE THE PRE-ITERATOR EXECUTOR"
(commit mysql/mysql-server@ef166f8),
Bug #30473261
"CONVERT THE INDEX SUBQUERY ENGINES INTO USING THE ITERATOR EXECUTOR"
(commit mysql/mysql-server@cb4116e)
(commit mysql/mysql-server@629b549)
(commit mysql/mysql-server@5a41fba)
(commit mysql/mysql-server@31bd903)
(commit mysql/mysql-server@75bbe1b)
(commit mysql/mysql-server@6226c1a)
(commit mysql/mysql-server@0b45e96)
(commit mysql/mysql-server@8e45d7e)
(commit mysql/mysql-server@7493ae4)
(commit mysql/mysql-server@a5f60bf)
(commit mysql/mysql-server@609b86e),
Bug #30912972
"ASSERTION `KEYLEN == M_START_KEY.LENGTH' FAILED"
(commit mysql/mysql-server@b28bea5)
- 'audit_log.audit_log_filter_db'
- 'main.pool_of_threads'
- 'main.pool_of_threads_high_prio_tickets'
- 'main.percona_expand_fast_index_creation'
- 'main.percona_sequence_table'

https://jira.percona.com/browse/PS-6789

Re-recorded 'main.bug74778' MTR test case because of the new 'SHOW_ROUTINE'
privilege implemented by Oracle in WL #9049
"Add a dynamic privilege for stored routine backup"
(https://dev.mysql.com/worklog/task/?id=9049)
(commit mysql/mysql-server@3e41e44)

… MTR test case

https://jira.percona.com/browse/PS-6789

Re-recorded 'main.backup_locks_mysqldump' MTR test case because of the new default
'mysqldump' network timeout introduced in the fix for Oracle Bug #30755992 / #98203
"mysql dump sufficiently long network timeout too short"
(https://bugs.mysql.com/bug.php?id=98203)
(commit mysql/mysql-server@1f90fad)

https://jira.percona.com/browse/PS-6789

Re-recorded 'main.bug88797' MTR test case because of the new deprecation
warning introduced in the implementation of WL #13325
"Deprecate VALUES syntax in INSERT ... ON DUPLICATE KEY UPDATE"
(https://dev.mysql.com/worklog/task/?id=13325)
(commit mysql/mysql-server@6f3b9df)

- Changed use of (Field*)::real_maybe_null to (Field*)::is_nullable due to
  changes in upstream at c5f8a62
- Added macro trickery to undefine and redefine ZSTD macro required for rocksdb
  around including sql/sql_class.h in order to prevent collision with new
  binlog compression type ZSTD.
- chmod +x to mysql-test/mysql-test-run.pl
- Re-recorded test(s) due to binog offet changes:
  - rocksdb.read_only_tx
- Re-recorded test(s) due to new EXPLAIN result:
  - rocksdb.type_enum_indexes
- Re-recorded test(s) due to new "hash join" EXPLAIN result:
  - rocksdb.index_merge_rocksdb2
- Re-recorded test(s) due to new deprecation warning
  "Warning  1287  'VALUES function' is deprecated ...":
  - rocksdb.rocksdb
  - rocksdb.insert_with_keys
- Re-recorded test(s) due to new column 'Require_table_primary_key_check'
  appearing in 'SHOW CREATE TABLE mysql.slave_relay_log_info;':
  - rocksdb_rppl.rpl_rocksdb_stm_mixed_crash_safe
  - rocksdb_rpl.rpl_rocksdb_row_crash_safe
- Re-recorded test(s) due to changes to common test in 'extra/rpl_tests':
  - rocksdb_rpl.rpl_rocksdb_stm_mixed_crash_safe
  - rocksdb_rpl.rpl_rocksdb_row_crash_safe

- Fixed linking issue with PerconaFT by adding new minchassis dependency to
  tokudbdump and advancing git submodule commmit pointer.
- Changed use of (Field*)::real_maybe_null to (Field*)::is_nullable due to
  changes in upstream at c5f8a62
- Re-recorded test(s) due to new hash join in explain result:
  - tokudb.type.bit
  - tokudb.type_time
  - tokudb.cluster_2968-0
  - tokudb.cluster_2968-1
  - tokudb.cluster_2968-2
  - tokudb.cluster_2968-3
- Re-recorded test(s) due to new deprecation warning
  "Warning  1287  '@@max_length_for_sort_data' is deprecated ...":
  - tokudb.type_bit
  - tokudb.type_bit_innnodb
- Re-recorded test(s) due to new deprecation warning
  "Warning  1287  'VALUES function' is deprecated ...":
  - tokudb.fast_upsert_values
- Re-recorded test(s) with either ORDER BY or --sorted_result due to
  non-deterministic query order results:
  - tokudb.type_bit
  - tokudb.type_year
- Re-recorded test(s) due to new behavior of debug function WEIGHT_STRING:
  - tokudb.type_temporal_fractional
- Re-recorded test(s) due to new column 'Require_table_primary_key_check'
  appearing in 'SHOW CREATE TABLE mysql.slave_relay_log_info;':
  - tokudb_rpl.rpl_tokudb_row_crash_safe
  - tokudb_rpl.rpl_tokudb_stm_mixed_crash_safe
- Re-recorded test(s) due to changes to common test in 'extra/rpl_tests':
  - tokudb_rpl.rpl_tokudb_row_crash_safe
  - tokudb_rpl.rpl_tokudb_stm_mixed_crash_safe
- Re-recorded test(s) due to change in SHOW CREATE TABLE that no longer shows
  INT display width:
  - tokudb_parts.partition_max_parts_hash_tokudb
  - tokudb_parts.partition_max_parts_key_tokudb
- Re-recorded test(s) due to error code changes:
  - tokudb_backup.tokudb_backup_exclude