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>

Author: midenok

mysql-test/suite/atomic/alter_partition,innodb.rdiff

@@ -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;

mysql-test/suite/atomic/alter_partition.result

@@ -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;

mysql-test/suite/atomic/alter_partition.test

@@ -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;