MDEV-22165 CONVERT TABLE: move in partition from existing table

Syntax for CONVERT TABLE ALTER TABLE tbl_name CONVERT TABLE tbl_name TO PARTITION partition_name partition_spec Examples: ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 VALUES LESS THAN MAX_VALUE(); New ALTER_PARTITION_CONVERT_IN command for fast_alter_partition_table() is done in alter_partition_convert_in() function which basically does ha_rename_table(). Table structure and data check is basically the same as in EXCHANGE PARTITION command. And these are done by compare_table_with_partition() and check_table_data(). Atomic DDL is done by the scheme from MDEV-22166 (see the corresponding commit message). The only differnce is that it also has to drop source table frm and that is done by WFRM_DROP_CONVERTED_FROM. Initial patch was done by Dmitry Shulga <dmitry.shulga@mariadb.com>

MDEV-22165 CONVERT TABLE: move in partition from existing table
Syntax for CONVERT TABLE ALTER TABLE tbl_name CONVERT TABLE tbl_name TO PARTITION partition_name partition_spec Examples: ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 VALUES LESS THAN MAX_VALUE(); New ALTER_PARTITION_CONVERT_IN command for fast_alter_partition_table() is done in alter_partition_convert_in() function which basically does ha_rename_table(). Table structure and data check is basically the same as in EXCHANGE PARTITION command. And these are done by compare_table_with_partition() and check_table_data(). Atomic DDL is done by the scheme from MDEV-22166 (see the corresponding commit message). The only differnce is that it also has to drop source table frm and that is done by WFRM_DROP_CONVERTED_FROM. Initial patch was done by Dmitry Shulga <dmitry.shulga@mariadb.com>
69724805 · Aleksey Midenkov · Sergei Golubchik · 7da721be · 69724805 · 69724805
Commit 69724805 authored Sep 28, 2021 by Aleksey Midenkov Committed by Sergei Golubchik Oct 26, 2021
17 changed files
--- a/mysql-test/suite/atomic/alter_partition,innodb.rdiff
+++ b/mysql-test/suite/atomic/alter_partition,innodb.rdiff
 --- alter_partition.result
 +++ alter_partition,innodb.reject
-@@ -12,12 +12,9 @@
+@@ -17,12 +17,9 @@
 end $
 # QUERY: ALTER TABLE t1 CONVERT PARTITION p1 TO TABLE tp1
 # CRASH: crash_create_before_create_frm
@@ -16,7 +16,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -33,12 +30,9 @@
+@@ -38,12 +35,9 @@
 12
 22
 # CRASH: crash_alter_partition_after_create_frm
@@ -32,7 +32,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -54,12 +48,9 @@
+@@ -59,12 +53,9 @@
 12
 22
 # CRASH: crash_alter_partition_after_write_frm
@@ -48,7 +48,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -75,12 +66,9 @@
+@@ -80,12 +71,9 @@
 12
 22
 # CRASH: crash_convert_partition_1
@@ -64,7 +64,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -96,12 +84,9 @@
+@@ -101,12 +89,9 @@
 12
 22
 # CRASH: crash_convert_partition_2
@@ -80,7 +80,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -117,12 +102,9 @@
+@@ -122,12 +107,9 @@
 12
 22
 # CRASH: crash_convert_partition_3
@@ -96,7 +96,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -138,12 +120,9 @@
+@@ -143,12 +125,9 @@
 12
 22
 # CRASH: crash_convert_partition_4
@@ -112,7 +112,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -159,12 +138,9 @@
+@@ -164,12 +143,9 @@
 12
 22
 # CRASH: crash_convert_partition_5
@@ -128,7 +128,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -180,12 +156,9 @@
+@@ -185,12 +161,9 @@
 12
 22
 # CRASH: crash_convert_partition_6
@@ -144,7 +144,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -201,12 +174,9 @@
+@@ -206,12 +179,9 @@
 12
 22
 # CRASH: crash_convert_partition_7
@@ -160,7 +160,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -222,12 +192,9 @@
+@@ -227,12 +197,9 @@
 12
 22
 # CRASH: crash_convert_partition_8
@@ -176,7 +176,7 @@
 t1.frm
 t1.par
 Table	Create Table
-@@ -243,15 +210,12 @@
+@@ -248,15 +215,12 @@
 12
 22
 # CRASH: crash_convert_partition_9
@@ -195,7 +195,7 @@
 master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT PARTITION p1 TO TABLE tp1
 Table	Create Table
 t1	CREATE TABLE `t1` (
-@@ -270,15 +234,12 @@
+@@ -275,15 +239,12 @@
 x
 12
 # CRASH: crash_convert_partition_10
@@ -214,7 +214,7 @@
 master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT PARTITION p1 TO TABLE tp1
 Table	Create Table
 t1	CREATE TABLE `t1` (
-@@ -297,15 +258,12 @@
+@@ -302,15 +263,12 @@
 x
 12
 # CRASH: crash_convert_partition_11
@@ -233,3 +233,293 @@
 master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT PARTITION p1 TO TABLE tp1
 Table	Create Table
 t1	CREATE TABLE `t1` (
+@@ -330,14 +288,10 @@
+ 12
+ # QUERY: ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+ # NO CRASH: crash_create_before_create_frm
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#p2.MYD
+-t1#P#p2.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#p2.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+ master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+@@ -357,14 +311,10 @@
+ 32
+ 39
+ # NO CRASH: crash_alter_partition_after_create_frm
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#p2.MYD
+-t1#P#p2.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#p2.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+ master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+@@ -384,14 +334,10 @@
+ 32
+ 39
+ # NO CRASH: crash_alter_partition_after_write_frm
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#p2.MYD
+-t1#P#p2.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#p2.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+ master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+@@ -411,17 +357,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_1
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -442,17 +384,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_2
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -473,17 +411,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_3
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -504,17 +438,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_4
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -535,17 +465,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_5
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -566,17 +492,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_6
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -597,17 +519,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_7
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -628,17 +546,13 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_8
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+-tp2.MYD
+-tp2.MYI
+ tp2.frm
+tp2.ibd
+ Table	Create Table
+ t1	CREATE TABLE `t1` (
+   `x` int(11) DEFAULT NULL
+@@ -659,14 +573,10 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_9
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#p2.MYD
+-t1#P#p2.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#p2.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+ master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+@@ -686,14 +596,10 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_10
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#p2.MYD
+-t1#P#p2.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#p2.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+ master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+@@ -713,14 +619,10 @@
+ 32
+ 39
+ # CRASH: crash_convert_partition_11
+-t1#P#p0.MYD
+-t1#P#p0.MYI
+-t1#P#p1.MYD
+-t1#P#p1.MYI
+-t1#P#p2.MYD
+-t1#P#p2.MYI
+-t1#P#pn.MYD
+-t1#P#pn.MYI
+t1#P#p0.ibd
+t1#P#p1.ibd
+t1#P#p2.ibd
+t1#P#pn.ibd
+ t1.frm
+ t1.par
+ master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
--- a/mysql-test/suite/atomic/alter_partition.result
+++ b/mysql-test/suite/atomic/alter_partition.result
 # Crash recovery
-create or replace procedure prepare_table()
+create or replace procedure prepare_table(r int)
 begin
 create or replace table t1 (x int)
 with system versioning
 partition by range(x) (
 partition p0 values less than (10),
 partition p1 values less than (20),
-partition pn values less than maxvalue);
+partition pn values less than (30));
 insert into t1 values (2), (12), (22);
+if r > 1 then
+create or replace table tp2 (x int)
+with system versioning;
+insert into tp2 values (32), (39);
+end if;
 flush tables;
 end $
 # QUERY: ALTER TABLE t1 CONVERT PARTITION p1 TO TABLE tp1
@@ -27,7 +32,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -48,7 +53,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -69,7 +74,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -90,7 +95,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -111,7 +116,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -132,7 +137,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -153,7 +158,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -174,7 +179,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -195,7 +200,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -216,7 +221,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -237,7 +242,7 @@ t1	CREATE TABLE `t1` (
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
 PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 12
@@ -259,7 +264,7 @@ t1	CREATE TABLE `t1` (
 ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 22
@@ -286,7 +291,7 @@ t1	CREATE TABLE `t1` (
 ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 22
@@ -313,7 +318,7 @@ t1	CREATE TABLE `t1` (
 ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
 PARTITION BY RANGE (`x`)
 (PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
- PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = DEFAULT_ENGINE)
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
 x
 2
 22
@@ -323,5 +328,416 @@ tp1	CREATE TABLE `tp1` (
 ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
 x
 12
+# QUERY: ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+# NO CRASH: crash_create_before_create_frm
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p2` VALUES LESS THAN (40) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+32
+39
+# NO CRASH: crash_alter_partition_after_create_frm
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p2` VALUES LESS THAN (40) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+32
+39
+# NO CRASH: crash_alter_partition_after_write_frm
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p2` VALUES LESS THAN (40) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+32
+39
+# CRASH: crash_convert_partition_1
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_2
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_3
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_4
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_5
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_6
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_7
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_8
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+tp2.MYD
+tp2.MYI
+tp2.frm
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+x
+32
+39
+# CRASH: crash_convert_partition_9
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p2` VALUES LESS THAN (40) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+32
+39
+# CRASH: crash_convert_partition_10
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p2` VALUES LESS THAN (40) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+32
+39
+# CRASH: crash_convert_partition_11
+t1#P#p0.MYD
+t1#P#p0.MYI
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+master-bin.000001	#	Query	#	#	use `test`; ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
+ PARTITION BY RANGE (`x`)
+(PARTITION `p0` VALUES LESS THAN (10) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p1` VALUES LESS THAN (20) ENGINE = DEFAULT_ENGINE,
+ PARTITION `pn` VALUES LESS THAN (30) ENGINE = DEFAULT_ENGINE,
+ PARTITION `p2` VALUES LESS THAN (40) ENGINE = DEFAULT_ENGINE)
+x
+2
+12
+22
+32
+39
 Warnings:
 Note	1051	Unknown table 'test.t1'
--- a/mysql-test/suite/atomic/alter_partition.test
+++ b/mysql-test/suite/atomic/alter_partition.test
@@ -55,22 +55,30 @@ let $crash_points='crash_create_before_create_frm',
 #let $crash_count= 1;
 #let $crash_points= 'crash_convert_partition_10';

-let $statement_count= 1;
-let $statements= 'ALTER TABLE t1 CONVERT PARTITION p1 TO TABLE tp1';
+let $statement_count= 2;
+let $statements= 'ALTER TABLE t1 CONVERT PARTITION p1 TO TABLE tp1',
+                 'ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)';

-#let $statement_count=1;
-#let $statements='CREATE OR REPLACE TABLE t1 SELECT * from const_table';
+#let $statement_count= 1;
+#let $statements= 'ALTER TABLE t1 CONVERT TABLE tp2 TO PARTITION p2 values less than (40)';

 --delimiter $
-create or replace procedure prepare_table()
+create or replace procedure prepare_table(r int)
 begin
  create or replace table t1 (x int)
  with system versioning
  partition by range(x) (
    partition p0 values less than (10),
    partition p1 values less than (20),
-    partition pn values less than maxvalue);
+    partition pn values less than (30));
  insert into t1 values (2), (12), (22);
+
+  if r > 1 then
+    create or replace table tp2 (x int)
+    with system versioning;
+    insert into tp2 values (32), (39);
+  end if;
+
  flush tables;
 end $
 --delimiter ;
@@ -95,7 +103,7 @@ while ($r < $statement_count)
    let $crash=`select ELT($c, $crash_points)`;

    --eval set @@default_storage_engine=$default_engine
-    call prepare_table;
+    eval call prepare_table($r);
    if (!$c)
    {
      lock tables t1 write;
@@ -147,6 +155,11 @@ while ($r < $statement_count)
    show create table tp1;
    --error 0, ER_NO_SUCH_TABLE
    select * from tp1;
+    --replace_result $default_engine DEFAULT_ENGINE ' PAGE_CHECKSUM=1' ''
+    --error 0, ER_NO_SUCH_TABLE
+    show create table tp2;
+    --error 0, ER_NO_SUCH_TABLE
+    select * from tp2;
    # Drop the tables. The warnings will show what was dropped
    --disable_warnings
    drop table t1;

--- a/mysql-test/suite/parts/inc/partition_fail_t2.inc
+++ b/mysql-test/suite/parts/inc/partition_fail_t2.inc
@@ -2,30 +2,40 @@
 # To be used with WL#4445: EXCHANGE PARTITION WITH TABLE.
 --eval $create_statement2
 --eval $insert_statement2
-SHOW CREATE TABLE t2;
--sorted_result
-SELECT * FROM t2;
 --eval $create_statement
 --eval $insert_statement
--echo # State before failure
+--let $dbug_flag= `select @@session.debug_dbug`
+--echo # $dbug_flag: BEFORE failure
 --replace_result #p# #P#
+if (!$DATADIR)
+{
+  --let $DATADIR= `SELECT @@datadir;`
+}
 --list_files $DATADIR/test
 SHOW CREATE TABLE t1;
 --sorted_result
 SELECT * FROM t1;
+SHOW CREATE TABLE t2;
+--sorted_result
+SELECT * FROM t2;
 # accept all errors
 --disable_abort_on_error
 --replace_regex /#sql-exchange-[0-9a-f_\-]*/#sql-exchange/i
 --eval $fail_statement
 --enable_abort_on_error
--echo # State after failure
+--echo # $dbug_flag: AFTER failure
 --replace_result #p# #P#
 --list_files $DATADIR/test
 SHOW CREATE TABLE t1;
 --sorted_result
 SELECT * FROM t1;
 DROP TABLE t1;
+--error 0, ER_NO_SUCH_TABLE
 SHOW CREATE TABLE t2;
 --sorted_result
+--error 0, ER_NO_SUCH_TABLE
 SELECT * FROM t2;
+# TODO: everything fails with ER_NO_SUCH_TABLE
+#       but DROP TABLE fails with ER_BAD_TABLE_ERROR! Why?
+--error 0, ER_BAD_TABLE_ERROR
 DROP TABLE t2;
--- a/mysql-test/suite/parts/r/alter_table.result
+++ b/mysql-test/suite/parts/r/alter_table.result
@@ -29,7 +29,87 @@ ERROR 42000: Can't open table
 DROP VIEW v1;
 DROP TABLE t1, t2;
 #
-# MDEV-22166 MIGRATE PARTITION: move out partition into a table
+# MDEV-22165 CONVERT PARTITION: move in partition from existing table
+#
+create or replace table tp1 (a int);
+create or replace table t1 (a int)
+partition by hash (a) partitions 2;
+alter table t1 convert table tp1 to partition p2;
+ERROR HY000: CONVERT TABLE TO PARTITION can only be used on RANGE/LIST partitions
+create or replace table t1 (a int)
+partition by range (a)
+(partition p0 values less than (0));
+alter table t1 convert table non_existent to partition p1 values less than (10);
+ERROR 42S02: Table 'test.non_existent' doesn't exist
+alter table t1 convert table tp1 to partition p1 values less than (10);
+show create table tp1;
+ERROR 42S02: Table 'test.tp1' doesn't exist
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=X DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`a`)
+(PARTITION `p0` VALUES LESS THAN (0) ENGINE = X,
+ PARTITION `p1` VALUES LESS THAN (10) ENGINE = X)
+create table tp2 (x int);
+alter table t1 convert table tp2 to partition p2 values less than (20);
+ERROR HY000: Tables have different definitions
+show create table tp2;
+Table	Create Table
+tp2	CREATE TABLE `tp2` (
+  `x` int(11) DEFAULT NULL
+) ENGINE=X DEFAULT CHARSET=latin1
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=X DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`a`)
+(PARTITION `p0` VALUES LESS THAN (0) ENGINE = X,
+ PARTITION `p1` VALUES LESS THAN (10) ENGINE = X)
+create or replace table tp2 (a int);
+insert tp2 values (1), (15), (17);
+alter table t1 convert table tp2 to partition p2 values less than (20);
+ERROR HY000: Found a row that does not match the partition
+delete from tp2;
+insert tp2 values (15), (1), (17);
+alter table t1 convert table tp2 to partition p2 values less than (20);
+ERROR HY000: Found a row that does not match the partition
+delete from tp2;
+insert tp2 values (15), (17), (1);
+alter table t1 convert table tp2 to partition p2 values less than (20);
+ERROR HY000: Found a row that does not match the partition
+delete from tp2;
+insert tp2 values (15), (17);
+alter table t1 convert table tp2 to partition p2 values less than (20);
+show create table tp2;
+ERROR 42S02: Table 'test.tp2' doesn't exist
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=X DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`a`)
+(PARTITION `p0` VALUES LESS THAN (0) ENGINE = X,
+ PARTITION `p1` VALUES LESS THAN (10) ENGINE = X,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = X)
+select * from t1 partition (p2);
+a
+15
+17
+create or replace table t1 (a int)
+partition by range (a) (
+p0 values less than (0),
+pn values less than (30));
+insert into t1 values (1);
+create or replace table tp1 (a int);
+insert into tp1 values (2);
+alter table t1 convert table tp1 to partition p1 values less than (10);
+ERROR HY000: VALUES LESS THAN value must be strictly increasing for each partition
+drop tables t1, tp1;
+#
+# MDEV-22166 CONVERT PARTITION: move out partition into a table
 #
 create or replace table t1 (x int);
 alter table t1 convert partition p1 to table tp1;

--- a/mysql-test/suite/parts/r/partition_debug.result
+++ b/mysql-test/suite/parts/r/partition_debug.result
@@ -1025,23 +1025,11 @@ SET @save_dbug=@@debug_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_1";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_1: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1075,9 +1063,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_1: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1129,23 +1129,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_2";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_2: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1179,9 +1167,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_2: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1233,23 +1233,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_3";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_3: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1283,9 +1271,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error on rename of './test/t2' to './test/#sql-exchange' (errno: 0 "Internal error/check (Not system error)")
-# State after failure
+# d,exchange_partition_fail_3: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1337,23 +1337,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_4";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_4: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1387,9 +1375,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_4: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1441,23 +1441,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_5";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_5: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1491,9 +1479,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error on rename of './test/t1#P#p0' to './test/t2' (errno: 0 "Internal error/check (Not system error)")
-# State after failure
+# d,exchange_partition_fail_5: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1545,23 +1545,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_6";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_6: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1595,9 +1583,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_6: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1649,23 +1649,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_7";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_7: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1699,9 +1687,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error on rename of './test/#sql-exchange' to './test/t1#P#p0' (errno: 0 "Internal error/check (Not system error)")
-# State after failure
+# d,exchange_partition_fail_7: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1753,23 +1753,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_8";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_8: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1803,9 +1791,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_8: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1857,23 +1857,11 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_9";
 CREATE TABLE t2 (a INT, b VARCHAR(64));
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64)) PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_9: BEFORE failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1907,9 +1895,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_9: AFTER failure
 db.opt
 t1#P#p0.MYD
 t1#P#p0.MYI
@@ -1959,7 +1959,925 @@ a	b
 DROP TABLE t2;
 SET SESSION debug_dbug=@save_dbug;
 #
-# MDEV-22166 MIGRATE PARTITION: move out partition into a table
+# MDEV-22165 CONVERT PARTITION: move in partition from existing table
+#
+set @save_dbug=@@debug_dbug;
+set session debug_dbug="+d,fail_convert_partition_1";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_1: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_1: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_2";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_2: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_2: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_3";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_3: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_3: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_4";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_4: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_4: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_5";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_5: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_5: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_6";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_6: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_6: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_7";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_7: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_7: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_8";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_8: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_8: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_9";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_9: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_9: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_11";
+create or replace table t2 (x int primary key);
+insert into t2 values (32), (42), (52);
+create or replace table t1 (x int primary key)
+partition by range(x) (
+partition p1 values less than (10),
+partition p2 values less than (20),
+partition p3 values less than (30));
+insert into t1 values (2), (12), (22);
+# d,fail_convert_partition_11: BEFORE failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1.frm
+t1.par
+t2.MYD
+t2.MYI
+t2.frm
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+x
+32
+42
+52
+alter table t1 convert table t2 to partition pn values less than maxvalue;
+ERROR HY000: Unknown error
+# d,fail_convert_partition_11: AFTER failure
+db.opt
+t1#P#p1.MYD
+t1#P#p1.MYI
+t1#P#p2.MYD
+t1#P#p2.MYI
+t1#P#p3.MYD
+t1#P#p3.MYI
+t1#P#pn.MYD
+t1#P#pn.MYI
+t1.frm
+t1.par
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `x` int(11) NOT NULL,
+  PRIMARY KEY (`x`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ PARTITION BY RANGE (`x`)
+(PARTITION `p1` VALUES LESS THAN (10) ENGINE = MyISAM,
+ PARTITION `p2` VALUES LESS THAN (20) ENGINE = MyISAM,
+ PARTITION `p3` VALUES LESS THAN (30) ENGINE = MyISAM,
+ PARTITION `pn` VALUES LESS THAN MAXVALUE ENGINE = MyISAM)
+SELECT * FROM t1;
+x
+12
+2
+22
+32
+42
+52
+DROP TABLE t1;
+SHOW CREATE TABLE t2;
+SELECT * FROM t2;
+DROP TABLE t2;
+set session debug_dbug=@save_dbug;
+#
+# MDEV-22166 CONVERT PARTITION: move out partition into a table
 #
 set @save_dbug=@@debug_dbug;
 set session debug_dbug="+d,fail_create_before_create_frm";

--- a/mysql-test/suite/parts/r/partition_debug_innodb.result
+++ b/mysql-test/suite/parts/r/partition_debug_innodb.result
@@ -961,25 +961,13 @@ SET @save_dbug=@@debug_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_1";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_1: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1010,9 +998,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_1: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1061,25 +1061,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_2";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_2: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1110,9 +1098,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_2: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1161,25 +1161,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_3";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_3: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1210,9 +1198,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error on rename of './test/t2' to './test/#sql-exchange' (errno: 0 "Internal error/check (Not system error)")
-# State after failure
+# d,exchange_partition_fail_3: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1261,25 +1261,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_4";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_4: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1310,9 +1298,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_4: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1361,25 +1361,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_5";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_5: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1410,9 +1398,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error on rename of './test/t1#P#p0' to './test/t2' (errno: 0 "Internal error/check (Not system error)")
-# State after failure
+# d,exchange_partition_fail_5: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1461,25 +1461,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_6";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_6: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1510,9 +1498,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_6: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1561,25 +1561,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_7";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_7: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1610,9 +1598,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error on rename of './test/#sql-exchange' to './test/t1#P#p0' (errno: 0 "Internal error/check (Not system error)")
-# State after failure
+# d,exchange_partition_fail_7: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1661,25 +1661,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_8";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_8: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1710,9 +1698,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_8: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1761,25 +1761,13 @@ SET SESSION debug_dbug=@save_dbug;
 SET SESSION debug_dbug="+d,exchange_partition_fail_9";
 CREATE TABLE t2 (a INT, b VARCHAR(64)) ENGINE = InnoDB;
 INSERT INTO t2 VALUES (5, "Original from table t2"), (6, "Original from table t2"), (7, "Original from table t2"), (8, "Original from table t2");
-SHOW CREATE TABLE t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `a` int(11) DEFAULT NULL,
-  `b` varchar(64) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
-SELECT * FROM t2;
-a	b
-5	Original from table t2
-6	Original from table t2
-7	Original from table t2
-8	Original from table t2
 CREATE TABLE t1 (a INT, b VARCHAR(64))
 ENGINE = InnoDB
 PARTITION BY RANGE (a)
 (PARTITION p0 VALUES LESS THAN (10),
 PARTITION p1 VALUES LESS THAN MAXVALUE);
 INSERT INTO t1 VALUES (1, "Original from partition p0"), (2, "Original from partition p0"), (3, "Original from partition p0"), (4, "Original from partition p0"), (11, "Original from partition p1"), (12, "Original from partition p1"), (13, "Original from partition p1"), (14, "Original from partition p1"), (21, "Original from partition p1"), (22, "Original from partition p1"), (23, "Original from partition p1"), (24, "Original from partition p1");
-# State before failure
+# d,exchange_partition_fail_9: BEFORE failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd
@@ -1810,9 +1798,21 @@ a	b
 24	Original from partition p1
 3	Original from partition p0
 4	Original from partition p0
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) DEFAULT NULL,
+  `b` varchar(64) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+SELECT * FROM t2;
+a	b
+5	Original from table t2
+6	Original from table t2
+7	Original from table t2
+8	Original from table t2
 ALTER TABLE t1 EXCHANGE PARTITION p0 WITH TABLE t2;
 ERROR HY000: Error in DDL log
-# State after failure
+# d,exchange_partition_fail_9: AFTER failure
 db.opt
 t1#P#p0.ibd
 t1#P#p1.ibd

--- a/mysql-test/suite/parts/t/alter_table.test
+++ b/mysql-test/suite/parts/t/alter_table.test
@@ -39,7 +39,72 @@ DROP VIEW v1;
 DROP TABLE t1, t2;

 --echo #
--echo # MDEV-22166 MIGRATE PARTITION: move out partition into a table
+--echo # MDEV-22165 CONVERT PARTITION: move in partition from existing table
+--echo #
+create or replace table tp1 (a int);
+create or replace table t1 (a int)
+partition by hash (a) partitions 2;
+--error ER_ONLY_ON_RANGE_LIST_PARTITION
+alter table t1 convert table tp1 to partition p2;
+
+create or replace table t1 (a int)
+partition by range (a)
+(partition p0 values less than (0));
+
+--error ER_NO_SUCH_TABLE
+alter table t1 convert table non_existent to partition p1 values less than (10);
+alter table t1 convert table tp1 to partition p1 values less than (10);
+--error ER_NO_SUCH_TABLE
+show create table tp1;
+--replace_result $engine X ' PAGE_CHECKSUM=1' ''
+show create table t1;
+
+create table tp2 (x int);
+--error ER_TABLES_DIFFERENT_METADATA
+alter table t1 convert table tp2 to partition p2 values less than (20);
+--replace_result $engine X ' PAGE_CHECKSUM=1' ''
+show create table tp2;
+--replace_result $engine X ' PAGE_CHECKSUM=1' ''
+show create table t1;
+
+create or replace table tp2 (a int);
+insert tp2 values (1), (15), (17);
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table t1 convert table tp2 to partition p2 values less than (20);
+delete from tp2;
+insert tp2 values (15), (1), (17);
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table t1 convert table tp2 to partition p2 values less than (20);
+delete from tp2;
+insert tp2 values (15), (17), (1);
+--error ER_ROW_DOES_NOT_MATCH_PARTITION
+alter table t1 convert table tp2 to partition p2 values less than (20);
+delete from tp2;
+insert tp2 values (15), (17);
+alter table t1 convert table tp2 to partition p2 values less than (20);
+--error ER_NO_SUCH_TABLE
+show create table tp2;
+--replace_result $engine X ' PAGE_CHECKSUM=1' ''
+show create table t1;
+select * from t1 partition (p2);
+
+create or replace table t1 (a int)
+partition by range (a) (
+p0 values less than (0),
+pn values less than (30));
+insert into t1 values (1);
+create or replace table tp1 (a int);
+insert into tp1 values (2);
+# TODO: would be good to automatically detect order of partitions,
+# as well as move the data from succeeding partitions (ADD PARTITION FR).
+--error ER_RANGE_NOT_INCREASING_ERROR
+alter table t1 convert table tp1 to partition p1 values less than (10);
+
+drop tables t1, tp1;
+
+
+--echo #
+--echo # MDEV-22166 CONVERT PARTITION: move out partition into a table
 --echo #

 create or replace table t1 (x int);

--- a/mysql-test/suite/parts/t/partition_debug.test
+++ b/mysql-test/suite/parts/t/partition_debug.test
@@ -52,7 +52,55 @@ let $fail_statement= $crash_statement;
 --source suite/parts/inc/partition_fail_exchange.inc

 --echo #
--echo # MDEV-22166 MIGRATE PARTITION: move out partition into a table
+--echo # MDEV-22165 CONVERT PARTITION: move in partition from existing table
+--echo #
+let $create_statement= create or replace table t1 (x int primary key)
+  partition by range(x) (
+    partition p1 values less than (10),
+    partition p2 values less than (20),
+    partition p3 values less than (30));
+
+let $create_statement2= create or replace table t2 (x int primary key);
+let $insert_statement= insert into t1 values (2), (12), (22);
+let $insert_statement2= insert into t2 values (32), (42), (52);
+
+let $fail_statement= alter table t1 convert table t2 to partition pn values less than maxvalue;
+
+set @save_dbug=@@debug_dbug;
+set session debug_dbug="+d,fail_convert_partition_1";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_2";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_3";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_4";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_5";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_6";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_7";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_8";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_9";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+set session debug_dbug="+d,fail_convert_partition_11";
+--source suite/parts/inc/partition_fail_t2.inc
+set session debug_dbug=@save_dbug;
+
+
+--echo #
+--echo # MDEV-22166 CONVERT PARTITION: move out partition into a table
 --echo #
 let $create_statement= create or replace table t1 (x int primary key)
  partition by range(x) (

--- a/sql/handler.h
+++ b/sql/handler.h
@@ -823,8 +823,9 @@ typedef bool Log_func(THD*, TABLE*, bool, const uchar*, const uchar*);
 // Set by Sql_cmd_alter_table_truncate_partition::execute()
 #define ALTER_PARTITION_TRUNCATE    (1ULL << 11)
 // Set for REORGANIZE PARTITION
-#define ALTER_PARTITION_TABLE_REORG           (1ULL << 12)
-#define ALTER_PARTITION_CONVERT_OUT    (1ULL << 13)
+#define ALTER_PARTITION_TABLE_REORG (1ULL << 12)
+#define ALTER_PARTITION_CONVERT_IN  (1ULL << 13)
+#define ALTER_PARTITION_CONVERT_OUT (1ULL << 14)

 /*
  This is master database for most of system tables. However there

--- a/sql/sql_alter.cc
+++ b/sql/sql_alter.cc
@@ -440,6 +440,7 @@ bool Sql_cmd_alter_table::execute(THD *thd)
    as for RENAME TO, as being done by SQLCOM_RENAME_TABLE
  */
  if ((alter_info.partition_flags & ALTER_PARTITION_DROP) ||
+      (alter_info.partition_flags & ALTER_PARTITION_CONVERT_IN) ||
      (alter_info.partition_flags & ALTER_PARTITION_CONVERT_OUT) ||
      (alter_info.flags & ALTER_RENAME))
    priv_needed|= DROP_ACL;

--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -6045,8 +6045,10 @@ int st_select_lex_unit::save_union_explain_part2(Explain_query *output)
 bool LEX::is_partition_management() const
 {
  return (sql_command == SQLCOM_ALTER_TABLE &&
-          (alter_info.partition_flags ==  ALTER_PARTITION_ADD ||
-           alter_info.partition_flags ==  ALTER_PARTITION_REORGANIZE));
+          (alter_info.partition_flags & (ALTER_PARTITION_ADD |
+                                         ALTER_PARTITION_CONVERT_IN |
+                                         ALTER_PARTITION_CONVERT_OUT |
+                                         ALTER_PARTITION_REORGANIZE)));
 }



--- a/sql/sql_partition.cc
+++ b/sql/sql_partition.cc
@@ -4870,7 +4870,8 @@ uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
       ALTER_PARTITION_COALESCE |
       ALTER_PARTITION_REORGANIZE |
       ALTER_PARTITION_TABLE_REORG |
-       ALTER_PARTITION_REBUILD))
+       ALTER_PARTITION_REBUILD |
+       ALTER_PARTITION_CONVERT_IN))
  {
    /*
      You can't add column when we are doing alter related to partition
@@ -5076,6 +5077,13 @@ uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
    }
    if (alter_info->partition_flags & ALTER_PARTITION_ADD)
    {
+      if ((alter_info->partition_flags & ALTER_PARTITION_CONVERT_IN) &&
+          !(tab_part_info->part_type == RANGE_PARTITION ||
+            tab_part_info->part_type == LIST_PARTITION))
+      {
+        my_error(ER_ONLY_ON_RANGE_LIST_PARTITION, MYF(0), "CONVERT TABLE TO");
+        goto err;
+      }
      if (*fast_alter_table && thd->locked_tables_mode)
      {
        MEM_ROOT *old_root= thd->mem_root;
@@ -6387,12 +6395,20 @@ static bool write_log_changed_partitions(ALTER_PARTITION_PARAM_TYPE *lpt,
    FALSE                    Success
 */

+enum log_action_enum
+{
+  ACT_DROP = 0,
+  ACT_CONVERT_IN,
+  ACT_CONVERT_OUT
+};
+
 static bool log_drop_or_convert_action(ALTER_PARTITION_PARAM_TYPE *lpt,
                                       uint *next_entry, const char *path,
-                                       const char *from_name, bool temp_list)
+                                       const char *from_name, bool temp_list,
+                                       const log_action_enum convert_action)
 {
  DDL_LOG_ENTRY ddl_log_entry;
-  const bool convert_action= (from_name != NULL);
+  DBUG_ASSERT(convert_action == ACT_DROP || (from_name != NULL));
  partition_info *part_info= lpt->part_info;
  DDL_LOG_MEMORY_ENTRY *log_entry;
  char tmp_path[FN_REFLEN + 1];
@@ -6427,7 +6443,10 @@ static bool log_drop_or_convert_action(ALTER_PARTITION_PARAM_TYPE *lpt,
        name_variant= TEMP_PART_NAME;
      else
        name_variant= NORMAL_PART_NAME;
-      DBUG_ASSERT(!convert_action || part_elem->part_state == PART_TO_BE_DROPPED);
+      DBUG_ASSERT(convert_action != ACT_CONVERT_IN ||
+                  part_elem->part_state == PART_TO_BE_ADDED);
+      DBUG_ASSERT(convert_action != ACT_CONVERT_OUT ||
+                  part_elem->part_state == PART_TO_BE_DROPPED);
      if (part_info->is_sub_partitioned())
      {
        DBUG_ASSERT(!convert_action);
@@ -6464,9 +6483,18 @@ static bool log_drop_or_convert_action(ALTER_PARTITION_PARAM_TYPE *lpt,
                                  part_elem->partition_name, name_variant,
                                  TRUE))
          DBUG_RETURN(TRUE);
-        ddl_log_entry.name= { tmp_path, strlen(tmp_path) };
-        if (convert_action)
-          ddl_log_entry.from_name= { from_name, strlen(from_name) };
+        switch (convert_action)
+        {
+          case ACT_CONVERT_OUT:
+            ddl_log_entry.from_name= { from_name, strlen(from_name) };
+            /* fall through */
+          case ACT_DROP:
+            ddl_log_entry.name= { tmp_path, strlen(tmp_path) };
+            break;
+          case ACT_CONVERT_IN:
+            ddl_log_entry.name= { from_name, strlen(from_name) };
+            ddl_log_entry.from_name= { tmp_path, strlen(tmp_path) };
+        }
        if (ddl_log_write_entry(&ddl_log_entry, &log_entry))
        {
          DBUG_RETURN(TRUE);
@@ -6486,18 +6514,24 @@ static bool write_log_dropped_partitions(ALTER_PARTITION_PARAM_TYPE *lpt,
                                         uint *next_entry, const char *path,
                                         bool temp_list)
 {
-  return log_drop_or_convert_action(lpt, next_entry, path, NULL, temp_list);
+  return log_drop_or_convert_action(lpt, next_entry, path, NULL, temp_list,
+                                    ACT_DROP);
 }

 inline
-static bool write_log_convert_out_partition(ALTER_PARTITION_PARAM_TYPE *lpt,
-                                           uint *next_entry, const char *path)
-{
-  char from_name[FN_REFLEN + 1];
-  build_table_filename(from_name, sizeof(from_name) - 1, lpt->alter_ctx->new_db.str,
+static bool write_log_convert_partition(ALTER_PARTITION_PARAM_TYPE *lpt,
+                                        uint *next_entry, const char *path)
+{
+  char other_table[FN_REFLEN + 1];
+  const ulong f= lpt->alter_info->partition_flags;
+  DBUG_ASSERT((f & ALTER_PARTITION_CONVERT_IN) || (f & ALTER_PARTITION_CONVERT_OUT));
+  const log_action_enum convert_action= (f & ALTER_PARTITION_CONVERT_IN)
+                                         ? ACT_CONVERT_IN : ACT_CONVERT_OUT;
+  build_table_filename(other_table, sizeof(other_table) - 1, lpt->alter_ctx->new_db.str,
                       lpt->alter_ctx->new_name.str, "", 0);
  DDL_LOG_MEMORY_ENTRY *main_entry= lpt->part_info->main_entry;
-  bool res= log_drop_or_convert_action(lpt, next_entry, path, from_name, false);
+  bool res= log_drop_or_convert_action(lpt, next_entry, path, other_table,
+                                       false, convert_action);
  /*
    NOTE: main_entry is "drop shadow frm", we have to keep it like this
    because partitioning crash-safety disables it at install shadow FRM phase.
@@ -6537,6 +6571,16 @@ static bool write_log_drop_frm(ALTER_PARTITION_PARAM_TYPE *lpt,
  if (ddl_log_delete_frm(drop_chain, (const char*)path))
    goto error;

+  if (drop_backup && (lpt->alter_info->partition_flags & ALTER_PARTITION_CONVERT_IN))
+  {
+    TABLE_LIST *table_from= lpt->table_list->next_local;
+    build_table_filename(path, sizeof(path) - 1, table_from->db.str,
+                         table_from->table_name.str, "", 0);
+
+    if (ddl_log_delete_frm(drop_chain, (const char*) path))
+      goto error;
+  }
+
  if (ddl_log_write_execute_entry(drop_chain->list->entry_pos,
                                  drop_backup ?
                                    main_chain->execute_entry->entry_pos : 0,
@@ -6664,7 +6708,7 @@ static bool write_log_drop_partition(ALTER_PARTITION_PARAM_TYPE *lpt)
 }


-static bool write_log_convert_out_partition(ALTER_PARTITION_PARAM_TYPE *lpt)
+static bool write_log_convert_partition(ALTER_PARTITION_PARAM_TYPE *lpt)
 {
  partition_info *part_info= lpt->part_info;
  char tmp_path[FN_REFLEN + 1];
@@ -6676,7 +6720,7 @@ static bool write_log_convert_out_partition(ALTER_PARTITION_PARAM_TYPE *lpt)

  mysql_mutex_lock(&LOCK_gdl);

-  if (write_log_convert_out_partition(lpt, &next_entry, (const char*)path))
+  if (write_log_convert_partition(lpt, &next_entry, (const char*)path))
    goto error;
  DBUG_ASSERT(next_entry == part_info->list->entry_pos);
  if (ddl_log_write_execute_entry(part_info->list->entry_pos,
@@ -7162,6 +7206,64 @@ bool log_partition_alter_to_ddl_log(ALTER_PARTITION_PARAM_TYPE *lpt)
 }


+extern bool alter_partition_convert_in(ALTER_PARTITION_PARAM_TYPE *lpt);
+
+/**
+  Check that definition of source table fits definition of partition being
+  added and every row stored in the table conforms partition's expression.
+
+  @param lpt  Structure containing parameters required for checking
+  @param[in,out] part_file_name_buf  Buffer for storing a partition name
+  @param part_file_name_buf_sz  Size of buffer for storing a partition name
+  @param part_file_name_len  Length of partition prefix stored in the buffer
+                             on invocation of function
+
+  @return false on success, true on error
+*/
+
+static bool check_table_data(ALTER_PARTITION_PARAM_TYPE *lpt)
+{
+  /*
+     TODO: if destination is partitioned by range(X) and source is indexed by X
+     then just get min(X) and max(X) from index.
+  */
+  THD *thd= lpt->thd;
+  TABLE *table_to= lpt->table_list->table;
+  TABLE *table_from= lpt->table_list->next_local->table;
+
+  DBUG_ASSERT(thd->mdl_context.is_lock_owner(MDL_key::TABLE,
+                                             table_to->s->db.str,
+                                             table_to->s->table_name.str,
+                                             MDL_EXCLUSIVE));
+
+  DBUG_ASSERT(thd->mdl_context.is_lock_owner(MDL_key::TABLE,
+                                             table_from->s->db.str,
+                                             table_from->s->table_name.str,
+                                             MDL_EXCLUSIVE));
+
+  uint32 new_part_id;
+  partition_element *part_elem;
+  const char* partition_name= thd->lex->part_info->curr_part_elem->partition_name;
+  part_elem= table_to->part_info->get_part_elem(partition_name,
+                                                nullptr, 0, &new_part_id);
+  if (unlikely(!part_elem))
+    return true;
+
+  if (unlikely(new_part_id == NOT_A_PARTITION_ID))
+  {
+    DBUG_ASSERT(table_to->part_info->is_sub_partitioned());
+    my_error(ER_PARTITION_INSTEAD_OF_SUBPARTITION, MYF(0));
+    return true;
+  }
+
+  if (verify_data_with_partition(table_from, table_to, new_part_id))
+  {
+    return true;
+  }
+
+  return false;
+}
+

 /**
  Actually perform the change requested by ALTER TABLE of partitions
@@ -7390,7 +7492,7 @@ uint fast_alter_partition_table(THD *thd, TABLE *table,
        ERROR_INJECT("convert_partition_3") ||
        wait_while_table_is_used(thd, table, HA_EXTRA_NOT_USED) ||
        ERROR_INJECT("convert_partition_4") ||
-        write_log_convert_out_partition(lpt) ||
+        write_log_convert_partition(lpt) ||
        ERROR_INJECT("convert_partition_5") ||
        alter_close_table(lpt) ||
        ERROR_INJECT("convert_partition_6") ||
@@ -7419,10 +7521,60 @@ uint fast_alter_partition_table(THD *thd, TABLE *table,
        ERROR_INJECT("convert_partition_11"))
      goto err;
  }
+  else if ((alter_info->partition_flags & ALTER_PARTITION_CONVERT_IN))
+  {
+    DDL_LOG_STATE chain_drop_backup;
+    bzero(&chain_drop_backup, sizeof(chain_drop_backup));
+    TABLE *table_from= table_list->next_local->table;
+
+    if (wait_while_table_is_used(thd, table, HA_EXTRA_NOT_USED) ||
+        wait_while_table_is_used(thd, table_from, HA_EXTRA_PREPARE_FOR_RENAME) ||
+        ERROR_INJECT("convert_partition_1") ||
+        compare_table_with_partition(thd, table_from, table, NULL, 0) ||
+        ERROR_INJECT("convert_partition_2") ||
+        check_table_data(lpt))
+      goto err;
+
+    if (write_log_drop_shadow_frm(lpt) ||
+        ERROR_INJECT("convert_partition_3") ||
+        mysql_write_frm(lpt, WFRM_WRITE_SHADOW) ||
+        ERROR_INJECT("convert_partition_4") ||
+        alter_close_table(lpt) ||
+        ERROR_INJECT("convert_partition_5") ||
+        write_log_convert_partition(lpt) ||
+        ERROR_INJECT("convert_partition_6") ||
+        alter_partition_convert_in(lpt) ||
+        ERROR_INJECT("convert_partition_7") ||
+        (frm_install= true, false) ||
+        write_log_drop_frm(lpt, &chain_drop_backup) ||
+        mysql_write_frm(lpt, WFRM_INSTALL_SHADOW|WFRM_BACKUP_ORIGINAL) ||
+        log_partition_alter_to_ddl_log(lpt) ||
+        (frm_install= false, false) ||
+        ERROR_INJECT("convert_partition_8") ||
+        ((!thd->lex->no_write_to_binlog) &&
+          ((thd->binlog_xid= thd->query_id),
+           ddl_log_update_xid(lpt->part_info, thd->binlog_xid),
+           write_bin_log(thd, false, thd->query(), thd->query_length()),
+           (thd->binlog_xid= 0))) ||
+        ERROR_INJECT("convert_partition_9"))
+    {
+      ddl_log_complete(&chain_drop_backup);
+      (void) ddl_log_revert(thd, lpt->part_info);
+      handle_alter_part_error(lpt, true, true, false);
+      goto err;
+    }
+    ddl_log_complete(lpt->part_info);
+    ERROR_INJECT("convert_partition_10");
+    (void) ddl_log_revert(thd, &chain_drop_backup);
+    if (alter_partition_lock_handling(lpt) ||
+        ERROR_INJECT("convert_partition_11"))
+      goto err;
+  }
  else if ((alter_info->partition_flags & ALTER_PARTITION_ADD) &&
           (part_info->part_type == RANGE_PARTITION ||
            part_info->part_type == LIST_PARTITION))
  {
+    DBUG_ASSERT(!(alter_info->partition_flags & ALTER_PARTITION_CONVERT_IN));
    /*
      ADD RANGE/LIST PARTITIONS
      In this case there are no tuples removed and no tuples are added.

--- a/sql/sql_partition.h
+++ b/sql/sql_partition.h
@@ -279,11 +279,16 @@ bool verify_data_with_partition(TABLE *table, TABLE *part_table,
                                uint32 part_id);
 bool compare_partition_options(HA_CREATE_INFO *table_create_info,
                               partition_element *part_elem);
+bool compare_table_with_partition(THD *thd, TABLE *table,
+                                  TABLE *part_table,
+                                  partition_element *part_elem,
+                                  uint part_id);
 bool partition_key_modified(TABLE *table, const MY_BITMAP *fields);
 bool write_log_replace_frm(ALTER_PARTITION_PARAM_TYPE *lpt,
                            uint next_entry,
                            const char *from_path,
                            const char *to_path);
+
 #else
 #define partition_key_modified(X,Y) 0
 #endif

--- a/sql/sql_partition_admin.cc
+++ b/sql/sql_partition_admin.cc
@@ -192,10 +192,8 @@ static bool check_exchange_partition(TABLE *table, TABLE *part_table)
  @param part_table Partitioned table.
  @param part_elem  Partition element to use for partition specific compare.
 */
-static bool compare_table_with_partition(THD *thd, TABLE *table,
-                                         TABLE *part_table,
-                                         partition_element *part_elem,
-                                         uint part_id)
+bool compare_table_with_partition(THD *thd, TABLE *table, TABLE *part_table,
+                                  partition_element *part_elem, uint part_id)
 {
  HA_CREATE_INFO table_create_info, part_create_info;
  Alter_info part_alter_info;
@@ -292,7 +290,7 @@ static bool compare_table_with_partition(THD *thd, TABLE *table,
    The workaround is to use REORGANIZE PARTITION to rewrite
    the frm file and then use EXCHANGE PARTITION when they are the same.
  */
-  if (compare_partition_options(&table_create_info, part_elem))
+  if (part_elem && compare_partition_options(&table_create_info, part_elem))
    DBUG_RETURN(TRUE);

  DBUG_RETURN(FALSE);
@@ -988,4 +986,53 @@ bool Sql_cmd_alter_table_truncate_partition::execute(THD *thd)
  DBUG_RETURN(error);
 }

+
+/**
+  Move a table specified in the CONVERT TABLE <table_name> TO PARTITION ...
+  to the new partition.
+
+  @param lpt  A structure containing parameters regarding to the statement
+              ALTER TABLE ... TO PARTITION ...
+  @param part_file_name  a file name of the partition being added
+
+  @return false on success, true on error
+*/
+
+bool alter_partition_convert_in(ALTER_PARTITION_PARAM_TYPE *lpt)
+{
+  char part_file_name[2*FN_REFLEN+1];
+  THD *thd= lpt->thd;
+  const char *path= lpt->table_list->table->s->path.str;
+  TABLE_LIST *table_from= lpt->table_list->next_local;
+
+  const char *partition_name=
+    thd->lex->part_info->curr_part_elem->partition_name;
+
+  if (create_partition_name(part_file_name, sizeof(part_file_name), path,
+                            partition_name, NORMAL_PART_NAME, false))
+    return true;
+
+  char from_file_name[FN_REFLEN+1];
+
+  build_table_filename(from_file_name, sizeof(from_file_name),
+                       table_from->db.str, table_from->table_name.str, "", 0);
+
+  handler *file= get_new_handler(nullptr, thd->mem_root,
+                                 table_from->table->file->ht);
+  if (unlikely(!file))
+    return true;
+
+  close_all_tables_for_name(thd, table_from->table->s,
+                            HA_EXTRA_PREPARE_FOR_RENAME, nullptr);
+
+  bool res= file->ha_rename_table(from_file_name, part_file_name);
+
+  if (res)
+    my_error(ER_ERROR_ON_RENAME, MYF(0), from_file_name,
+             part_file_name, my_errno);
+
+  delete file;
+  return res;
+}
+
 #endif /* WITH_PARTITION_STORAGE_ENGINE */
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -875,7 +875,6 @@ bool mysql_write_frm(ALTER_PARTITION_PARAM_TYPE *lpt, uint flags)
 #else /* !WITH_PARTITION_STORAGE_ENGINE */
  DBUG_ASSERT(!(flags & WFRM_WRITE_EXTRACTED));
  DBUG_ASSERT(!(flags & WFRM_BACKUP_ORIGINAL));
-  DBUG_ASSERT(!(flags & WFRM_DROP_BACKUP));
 #endif /* !WITH_PARTITION_STORAGE_ENGINE */
  if (flags & WFRM_INSTALL_SHADOW)
  {
@@ -9688,7 +9687,8 @@ bool mysql_alter_table(THD *thd, const LEX_CSTRING *new_db,
        Table maybe does not exist, but we got an exclusive lock
        on the name, now we can safely try to find out for sure.
      */
-      if (ha_table_exists(thd, &alter_ctx.new_db, &alter_ctx.new_name))
+      if (!(alter_info->partition_flags & ALTER_PARTITION_CONVERT_IN) &&
+          ha_table_exists(thd, &alter_ctx.new_db, &alter_ctx.new_name))
      {
        /* Table will be closed in do_command() */
        my_error(ER_TABLE_EXISTS_ERROR, MYF(0), alter_ctx.new_alias.str);

--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -7290,6 +7290,43 @@ alter_commands:
              MYSQL_YYABORT;
            lex->alter_info.partition_flags|= ALTER_PARTITION_CONVERT_OUT;
          }
+        | CONVERT_SYM TABLE_SYM table_ident
+          {
+            LEX *lex= Lex;
+            if (!lex->first_select_lex()->add_table_to_list(thd, $3, nullptr, 0,
+                                                            TL_READ_NO_INSERT,
+                                                            MDL_SHARED_NO_WRITE))
+              MYSQL_YYABORT;
+
+            /*
+              This will appear as (new_db, new_name) in alter_ctx.
+              new_db will be IX-locked and new_name X-locked.
+            */
+            lex->first_select_lex()->db= $3->db;
+            lex->name= $3->table;
+            if (lex->first_select_lex()->db.str == NULL &&
+                lex->copy_db_to(&lex->first_select_lex()->db))
+              MYSQL_YYABORT;
+
+            lex->part_info= new (thd->mem_root) partition_info();
+            if (unlikely(!lex->part_info))
+              MYSQL_YYABORT;
+
+            lex->part_info->num_parts= 1;
+            /*
+              OR-ed with ALTER_PARTITION_ADD because too many checks of
+              ALTER_PARTITION_ADD required.
+            */
+            lex->alter_info.partition_flags|= ALTER_PARTITION_ADD |
+                                              ALTER_PARTITION_CONVERT_IN;
+          }
+          TO_SYM PARTITION_SYM part_definition
+          {
+            LEX *lex= Lex;
+            lex->m_sql_cmd= new (thd->mem_root) Sql_cmd_alter_table();
+            if (unlikely(lex->m_sql_cmd == NULL))
+              MYSQL_YYABORT;
+          }
        ;

 remove_partitioning: