Merge 10.6 into 10.7

24 files changed, 271 insertions, 434 deletions

diff --git a/debian/mariadb-test-data.lintian-overrides b/debian/mariadb-test-data.lintian-overrides
index 630e9fcab1e..de210af2a39 100644
--- a/debian/mariadb-test-data.lintian-overrides
+++ b/debian/mariadb-test-data.lintian-overrides
@@ -1,6 +1,13 @@
 # These should be moved, see https://jira.mariadb.org/browse/MDEV-21654
 arch-dependent-file-in-usr-share usr/share/mysql/mysql-test/suite/plugins/pam/pam_mariadb_mtr.so
 arch-independent-package-contains-binary-or-object usr/share/mysql/mysql-test/suite/plugins/pam/pam_mariadb_mtr.so
+# Mainly for support for *BSD family. Not right way to do but this is test package and not for production
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/std_data/checkDBI_DBD-MariaDB.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/suite/engines/rr_trx/run_stress_tx_rr.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/suite/funcs_1/lib/DataGen_local.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/suite/funcs_1/lib/DataGen_modify.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/suite/funcs_2/lib/gen_charset_utf8.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/suite/rpl/extension/checksum.pl]
 # Intentional for test files
 national-encoding usr/share/mysql/mysql-test/*
 # Extra test documentation files that really need to be kept in context in test directory
diff --git a/debian/mariadb-test.lintian-overrides b/debian/mariadb-test.lintian-overrides
index 9de1b3784ff..b9f45b862b5 100644
--- a/debian/mariadb-test.lintian-overrides
+++ b/debian/mariadb-test.lintian-overrides
@@ -1,3 +1,8 @@
 # These should be moved, see https://jira.mariadb.org/browse/MDEV-21653
 arch-dependent-file-in-usr-share usr/share/mysql/mysql-test/lib/My/SafeProcess/my_safe_process
 arch-dependent-file-in-usr-share usr/share/mysql/mysql-test/lib/My/SafeProcess/wsrep_check_version
+# Mainly for support for *BSD family. Not right way to do but this is test package and not for production
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/lib/process-purecov-annotations.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/lib/v1/mysql-test-run.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/mysql-stress-test.pl]
+incorrect-path-for-interpreter /usr/bin/env perl != /usr/bin/perl [usr/share/mysql/mysql-test/mysql-test-run.pl]
diff --git a/debian/source/lintian-overrides b/debian/source/lintian-overrides
index a0235489fb3..c8793e1aa02 100644
--- a/debian/source/lintian-overrides
+++ b/debian/source/lintian-overrides
@@ -4,23 +4,82 @@ version-substvar-for-external-package mariadb-client-core-10.7 -> mysql-client-5
 version-substvar-for-external-package mariadb-server-10.7 -> mysql-server
 version-substvar-for-external-package libmariadb-dev -> libmysqlclient-dev
 version-substvar-for-external-package libmariadb-dev -> libmysqld-dev
-version-substvar-for-external-package mariadb-server-10.7 -> mysql-client-5.5
-version-substvar-for-external-package mariadb-server-10.7 -> mysql-client-5.6
-version-substvar-for-external-package mariadb-server-10.7 -> mysql-client-5.7
-version-substvar-for-external-package mariadb-server-10.7 -> mysql-client-8.0
-version-substvar-for-external-package mariadb-client-10.7 -> mysql-client-core-5.1
-version-substvar-for-external-package mariadb-client-10.7 -> mysql-client-core-5.5
-version-substvar-for-external-package mariadb-client-10.7 -> mysql-client-core-5.6
-version-substvar-for-external-package mariadb-client-10.7 -> mysql-client-core-5.7
-version-substvar-for-external-package mariadb-client-10.7 -> mysql-client-core-8.0
+version-substvar-for-external-package mariadb-server-10.7 -> mysql-client-5.*
+version-substvar-for-external-package mariadb-server-10.7 -> mysql-client-8.*
+version-substvar-for-external-package mariadb-client-10.7 -> mysql-client-core-5.*
+version-substvar-for-external-package mariadb-client-10.7 -> mysql-client-core-8.*
 version-substvar-for-external-package libmariadbd-dev -> libmariadbclient-dev
 # ColumnStore not used in Debian, safe to ignore. Reported upstream in https://jira.mariadb.org/browse/MDEV-24124
 source-is-missing storage/columnstore/columnstore/utils/jemalloc/libjemalloc.so.2
 # Must be fixed upstream
-source-is-missing storage/mroonga/vendor/groonga/examples/dictionary/html/js/jquery-ui-1.8.18.custom.js*
+source-is-missing storage/mroonga/vendor/groonga/examples/dictionary/html/js/jquery-ui-*.custom.js
 # Intentional control relationships
-version-substvar-for-external-package Replaces * ${source:Version} libmariadbd-dev -> libmariadbclient-dev
-version-substvar-for-external-package Replaces * ${source:Version} libmariadb-dev -> libmysqlclient-dev
-version-substvar-for-external-package Replaces * ${source:Version} libmariadb-dev -> libmysqld-dev
+version-substvar-for-external-package Replaces * libmariadbd-dev -> libmariadbclient-dev
+version-substvar-for-external-package Replaces * libmariadb-dev -> libmysqlclient-dev
+version-substvar-for-external-package Replaces * libmariadb-dev -> libmysqld-dev
 # We can't change build dependencies on a stable branch (10.5..10.8) so just override this
 missing-build-dependency-for-dh-addon systemd *
+# Data or test files where long lines are justified
+very-long-line-length-in-source-file *.test *
+very-long-line-length-in-source-file *.result *
+very-long-line-length-in-source-file BUILD/compile-*
+very-long-line-length-in-source-file *COPYING.rtf *
+# These are mainly found under extra/wolfssl
+very-long-line-length-in-source-file *.cproject *
+very-long-line-length-in-source-file *.md *
+very-long-line-length-in-source-file *.scfg *
+very-long-line-length-in-source-file *.launch *
+very-long-line-length-in-source-file extra/wolfssl/wolfssl/IDE/Espressif/ESP-IDF/test/test_wolfssl.c *
+very-long-line-length-in-source-file extra/wolfssl/wolfssl/configure.ac *
+very-long-line-length-in-source-file extra/wolfssl/wolfssl/doc/formats/html/html_changes/tabs.css *
+# Preprocessed C files which have long lines
+very-long-line-length-in-source-file extra/wolfssl/wolfssl/wolfcrypt/src/*.i *
+# These are all results for test cases and similar so they can be
+# especially formatted to be too long
+very-long-line-length-in-source-file mysql-test/*.dump *
+very-long-line-length-in-source-file mysql-test/*.inc *
+very-long-line-length-in-source-file mysql-test/*.rdiff *
+very-long-line-length-in-source-file mysql-test/*.txt *
+very-long-line-length-in-source-file mysql-test/*.weekly *
+# Test file
+very-long-line-length-in-source-file plugin/handler_socket/regtest/test_01_lib/test19.expected *
+# SQL source file that has very long inserts/selects
+very-long-line-length-in-source-file mysql-test/std_data/init_file_longline_3816.sql *
+very-long-line-length-in-source-file scripts/fill_help_tables.sql *
+very-long-line-length-in-source-file scripts/mysql_system_tables.sql *
+very-long-line-length-in-source-file scripts/mysql_test_data_timezone.sql *
+# Machine formated HTML
+very-long-line-length-in-source-file sql/share/charsets/languages.html *
+very-long-line-length-in-source-file sql/share/errmsg-utf8.txt *
+# Very long test string
+very-long-line-length-in-source-file storage/archive/archive_test.c line 30 is 1051 characters long (>512)
+# autogenerated thrift file
+very-long-line-length-in-source-file storage/cassandra/gen-cpp/cassandra_types.h *
+# ColumnStore ignores
+# In Directory mysql-test are some long test includes
+very-long-line-length-in-source-file storage/columnstore/columnstore/.drone.jsonnet *
+very-long-line-length-in-source-file storage/columnstore/columnstore/CMakeLists.txt *
+very-long-line-length-in-source-file storage/columnstore/columnstore/mysql-test/columnstore/csinternal/include/autopilot_create_datatypetestm_tables.inc *
+very-long-line-length-in-source-file storage/columnstore/columnstore/mysql-test/columnstore/csinternal/include/autopilot_create_datatypeupdate_table.inc *
+very-long-line-length-in-source-file storage/columnstore/columnstore/*.xmi *
+very-long-line-length-in-source-file storage/columnstore/columnstore/dbcon/doc/q19_plan.txt *
+very-long-line-length-in-source-file storage/columnstore/columnstore/utils/udfsdk/docs/source/reference/mcsv1Context.rst *
+very-long-line-length-in-source-file storage/columnstore/columnstore/utils/winport/win_setup_mysql_part1.sql *
+# Minified CSS files. These appear in several places
+very-long-line-length-in-source-file *badge_only.css *
+very-long-line-length-in-source-file *theme.css line *
+# General storage ignores
+very-long-line-length-in-source-file storage/mroonga/vendor/groonga/examples/dictionary/html/css/smoothness/jquery-ui-1.8.12.custom.css *
+very-long-line-length-in-source-file storage/rocksdb/mysql-test/rocksdb/t/bypass_select_basic_bloom-master.opt *
+very-long-line-length-in-source-file storage/rocksdb/mysql-test/rocksdb/t/type_enum.inc *
+very-long-line-length-in-source-file storage/rocksdb/mysql-test/rocksdb/t/type_set.inc *
+very-long-line-length-in-source-file storage/rocksdb/rocksdb/docs/_includes/footer.html *
+very-long-line-length-in-source-file storage/rocksdb/rocksdb/docs/_posts/*.markdown line *
+very-long-line-length-in-source-file storage/spider/mysql-test/spider/bugfix/include/sql_mode_init.inc *
+very-long-line-length-in-source-file storage/tokudb/PerconaFT/cmake_modules/TokuBuildTagDatabases.cmake *
+very-long-line-length-in-source-file storage/tokudb/PerconaFT/third_party/xz-4.999.9beta/m4/po.m4 *
+# These are generated files which should not make any harm
+source-contains-autogenerated-visual-c++-file storage/columnstore/columnstore/*.rc
+source-contains-autogenerated-visual-c++-file storage/columnstore/columnstore/*.h
+source-contains-autogenerated-visual-c++-file win/upgrade_wizard/resource.h
+source-contains-autogenerated-visual-c++-file win/upgrade_wizard/upgrade.rc
diff --git a/mysql-test/suite/innodb/r/dropdb_cs.result b/mysql-test/suite/innodb/r/dropdb_cs.result
new file mode 100644
index 00000000000..59f02c74a04
--- /dev/null
+++ b/mysql-test/suite/innodb/r/dropdb_cs.result
@@ -0,0 +1,16 @@
+#
+# MDEV-28802 DROP DATABASE in InnoDB still is case-insensitive
+#
+SET @save_fpt=@@GLOBAL.innodb_file_per_table;
+SET GLOBAL innodb_file_per_table=0;
+CREATE DATABASE Db;
+CREATE TABLE Db.t1 (c1 INT KEY) ENGINE=InnoDB;
+CREATE DATABASE DB;
+DROP DATABASE DB;
+SELECT NAME FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'D%';
+NAME
+Db/t1
+DROP DATABASE Db;
+SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'D%';
+TABLE_ID	NAME	FLAG	N_COLS	SPACE	ROW_FORMAT	ZIP_PAGE_SIZE	SPACE_TYPE
+SET GLOBAL innodb_file_per_table=@save_fpt;
diff --git a/mysql-test/suite/innodb/t/dropdb_cs.test b/mysql-test/suite/innodb/t/dropdb_cs.test
new file mode 100644
index 00000000000..0053ca732be
--- /dev/null
+++ b/mysql-test/suite/innodb/t/dropdb_cs.test
@@ -0,0 +1,17 @@
+--source include/have_innodb.inc
+--source include/have_case_sensitive_file_system.inc
+
+--echo #
+--echo # MDEV-28802 DROP DATABASE in InnoDB still is case-insensitive
+--echo #
+
+SET @save_fpt=@@GLOBAL.innodb_file_per_table;
+SET GLOBAL innodb_file_per_table=0;
+CREATE DATABASE Db;
+CREATE TABLE Db.t1 (c1 INT KEY) ENGINE=InnoDB;
+CREATE DATABASE DB;
+DROP DATABASE DB;
+SELECT NAME FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'D%';
+DROP DATABASE Db;
+SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'D%';
+SET GLOBAL innodb_file_per_table=@save_fpt;
diff --git a/mysql-test/suite/innodb_fts/r/concurrent_insert.result b/mysql-test/suite/innodb_fts/r/concurrent_insert.result
index e91ea02b1de..3cb48d22df1 100644
--- a/mysql-test/suite/innodb_fts/r/concurrent_insert.result
+++ b/mysql-test/suite/innodb_fts/r/concurrent_insert.result
@@ -19,7 +19,7 @@ INSERT INTO t2 VALUES('mariadb');
 connection default;
 SET @saved_dbug = @@GLOBAL.debug_dbug;
 SET GLOBAL debug_dbug ='+d,fts_instrument_sync_request,ib_optimize_wq_hang';
-SET DEBUG_SYNC= 'fts_instrument_sync_request
+SET DEBUG_SYNC= 'fts_sync_end
 		 SIGNAL drop_index_start WAIT_FOR sync_op';
 INSERT INTO t1 VALUES('Keyword');
 connect con1,localhost,root,,,;
diff --git a/mysql-test/suite/innodb_fts/r/sync.result b/mysql-test/suite/innodb_fts/r/sync.result
index 928efffdb21..74a5d2f13fb 100644
--- a/mysql-test/suite/innodb_fts/r/sync.result
+++ b/mysql-test/suite/innodb_fts/r/sync.result
@@ -11,19 +11,19 @@ INSERT INTO t1(title) VALUES('database');
 connection con1;
 SET @old_dbug = @@SESSION.debug_dbug;
 SET debug_dbug = '+d,fts_instrument_sync_debug';
-SET DEBUG_SYNC= 'fts_write_node SIGNAL written WAIT_FOR selected';
+SET DEBUG_SYNC= 'fts_sync_end SIGNAL written WAIT_FOR selected';
 INSERT INTO t1(title) VALUES('mysql database');
 connection default;
 SET DEBUG_SYNC= 'now WAIT_FOR written';
 SET GLOBAL innodb_ft_aux_table="test/t1";
 SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_CACHE;
 WORD	FIRST_DOC_ID	LAST_DOC_ID	DOC_COUNT	DOC_ID	POSITION
+SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
+WORD	FIRST_DOC_ID	LAST_DOC_ID	DOC_COUNT	DOC_ID	POSITION
 database	2	3	2	2	0
 database	2	3	2	3	6
 mysql	1	3	2	1	0
 mysql	1	3	2	3	0
-SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
-WORD	FIRST_DOC_ID	LAST_DOC_ID	DOC_COUNT	DOC_ID	POSITION
 SET GLOBAL innodb_ft_aux_table=default;
 SELECT * FROM t1 WHERE MATCH(title) AGAINST('mysql database');
 FTS_DOC_ID	title
@@ -59,7 +59,7 @@ INSERT INTO t1(title) VALUES('mysql');
 INSERT INTO t1(title) VALUES('database');
 connection con1;
 SET debug_dbug = '+d,fts_instrument_sync_debug';
-SET DEBUG_SYNC= 'fts_write_node SIGNAL written WAIT_FOR inserted';
+SET DEBUG_SYNC= 'fts_sync_end SIGNAL written WAIT_FOR inserted';
 INSERT INTO t1(title) VALUES('mysql database');
 connection default;
 SET DEBUG_SYNC= 'now WAIT_FOR written';
@@ -70,14 +70,14 @@ SET debug_dbug = @old_dbug;
 SET GLOBAL innodb_ft_aux_table="test/t1";
 SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_CACHE;
 WORD	FIRST_DOC_ID	LAST_DOC_ID	DOC_COUNT	DOC_ID	POSITION
+database	4	4	1	4	6
+mysql	4	4	1	4	0
 SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
 WORD	FIRST_DOC_ID	LAST_DOC_ID	DOC_COUNT	DOC_ID	POSITION
 database	2	3	2	2	0
 database	2	3	2	3	6
-database	4	4	1	4	6
-mysql	1	4	3	1	0
-mysql	1	4	3	3	0
-mysql	1	4	3	4	0
+mysql	1	3	2	1	0
+mysql	1	3	2	3	0
 SET GLOBAL innodb_ft_aux_table=default;
 SELECT * FROM t1 WHERE MATCH(title) AGAINST('mysql database');
 FTS_DOC_ID	title
diff --git a/mysql-test/suite/innodb_fts/r/sync_block.result b/mysql-test/suite/innodb_fts/r/sync_block.result
index 65bee127e80..c105a3d3b12 100644
--- a/mysql-test/suite/innodb_fts/r/sync_block.result
+++ b/mysql-test/suite/innodb_fts/r/sync_block.result
@@ -30,6 +30,7 @@ connection con1;
 connection con2;
 /* conneciton con2 */ SELECT * FROM t1 WHERE MATCH(title) AGAINST('mysql database');
 FTS_DOC_ID	title
+1	mysql database
 connection default;
 # make con1 & con2 show up in mysql.slow_log
 SELECT SLEEP(2);
@@ -39,41 +40,11 @@ SLEEP(2)
 SELECT sql_text FROM mysql.slow_log WHERE query_time >= '00:00:02';
 sql_text
 INSERT INTO t1(title) VALUES('mysql database')
+SELECT * FROM t1 WHERE MATCH(title) AGAINST('mysql database')
 SET GLOBAL debug_dbug = @old_debug;
 TRUNCATE TABLE mysql.slow_log;
 DROP TABLE t1;
-# Case 2: Sync blocks DML(insert) on other tables.
-CREATE TABLE t1 (
-FTS_DOC_ID BIGINT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
-title VARCHAR(200),
-FULLTEXT(title)
-) ENGINE = InnoDB;
-CREATE TABLE t2(id INT);
-connection con1;
-SET GLOBAL debug_dbug='+d,fts_instrument_sync_request,fts_instrument_sync_sleep';
-SET DEBUG_SYNC= 'fts_instrument_sync_request SIGNAL begin WAIT_FOR continue';
-INSERT INTO t1(title) VALUES('mysql database');
-connection con2;
-SET DEBUG_SYNC= 'now WAIT_FOR begin';
-INSERT INTO t2 VALUES(1);
-connection default;
-SET DEBUG_SYNC= 'now SIGNAL continue';
-connection con1;
-/* connection con1 */ INSERT INTO t1(title) VALUES('mysql database');
-connection con2;
-/* conneciton con2 */ INSERT INTO t2 VALUES(1);
-connection default;
-SET DEBUG_SYNC = 'RESET';
-# make con1 & con2 show up in mysql.slow_log
-SELECT SLEEP(2);
-SLEEP(2)
-0
-# slow log results should be empty here.
-SELECT sql_text FROM mysql.slow_log WHERE query_time >= '00:00:02';
-sql_text
-SET GLOBAL debug_dbug = @old_debug;
-TRUNCATE TABLE mysql.slow_log;
-DROP TABLE t1,t2;
+SET DEBUG_SYNC=RESET;
 disconnect con1;
 disconnect con2;
 # Restore slow log settings.
diff --git a/mysql-test/suite/innodb_fts/t/concurrent_insert.test b/mysql-test/suite/innodb_fts/t/concurrent_insert.test
index 35debd87cea..d70fc0f63c4 100644
--- a/mysql-test/suite/innodb_fts/t/concurrent_insert.test
+++ b/mysql-test/suite/innodb_fts/t/concurrent_insert.test
@@ -31,7 +31,7 @@ INSERT INTO t2 VALUES('mariadb');
 connection default;
 SET @saved_dbug = @@GLOBAL.debug_dbug;
 SET GLOBAL debug_dbug ='+d,fts_instrument_sync_request,ib_optimize_wq_hang';
-SET DEBUG_SYNC= 'fts_instrument_sync_request
+SET DEBUG_SYNC= 'fts_sync_end
 		 SIGNAL drop_index_start WAIT_FOR sync_op';
 send INSERT INTO t1 VALUES('Keyword');
 
diff --git a/mysql-test/suite/innodb_fts/t/sync.test b/mysql-test/suite/innodb_fts/t/sync.test
index f16953ba09f..92c21c9ac83 100644
--- a/mysql-test/suite/innodb_fts/t/sync.test
+++ b/mysql-test/suite/innodb_fts/t/sync.test
@@ -26,7 +26,7 @@ connection con1;
 SET @old_dbug = @@SESSION.debug_dbug;
 SET debug_dbug = '+d,fts_instrument_sync_debug';
 
-SET DEBUG_SYNC= 'fts_write_node SIGNAL written WAIT_FOR selected';
+SET DEBUG_SYNC= 'fts_sync_end SIGNAL written WAIT_FOR selected';
 
 send INSERT INTO t1(title) VALUES('mysql database');
 
@@ -73,7 +73,7 @@ connection con1;
 
 SET debug_dbug = '+d,fts_instrument_sync_debug';
 
-SET DEBUG_SYNC= 'fts_write_node SIGNAL written WAIT_FOR inserted';
+SET DEBUG_SYNC= 'fts_sync_end SIGNAL written WAIT_FOR inserted';
 
 send INSERT INTO t1(title) VALUES('mysql database');
 
diff --git a/mysql-test/suite/innodb_fts/t/sync_block.test b/mysql-test/suite/innodb_fts/t/sync_block.test
index 895d2ba8a59..705567296f7 100644
--- a/mysql-test/suite/innodb_fts/t/sync_block.test
+++ b/mysql-test/suite/innodb_fts/t/sync_block.test
@@ -65,53 +65,7 @@ SET GLOBAL debug_dbug = @old_debug;
 TRUNCATE TABLE mysql.slow_log;
 
 DROP TABLE t1;
-
---echo # Case 2: Sync blocks DML(insert) on other tables.
-CREATE TABLE t1 (
-        FTS_DOC_ID BIGINT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
-        title VARCHAR(200),
-        FULLTEXT(title)
-) ENGINE = InnoDB;
-
-CREATE TABLE t2(id INT);
-
-connection con1;
-
-SET GLOBAL debug_dbug='+d,fts_instrument_sync_request,fts_instrument_sync_sleep';
-
-SET DEBUG_SYNC= 'fts_instrument_sync_request SIGNAL begin WAIT_FOR continue';
-
-send INSERT INTO t1(title) VALUES('mysql database');
-
-connection con2;
-
-SET DEBUG_SYNC= 'now WAIT_FOR begin';
-
-send INSERT INTO t2 VALUES(1);
-
-connection default;
-SET DEBUG_SYNC= 'now SIGNAL continue';
-
-connection con1;
---echo /* connection con1 */ INSERT INTO t1(title) VALUES('mysql database');
---reap
-
-connection con2;
---echo /* conneciton con2 */ INSERT INTO t2 VALUES(1);
---reap
-
-connection default;
-SET DEBUG_SYNC = 'RESET';
--- echo # make con1 & con2 show up in mysql.slow_log
-SELECT SLEEP(2);
--- echo # slow log results should be empty here.
-SELECT sql_text FROM mysql.slow_log WHERE query_time >= '00:00:02';
-
-SET GLOBAL debug_dbug = @old_debug;
-TRUNCATE TABLE mysql.slow_log;
-
-DROP TABLE t1,t2;
-
+SET DEBUG_SYNC=RESET;
 disconnect con1;
 disconnect con2;
 
diff --git a/mysql-test/suite/parts/inc/part_alter_values.inc b/mysql-test/suite/parts/inc/part_alter_values.inc
index ca18faa5758..d3b63a4610f 100644
--- a/mysql-test/suite/parts/inc/part_alter_values.inc
+++ b/mysql-test/suite/parts/inc/part_alter_values.inc
@@ -78,3 +78,11 @@ if (`SELECT IF('$engine' != 'InnoDB', 1, 0)`)
 
 --remove_files_wildcard $MYSQLTEST_VARDIR/tmp/mdev_27065 *
 --rmdir $MYSQLTEST_VARDIR/tmp/mdev_27065
+
+--echo #
+--echo # MDEV-26127 Assertion `err != DB_DUPLICATE_KEY' failed or InnoDB: Failing assertion: id != 0 on ALTER ... REBUILD PARTITION
+--echo #
+--eval CREATE TABLE t1 (c INT) ENGINE=$engine PARTITION BY KEY(c) PARTITIONS 4;
+LOCK TABLES t1 WRITE, t1 AS a READ;
+ALTER TABLE t1 REBUILD PARTITION p0;
+DROP TABLE t1;
diff --git a/mysql-test/suite/parts/r/partition_alter_innodb.result b/mysql-test/suite/parts/r/partition_alter_innodb.result
index 33429980737..05237cfadca 100644
--- a/mysql-test/suite/parts/r/partition_alter_innodb.result
+++ b/mysql-test/suite/parts/r/partition_alter_innodb.result
@@ -62,6 +62,13 @@ Warnings:
 Warning	1618	<DATA DIRECTORY> table option of old schema is ignored
 DROP TABLE t1;
 #
+# MDEV-26127 Assertion `err != DB_DUPLICATE_KEY' failed or InnoDB: Failing assertion: id != 0 on ALTER ... REBUILD PARTITION
+#
+CREATE TABLE t1 (c INT) ENGINE=InnoDB PARTITION BY KEY(c) PARTITIONS 4;;
+LOCK TABLES t1 WRITE, t1 AS a READ;
+ALTER TABLE t1 REBUILD PARTITION p0;
+DROP TABLE t1;
+#
 # MDEV-28079 Shutdown hangs after altering innodb partition fts table
 #
 CREATE TABLE t1(f1 INT, f2 CHAR(100))ENGINE=InnoDB PARTITION BY HASH(f1) PARTITIONS 2;
diff --git a/mysql-test/suite/parts/r/partition_alter_maria.result b/mysql-test/suite/parts/r/partition_alter_maria.result
index 358ffbdfbe7..eca8378430f 100644
--- a/mysql-test/suite/parts/r/partition_alter_maria.result
+++ b/mysql-test/suite/parts/r/partition_alter_maria.result
@@ -95,3 +95,10 @@ PARTITION p1 VALUES LESS THAN MAXVALUE
 Warnings:
 Warning	1618	<INDEX DIRECTORY> table option of old schema is ignored
 DROP TABLE t2;
+#
+# MDEV-26127 Assertion `err != DB_DUPLICATE_KEY' failed or InnoDB: Failing assertion: id != 0 on ALTER ... REBUILD PARTITION
+#
+CREATE TABLE t1 (c INT) ENGINE=Aria PARTITION BY KEY(c) PARTITIONS 4;;
+LOCK TABLES t1 WRITE, t1 AS a READ;
+ALTER TABLE t1 REBUILD PARTITION p0;
+DROP TABLE t1;
diff --git a/mysql-test/suite/parts/r/partition_alter_myisam.result b/mysql-test/suite/parts/r/partition_alter_myisam.result
index 9d76881fdfa..ba1a0fe05c4 100644
--- a/mysql-test/suite/parts/r/partition_alter_myisam.result
+++ b/mysql-test/suite/parts/r/partition_alter_myisam.result
@@ -68,6 +68,13 @@ PARTITION p1 VALUES LESS THAN MAXVALUE
 Warnings:
 Warning	1618	<INDEX DIRECTORY> table option of old schema is ignored
 DROP TABLE t2;
+#
+# MDEV-26127 Assertion `err != DB_DUPLICATE_KEY' failed or InnoDB: Failing assertion: id != 0 on ALTER ... REBUILD PARTITION
+#
+CREATE TABLE t1 (c INT) ENGINE=MyISAM PARTITION BY KEY(c) PARTITIONS 4;;
+LOCK TABLES t1 WRITE, t1 AS a READ;
+ALTER TABLE t1 REBUILD PARTITION p0;
+DROP TABLE t1;
 create table t1 ( c1 int, c2 int, c3 varchar(100)) delay_key_write=1
 partition by key(c1) (
 partition p01 data directory = 'MYSQL_TMP_DIR'
diff --git a/sql/sql_partition.cc b/sql/sql_partition.cc
index 39e57baa510..80b4cdcd240 100644
--- a/sql/sql_partition.cc
+++ b/sql/sql_partition.cc
@@ -1,5 +1,5 @@
 /* Copyright (c) 2005, 2017, Oracle and/or its affiliates.
-   Copyright (c) 2009, 2020, MariaDB
+   Copyright (c) 2009, 2022, MariaDB
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -6969,16 +6969,33 @@ static bool alter_partition_lock_handling(ALTER_PARTITION_PARAM_TYPE *lpt)
 
 static int alter_close_table(ALTER_PARTITION_PARAM_TYPE *lpt)
 {
-  int error= 0;
+  THD *thd= lpt->thd;
+  TABLE_SHARE *share= lpt->table->s;
   DBUG_ENTER("alter_close_table");
 
-  if (lpt->table->db_stat)
-  {
-    error= mysql_lock_remove(lpt->thd, lpt->thd->lock, lpt->table);
-    error= lpt->table->file->ha_close();
-    lpt->table->db_stat= 0;                        // Mark file closed
-  }
-  DBUG_RETURN(error);
+  TABLE *table= thd->open_tables;
+  do {
+    table= find_locked_table(table, share->db.str, share->table_name.str);
+    if (!table)
+    {
+      DBUG_RETURN(0);
+    }
+
+    if (table->db_stat)
+    {
+      if (int error= mysql_lock_remove(thd, thd->lock, table))
+      {
+        DBUG_RETURN(error);
+      }
+      if (int error= table->file->ha_close())
+      {
+        DBUG_RETURN(error);
+      }
+      table->db_stat= 0; // Mark file closed
+    }
+  } while ((table= table->next));
+
+  DBUG_RETURN(0);
 }
 
 
diff --git a/storage/innobase/buf/buf0flu.cc b/storage/innobase/buf/buf0flu.cc
index c35cda65798..a9b1a359f0e 100644
--- a/storage/innobase/buf/buf0flu.cc
+++ b/storage/innobase/buf/buf0flu.cc
@@ -1236,7 +1236,6 @@ static void buf_flush_LRU_list_batch(ulint max, flush_counters_t *n)
          n->flushed + n->evicted < max) ||
         recv_recovery_is_on()); ++scanned)
   {
-  retry:
     buf_page_t *prev= UT_LIST_GET_PREV(LRU, bpage);
     const lsn_t oldest_modification= bpage->oldest_modification();
     buf_pool.lru_hp.set(prev);
@@ -1272,7 +1271,6 @@ static void buf_flush_LRU_list_batch(ulint max, flush_counters_t *n)
           mysql_mutex_lock(&buf_pool.mutex);
           if (p.second)
             buf_pool.stat.n_pages_written+= p.second;
-          bpage= buf_pool.lru_hp.get();
           goto retry;
         }
         else
@@ -1304,6 +1302,7 @@ reacquire_mutex:
     must_skip:
       /* Can't evict or dispatch this block. Go to previous. */
       ut_ad(buf_pool.lru_hp.is_hp(prev));
+  retry:
     bpage= buf_pool.lru_hp.get();
   }
 
diff --git a/storage/innobase/fts/fts0fts.cc b/storage/innobase/fts/fts0fts.cc
index 0a82dc39303..afbb904d5c5 100644
--- a/storage/innobase/fts/fts0fts.cc
+++ b/storage/innobase/fts/fts0fts.cc
@@ -38,6 +38,22 @@ Full Text Search interface
 #include "dict0stats.h"
 #include "btr0pcur.h"
 
+/** The SYNC state of the cache. There is one instance of this struct
+associated with each ADD thread. */
+struct fts_sync_t {
+        /** Transaction used for SYNCing the cache to disk */
+        trx_t   *trx;
+        /** Table with FTS index(es) */
+        dict_table_t    *table;
+        /** Max size in bytes of the cache */
+        ulint           max_cache_size;
+        /** The doc id at which the cache was noted as being
+        full, we use this to set the upper_limit field */
+        doc_id_t        max_doc_id;
+        /** SYNC start time; only used if fts_enable_diag_print */
+        time_t          start_time;
+};
+
 static const ulint FTS_MAX_ID_LEN = 32;
 
 /** Column name from the FTS config table */
@@ -185,15 +201,8 @@ struct fts_tokenize_param_t {
 /** Run SYNC on the table, i.e., write out data from the cache to the
 FTS auxiliary INDEX table and clear the cache at the end.
 @param[in,out]	sync		sync state
-@param[in]	unlock_cache	whether unlock cache lock when write node
-@param[in]	wait		whether wait when a sync is in progress
 @return DB_SUCCESS if all OK */
-static
-dberr_t
-fts_sync(
-	fts_sync_t*	sync,
-	bool		unlock_cache,
-	bool		wait);
+static dberr_t fts_sync(fts_sync_t *sync);
 
 /****************************************************************//**
 Release all resources help by the words rb tree e.g., the node ilist. */
@@ -266,7 +275,6 @@ fts_cache_destroy(fts_cache_t* cache)
 	mysql_mutex_destroy(&cache->init_lock);
 	mysql_mutex_destroy(&cache->deleted_lock);
 	mysql_mutex_destroy(&cache->doc_id_lock);
-	pthread_cond_destroy(&cache->sync->cond);
 
 	if (cache->stopword_info.cached_stopword) {
 		rbt_free(cache->stopword_info.cached_stopword);
@@ -540,7 +548,6 @@ fts_index_cache_init(
 
 	for (i = 0; i < FTS_NUM_AUX_INDEX; ++i) {
 		ut_a(index_cache->ins_graph[i] == NULL);
-		ut_a(index_cache->sel_graph[i] == NULL);
 	}
 }
 
@@ -610,7 +617,6 @@ fts_cache_create(
 		mem_heap_zalloc(heap, sizeof(fts_sync_t)));
 
 	cache->sync->table = table;
-	pthread_cond_init(&cache->sync->cond, nullptr);
 
 	/* Create the index cache vector that will hold the inverted indexes. */
 	cache->indexes = ib_vector_create(
@@ -935,10 +941,6 @@ fts_cache_index_cache_create(
 		mem_heap_zalloc(static_cast<mem_heap_t*>(
 			cache->self_heap->arg), n_bytes));
 
-	index_cache->sel_graph = static_cast<que_t**>(
-		mem_heap_zalloc(static_cast<mem_heap_t*>(
-			cache->self_heap->arg), n_bytes));
-
 	fts_index_cache_init(cache->sync_heap, index_cache);
 
 	if (cache->get_docs) {
@@ -1012,13 +1014,6 @@ fts_cache_clear(
 
 				index_cache->ins_graph[j] = NULL;
 			}
-
-			if (index_cache->sel_graph[j] != NULL) {
-
-				que_graph_free(index_cache->sel_graph[j]);
-
-				index_cache->sel_graph[j] = NULL;
-			}
 		}
 
 		index_cache->doc_stats = NULL;
@@ -1311,8 +1306,7 @@ fts_cache_add_doc(
 				ib_vector_last(word->nodes));
 		}
 
-		if (fts_node == NULL || fts_node->synced
-		    || fts_node->ilist_size > FTS_ILIST_MAX_SIZE
+		if (!fts_node || fts_node->ilist_size > FTS_ILIST_MAX_SIZE
 		    || doc_id < fts_node->last_doc_id) {
 
 			fts_node = static_cast<fts_node_t*>(
@@ -3284,7 +3278,7 @@ fts_add_doc_from_tuple(
 
                        if (cache->total_size > fts_max_cache_size / 5
                            || fts_need_sync) {
-                               fts_sync(cache->sync, true, false);
+                               fts_sync(cache->sync);
                        }
 
                        mtr_start(&mtr);
@@ -3444,42 +3438,34 @@ fts_add_doc_by_id(
 					get_doc->index_cache,
 					doc_id, doc.tokens);
 
-				bool	need_sync = !cache->sync->in_progress
-					&& (fts_need_sync
-					    || (cache->total_size
-						- cache->total_size_at_sync)
-					    > fts_max_cache_size / 10);
-				if (need_sync) {
-					cache->total_size_at_sync =
-						cache->total_size;
-				}
+				/** FTS cache sync should happen
+				frequently. Because user thread
+				shouldn't hold the cache lock for
+				longer time. So cache should sync
+				whenever cache size exceeds 512 KB */
+				bool	need_sync =
+					cache->total_size > 512*1024;
 
 				mysql_mutex_unlock(&table->fts->cache->lock);
 
 				DBUG_EXECUTE_IF(
 					"fts_instrument_sync",
-					fts_optimize_request_sync_table(table);
-					mysql_mutex_lock(&cache->lock);
-					if (cache->sync->in_progress)
-						my_cond_wait(
-							&cache->sync->cond,
-							&cache->lock.m_mutex);
-					mysql_mutex_unlock(&cache->lock);
+					fts_sync_table(table);
 				);
 
 				DBUG_EXECUTE_IF(
 					"fts_instrument_sync_debug",
-					fts_sync(cache->sync, true, true);
+					fts_sync(cache->sync);
 				);
 
 				DEBUG_SYNC_C("fts_instrument_sync_request");
 				DBUG_EXECUTE_IF(
 					"fts_instrument_sync_request",
-					fts_optimize_request_sync_table(table);
+					need_sync= true;
 				);
 
 				if (need_sync) {
-					fts_optimize_request_sync_table(table);
+					fts_sync_table(table);
 				}
 
 				mtr_start(&mtr);
@@ -3846,15 +3832,13 @@ static MY_ATTRIBUTE((nonnull, warn_unused_result))
 dberr_t
 fts_sync_write_words(
 	trx_t*			trx,
-	fts_index_cache_t*	index_cache,
-	bool			unlock_cache)
+	fts_index_cache_t*	index_cache)
 {
 	fts_table_t	fts_table;
 	ulint		n_nodes = 0;
 	ulint		n_words = 0;
 	const ib_rbt_node_t* rbt_node;
 	dberr_t		error = DB_SUCCESS;
-	ibool		print_error = FALSE;
 	dict_table_t*	table = index_cache->index->table;
 
 	FTS_INIT_INDEX_TABLE(
@@ -3885,53 +3869,35 @@ fts_sync_write_words(
 
 		fts_table.suffix = fts_get_suffix(selected);
 
-		/* We iterate over all the nodes even if there was an error */
 		for (i = 0; i < ib_vector_size(word->nodes); ++i) {
 
 			fts_node_t* fts_node = static_cast<fts_node_t*>(
 				ib_vector_get(word->nodes, i));
 
-			if (fts_node->synced) {
-				continue;
-			} else {
-				fts_node->synced = true;
-			}
-
-			/*FIXME: we need to handle the error properly. */
-			if (error == DB_SUCCESS) {
-				if (unlock_cache) {
-					mysql_mutex_unlock(
-						&table->fts->cache->lock);
-				}
-
-				error = fts_write_node(
-					trx,
-					&index_cache->ins_graph[selected],
-					&fts_table, &word->text, fts_node);
+			error = fts_write_node(
+				trx, &index_cache->ins_graph[selected],
+				&fts_table, &word->text, fts_node);
 
-				DEBUG_SYNC_C("fts_write_node");
-				DBUG_EXECUTE_IF("fts_write_node_crash",
+			DEBUG_SYNC_C("fts_write_node");
+			DBUG_EXECUTE_IF("fts_write_node_crash",
 					DBUG_SUICIDE(););
 
-				DBUG_EXECUTE_IF(
-					"fts_instrument_sync_sleep",
+			DBUG_EXECUTE_IF("fts_instrument_sync_sleep",
 					std::this_thread::sleep_for(
 						std::chrono::seconds(1)););
 
-				if (unlock_cache) {
-					mysql_mutex_lock(
-						&table->fts->cache->lock);
-				}
+			if (error != DB_SUCCESS) {
+				goto err_exit;
 			}
 		}
 
 		n_nodes += ib_vector_size(word->nodes);
 
-		if (UNIV_UNLIKELY(error != DB_SUCCESS) && !print_error) {
+		if (UNIV_UNLIKELY(error != DB_SUCCESS)) {
+err_exit:
 			ib::error() << "(" << error << ") writing"
 				" word node to FTS auxiliary index table "
 				<< table->name;
-			print_error = TRUE;
 		}
 	}
 
@@ -3990,58 +3956,7 @@ fts_sync_index(
 
 	ut_ad(rbt_validate(index_cache->words));
 
-	return(fts_sync_write_words(trx, index_cache, sync->unlock_cache));
-}
-
-/** Check if index cache has been synced completely
-@param[in,out]	index_cache	index cache
-@return true if index is synced, otherwise false. */
-static
-bool
-fts_sync_index_check(
-	fts_index_cache_t*	index_cache)
-{
-	const ib_rbt_node_t*	rbt_node;
-
-	for (rbt_node = rbt_first(index_cache->words);
-	     rbt_node != NULL;
-	     rbt_node = rbt_next(index_cache->words, rbt_node)) {
-
-		fts_tokenizer_word_t*	word;
-		word = rbt_value(fts_tokenizer_word_t, rbt_node);
-
-		fts_node_t*	fts_node;
-		fts_node = static_cast<fts_node_t*>(ib_vector_last(word->nodes));
-
-		if (!fts_node->synced) {
-			return(false);
-		}
-	}
-
-	return(true);
-}
-
-/** Reset synced flag in index cache when rollback
-@param[in,out]	index_cache	index cache */
-static
-void
-fts_sync_index_reset(
-	fts_index_cache_t*	index_cache)
-{
-	const ib_rbt_node_t*	rbt_node;
-
-	for (rbt_node = rbt_first(index_cache->words);
-	     rbt_node != NULL;
-	     rbt_node = rbt_next(index_cache->words, rbt_node)) {
-
-		fts_tokenizer_word_t*	word;
-		word = rbt_value(fts_tokenizer_word_t, rbt_node);
-
-		fts_node_t*	fts_node;
-		fts_node = static_cast<fts_node_t*>(ib_vector_last(word->nodes));
-
-		fts_node->synced = false;
-	}
+	return(fts_sync_write_words(trx, index_cache));
 }
 
 /** Commit the SYNC, change state of processed doc ids etc.
@@ -4074,14 +3989,14 @@ fts_sync_commit(
 			sync, cache->deleted_doc_ids);
 	}
 
-	/* We need to do this within the deleted lock since fts_delete() can
-	attempt to add a deleted doc id to the cache deleted id array. */
-	fts_cache_clear(cache);
-	DEBUG_SYNC_C("fts_deleted_doc_ids_clear");
-	fts_cache_init(cache);
-	mysql_mutex_unlock(&cache->lock);
-
 	if (UNIV_LIKELY(error == DB_SUCCESS)) {
+		/* We need to do this within the deleted lock
+		since fts_delete() can attempt to add a deleted
+		doc id to the cache deleted id array. */
+		fts_cache_clear(cache);
+		DEBUG_SYNC_C("fts_deleted_doc_ids_clear");
+		fts_cache_init(cache);
+		mysql_mutex_unlock(&cache->lock);
 		fts_sql_commit(trx);
 	} else {
 		fts_sql_rollback(trx);
@@ -4123,10 +4038,6 @@ fts_sync_rollback(
 		index_cache = static_cast<fts_index_cache_t*>(
 			ib_vector_get(cache->indexes, i));
 
-		/* Reset synced flag so nodes will not be skipped
-		in the next sync, see fts_sync_write_words(). */
-		fts_sync_index_reset(index_cache);
-
 		for (j = 0; fts_index_selector[j].value; ++j) {
 
 			if (index_cache->ins_graph[j] != NULL) {
@@ -4135,13 +4046,6 @@ fts_sync_rollback(
 
 				index_cache->ins_graph[j] = NULL;
 			}
-
-			if (index_cache->sel_graph[j] != NULL) {
-
-				que_graph_free(index_cache->sel_graph[j]);
-
-				index_cache->sel_graph[j] = NULL;
-			}
 		}
 	}
 
@@ -4160,12 +4064,7 @@ FTS auxiliary INDEX table and clear the cache at the end.
 @param[in]	unlock_cache	whether unlock cache lock when write node
 @param[in]	wait		whether wait when a sync is in progress
 @return DB_SUCCESS if all OK */
-static
-dberr_t
-fts_sync(
-	fts_sync_t*	sync,
-	bool		unlock_cache,
-	bool		wait)
+static dberr_t fts_sync(fts_sync_t *sync)
 {
 	if (srv_read_only_mode) {
 		return DB_READ_ONLY;
@@ -4176,33 +4075,13 @@ fts_sync(
 	fts_cache_t*	cache = sync->table->fts->cache;
 
 	mysql_mutex_lock(&cache->lock);
-
-	/* Check if cache is being synced.
-	Note: we release cache lock in fts_sync_write_words() to
-	avoid long wait for the lock by other threads. */
-	if (sync->in_progress) {
-		if (!wait) {
-			mysql_mutex_unlock(&cache->lock);
-			return(DB_SUCCESS);
-		}
-		do {
-			my_cond_wait(&sync->cond, &cache->lock.m_mutex);
-		} while (sync->in_progress);
-	}
-
-	sync->unlock_cache = unlock_cache;
-	sync->in_progress = true;
-
 	DEBUG_SYNC_C("fts_sync_begin");
 	fts_sync_begin(sync);
 
-begin_sync:
 	const size_t fts_cache_size= fts_max_cache_size;
 	if (cache->total_size > fts_cache_size) {
 		/* Avoid the case: sync never finish when
 		insert/update keeps comming. */
-		ut_ad(sync->unlock_cache);
-		sync->unlock_cache = false;
 		ib::warn() << "Total InnoDB FTS size "
 			<< cache->total_size << " for the table "
 			<< cache->sync->table->name
@@ -4226,52 +4105,23 @@ begin_sync:
 		error = fts_sync_index(sync, index_cache);
 
 		if (error != DB_SUCCESS) {
-			goto end_sync;
-		}
-
-		if (!sync->unlock_cache
-		    && cache->total_size < fts_max_cache_size) {
-			/* Reset the unlock cache if the value
-			is less than innodb_ft_cache_size */
-			sync->unlock_cache = true;
+			goto err_exit;
 		}
 	}
 
 	DBUG_EXECUTE_IF("fts_instrument_sync_interrupted",
-			sync->interrupted = true;
 			error = DB_INTERRUPTED;
-			goto end_sync;
+			goto err_exit;
 	);
 
-	/* Make sure all the caches are synced. */
-	for (i = 0; i < ib_vector_size(cache->indexes); ++i) {
-		fts_index_cache_t*	index_cache;
-
-		index_cache = static_cast<fts_index_cache_t*>(
-			ib_vector_get(cache->indexes, i));
-
-		if (index_cache->index->to_be_dropped
-		    || fts_sync_index_check(index_cache)) {
-			continue;
-		}
-
-		goto begin_sync;
-	}
-
-end_sync:
-	if (error == DB_SUCCESS && !sync->interrupted) {
+	if (error == DB_SUCCESS) {
 		error = fts_sync_commit(sync);
 	} else {
+err_exit:
 		fts_sync_rollback(sync);
+		return error;
 	}
 
-	mysql_mutex_lock(&cache->lock);
-	ut_ad(sync->in_progress);
-	sync->interrupted = false;
-	sync->in_progress = false;
-	pthread_cond_broadcast(&sync->cond);
-	mysql_mutex_unlock(&cache->lock);
-
 	/* We need to check whether an optimize is required, for that
 	we make copies of the two variables that control the trigger. These
 	variables can change behind our back and we don't want to hold the
@@ -4283,6 +4133,7 @@ end_sync:
 
 	mysql_mutex_unlock(&cache->deleted_lock);
 
+	DEBUG_SYNC_C("fts_sync_end");
 	return(error);
 }
 
@@ -4291,12 +4142,12 @@ FTS auxiliary INDEX table and clear the cache at the end.
 @param[in,out]	table		fts table
 @param[in]	wait		whether wait for existing sync to finish
 @return DB_SUCCESS on success, error code on failure. */
-dberr_t fts_sync_table(dict_table_t* table, bool wait)
+dberr_t fts_sync_table(dict_table_t* table)
 {
   ut_ad(table->fts);
 
   return table->space && !table->corrupted && table->fts->cache
-    ? fts_sync(table->fts->cache->sync, !wait, wait)
+    ? fts_sync(table->fts->cache->sync)
     : DB_SUCCESS;
 }
 
diff --git a/storage/innobase/fts/fts0opt.cc b/storage/innobase/fts/fts0opt.cc
index 030dc438193..9cc56f184fd 100644
--- a/storage/innobase/fts/fts0opt.cc
+++ b/storage/innobase/fts/fts0opt.cc
@@ -83,9 +83,8 @@ enum fts_msg_type_t {
 	FTS_MSG_ADD_TABLE,		/*!< Add table to the optimize thread's
 					work queue */
 
-	FTS_MSG_DEL_TABLE,		/*!< Remove a table from the optimize
+	FTS_MSG_DEL_TABLE		/*!< Remove a table from the optimize
 					threads work queue */
-	FTS_MSG_SYNC_TABLE		/*!< Sync fts cache of a table */
 };
 
 /** Compressed list of words that have been read from FTS INDEX
@@ -2625,36 +2624,6 @@ fts_optimize_remove_table(
   mysql_mutex_unlock(&fts_optimize_wq->mutex);
 }
 
-/** Send sync fts cache for the table.
-@param[in]	table	table to sync */
-void
-fts_optimize_request_sync_table(
-	dict_table_t*	table)
-{
-	/* if the optimize system not yet initialized, return */
-	if (!fts_optimize_wq) {
-		return;
-	}
-
-	mysql_mutex_lock(&fts_optimize_wq->mutex);
-
-	/* FTS optimizer thread is already exited */
-	if (fts_opt_start_shutdown) {
-		ib::info() << "Try to sync table " << table->name
-			<< " after FTS optimize thread exiting.";
-	} else if (table->fts->sync_message) {
-		/* If the table already has SYNC message in
-		fts_optimize_wq queue then ignore it */
-	} else {
-		add_msg(fts_optimize_create_msg(FTS_MSG_SYNC_TABLE, table));
-		table->fts->sync_message = true;
-		DBUG_EXECUTE_IF("fts_optimize_wq_count_check",
-				DBUG_ASSERT(fts_optimize_wq->length <= 1000););
-	}
-
-	mysql_mutex_unlock(&fts_optimize_wq->mutex);
-}
-
 /** Add a table to fts_slots if it doesn't already exist. */
 static bool fts_optimize_new_table(dict_table_t* table)
 {
@@ -2796,7 +2765,8 @@ static void fts_optimize_sync_table(dict_table_t *table,
 
   if (sync_table->fts && sync_table->fts->cache && sync_table->is_accessible())
   {
-    fts_sync_table(sync_table, false);
+    fts_sync_table(sync_table);
+
     if (process_message)
     {
       mysql_mutex_lock(&fts_optimize_wq->mutex);
@@ -2896,24 +2866,6 @@ retry_later:
 					--n_tables;
 				}
 				break;
-
-			case FTS_MSG_SYNC_TABLE:
-				if (UNIV_UNLIKELY(wsrep_sst_disable_writes)) {
-					add_msg(msg);
-					goto retry_later;
-				}
-
-				DBUG_EXECUTE_IF(
-					"fts_instrument_msg_sync_sleep",
-					std::this_thread::sleep_for(
-						std::chrono::milliseconds(
-							300)););
-
-				fts_optimize_sync_table(
-					static_cast<dict_table_t*>(msg->ptr),
-					true);
-				break;
-
 			default:
 				ut_error;
 			}
@@ -3046,7 +2998,7 @@ void fts_sync_during_ddl(dict_table_t* table)
   if (!sync_message)
     return;
 
-  fts_sync_table(table, false);
+  fts_sync_table(table);
 
   mysql_mutex_lock(&fts_optimize_wq->mutex);
   table->fts->sync_message = false;
diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc
index 85e88cf8ce7..faccc83cef4 100644
--- a/storage/innobase/handler/ha_innodb.cc
+++ b/storage/innobase/handler/ha_innodb.cc
@@ -1476,7 +1476,8 @@ static void innodb_drop_database(handlerton*, char *path)
     "WHILE 1 = 1 LOOP\n"
     "  FETCH tab INTO tid,name;\n"
     "  IF (SQL % NOTFOUND) THEN EXIT; END IF;\n"
-    "  IF SUBSTR(name, 0, LENGTH(:db)) <> :db THEN EXIT; END IF;\n"
+    "  IF TO_BINARY(SUBSTR(name, 0, LENGTH(:db))) <> TO_BINARY(:db)"
+    " THEN EXIT; END IF;\n"
     "  DELETE FROM SYS_COLUMNS WHERE TABLE_ID=tid;\n"
     "  DELETE FROM SYS_TABLES WHERE ID=tid;\n"
     "  OPEN idx;\n"
diff --git a/storage/innobase/handler/handler0alter.cc b/storage/innobase/handler/handler0alter.cc
index ef7207949f3..0b69bdb9d09 100644
--- a/storage/innobase/handler/handler0alter.cc
+++ b/storage/innobase/handler/handler0alter.cc
@@ -11415,12 +11415,8 @@ foreign_fail:
 		ut_d(dict_table_check_for_dup_indexes(
 			     ctx->new_table, CHECK_ABORTED_OK));
 
-#ifdef UNIV_DEBUG
-		if (!(ctx->new_table->fts != NULL
-			&& ctx->new_table->fts->cache->sync->in_progress)) {
-			ut_a(fts_check_cached_index(ctx->new_table));
-		}
-#endif
+		ut_ad(!ctx->new_table->fts
+		      || fts_check_cached_index(ctx->new_table));
 	}
 
 	unlock_and_close_files(deleted, trx);
diff --git a/storage/innobase/include/fts0fts.h b/storage/innobase/include/fts0fts.h
index 774221dd208..043a464dd30 100644
--- a/storage/innobase/include/fts0fts.h
+++ b/storage/innobase/include/fts0fts.h
@@ -656,12 +656,6 @@ fts_optimize_remove_table(
 void
 fts_optimize_shutdown();
 
-/** Send sync fts cache for the table.
-@param[in]	table	table to sync */
-void
-fts_optimize_request_sync_table(
-	dict_table_t*	table);
-
 /**********************************************************************//**
 Take a FTS savepoint. */
 void
@@ -716,9 +710,8 @@ fts_savepoint_rollback_last_stmt(
 /** Run SYNC on the table, i.e., write out data from the cache to the
 FTS auxiliary INDEX table and clear the cache at the end.
 @param[in,out]	table		fts table
-@param[in]	wait		whether to wait for existing sync to finish
 @return DB_SUCCESS on success, error code on failure. */
-dberr_t fts_sync_table(dict_table_t* table, bool wait = true);
+dberr_t fts_sync_table(dict_table_t* table);
 
 /****************************************************************//**
 Create an FTS index cache. */
diff --git a/storage/innobase/include/fts0types.h b/storage/innobase/include/fts0types.h
index fb278d543c4..04e99d595c5 100644
--- a/storage/innobase/include/fts0types.h
+++ b/storage/innobase/include/fts0types.h
@@ -75,7 +75,6 @@ struct fts_index_cache_t {
 
 	que_t**		ins_graph;	/*!< Insert query graphs */
 
-	que_t**		sel_graph;	/*!< Select query graphs */
 	CHARSET_INFO*	charset;	/*!< charset */
 };
 
@@ -87,35 +86,7 @@ struct fts_stopword_t {
 	CHARSET_INFO*	charset;	/*!< charset for stopword */
 };
 
-/** The SYNC state of the cache. There is one instance of this struct
-associated with each ADD thread. */
-struct fts_sync_t {
-	trx_t*		trx;		/*!< The transaction used for SYNCing
-					the cache to disk */
-	dict_table_t*	table;		/*!< Table with FTS index(es) */
-	ulint		max_cache_size;	/*!< Max size in bytes of the cache */
-	ibool		cache_full;	/*!< flag, when true it indicates that
-					we need to sync the cache to disk */
-	ulint		lower_index;	/*!< the start index of the doc id
-					vector from where to start adding
-					documents to the FTS cache */
-	ulint		upper_index;	/*!< max index of the doc id vector to
-					add to the FTS cache */
-	ibool		interrupted;	/*!< TRUE if SYNC was interrupted */
-	doc_id_t	min_doc_id;	/*!< The smallest doc id added to the
-					cache. It should equal to
-					doc_ids[lower_index] */
-	doc_id_t	max_doc_id;	/*!< The doc id at which the cache was
-					noted as being full, we use this to
-					set the upper_limit field */
-	time_t		start_time;	/*!< SYNC start time; only used if
-					fts_enable_diag_print */
-	bool		in_progress;	/*!< flag whether sync is in progress.*/
-	bool		unlock_cache;	/*!< flag whether unlock cache when
-					write fts node */
-  /** condition variable for in_progress; used with table->fts->cache->lock */
-  pthread_cond_t cond;
-};
+struct fts_sync_t;
 
 /** The cache for the FTS system. It is a memory-based inverted index
 that new entries are added to, until it grows over the configured maximum
@@ -204,7 +175,6 @@ struct fts_node_t {
 	ulint		ilist_size_alloc;
 					/*!< Allocated size of ilist in
 					bytes */
-	bool		synced;		/*!< flag whether the node is synced */
 };
 
 /** A tokenizer word. Contains information about one word. */
diff --git a/support-files/magic b/support-files/magic
index b3f3b3ea29d..accc3999ddb 100644
--- a/support-files/magic
+++ b/support-files/magic
@@ -1,26 +1,26 @@
 #
 # Add the following to the end of your /etc/magic file to get the 'file'
-# command to recognize some MySQL files.
+# command to recognize some MariaDB / MySQL files.
 #
-0       beshort           0xfe01        MySQL table definition file
+0       beshort           0xfe01        MariaDB/MySQL table definition file
 >2      byte            x               Version %d
-0       belong&0xffffff00 0xfefe0700    MySQL MyISAM index file
+0       belong&0xffffff00 0xfefe0700    MariaDB/MySQL MyISAM index file
 >3      byte            x               Version %d
-0       belong&0xffffff00 0xfefe0800    MySQL MyISAM compressed data file
+0       belong&0xffffff00 0xfefe0800    MariaDB/MySQL MyISAM compressed data file
 >3      byte            x               Version %d
-0       belong&0xffffff00 0xfefe0900    MySQL Maria index file
+0       belong&0xffffff00 0xfefe0900    MariaDB Aaria index file
 >3      byte            x               Version %d
-0       belong&0xffffff00 0xfefe0A00    MySQL Maria compressed data file
+0       belong&0xffffff00 0xfefe0A00    MariaDB Aaria compressed data file
 >3      byte            x               Version %d
-0       belong&0xffffff00 0xfefe0500    MySQL ISAM index file
+0       belong&0xffffff00 0xfefe0500    MariaDB/MySQL ISAM index file
 >3      byte            x               Version %d
-0       belong&0xffffff00 0xfefe0600    MySQL ISAM compressed data file
+0       belong&0xffffff00 0xfefe0600    MariaDB/MySQL ISAM compressed data file
 >3      byte            x               Version %d
-0       string           \376bin        MySQL replication log
+0       string           \376bin        MariaDB/MySQL replication log
 0       belong&0xffffff00 0xfefe0b00
->4      string          MARIALOG        MySQL Maria transaction log file
+>4      string          MARIALOG        MariaDB Aria transaction log file
 >>3     byte            x               Version %d
-0       belong&0xffffff00 0xfefe0c00
->4      string          MACF            MySQL Maria control file
->>3     byte            x               Version %d
-
+0       belong&0xffffff00 0xfefe0c00    MariaDB Aria control file
+>3      byte            x               Version %d
+0       belong&0xffffff00 0xfefe0b00    MariaDB DDL recovery log
+>3      byte            x               Version %d