MDEV-26664 Store UUIDs in a more efficient mannerbb-10.7-bar-uuid

UUID values llllllll-mmmm-Vhhh-vsss-nnnnnnnnnnnn are now stored as nnnnnnnnnnnn-vsss-Vhhh-mmmm-llllllll inside the record: - the groups (segments separated by dash) are reordered right-to-left. - the bytes inside the groups are not reordered (stored as before, in big-endian format). This provides a better sorting order: the earlier UUID was generated, the higher it appears in the ORDER BY output. Also, this change enables a good key prefix compression, because the constant part is now in the beginning, while the non-constant part (the timestamp) is in the end.
author: Alexander Barkov <bar@mariadb.com> 2021-10-19 13:17:11 +0400
committer: Alexander Barkov <bar@mariadb.com> 2021-10-22 13:52:52 +0400
commit: d2427bc0f5339cef7e6ca831d859780f248ed649 (patch)
tree: 89691ef56966101e649d21d57ab41ec930def769
parent: 5cfb31854a4b28385d7e4940f297616042b0f345 (diff)
download: mariadb-git-bb-10.7-bar-uuid.tar.gz
15 files changed, 3601 insertions, 36 deletions
diff --git a/plugin/type_uuid/mysql-test/type_uuid/std_data/t1nopackkey.frm b/plugin/type_uuid/mysql-test/type_uuid/std_data/t1nopackkey.frm
new file mode 100644
index 00000000000..ca934198cf7
--- /dev/null
+++ b/plugin/type_uuid/mysql-test/type_uuid/std_data/t1nopackkey.frm
diff --git a/plugin/type_uuid/mysql-test/type_uuid/std_data/t1packkey.frm b/plugin/type_uuid/mysql-test/type_uuid/std_data/t1packkey.frm
new file mode 100644
index 00000000000..b3d8e433e9d
--- /dev/null
+++ b/plugin/type_uuid/mysql-test/type_uuid/std_data/t1packkey.frm
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid.result b/plugin/type_uuid/mysql-test/type_uuid/type_uuid.result
index 6a08ffe8c23..615222651a5 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid.result
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid.result
@@ -369,6 +369,1069 @@ SELECT * FROM t1 WHERE a IN ('::', 10);
 ERROR HY000: Illegal parameter data types uuid and int for operation 'in'
 DROP TABLE t1;
 #
+# ORDER BY
+#
+CREATE TABLE t1 (a UUID);
+FOR i IN 0..15
+DO
+INSERT INTO t1 VALUES (REPLACE('XX000000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00XX0000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('0000XX00-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('000000XX-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-XX00-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-00XX-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-XX00-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-00XX-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-XX00-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-00XX-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-XX0000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00XX00000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000XX000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-000000XX0000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00000000XX00','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000000000XX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+#
+# Logical ORDER BY
+#
+SELECT * FROM t1 ORDER BY a;
+a
+00000000-0000-0000-0000-000000000000
+00000000-0000-0000-0000-000000000000
+00000000-0000-0000-0000-000000000000
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+00000000-0000-0000-0000-0f0000000000
+#
+# Lexicographical ORDER BY
+#
+SELECT * FROM t1 ORDER BY CAST(a AS BINARY(16));
+a
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+0c000000-0000-0000-0000-000000000000
+0d000000-0000-0000-0000-000000000000
+0e000000-0000-0000-0000-000000000000
+0f000000-0000-0000-0000-000000000000
+SELECT * FROM t1 ORDER BY CAST(COALESCE(NULL,a) AS BINARY(16));
+a
+00000000-0000-0000-0000-000000000000
+00000000-0000-0000-0000-000000000000
+00000000-0000-0000-0000-000000000000
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+00000001-0000-0000-0000-000000000000
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+00000005-0000-0000-0000-000000000000
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+00000007-0000-0000-0000-000000000000
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+0000000e-0000-0000-0000-000000000000
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+00000f00-0000-0000-0000-000000000000
+00010000-0000-0000-0000-000000000000
+00020000-0000-0000-0000-000000000000
+00030000-0000-0000-0000-000000000000
+00040000-0000-0000-0000-000000000000
+00050000-0000-0000-0000-000000000000
+00060000-0000-0000-0000-000000000000
+00070000-0000-0000-0000-000000000000
+00080000-0000-0000-0000-000000000000
+00090000-0000-0000-0000-000000000000
+000a0000-0000-0000-0000-000000000000
+000b0000-0000-0000-0000-000000000000
+000c0000-0000-0000-0000-000000000000
+000d0000-0000-0000-0000-000000000000
+000e0000-0000-0000-0000-000000000000
+000f0000-0000-0000-0000-000000000000
+01000000-0000-0000-0000-000000000000
+02000000-0000-0000-0000-000000000000
+03000000-0000-0000-0000-000000000000
+04000000-0000-0000-0000-000000000000
+05000000-0000-0000-0000-000000000000
+06000000-0000-0000-0000-000000000000
+07000000-0000-0000-0000-000000000000
+08000000-0000-0000-0000-000000000000
+09000000-0000-0000-0000-000000000000
+0a000000-0000-0000-0000-000000000000
+0b000000-0000-0000-0000-000000000000
+0c000000-0000-0000-0000-000000000000
+0d000000-0000-0000-0000-000000000000
+0e000000-0000-0000-0000-000000000000
+0f000000-0000-0000-0000-000000000000
+DROP TABLE t1;
+#
 # cmp_item_uuid: IN for non-constants
 #
 CREATE TABLE t1 (a UUID, b UUID);
@@ -596,10 +1659,10 @@ INSERT INTO t1 VALUES (CAST(CONCAT('2','0000000-0000-0000-0000-000000000003') AS
 SELECT * FROM t1 ORDER BY a;
 a
 10000000-0000-0000-0000-000000000001
-10000000-0000-0000-0000-000000000002
-10000000-0000-0000-0000-000000000003
 20000000-0000-0000-0000-000000000001
+10000000-0000-0000-0000-000000000002
 20000000-0000-0000-0000-000000000002
+10000000-0000-0000-0000-000000000003
 20000000-0000-0000-0000-000000000003
 DROP TABLE t1;
 #
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid.test b/plugin/type_uuid/mysql-test/type_uuid/type_uuid.test
index ae6d3d40d5b..5f1ffc3e97c 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid.test
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid.test
@@ -139,6 +139,50 @@ SELECT * FROM t1 WHERE a IN ('::', 10);
 DROP TABLE t1;
 
 --echo #
+--echo # ORDER BY
+--echo #
+
+CREATE TABLE t1 (a UUID);
+DELIMITER $$;
+FOR i IN 0..15
+DO
+  INSERT INTO t1 VALUES (REPLACE('XX000000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00XX0000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('0000XX00-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('000000XX-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-XX00-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-00XX-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-XX00-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-00XX-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-XX00-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-00XX-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-XX0000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00XX00000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000XX000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-000000XX0000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00000000XX00','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000000000XX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+DELIMITER ;$$
+
+--echo #
+--echo # Logical ORDER BY
+--echo #
+SELECT * FROM t1 ORDER BY a;
+SELECT COALESCE(NULL, a) FROM t1 ORDER BY a;
+
+--echo #
+--echo # Lexicographical ORDER BY
+--echo #
+
+SELECT * FROM t1 ORDER BY CAST(a AS BINARY(16));
+SELECT * FROM t1 ORDER BY CAST(COALESCE(NULL,a) AS BINARY(16));
+
+DROP TABLE t1;
+
+
+--echo #
 --echo # cmp_item_uuid: IN for non-constants
 --echo #
 
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_engines.inc b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_engines.inc
index 91909d94228..41494c86ff6 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_engines.inc
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_engines.inc
@@ -66,3 +66,43 @@ SELECT * FROM t1 WHERE a=CAST('00000000-0000-0000-0000-0000000000ff' AS UUID);
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=CAST('00000000-0000-0000-0000-0000000000ff' AS UUID);
 
 DROP TABLE t1;
+
+
+CREATE OR REPLACE TABLE t1 (a UUID,KEY(a));
+SHOW CREATE TABLE t1;
+BEGIN;
+DELIMITER $$;
+FOR i IN 0..255
+DO
+  INSERT INTO t1 VALUES (REPLACE('XX000000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00XX0000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('0000XX00-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('000000XX-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-XX00-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-00XX-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-XX00-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-00XX-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-XX00-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-00XX-000000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-XX0000000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00XX00000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000XX000000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-000000XX0000','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00000000XX00','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000000000XX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+DELIMITER ;$$
+COMMIT;
+EXPLAIN SELECT * FROM t1 WHERE a='ff000000-0000-0000-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00ff0000-0000-0000-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='0000ff00-0000-0000-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='000000ff-0000-0000-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-ff00-0000-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-00ff-0000-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-ff00-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-00ff-0000-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-ff00-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-00ff-000000000000';
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-0000-ff0000000000';
+DROP TABLE t1;
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_innodb.result b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_innodb.result
index 643a2e9f0cb..a23fb1865a4 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_innodb.result
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_innodb.result
@@ -115,6 +115,69 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = UUID'00000000-0000-0000-0000-0000000000ff'
 DROP TABLE t1;
+CREATE OR REPLACE TABLE t1 (a UUID,KEY(a));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` uuid DEFAULT NULL,
+  KEY `a` (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+BEGIN;
+FOR i IN 0..255
+DO
+INSERT INTO t1 VALUES (REPLACE('XX000000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00XX0000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('0000XX00-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('000000XX-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-XX00-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-00XX-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-XX00-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-00XX-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-XX00-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-00XX-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-XX0000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00XX00000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000XX000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-000000XX0000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00000000XX00','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000000000XX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+COMMIT;
+EXPLAIN SELECT * FROM t1 WHERE a='ff000000-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00ff0000-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='0000ff00-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='000000ff-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-ff00-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-00ff-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-ff00-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-00ff-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-ff00-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-00ff-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-0000-ff0000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+DROP TABLE t1;
 #
 # End of 10.5 tests
 #
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_memory.result b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_memory.result
index 42bb74d4b01..9d2c27a9e25 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_memory.result
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_memory.result
@@ -25,7 +25,7 @@ a
 00000000-0000-0000-0000-0000000000ff
 EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-0000-0000000000ff';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+1	SIMPLE	t1	ref	a	a	17	const	4	Using where
 SELECT * FROM t1 WHERE a='garbage';
 a
 Warnings:
@@ -66,7 +66,7 @@ EXPLAIN SELECT * FROM t1 WHERE a IN
 '00000000-0000-0000-0000-0000000000f0'
 );
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	a	a	17	NULL	6	Using where
+1	SIMPLE	t1	range	a	a	17	NULL	12	Using where
 SELECT * FROM t1 WHERE a IN
 (
 '00000000-0000-0000-0000-000000000080',
@@ -85,7 +85,7 @@ EXPLAIN SELECT * FROM t1 WHERE a IN
 'garbage'
 );
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	a	a	17	NULL	4	Using where
+1	SIMPLE	t1	range	a	a	17	NULL	8	Using where
 Warnings:
 Warning	1292	Incorrect uuid value: 'garbage'
 SELECT * FROM t1 WHERE a BETWEEN
@@ -178,10 +178,73 @@ a
 00000000-0000-0000-0000-0000000000ff
 EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=CAST('00000000-0000-0000-0000-0000000000ff' AS UUID);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	ref	a	a	17	const	2	100.00	Using where
+1	SIMPLE	t1	ref	a	a	17	const	4	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = UUID'00000000-0000-0000-0000-0000000000ff'
 DROP TABLE t1;
+CREATE OR REPLACE TABLE t1 (a UUID,KEY(a));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` uuid DEFAULT NULL,
+  KEY `a` (`a`)
+) ENGINE=MEMORY DEFAULT CHARSET=latin1
+BEGIN;
+FOR i IN 0..255
+DO
+INSERT INTO t1 VALUES (REPLACE('XX000000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00XX0000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('0000XX00-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('000000XX-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-XX00-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-00XX-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-XX00-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-00XX-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-XX00-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-00XX-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-XX0000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00XX00000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000XX000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-000000XX0000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00000000XX00','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000000000XX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+COMMIT;
+EXPLAIN SELECT * FROM t1 WHERE a='ff000000-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00ff0000-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='0000ff00-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='000000ff-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-ff00-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-00ff-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-ff00-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-00ff-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-ff00-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-00ff-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-0000-ff0000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	2	Using where
+DROP TABLE t1;
 #
 # End of 10.5 tests
 #
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.result b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.result
index fb788dd91ab..35cc25abfd6 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.result
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.result
@@ -1,5 +1,5 @@
 #
-# Start of 10.5 tests
+# Start of 10.7 tests
 #
 #
 # MDEV-4958 Adding datatype UUID
@@ -41,7 +41,7 @@ a
 00000000-0000-0000-0000-0000000000ff
 EXPLAIN SELECT * FROM t1 WHERE a>='00000000-0000-0000-0000-0000000000fe';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	a	a	17	NULL	2	Using where; Using index
+1	SIMPLE	t1	range	a	a	17	NULL	3	Using where; Using index
 SELECT * FROM t1 WHERE a>='garbage';
 a
 EXPLAIN SELECT * FROM t1 WHERE a>='garbage';
@@ -64,7 +64,7 @@ EXPLAIN SELECT * FROM t1 WHERE a IN
 '00000000-0000-0000-0000-0000000000f0'
 );
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	a	a	17	NULL	3	Using where; Using index
+1	SIMPLE	t1	range	a	a	17	NULL	4	Using where; Using index
 SELECT * FROM t1 WHERE a IN
 (
 '00000000-0000-0000-0000-000000000080',
@@ -115,6 +115,123 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = UUID'00000000-0000-0000-0000-0000000000ff'
 DROP TABLE t1;
+CREATE OR REPLACE TABLE t1 (a UUID,KEY(a));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` uuid DEFAULT NULL,
+  KEY `a` (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+BEGIN;
+FOR i IN 0..255
+DO
+INSERT INTO t1 VALUES (REPLACE('XX000000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00XX0000-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('0000XX00-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('000000XX-0000-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-XX00-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-00XX-0000-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-XX00-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-00XX-0000-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-XX00-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-00XX-000000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-XX0000000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00XX00000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000XX000000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-000000XX0000','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-00000000XX00','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t1 VALUES (REPLACE('00000000-0000-0000-0000-0000000000XX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+COMMIT;
+EXPLAIN SELECT * FROM t1 WHERE a='ff000000-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00ff0000-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='0000ff00-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='000000ff-0000-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-ff00-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-00ff-0000-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-ff00-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-00ff-0000-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-ff00-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-00ff-000000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+EXPLAIN SELECT * FROM t1 WHERE a='00000000-0000-0000-0000-ff0000000000';
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	17	const	1	Using where; Using index
+DROP TABLE t1;
+#
+# Testing index prefix compression
+#
+CREATE PROCEDURE test_pack_key()
+BEGIN
+SHOW CREATE TABLE t1;
+FOR i IN 0..0x1FFF
+DO
+INSERT INTO t1 VALUES (UUID());
+END FOR;
+SELECT
+CASE
+WHEN INDEX_LENGTH/DATA_LENGTH < 0.7 THEN 'PACKED'
+      WHEN INDEX_LENGTH/DATA_LENGTH > 1.2 THEN 'NOT PACKED'
+      ELSE CONCAT('UNKNOWN ', INDEX_LENGTH/DATA_LENGTH)
+END AS PackKey
+FROM INFORMATION_SCHEMA.TABLES
+WHERE TABLE_SCHEMA='test' AND TABLE_NAME='t1';
+END;
+$$
+"------------------ CREATE TABLE"
+CREATE TABLE t1 (a UUID, KEY(a));
+CALL test_pack_key();
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` uuid DEFAULT NULL,
+  KEY `a` (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+PackKey
+PACKED
+DROP TABLE t1;
+"------------------ t1packkey.frm"
+TRUNCATE TABLE t1;
+CALL test_pack_key();
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` uuid DEFAULT NULL,
+  KEY `a` (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+PackKey
+PACKED
+DROP TABLE t1;
+"------------------ t1nopackkey.frm"
+TRUNCATE TABLE t1;
+CALL test_pack_key();
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` uuid DEFAULT NULL,
+  KEY `a` (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+PackKey
+NOT PACKED
+DROP TABLE t1;
+DROP PROCEDURE test_pack_key;
 #
-# End of 10.5 tests
+# End of 10.7 tests
 #
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.test b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.test
index 0f992779666..7526d344fc3 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.test
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_myisam.test
@@ -1,5 +1,7 @@
+let $MYSQLD_DATADIR= `select @@datadir`;
+
 --echo #
---echo # Start of 10.5 tests
+--echo # Start of 10.7 tests
 --echo #
 
 --echo #
@@ -10,7 +12,50 @@
 SET default_storage_engine=MyISAM;
 --source type_uuid_engines.inc
 
+--echo #
+--echo # Testing index prefix compression
+--echo #
+
+DELIMITER $$;
+CREATE PROCEDURE test_pack_key()
+BEGIN
+  SHOW CREATE TABLE t1;
+  FOR i IN 0..0x1FFF
+  DO
+    INSERT INTO t1 VALUES (UUID());
+  END FOR;
+  SELECT
+    CASE
+      WHEN INDEX_LENGTH/DATA_LENGTH < 0.7 THEN 'PACKED'
+      WHEN INDEX_LENGTH/DATA_LENGTH > 1.2 THEN 'NOT PACKED'
+      ELSE CONCAT('UNKNOWN ', INDEX_LENGTH/DATA_LENGTH)
+    END AS PackKey
+  FROM INFORMATION_SCHEMA.TABLES
+  WHERE TABLE_SCHEMA='test' AND TABLE_NAME='t1';
+END;
+$$
+DELIMITER ;$$
+
+--echo "------------------ CREATE TABLE"
+CREATE TABLE t1 (a UUID, KEY(a));
+CALL test_pack_key();
+DROP TABLE t1;
+
+--echo "------------------ t1packkey.frm"
+--copy_file $MTR_SUITE_DIR/std_data/t1packkey.frm $MYSQLD_DATADIR/test/t1.frm
+TRUNCATE TABLE t1;
+CALL test_pack_key();
+DROP TABLE t1;
+
+--echo "------------------ t1nopackkey.frm"
+--copy_file $MTR_SUITE_DIR/std_data/t1nopackkey.frm $MYSQLD_DATADIR/test/t1.frm
+TRUNCATE TABLE t1;
+CALL test_pack_key();
+DROP TABLE t1;
+
+
+DROP PROCEDURE test_pack_key;
 
 --echo #
---echo # End of 10.5 tests
+--echo # End of 10.7 tests
 --echo #
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.result b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.result
index bd0879325e7..82b96002d2e 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.result
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.result
@@ -27,3 +27,1771 @@ SELECT * FROM t1 PARTITION (pFF);
 a
 ffff0000-0000-0000-0000-00000000ffff
 DROP TABLE t1;
+CREATE TABLE t0 (a UUID);
+FOR i IN 0..255
+DO
+INSERT INTO t0 VALUES (REPLACE('XXfd306d-307f-11ec-8d10-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t0 VALUES (REPLACE('9cfd306d-XX7f-12ec-8d10-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-13XX-8d10-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-14ec-8dXX-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-15ec-8d10-XX0bbc909b57','XX',LPAD(HEX(i),2,'0')));
+INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-16ec-8d10-d20bbc909bXX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+# Test that UUID and BINARY(16) implement the same distribution by key
+CREATE PROCEDURE test_partition_by_key_uuid_vs_binary(parts INT)
+BEGIN
+EXECUTE IMMEDIATE REPLACE('CREATE TABLE t1 (a UUID) PARTITION BY KEY (a) PARTITIONS 7','7',parts);
+EXECUTE IMMEDIATE REPLACE('CREATE TABLE t2 (a BINARY(16)) PARTITION BY KEY (a) PARTITIONS 7','7',parts);
+INSERT INTO t1 SELECT * FROM t0;
+INSERT INTO t2 SELECT * FROM t0;
+FOR i IN 0..(parts-1)
+DO
+BEGIN
+DECLARE query_template TEXT DEFAULT 'SELECT a_p0, COUNT(*) FROM ('
+                                          'SELECT a AS a_p0 FROM t1 PARTITION(p0) '
+                                          'UNION ALL '
+                                          'SELECT CAST(a AS UUID) AS a_p0 FROM t2 PARTITION(p0)) td '
+                                          'GROUP BY a_p0';
+DECLARE query TEXT DEFAULT REPLACE(query_template,'p0',CONCAT('p',i));
+SELECT query;
+EXECUTE IMMEDIATE query;
+END;
+END FOR;
+DROP TABLE t1,t2;
+END;
+$$
+# Display statistics how records are distributed between partitions
+CREATE PROCEDURE test_partition_by_key_pstat(parts INT)
+BEGIN
+EXECUTE IMMEDIATE REPLACE('CREATE TABLE t1 (a UUID) PARTITION BY KEY (a) PARTITIONS 7','7',parts);
+CREATE TABLE t1_pstat (pname VARCHAR(32), pcount int);
+INSERT INTO t1 SELECT * FROM t0;
+FOR i IN 0..(parts-1)
+DO
+BEGIN
+DECLARE query_template TEXT DEFAULT 'INSERT INTO t1_pstat VALUES (''p0'',(SELECT COUNT(*) FROM t1 PARTITION (p0)))';
+EXECUTE IMMEDIATE REPLACE(query_template,'p0',CONCAT('p',i));
+END;
+END FOR;
+SELECT * FROM t1_pstat ORDER BY CAST(SUBSTR(pname,2,100) AS UNSIGNED);
+DROP TABLE t1,t1_pstat;
+END;
+$$
+CALL test_partition_by_key_uuid_vs_binary(7);
+query
+SELECT a_p0, COUNT(*) FROM (SELECT a AS a_p0 FROM t1 PARTITION(p0) UNION ALL SELECT CAST(a AS UUID) AS a_p0 FROM t2 PARTITION(p0)) td GROUP BY a_p0
+a_p0	COUNT(*)
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+query
+SELECT a_p1, COUNT(*) FROM (SELECT a AS a_p1 FROM t1 PARTITION(p1) UNION ALL SELECT CAST(a AS UUID) AS a_p1 FROM t2 PARTITION(p1)) td GROUP BY a_p1
+a_p1	COUNT(*)
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+query
+SELECT a_p2, COUNT(*) FROM (SELECT a AS a_p2 FROM t1 PARTITION(p2) UNION ALL SELECT CAST(a AS UUID) AS a_p2 FROM t2 PARTITION(p2)) td GROUP BY a_p2
+a_p2	COUNT(*)
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+query
+SELECT a_p3, COUNT(*) FROM (SELECT a AS a_p3 FROM t1 PARTITION(p3) UNION ALL SELECT CAST(a AS UUID) AS a_p3 FROM t2 PARTITION(p3)) td GROUP BY a_p3
+a_p3	COUNT(*)
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+query
+SELECT a_p4, COUNT(*) FROM (SELECT a AS a_p4 FROM t1 PARTITION(p4) UNION ALL SELECT CAST(a AS UUID) AS a_p4 FROM t2 PARTITION(p4)) td GROUP BY a_p4
+a_p4	COUNT(*)
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+query
+SELECT a_p5, COUNT(*) FROM (SELECT a AS a_p5 FROM t1 PARTITION(p5) UNION ALL SELECT CAST(a AS UUID) AS a_p5 FROM t2 PARTITION(p5)) td GROUP BY a_p5
+a_p5	COUNT(*)
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+query
+SELECT a_p6, COUNT(*) FROM (SELECT a AS a_p6 FROM t1 PARTITION(p6) UNION ALL SELECT CAST(a AS UUID) AS a_p6 FROM t2 PARTITION(p6)) td GROUP BY a_p6
+a_p6	COUNT(*)
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+9cfd306d-307f-16ec-8d10-d20bbc909b6b	2
+9cfd306d-307f-16ec-8d10-d20bbc909b6c	2
+9cfd306d-307f-16ec-8d10-d20bbc909b74	2
+9cfd306d-307f-16ec-8d10-d20bbc909b75	2
+9cfd306d-307f-16ec-8d10-d20bbc909b7d	2
+9cfd306d-307f-16ec-8d10-d20bbc909b7e	2
+9cfd306d-307f-16ec-8d10-d20bbc909b7f	2
+9cfd306d-307f-16ec-8d10-d20bbc909b90	2
+9cfd306d-307f-16ec-8d10-d20bbc909b91	2
+9cfd306d-307f-16ec-8d10-d20bbc909ba5	2
+9cfd306d-307f-16ec-8d10-d20bbc909bbd	2
+9cfd306d-307f-16ec-8d10-d20bbc909bc1	2
+9cfd306d-307f-16ec-8d10-d20bbc909bd5	2
+9cfd306d-307f-16ec-8d10-d20bbc909be2	2
+9cfd306d-307f-16ec-8d10-d20bbc909be3	2
+9cfd306d-307f-16ec-8d10-d20bbc909bea	2
+9cfd306d-307f-16ec-8d10-d20bbc909bed	2
+9cfd306d-307f-16ec-8d10-d20bbc909bf5	2
+9cfd306d-307f-15ec-8d10-d50bbc909b57	2
+9cfd306d-307f-15ec-8d10-da0bbc909b57	2
+9cfd306d-307f-15ec-8d10-db0bbc909b57	2
+9cfd306d-307f-15ec-8d10-e60bbc909b57	2
+9cfd306d-307f-15ec-8d10-e70bbc909b57	2
+9cfd306d-307f-15ec-8d10-f00bbc909b57	2
+9cfd306d-307f-15ec-8d10-f30bbc909b57	2
+9cfd306d-307f-15ec-8d10-fe0bbc909b57	2
+CALL test_partition_by_key_pstat(7);
+pname	pcount
+p0	213
+p1	212
+p2	216
+p3	216
+p4	240
+p5	213
+p6	226
+CALL test_partition_by_key_pstat(4);
+pname	pcount
+p0	64
+p1	64
+p2	64
+p3	1344
+CALL test_partition_by_key_pstat(5);
+pname	pcount
+p0	343
+p1	305
+p2	288
+p3	307
+p4	293
+CALL test_partition_by_key_pstat(6);
+pname	pcount
+p0	47
+p1	469
+p2	38
+p3	451
+p4	43
+p5	488
+CALL test_partition_by_key_pstat(8);
+pname	pcount
+p0	32
+p1	32
+p2	32
+p3	32
+p4	32
+p5	32
+p6	32
+p7	1312
+CALL test_partition_by_key_pstat(9);
+pname	pcount
+p0	174
+p1	171
+p2	175
+p3	155
+p4	157
+p5	180
+p6	169
+p7	184
+p8	171
+CALL test_partition_by_key_pstat(10);
+pname	pcount
+p0	23
+p1	283
+p2	31
+p3	282
+p4	27
+p5	320
+p6	22
+p7	257
+p8	25
+p9	266
+CALL test_partition_by_key_pstat(11);
+pname	pcount
+p0	119
+p1	149
+p2	166
+p3	147
+p4	150
+p5	138
+p6	150
+p7	142
+p8	131
+p9	126
+p10	118
+CALL test_partition_by_key_pstat(12);
+pname	pcount
+p0	23
+p1	21
+p2	19
+p3	435
+p4	22
+p5	27
+p6	24
+p7	448
+p8	19
+p9	16
+p10	21
+p11	461
+CALL test_partition_by_key_pstat(13);
+pname	pcount
+p0	123
+p1	108
+p2	115
+p3	104
+p4	124
+p5	118
+p6	134
+p7	107
+p8	119
+p9	126
+p10	114
+p11	117
+p12	127
+CALL test_partition_by_key_pstat(14);
+pname	pcount
+p0	17
+p1	200
+p2	22
+p3	194
+p4	21
+p5	193
+p6	14
+p7	196
+p8	12
+p9	194
+p10	22
+p11	219
+p12	20
+p13	212
+CALL test_partition_by_key_pstat(15);
+pname	pcount
+p0	121
+p1	110
+p2	99
+p3	90
+p4	82
+p5	112
+p6	105
+p7	110
+p8	117
+p9	103
+p10	110
+p11	90
+p12	79
+p13	100
+p14	108
+CALL test_partition_by_key_pstat(16);
+pname	pcount
+p0	16
+p1	16
+p2	16
+p3	16
+p4	16
+p5	16
+p6	16
+p7	1296
+p8	16
+p9	16
+p10	16
+p11	16
+p12	16
+p13	16
+p14	16
+p15	16
+DROP PROCEDURE test_partition_by_key_uuid_vs_binary;
+DROP PROCEDURE test_partition_by_key_pstat;
+DROP TABLE t0;
diff --git a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.test b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.test
index 6c4341079c9..5bd198c4e8b 100644
--- a/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.test
+++ b/plugin/type_uuid/mysql-test/type_uuid/type_uuid_partition.test
@@ -30,3 +30,75 @@ INSERT INTO t1 VALUES ('ffff0000-0000-0000-0000-00000000ffff');
 SELECT * FROM t1 PARTITION (p00);
 SELECT * FROM t1 PARTITION (pFF);
 DROP TABLE t1;
+
+
+CREATE TABLE t0 (a UUID);
+DELIMITER $$;
+FOR i IN 0..255
+DO
+  INSERT INTO t0 VALUES (REPLACE('XXfd306d-307f-11ec-8d10-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t0 VALUES (REPLACE('9cfd306d-XX7f-12ec-8d10-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-13XX-8d10-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-14ec-8dXX-d20bbc909b57','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-15ec-8d10-XX0bbc909b57','XX',LPAD(HEX(i),2,'0')));
+  INSERT INTO t0 VALUES (REPLACE('9cfd306d-307f-16ec-8d10-d20bbc909bXX','XX',LPAD(HEX(i),2,'0')));
+END FOR;
+$$
+--echo # Test that UUID and BINARY(16) implement the same distribution by key
+CREATE PROCEDURE test_partition_by_key_uuid_vs_binary(parts INT)
+BEGIN
+  EXECUTE IMMEDIATE REPLACE('CREATE TABLE t1 (a UUID) PARTITION BY KEY (a) PARTITIONS 7','7',parts);
+  EXECUTE IMMEDIATE REPLACE('CREATE TABLE t2 (a BINARY(16)) PARTITION BY KEY (a) PARTITIONS 7','7',parts);
+  INSERT INTO t1 SELECT * FROM t0;
+  INSERT INTO t2 SELECT * FROM t0;
+  FOR i IN 0..(parts-1)
+  DO
+    BEGIN
+      DECLARE query_template TEXT DEFAULT 'SELECT a_p0, COUNT(*) FROM ('
+                                          'SELECT a AS a_p0 FROM t1 PARTITION(p0) '
+                                          'UNION ALL '
+                                          'SELECT CAST(a AS UUID) AS a_p0 FROM t2 PARTITION(p0)) td '
+                                          'GROUP BY a_p0';
+      DECLARE query TEXT DEFAULT REPLACE(query_template,'p0',CONCAT('p',i));
+      SELECT query;
+      EXECUTE IMMEDIATE query;
+    END;
+  END FOR;
+  DROP TABLE t1,t2;
+END;
+$$
+--echo # Display statistics how records are distributed between partitions
+CREATE PROCEDURE test_partition_by_key_pstat(parts INT)
+BEGIN
+  EXECUTE IMMEDIATE REPLACE('CREATE TABLE t1 (a UUID) PARTITION BY KEY (a) PARTITIONS 7','7',parts);
+  CREATE TABLE t1_pstat (pname VARCHAR(32), pcount int);
+  INSERT INTO t1 SELECT * FROM t0;
+  FOR i IN 0..(parts-1)
+  DO
+    BEGIN
+      DECLARE query_template TEXT DEFAULT 'INSERT INTO t1_pstat VALUES (''p0'',(SELECT COUNT(*) FROM t1 PARTITION (p0)))';
+      EXECUTE IMMEDIATE REPLACE(query_template,'p0',CONCAT('p',i));
+    END;
+  END FOR;
+  SELECT * FROM t1_pstat ORDER BY CAST(SUBSTR(pname,2,100) AS UNSIGNED);
+  DROP TABLE t1,t1_pstat;
+END;
+$$
+DELIMITER ;$$
+CALL test_partition_by_key_uuid_vs_binary(7);
+CALL test_partition_by_key_pstat(7);
+CALL test_partition_by_key_pstat(4);
+CALL test_partition_by_key_pstat(5);
+CALL test_partition_by_key_pstat(6);
+CALL test_partition_by_key_pstat(8);
+CALL test_partition_by_key_pstat(9);
+CALL test_partition_by_key_pstat(10);
+CALL test_partition_by_key_pstat(11);
+CALL test_partition_by_key_pstat(12);
+CALL test_partition_by_key_pstat(13);
+CALL test_partition_by_key_pstat(14);
+CALL test_partition_by_key_pstat(15);
+CALL test_partition_by_key_pstat(16);
+DROP PROCEDURE test_partition_by_key_uuid_vs_binary;
+DROP PROCEDURE test_partition_by_key_pstat;
+DROP TABLE t0;
diff --git a/plugin/type_uuid/sql_type_uuid.h b/plugin/type_uuid/sql_type_uuid.h
index 9076c874e98..be9fea8ebc9 100644
--- a/plugin/type_uuid/sql_type_uuid.h
+++ b/plugin/type_uuid/sql_type_uuid.h
@@ -24,8 +24,162 @@ public:
   bool ascii_to_fbt(const char *str, size_t str_length);
   size_t to_string(char *dst, size_t dstsize) const;
   static const Name &default_value();
+
+  /*
+    Binary (in-memory) UUIDv1 representation:
+
+      llllllll-mmmm-Vhhh-vsss-nnnnnnnnnnnn
+
+    Binary sortable (in-record) representation:
+
+      nnnnnnnnnnnn-vsss-Vhhh-mmmm-llllllll
+
+    Sign           Section               Bits   Bytes  Pos   PosBinSortable
+    -------------  -------               ----   -----  ---   --------------
+    llllllll       time low              32     4        0   12
+    mmmm           time mid              16     2        4   10
+    Vhhh           version and time hi   16     2        6   8
+    vsss           variant and clock seq 16     2        8   6
+    nnnnnnnnnnnn   node ID               48     6       10   0
+  */
+
+  class Segment
+  {
+    size_t m_memory_pos;
+    size_t m_record_pos;
+    size_t m_length;
+  public:
+    constexpr Segment(size_t memory_pos, size_t record_pos, size_t length)
+     :m_memory_pos(memory_pos), m_record_pos(record_pos), m_length(length)
+    { }
+    void memory_to_record(char *to, const char *from) const
+    {
+      memcpy(to + m_record_pos, from + m_memory_pos, m_length);
+    }
+    void record_to_memory(char *to, const char * from) const
+    {
+      memcpy(to + m_memory_pos, from + m_record_pos, m_length);
+    }
+    int cmp_memory(const char *a, const char *b) const
+    {
+      return memcmp(a + m_memory_pos, b + m_memory_pos, m_length);
+    }
+    void hash_record(const uchar *ptr, ulong *nr, ulong *nr2) const
+    {
+      my_charset_bin.hash_sort(ptr + m_record_pos, m_length, nr, nr2);
+    }
+  };
+
+  static const Segment & segment(uint i)
+  {
+    static Segment segments[]=
+      {
+        {0, 12, 4}, // llllllll
+        {4, 10, 2}, // mmmm
+        {6,  8, 2}, // Vhhh
+        {8,  6, 2}, // vsss
+        {10, 0, 6}  // nnnnnnnnnnnn
+      };
+    return segments[i];
+  }
+
+  // Convert the in-memory representation to the in-record representation
+  static void memory_to_record(char *to, const char *from)
+  {
+    segment(0).memory_to_record(to, from);
+    segment(1).memory_to_record(to, from);
+    segment(2).memory_to_record(to, from);
+    segment(3).memory_to_record(to, from);
+    segment(4).memory_to_record(to, from);
+  }
+
+  // Convert the in-record representation to the in-memory representation
+  static void record_to_memory(char *to, const char *from)
+  {
+    segment(0).record_to_memory(to, from);
+    segment(1).record_to_memory(to, from);
+    segment(2).record_to_memory(to, from);
+    segment(3).record_to_memory(to, from);
+    segment(4).record_to_memory(to, from);
+  }
+
+  /*
+    Calculate a hash of the in-record representation.
+    Used in Field_uuid::hash(), e.g. for KEY partitioning. This
+    makes partition distribution for UUID and BINARY(16) equal,
+    so for example:
+
+    CREATE OR REPLACE TABLE t1 (c1 UUID) PARTITION BY KEY(c1) PARTITIONS 5;
+    INSERT INTO t1 (c1) VALUES (UUID());
+
+    and
+
+    CREATE OR REPLACE TABLE t1 (c1 BINARY(16)) PARTITION BY KEY(c1) PARTITIONS 5;
+    INSERT INTO t1 (c1) VALUES (UUID());
+
+    put values into the same partition.
+  */
+  static void hash_record(const uchar *ptr, ulong *nr, ulong *nr2)
+  {
+    segment(0).hash_record(ptr, nr, nr2);
+    segment(1).hash_record(ptr, nr, nr2);
+    segment(2).hash_record(ptr, nr, nr2);
+    segment(3).hash_record(ptr, nr, nr2);
+    segment(4).hash_record(ptr, nr, nr2);
+  }
+
+  // Compare two in-memory values
+  static int cmp(const LEX_CSTRING &a, const LEX_CSTRING &b)
+  {
+    DBUG_ASSERT(a.length == binary_length());
+    DBUG_ASSERT(b.length == binary_length());
+    int res;
+    if ((res= segment(4).cmp_memory(a.str, b.str)) ||
+        (res= segment(3).cmp_memory(a.str, b.str)) ||
+        (res= segment(2).cmp_memory(a.str, b.str)) ||
+        (res= segment(1).cmp_memory(a.str, b.str)) ||
+        (res= segment(0).cmp_memory(a.str, b.str)))
+      return  res;
+    return 0;
+  }
+
+  static ulong KEY_pack_flags(uint column_nr)
+  {
+    return HA_PACK_KEY;
+  }
+
+  /*
+    Convert in-record representation to binlog representation.
+    We tranfer UUID values in binlog by compressing in-memory representation.
+    This makes replication between UUID and BINARY(16) simpler:
+
+    Transferring by compressing the in-record representation would require
+    extending the binary log format to put the extact data type name into
+    the column metadata.
+  */
+  static uchar *pack(uchar *to, const uchar *from, uint max_length)
+  {
+    uchar buf[binary_length()];
+    record_to_memory((char *) buf, (const char *) from);
+    return StringPack(&my_charset_bin, binary_length()).
+             pack(to, buf, max_length);
+  }
+
+  // Convert binlog representation to in-record representation
+  static const uchar *unpack(uchar *to,
+                             const uchar *from, const uchar *from_end,
+                             uint param_data)
+  {
+    uchar buf[binary_length()];
+    const uchar *rc= StringPack(&my_charset_bin, binary_length()).
+                       unpack(buf, from, from_end, param_data);
+    memory_to_record((char *) to, (const char *) buf);
+    return rc;
+  }
+
 };
 
+
 #include "sql_type_fixedbin.h"
 typedef FixedBinTypeBundle<UUID> UUIDBundle;
 
diff --git a/sql/sql_string.h b/sql/sql_string.h
index fe57c8153bb..795f80c3e08 100644
--- a/sql/sql_string.h
+++ b/sql/sql_string.h
@@ -484,6 +484,11 @@ public:
     if (str.Alloced_length)
       Alloced_length= (uint32) (str.Alloced_length - offset);
   }
+  LEX_CSTRING to_lex_cstring() const
+  {
+    LEX_CSTRING tmp= {Ptr, str_length};
+    return tmp;
+  }
   inline LEX_CSTRING *get_value(LEX_CSTRING *res)
   {
     res->str=    Ptr;
diff --git a/sql/sql_type_fixedbin.h b/sql/sql_type_fixedbin.h
index c6e3d20bcfa..5141cb9fad4 100644
--- a/sql/sql_type_fixedbin.h
+++ b/sql/sql_type_fixedbin.h
@@ -111,6 +111,12 @@ public:
        return fbt;
      }
 
+     static Fbt record_to_memory(const char *ptr)
+     {
+       Fbt fbt;
+       FbtImpl::record_to_memory(fbt.m_buffer, ptr);
+       return fbt;
+     }
     /*
       Check at Item's fix_fields() time if "item" can return a nullable value
       on conversion to Fbt, or conversion produces a NOT NULL Fbt value.
@@ -132,10 +138,10 @@ public:
     {
       *error= make_from_item(item, warn);
     }
-    void to_binary(char *str, size_t str_size) const
+    void to_record(char *str, size_t str_size) const
     {
       DBUG_ASSERT(str_size >= sizeof(m_buffer));
-      memcpy(str, m_buffer, sizeof(m_buffer));
+      FbtImpl::memory_to_record(str, m_buffer);
     }
     bool to_binary(String *to) const
     {
@@ -154,18 +160,13 @@ public:
                                              FbtImpl::max_char_length()+1));
       return false;
     }
-    int cmp(const char *str, size_t length) const
-    {
-      DBUG_ASSERT(length == sizeof(m_buffer));
-      return memcmp(m_buffer, str, length);
-    }
     int cmp(const Binary_string &other) const
     {
-      return cmp(other.ptr(), other.length());
+      return FbtImpl::cmp(FbtImpl::to_lex_cstring(), other.to_lex_cstring());
     }
     int cmp(const Fbt &other) const
     {
-      return memcmp(m_buffer, other.m_buffer, sizeof(m_buffer));
+      return FbtImpl::cmp(FbtImpl::to_lex_cstring(), other.to_lex_cstring());
     }
   };
 
@@ -191,9 +192,9 @@ public:
       DBUG_ASSERT(!is_null());
       return *this;
     }
-    void to_binary(char *str, size_t str_size) const
+    void to_record(char *str, size_t str_size) const
     {
-      to_fbt().to_binary(str, str_size);
+      to_fbt().to_record(str, str_size);
     }
     bool to_binary(String *to) const
     {
@@ -257,6 +258,10 @@ public:
     {
       return FbtImpl::default_value();
     }
+    ulong KEY_pack_flags(uint column_nr) const override
+    {
+      return FbtImpl::KEY_pack_flags(column_nr);
+    }
     protocol_send_type_t protocol_send_type() const override
     {
       return PROTOCOL_SEND_STRING;
@@ -480,7 +485,7 @@ public:
       DBUG_ASSERT(!item->null_value);
       DBUG_ASSERT(FbtImpl::binary_length() == tmp.length());
       DBUG_ASSERT(FbtImpl::binary_length() == sort_field->length);
-      memcpy(to, tmp.ptr(), tmp.length());
+      FbtImpl::memory_to_record((char*) to, tmp.ptr());
     }
     uint make_packed_sort_key_part(uchar *to, Item *item,
                                    const SORT_FIELD_ATTR *sort_field,
@@ -501,7 +506,7 @@ public:
       DBUG_ASSERT(!item->null_value);
       DBUG_ASSERT(FbtImpl::binary_length() == tmp.length());
       DBUG_ASSERT(FbtImpl::binary_length() == sort_field->length);
-      memcpy(to, tmp.ptr(), tmp.length());
+      FbtImpl::memory_to_record((char*) to, tmp.ptr());
       return tmp.length();
     }
     void sort_length(THD *thd, const Type_std_attributes *item,
@@ -697,9 +702,7 @@ public:
 
     int cmp_native(const Native &a, const Native &b) const override
     {
-      DBUG_ASSERT(a.length() == FbtImpl::binary_length());
-      DBUG_ASSERT(b.length() == FbtImpl::binary_length());
-      return memcmp(a.ptr(), b.ptr(), FbtImpl::binary_length());
+      return FbtImpl::cmp(a.to_lex_cstring(), b.to_lex_cstring());
     }
     bool set_comparator_func(THD *thd, Arg_comparator *cmp) const override
     {
@@ -1104,7 +1107,7 @@ public:
       if (fbt.is_null())
         return maybe_null() ? set_null_with_warn(err)
                             : set_min_value_with_warn(err);
-      fbt.to_binary((char *) ptr, FbtImpl::binary_length());
+      fbt.to_record((char *) ptr, FbtImpl::binary_length());
       return 0;
     }
 
@@ -1181,11 +1184,27 @@ public:
       return false;
     }
 
-    String *val_str(String *val_buffer, String *) override
+    bool val_native(Native *to) override
+    {
+      DBUG_ASSERT(marked_for_read());
+      DBUG_ASSERT(!is_null());
+      if (to->alloc(FbtImpl::binary_length()))
+        return true;
+      to->length(FbtImpl::binary_length());
+      FbtImpl::record_to_memory((char*) to->ptr(), (const char*) ptr);
+      return false;
+    }
+
+    Fbt to_fbt() const
     {
       DBUG_ASSERT(marked_for_read());
-      Fbt_null tmp((const char *) ptr, pack_length());
-      return tmp.to_string(val_buffer) ? NULL : val_buffer;
+      DBUG_ASSERT(!is_null());
+      return Fbt::record_to_memory((const char*) ptr);
+    }
+
+    String *val_str(String *val_buffer, String *) override
+    {
+      return to_fbt().to_string(val_buffer) ? NULL : val_buffer;
     }
 
     my_decimal *val_decimal(my_decimal *to) override
@@ -1224,7 +1243,7 @@ public:
     {
       DBUG_ASSERT(marked_for_write_or_computed());
       DBUG_ASSERT(value.length() == FbtImpl::binary_length());
-      memcpy(ptr, value.ptr(), value.length());
+      FbtImpl::memory_to_record((char*) ptr, value.ptr());
       return 0;
     }
 
@@ -1406,6 +1425,13 @@ public:
                   item->type_handler() == type_handler());
       return true;
     }
+    void hash(ulong *nr, ulong *nr2)
+    {
+      if (is_null())
+        *nr^= (*nr << 1) | 1;
+      else
+        FbtImpl::hash_record(ptr, nr, nr2);
+    }
     SEL_ARG *get_mm_leaf(RANGE_OPT_PARAM *prm, KEY_PART *key_part,
                          const Item_bool_func *cond,
                          scalar_comparison_op op, Item *value) override
@@ -1447,13 +1473,13 @@ public:
     uchar *pack(uchar *to, const uchar *from, uint max_length) override
     {
       DBUG_PRINT("debug", ("Packing field '%s'", field_name.str));
-      return StringPack(&my_charset_bin, FbtImpl::binary_length()).pack(to, from, max_length);
+      return FbtImpl::pack(to, from, max_length);
     }
 
     const uchar *unpack(uchar *to, const uchar *from, const uchar *from_end,
                         uint param_data) override
     {
-      return StringPack(&my_charset_bin, FbtImpl::binary_length()).unpack(to, from, from_end, param_data);
+      return FbtImpl::unpack(to, from, from_end, param_data);
     }
 
     uint max_packed_col_length(uint max_length) override
diff --git a/sql/sql_type_fixedbin_storage.h b/sql/sql_type_fixedbin_storage.h
index 0e8ac81ab59..6e18335bd4c 100644
--- a/sql/sql_type_fixedbin_storage.h
+++ b/sql/sql_type_fixedbin_storage.h
@@ -21,6 +21,38 @@
   format and their own (variable size) canonical string representation.
 
   Examples are INET6 and UUID types.
+
+  The MariaDB server uses three binary representations of a data type:
+
+  1. In-memory binary representation (user visible)
+    This representation:
+    - can be used in INSERT..VALUES (X'AABBCC')
+    - can be used in WHERE conditions: WHERE c1=X'AABBCC'
+    - is returned by CAST(x AS BINARY(N))
+    - is returned by Field::val_native() and Item::val_native()
+
+  2. In-record binary representation (user invisible)
+    This representation:
+    - is used in records (is pointed by Field::ptr)
+    - must be comparable by memcmp()
+
+  3. Binlog binary (row) representation
+    Usually, for string data types the binlog representation
+    is based on the in-record representation with trailing byte compression:
+    - trailing space compression for text string data types
+    - trailing zero compression for binary string data types
+
+  We have to have separate in-memory and in-record representations
+  because we use HA_KEYTYPE_BINARY for indexing. The engine API
+  does not have a way to pass a comparison function as a parameter.
+
+  The default implementation below assumes that:
+  - the in-memory and in-record representations are equal
+  - the binlog representation is compatible with BINARY(N)
+  This is OK for simple data types, like INET6.
+
+  Data type implementations that need different representations
+  can override the default implementation (like e.g. UUID does).
 */
 
 /***********************************************************************/
@@ -29,6 +61,7 @@ template<size_t NATIVE_LEN, size_t MAX_CHAR_LEN>
 class FixedBinTypeStorage
 {
 protected:
+  // The buffer that stores the in-memory binary representation
   char m_buffer[NATIVE_LEN];
 
   // Non-initializing constructor
@@ -42,7 +75,7 @@ protected:
   }
 public:
 
-  // Initialize from binary representation
+  // Initialize from the in-memory binary representation
   FixedBinTypeStorage(const char *str, size_t length)
   {
     if (length != binary_length())
@@ -51,9 +84,49 @@ public:
       memcpy(&m_buffer, str, sizeof(m_buffer));
   }
 
+  // Return the buffer with the in-memory representation
+  Lex_cstring to_lex_cstring() const
+  {
+    return Lex_cstring(m_buffer, sizeof(m_buffer));
+  }
+
   static constexpr uint binary_length() { return NATIVE_LEN; }
   static constexpr uint max_char_length() { return MAX_CHAR_LEN; }
 
+  // Compare the in-memory binary representations of two values
+  static int cmp(const LEX_CSTRING &a, const LEX_CSTRING &b)
+  {
+    DBUG_ASSERT(a.length == binary_length());
+    DBUG_ASSERT(b.length == binary_length());
+    return memcmp(a.str, b.str, b.length);
+  }
+
+  /*
+    Convert from the in-memory to the in-record representation.
+    Used in Field::store_native().
+  */
+  static void memory_to_record(char *to, const char *from)
+  {
+    memcpy(to, from, NATIVE_LEN);
+  }
+  /*
+    Convert from the in-record to the in-memory representation
+    Used in Field::val_native().
+  */
+  static void record_to_memory(char *to, const char *from)
+  {
+    memcpy(to, from, NATIVE_LEN);
+  }
+
+  /*
+    Hash the in-record representation
+    Used in Field::hash().
+  */
+  static void hash_record(const uchar *ptr, ulong *nr, ulong *nr2)
+  {
+    my_charset_bin.hash_sort(ptr, binary_length(), nr, nr2);
+  }
+
   static bool only_zero_bytes(const char *ptr, size_t length)
   {
     for (uint i= 0 ; i < length; i++)
@@ -64,5 +137,37 @@ public:
     return true;
   }
 
+  static ulong KEY_pack_flags(uint column_nr)
+  {
+    /*
+      Return zero by default. A particular data type can override
+      this method return some flags, e.g. HA_PACK_KEY to enable
+      key prefix compression.
+    */
+    return 0;
+  }
+
+  /*
+    Convert from the in-record to the binlog representation.
+    Used in Field::pack(), and in filesort to store the addon fields.
+    By default, do what BINARY(N) does.
+  */
+  static uchar *pack(uchar *to, const uchar *from, uint max_length)
+  {
+    return StringPack(&my_charset_bin, binary_length()).pack(to, from, max_length);
+  }
+
+  /*
+    Convert from the in-binary-log to the in-record representation.
+    Used in Field::unpack().
+    By default, do what BINARY(N) does.
+  */
+  static const uchar *unpack(uchar *to, const uchar *from, const uchar *from_end,
+                             uint param_data)
+  {
+    return StringPack(&my_charset_bin, binary_length()).unpack(to, from, from_end,
+                                                               param_data);
+  }
+
 };
 #endif /* SQL_TYPE_FIXEDBIN_STORAGE */
author	Alexander Barkov <bar@mariadb.com>	2021-10-19 13:17:11 +0400
committer	Alexander Barkov <bar@mariadb.com>	2021-10-22 13:52:52 +0400
commit	d2427bc0f5339cef7e6ca831d859780f248ed649 (patch)
tree	89691ef56966101e649d21d57ab41ec930def769
parent	5cfb31854a4b28385d7e4940f297616042b0f345 (diff)
download	mariadb-git-bb-10.7-bar-uuid.tar.gz