Post push fix for valgrind warning in ha_partition.cc

Bug#35161
Fixed memory leak when failing to open a partition.

Bug#20129
Added tests for verifying REPAIR PARTITION.

mysql-test/std_data/parts/t1_will_crash#P#p1_first_1024.MYD:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test
  Created by:
  CREATE TABLE t1_will_crash (
    a VARCHAR(255),
    b INT,
    c LONGTEXT,
    PRIMARY KEY (a, b))ENGINE=MyISAM
  PARTITION BY HASH (b)
  PARTITIONS 7;
  INSERT INTO t1_will_crash VALUES ...
  and then
  head -c 1024 var/master-data/test/t1_will_crash#P#p1.MYD
  into this file.
mysql-test/std_data/parts/t1_will_crash#P#p2.MYD:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test)
  copy of file right after _mi_mark_file_changed in mi_write
  was done.
mysql-test/std_data/parts/t1_will_crash#P#p2.MYI:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test)
  copy of file right after _mi_mark_file_changed in mi_write
  was done.
mysql-test/std_data/parts/t1_will_crash#P#p3.MYI:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test)
  copy of file right after *share->write_record was done.
mysql-test/std_data/parts/t1_will_crash#P#p4.MYI:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test)
  copy of file right after flush_cached_blocks
mysql-test/std_data/parts/t1_will_crash#P#p6.MYD:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test)
  copy of file right after _mi_write_part_record in
  write_dynamic_record returned for the first time.
mysql-test/std_data/parts/t1_will_crash#P#p6_2.MYD:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test)
  copy of file right after _mi_write_part_record in
  write_dynamic_record returned for the second time.
mysql-test/std_data/parts/t1_will_crash#P#p6_3.MYD:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  (see mysql-test/suite/parts/t/partition_repair_myisam.test)
  copy of file right after _mi_write_part_record in
  write_dynamic_record returned for the third time.
  (data file fully updated).
mysql-test/suite/parts/r/partition_recover_myisam.result:
  Bug#35161
  
  Renamed since it was a test of recover
  and to make repair free for use without
  --myisam-recover
mysql-test/suite/parts/r/partition_repair_myisam.result:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  New result file for testing CHECK/REPAIR of partitioned tables
mysql-test/suite/parts/t/partition_recover_myisam-master.opt:
  Bug#35161
  
  Renamed since it was a test of recover
  and to make repair free for use without
  --myisam-recover
mysql-test/suite/parts/t/partition_recover_myisam.test:
  Bug#35161
  
  Renamed since it was a test of recover
  and to make repair free for use without
  --myisam-recover
mysql-test/suite/parts/t/partition_repair_myisam.test:
  Bug#20129: ALTER TABLE ... REPAIR PARTITION ... not working
  
  New test file for testing CHECK/REPAIR of partitioned tables
sql/ha_partition.cc:
  Bug#35161
  
  Fix of memory leak when open of partition failed.

mysql-test/suite/parts/r/partition_recover_myisam.result

+CREATE TABLE t1_will_crash (a INT, KEY (a)) ENGINE=MyISAM;
+INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
+FLUSH TABLES;
+# replacing t1.MYI with a corrupt + unclosed one created by doing:
+# 'create table t1 (a int key(a))' head -c1024 t1.MYI > corrupt_t1.MYI 
+SELECT * FROM t1_will_crash;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+Warnings:
+Error	145	Table './test/t1_will_crash' is marked as crashed and should be repaired
+Error	1194	Table 't1_will_crash' is marked as crashed and should be repaired
+Error	1034	1 client is using or hasn't closed the table properly
+Error	1034	Size of indexfile is: 1024        Should be: 2048
+Error	1034	Size of datafile is: 77       Should be: 7
+Error	1034	Number of rows changed from 1 to 11
+DROP TABLE t1_will_crash;
+CREATE TABLE t1_will_crash (a INT, KEY (a))
+ENGINE=MyISAM
+PARTITION BY HASH(a)
+PARTITIONS 3;
+INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
+FLUSH TABLES;
+# replacing t1#P#p1.MYI with a corrupt + unclosed one created by doing:
+# 'create table t1 (a int key(a)) partition by hash (a) partitions 3'
+# head -c1024 t1#P#p1.MYI > corrupt_t1#P#p1.MYI 
+SELECT * FROM t1_will_crash;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+Warnings:
+Error	145	Table './test/t1_will_crash#P#p1' is marked as crashed and should be repaired
+Error	1194	Table 't1_will_crash' is marked as crashed and should be repaired
+Error	1034	1 client is using or hasn't closed the table properly
+Error	1034	Size of indexfile is: 1024        Should be: 2048
+Error	1034	Size of datafile is: 28       Should be: 7
+Error	1034	Number of rows changed from 1 to 4
+DROP TABLE t1_will_crash;

mysql-test/suite/parts/r/partition_repair_myisam.result

+# REPAIR USE_FRM is not implemented for partitioned tables.
+# test of non partitioned myisam for reference
 CREATE TABLE t1_will_crash (a INT, KEY (a)) ENGINE=MyISAM;
 INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
 FLUSH TABLES;
 # replacing t1.MYI with a corrupt + unclosed one created by doing:
 # 'create table t1 (a int key(a))' head -c1024 t1.MYI > corrupt_t1.MYI 
+CHECK TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	error	Size of indexfile is: 1024        Should be: 2048
+test.t1_will_crash	check	warning	Size of datafile is: 77       Should be: 7
+test.t1_will_crash	check	error	Corrupt
+REPAIR TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 1 to 11
+test.t1_will_crash	repair	status	OK
 SELECT * FROM t1_will_crash;
 a
 1
@@ -16,23 +28,29 @@ a
 9
 10
 11
-Warnings:
-Error	145	Table './test/t1_will_crash' is marked as crashed and should be repaired
-Error	1194	Table 't1_will_crash' is marked as crashed and should be repaired
-Error	1034	1 client is using or hasn't closed the table properly
-Error	1034	Size of indexfile is: 1024        Should be: 2048
-Error	1034	Size of datafile is: 77       Should be: 7
-Error	1034	Number of rows changed from 1 to 11
 DROP TABLE t1_will_crash;
+# test of check/repair of a damaged partition's MYI-file
 CREATE TABLE t1_will_crash (a INT, KEY (a))
 ENGINE=MyISAM
-PARTITION BY HASH(a)
+PARTITION BY HASH (a)
 PARTITIONS 3;
 INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
 FLUSH TABLES;
+# test with CHECK/REPAIR TABLE
 # replacing t1#P#p1.MYI with a corrupt + unclosed one created by doing:
 # 'create table t1 (a int key(a)) partition by hash (a) partitions 3'
 # head -c1024 t1#P#p1.MYI > corrupt_t1#P#p1.MYI 
+CHECK TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	error	Size of indexfile is: 1024        Should be: 2048
+test.t1_will_crash	check	warning	Size of datafile is: 28       Should be: 7
+test.t1_will_crash	check	error	Partition p1 returned error
+test.t1_will_crash	check	error	Corrupt
+REPAIR TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 1 to 4
+test.t1_will_crash	repair	status	OK
 SELECT * FROM t1_will_crash;
 a
 1
@@ -46,11 +64,400 @@ a
 9
 10
 11
-Warnings:
-Error	145	Table './test/t1_will_crash#P#p1' is marked as crashed and should be repaired
-Error	1194	Table 't1_will_crash' is marked as crashed and should be repaired
-Error	1034	1 client is using or hasn't closed the table properly
-Error	1034	Size of indexfile is: 1024        Should be: 2048
-Error	1034	Size of datafile is: 28       Should be: 7
-Error	1034	Number of rows changed from 1 to 4
+FLUSH TABLES;
+# test with ALTER TABLE ... CHECK/REPAIR PARTITION
+# replacing t1_will_crash#P#p1.MYI with a corrupt + unclosed one
+ALTER TABLE t1_will_crash CHECK PARTITION p0, p2;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	status	OK
+ALTER TABLE t1_will_crash CHECK PARTITION p0, p1;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	error	Size of indexfile is: 1024        Should be: 2048
+test.t1_will_crash	check	warning	Size of datafile is: 28       Should be: 7
+test.t1_will_crash	check	error	Partition p1 returned error
+test.t1_will_crash	check	error	Corrupt
+ALTER TABLE t1_will_crash CHECK PARTITION p1, p2;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	Table is marked as crashed
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	error	Size of indexfile is: 1024        Should be: 2048
+test.t1_will_crash	check	warning	Size of datafile is: 28       Should be: 7
+test.t1_will_crash	check	error	Partition p1 returned error
+test.t1_will_crash	check	error	Corrupt
+ALTER TABLE t1_will_crash REPAIR PARTITION p0, p2;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	status	OK
+ALTER TABLE t1_will_crash REPAIR PARTITION p0, p1;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 1 to 4
+test.t1_will_crash	repair	status	OK
+SELECT * FROM t1_will_crash;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+DROP TABLE t1_will_crash;
+# test of check/repair of a damaged subpartition's MYI-file
+CREATE TABLE t1_will_crash (a INT, KEY (a))
+ENGINE=MyISAM
+PARTITION BY RANGE (a)
+SUBPARTITION BY HASH (a)
+SUBPARTITIONS 2
+(PARTITION p0 VALUES LESS THAN (7),
+PARTITION p1 VALUES LESS THAN MAXVALUE);
+INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
+SELECT * FROM t1_will_crash;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+FLUSH TABLES;
+# test with CHECK/REPAIR TABLE
+# replacing t1_will_crash#P#p1#SP#p1sp0.MYI with a corrupt + unclosed one
+CHECK TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	error	Size of indexfile is: 1024        Should be: 2048
+test.t1_will_crash	check	warning	Size of datafile is: 14       Should be: 7
+test.t1_will_crash	check	error	Subpartition p1sp0 returned error
+test.t1_will_crash	check	error	Corrupt
+REPAIR TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 1 to 2
+test.t1_will_crash	repair	status	OK
+SELECT * FROM t1_will_crash;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+FLUSH TABLES;
+# test with ALTER TABLE ... CHECK/REPAIR PARTITION
+# replacing t1_will_crash#P#p1#SP#p1sp0.MYI with a corrupt + unclosed one
+ALTER TABLE t1_will_crash CHECK PARTITION p0;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	status	OK
+ALTER TABLE t1_will_crash CHECK PARTITION all;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	error	Size of indexfile is: 1024        Should be: 2048
+test.t1_will_crash	check	warning	Size of datafile is: 14       Should be: 7
+test.t1_will_crash	check	error	Subpartition p1sp0 returned error
+test.t1_will_crash	check	error	Corrupt
+ALTER TABLE t1_will_crash CHECK PARTITION p1;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	Table is marked as crashed
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	error	Size of indexfile is: 1024        Should be: 2048
+test.t1_will_crash	check	warning	Size of datafile is: 14       Should be: 7
+test.t1_will_crash	check	error	Subpartition p1sp0 returned error
+test.t1_will_crash	check	error	Corrupt
+ALTER TABLE t1_will_crash REPAIR PARTITION p0;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	status	OK
+ALTER TABLE t1_will_crash REPAIR PARTITION p0, p1;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 1 to 2
+test.t1_will_crash	repair	status	OK
+SELECT * FROM t1_will_crash;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+DROP TABLE t1_will_crash;
+# test of check/repair of crashed partitions in variuos states
+CREATE TABLE t1_will_crash (
+a VARCHAR(255),
+b INT,
+c LONGTEXT,
+PRIMARY KEY (a, b))
+ENGINE=MyISAM
+PARTITION BY HASH (b)
+PARTITIONS 7;
+SELECT COUNT(*) FROM t1_will_crash;
+COUNT(*)
+33
+SELECT (b % 7) AS partition, COUNT(*) AS rows FROM t1_will_crash GROUP BY (b % 7);
+partition	rows
+0	2
+1	5
+2	5
+3	5
+4	4
+5	4
+6	8
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash ORDER BY partition, b, a;
+partition	b	a	length(c)
+0	0	 lost	64
+0	7	z lost	64
+1	1	abc	64
+1	8	tuw	64
+1	29	kkkkkkkkKkk	64
+1	71	1 broken when head -c1024 on datafile	1024
+1	71	eee	64
+2	2	def	64
+2	9	vxy	64
+2	23	lll	64
+2	30	2 crashed after _mi_mark_changed	64
+2	79	ccc	64
+3	3	ghi	64
+3	10	aaa	64
+3	17	nnn	64
+3	24	3 crashed after write_record	64
+3	73	ddd	64
+4	4	pqr	64
+4	11	bbb	64
+4	18	4 crashed after flush_cached_blocks	64
+4	67	fff	64
+5	5	mno	64
+5	19	mmm	64
+5	40	5 still here since crash in next row in multirow insert?	64
+5	89	a	64
+6	6	jkl	64
+6	13	ooo	64
+6	27	6 row 7 (crash before completely written to datafile)	128
+6	34	6 row 2	64
+6	48	6 row 4	64
+6	62	6 row 6	64
+6	83	 	64
+6	97	zzzzzZzzzzz	64
+FLUSH TABLES;
+# truncating p0 to simulate an empty datafile (not recovered!)
+# replacing p1 with only the first 1024 bytes (not recovered!)
+# replacing p3 with a crashed one at the last row in first insert
+# (crashed right after *share->write_record())
+# replacing p6 with a crashed MYD file (1) (splitted dynamic record)
+ANALYZE TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	analyze	status	OK
+OPTIMIZE TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	optimize	warning	Number of rows changed from 8 to 7
+test.t1_will_crash	optimize	status	OK
+CHECK TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	error	Size of datafile is: 0         Should be: 164
+test.t1_will_crash	check	error	Partition p0 returned error
+test.t1_will_crash	check	error	Corrupt
+REPAIR TABLE t1_will_crash;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 2 to 0
+test.t1_will_crash	repair	info	Found block that points outside data file at 344
+test.t1_will_crash	repair	warning	Number of rows changed from 5 to 4
+test.t1_will_crash	repair	warning	Number of rows changed from 0 to 5
+test.t1_will_crash	repair	status	OK
+SELECT COUNT(*) FROM t1_will_crash;
+COUNT(*)
+29
+SELECT (b % 7) AS partition, COUNT(*) AS rows FROM t1_will_crash GROUP BY (b % 7);
+partition	rows
+1	4
+2	5
+3	5
+4	4
+5	4
+6	7
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash ORDER BY partition, b, a;
+partition	b	a	length(c)
+1	1	abc	64
+1	8	tuw	64
+1	29	kkkkkkkkKkk	64
+1	71	eee	64
+2	2	def	64
+2	9	vxy	64
+2	23	lll	64
+2	30	2 crashed after _mi_mark_changed	64
+2	79	ccc	64
+3	3	ghi	64
+3	10	aaa	64
+3	17	nnn	64
+3	24	3 crashed after write_record	64
+3	73	ddd	64
+4	4	pqr	64
+4	11	bbb	64
+4	18	4 crashed after flush_cached_blocks	64
+4	67	fff	64
+5	5	mno	64
+5	19	mmm	64
+5	40	5 still here since crash in next row in multirow insert?	64
+5	89	a	64
+6	6	jkl	64
+6	13	ooo	64
+6	34	6 row 2	64
+6	48	6 row 4	64
+6	62	6 row 6	64
+6	83	 	64
+6	97	zzzzzZzzzzz	64
+FLUSH TABLES;
+#
+# replacing p2 with crashed files (after _mi_mark_changed)
+ALTER TABLE t1_will_crash CHECK PARTITION p2;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	status	OK
+# crash was when index only marked as opened, no real corruption
+ALTER TABLE t1_will_crash CHECK PARTITION p2;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	status	OK
+FLUSH TABLES;
+#
+# replacing p4 with updated but not closed index file
+ALTER TABLE t1_will_crash OPTIMIZE PARTITION p4;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	optimize	error	Found key at page 2048 that points to record outside datafile
+test.t1_will_crash	optimize	error	Partition p4 returned error
+test.t1_will_crash	optimize	status	Operation failed
+ALTER TABLE t1_will_crash CHECK PARTITION p4;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	Table is marked as crashed and last repair failed
+test.t1_will_crash	check	warning	1 client is using or hasn't closed the table properly
+test.t1_will_crash	check	warning	Size of datafile is: 368       Should be: 252
+test.t1_will_crash	check	error	Found 4 keys of 3
+test.t1_will_crash	check	error	Partition p4 returned error
+test.t1_will_crash	check	error	Corrupt
+ALTER TABLE t1_will_crash REPAIR PARTITION p4;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 3 to 4
+test.t1_will_crash	repair	status	OK
+FLUSH TABLES;
+#
+# replacing p6 with a crashed MYD file (2) (splitted dynamic record)
+ALTER TABLE t1_will_crash CHECK PARTITION p6;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	Size of datafile is: 868       Should be: 604
+test.t1_will_crash	check	error	Unexpected byte: 0 at link: 340
+test.t1_will_crash	check	error	Partition p6 returned error
+test.t1_will_crash	check	error	Corrupt
+ALTER TABLE t1_will_crash REPAIR PARTITION p6;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	info	Delete link points outside datafile at 340
+test.t1_will_crash	repair	info	Delete link points outside datafile at 340
+test.t1_will_crash	repair	status	OK
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash
+WHERE (b % 7) = 6
+ORDER BY partition, b, a;
+partition	b	a	length(c)
+6	6	jkl	64
+6	13	ooo	64
+6	34	6 row 2	64
+6	48	6 row 4	64
+6	62	6 row 6	64
+6	83	 	64
+6	97	zzzzzZzzzzz	64
+FLUSH TABLES;
+#
+# replacing p6 with a crashed MYD file (3) (splitted dynamic record)
+# Different results from the corrupt table, which can lead to dropping
+# of the not completely written rows when using REBUILD on a corrupt
+# table, depending if one reads via index or direct on datafile.
+# Since crash when reuse of deleted row space, CHECK MEDIUM or EXTENDED
+# is required (MEDIUM is default) to verify correct behavior!
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash
+WHERE (b % 7) = 6
+ORDER BY partition, b, a;
+partition	b	a	length(c)
+6	6	jkl	64
+6	13	ooo	64
+6	34	6 row 2	64
+6	83	 	64
+6	97	zzzzzZzzzzz	64
+SELECT (b % 7) AS partition, b, a FROM (SELECT b,a FROM t1_will_crash) q
+WHERE (b % 7) = 6
+ORDER BY partition, b, a;
+partition	b	a
+6	6	jkl
+6	13	ooo
+6	34	6 row 2
+6	48	6 row 4
+6	62	6 row 6
+6	83	 
+6	97	zzzzzZzzzzz
+ALTER TABLE t1_will_crash CHECK PARTITION p6;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	warning	Size of datafile is: 868       Should be: 604
+test.t1_will_crash	check	error	Record-count is not ok; is 8   Should be: 7
+test.t1_will_crash	check	warning	Found 10 key parts. Should be: 7
+test.t1_will_crash	check	error	Partition p6 returned error
+test.t1_will_crash	check	error	Corrupt
+ALTER TABLE t1_will_crash REPAIR PARTITION p6;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	repair	warning	Number of rows changed from 7 to 8
+test.t1_will_crash	repair	status	OK
+SELECT COUNT(*) FROM t1_will_crash;
+COUNT(*)
+29
+SELECT (b % 7) AS partition, COUNT(*) AS rows FROM t1_will_crash GROUP BY (b % 7);
+partition	rows
+1	4
+2	4
+3	5
+4	4
+5	4
+6	8
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash ORDER BY partition, b, a;
+partition	b	a	length(c)
+1	1	abc	64
+1	8	tuw	64
+1	29	kkkkkkkkKkk	64
+1	71	eee	64
+2	2	def	64
+2	9	vxy	64
+2	23	lll	64
+2	79	ccc	64
+3	3	ghi	64
+3	10	aaa	64
+3	17	nnn	64
+3	24	3 crashed after write_record	64
+3	73	ddd	64
+4	4	pqr	64
+4	11	bbb	64
+4	18	4 crashed after flush_cached_blocks	64
+4	67	fff	64
+5	5	mno	64
+5	19	mmm	64
+5	40	5 still here since crash in next row in multirow insert?	64
+5	89	a	64
+6	6	jkl	64
+6	13	ooo	64
+6	27	6 row 7 (crash before completely written to datafile)	128
+6	34	6 row 2	64
+6	48	6 row 4	64
+6	62	6 row 6	64
+6	83	 	64
+6	97	zzzzzZzzzzz	64
+ALTER TABLE t1_will_crash CHECK PARTITION all EXTENDED;
+Table	Op	Msg_type	Msg_text
+test.t1_will_crash	check	status	OK
 DROP TABLE t1_will_crash;

mysql-test/suite/parts/t/partition_recover_myisam.test

+# test the auto-recover (--myisam-recover) of partitioned myisam tables
+--source include/have_partition.inc
+--disable_warnings
+--disable_query_log
+drop table if exists t1_will_crash;
+--enable_query_log
+--enable_warnings
+
+
+CREATE TABLE t1_will_crash (a INT, KEY (a)) ENGINE=MyISAM;
+INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
+FLUSH TABLES;
+--echo # replacing t1.MYI with a corrupt + unclosed one created by doing:
+--echo # 'create table t1 (a int key(a))' head -c1024 t1.MYI > corrupt_t1.MYI 
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash.MYI
+--copy_file std_data/corrupt_t1.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash.MYI
+SELECT * FROM t1_will_crash;
+DROP TABLE t1_will_crash;
+CREATE TABLE t1_will_crash (a INT, KEY (a))
+ENGINE=MyISAM
+PARTITION BY HASH(a)
+PARTITIONS 3;
+INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
+FLUSH TABLES;
+--echo # replacing t1#P#p1.MYI with a corrupt + unclosed one created by doing:
+--echo # 'create table t1 (a int key(a)) partition by hash (a) partitions 3'
+--echo # head -c1024 t1#P#p1.MYI > corrupt_t1#P#p1.MYI 
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYI
+--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYI
+SELECT * FROM t1_will_crash;
+DROP TABLE t1_will_crash;

mysql-test/suite/parts/t/partition_repair_myisam.test

+# test of check/repair of partitioned myisam tables
 --source include/have_partition.inc
 --disable_warnings
 --disable_query_log
@@ -5,7 +6,9 @@ drop table if exists t1_will_crash;
 --enable_query_log
 --enable_warnings
 
+--echo # REPAIR USE_FRM is not implemented for partitioned tables.
 
+--echo # test of non partitioned myisam for reference
 CREATE TABLE t1_will_crash (a INT, KEY (a)) ENGINE=MyISAM;
 INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
 FLUSH TABLES;
@@ -13,18 +16,227 @@ FLUSH TABLES;
 --echo # 'create table t1 (a int key(a))' head -c1024 t1.MYI > corrupt_t1.MYI 
 --remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash.MYI
 --copy_file std_data/corrupt_t1.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash.MYI
+CHECK TABLE t1_will_crash;
+REPAIR TABLE t1_will_crash;
 SELECT * FROM t1_will_crash;
 DROP TABLE t1_will_crash;
+
+--echo # test of check/repair of a damaged partition's MYI-file
 CREATE TABLE t1_will_crash (a INT, KEY (a))
 ENGINE=MyISAM
-PARTITION BY HASH(a)
+PARTITION BY HASH (a)
 PARTITIONS 3;
 INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
 FLUSH TABLES;
+--echo # test with CHECK/REPAIR TABLE
 --echo # replacing t1#P#p1.MYI with a corrupt + unclosed one created by doing:
 --echo # 'create table t1 (a int key(a)) partition by hash (a) partitions 3'
 --echo # head -c1024 t1#P#p1.MYI > corrupt_t1#P#p1.MYI 
 --remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYI
 --copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYI
+CHECK TABLE t1_will_crash;
+REPAIR TABLE t1_will_crash;
+SELECT * FROM t1_will_crash;
+FLUSH TABLES;
+--echo # test with ALTER TABLE ... CHECK/REPAIR PARTITION
+--echo # replacing t1_will_crash#P#p1.MYI with a corrupt + unclosed one
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYI
+--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYI
+ALTER TABLE t1_will_crash CHECK PARTITION p0, p2;
+ALTER TABLE t1_will_crash CHECK PARTITION p0, p1;
+ALTER TABLE t1_will_crash CHECK PARTITION p1, p2;
+ALTER TABLE t1_will_crash REPAIR PARTITION p0, p2;
+ALTER TABLE t1_will_crash REPAIR PARTITION p0, p1;
+SELECT * FROM t1_will_crash;
+DROP TABLE t1_will_crash;
+
+--echo # test of check/repair of a damaged subpartition's MYI-file
+CREATE TABLE t1_will_crash (a INT, KEY (a))
+ENGINE=MyISAM
+PARTITION BY RANGE (a)
+SUBPARTITION BY HASH (a)
+SUBPARTITIONS 2
+(PARTITION p0 VALUES LESS THAN (7),
+ PARTITION p1 VALUES LESS THAN MAXVALUE);
+INSERT INTO t1_will_crash VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11);
 SELECT * FROM t1_will_crash;
+FLUSH TABLES;
+--echo # test with CHECK/REPAIR TABLE
+--echo # replacing t1_will_crash#P#p1#SP#p1sp0.MYI with a corrupt + unclosed one
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1#SP#p1sp0.MYI
+--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1#SP#p1sp0.MYI
+CHECK TABLE t1_will_crash;
+REPAIR TABLE t1_will_crash;
+SELECT * FROM t1_will_crash;
+FLUSH TABLES;
+--echo # test with ALTER TABLE ... CHECK/REPAIR PARTITION
+--echo # replacing t1_will_crash#P#p1#SP#p1sp0.MYI with a corrupt + unclosed one
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1#SP#p1sp0.MYI
+--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1#SP#p1sp0.MYI
+ALTER TABLE t1_will_crash CHECK PARTITION p0;
+ALTER TABLE t1_will_crash CHECK PARTITION all;
+ALTER TABLE t1_will_crash CHECK PARTITION p1;
+ALTER TABLE t1_will_crash REPAIR PARTITION p0;
+ALTER TABLE t1_will_crash REPAIR PARTITION p0, p1;
+SELECT * FROM t1_will_crash;
+DROP TABLE t1_will_crash;
+
+--echo # test of check/repair of crashed partitions in variuos states
+CREATE TABLE t1_will_crash (
+  a VARCHAR(255),
+  b INT,
+  c LONGTEXT,
+  PRIMARY KEY (a, b))
+ENGINE=MyISAM
+PARTITION BY HASH (b)
+PARTITIONS 7;
+
+# creating a longer string for for filling the records
+let $i= 3;
+let $lt= longtext;
+while ($i>0)
+{
+  let $lt= $lt$lt;
+  dec $i;
+}
+
+# Tests (mapped to partition)
+# Partition
+# 0 - truncated datafile (size = 0 bytes)
+# 1 - head -c 1024 of datafile (simulates crashed write)
+# 2 - after _mi_mark_file_changed (only marked index as opened)
+# 3 - after write_record (updated datafile + not closed/updated index)
+# 4 - after flush_cached_blocks (updated index/datafiles, not closed index)
+# 5 - (Not used) after mi_state_info_write (fully uppdated/closed index file)
+#     (this was verified to be a harmless crash, since everything was written)
+# 6 - partly updated datafile (insert 6 small records, delete 5,3,1,
+#     insert one larger record (2.5 X small) and break in gdb before it has
+#     been completely written (in write_dynamic_record)
+#     (done with 3 different MYD files, since it also affects
+#      the delete-linked-list)
+
+--disable_query_log
+eval INSERT INTO t1_will_crash VALUES
+  ('abc', 1, '$lt'), ('def', 2, '$lt'), ('ghi', 3, '$lt'), ('jkl', 6, '$lt'),
+  ('mno', 5, '$lt'), ('pqr', 4, '$lt'), ('tuw', 8, '$lt'), ('vxy', 9, '$lt'),
+  ('z lost', 7, '$lt'), ('aaa', 10, '$lt'), ('bbb', 11, '$lt'),
+  ('zzzzzZzzzzz', 97, '$lt'), ('a', 89, '$lt'), (' ', 83, '$lt'),
+  ('ccc', 79, '$lt'), ('ddd', 73, '$lt'), ('eee', 71, '$lt'),
+  ('fff', 67, '$lt'), ('ooo', 13, '$lt'), ('nnn', 17, '$lt'),
+  ('mmm', 19, '$lt'), ('lll', 23, '$lt'), ('kkkkkkkkKkk', 29, '$lt'),
+  (' lost', 0, '$lt'), ('1 broken when head -c1024 on datafile', 71,
+    '$lt$lt$lt$lt$lt$lt$lt$lt$lt$lt$lt$lt$lt$lt$lt$lt'),
+  ('3 crashed after write_record', 24, '$lt');
+eval INSERT INTO t1_will_crash VALUES
+  ('2 crashed after _mi_mark_changed', 30, '$lt');
+# if crashed here, part p5 would need to be repaired before next statement
+# but since we use pre fabricated crashed files, we can skip that here.
+eval INSERT INTO t1_will_crash VALUES
+  ('5 still here since crash in next row in multirow insert?', 40, '$lt'),
+  ('4 crashed after flush_cached_blocks', 18, '$lt');
+# There is no write after mi_state_info_write, so this is not tested.
+#eval INSERT INTO t1_will_crash VALUES
+#  ('5 crashed after mi_state_info_write', 12, '$lt');
+eval INSERT INTO t1_will_crash VALUES
+  ('6 row 1', 27, '$lt'), ('6 row 2', 34, '$lt'),
+  ('6 row 3', 41, '$lt'), ('6 row 4', 48, '$lt'),
+  ('6 row 5', 55, '$lt'), ('6 row 6', 62, '$lt');
+DELETE FROM t1_will_crash WHERE b in (27, 55);
+DELETE FROM t1_will_crash WHERE b = 41;
+eval INSERT INTO t1_will_crash VALUES
+  ('6 row 7 (crash before completely written to datafile)', 27, '$lt$lt');
+--enable_query_log
+SELECT COUNT(*) FROM t1_will_crash;
+SELECT (b % 7) AS partition, COUNT(*) AS rows FROM t1_will_crash GROUP BY (b % 7);
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash ORDER BY partition, b, a;
+FLUSH TABLES;
+# testing p0, p1, p3, p6(1)
+--echo # truncating p0 to simulate an empty datafile (not recovered!)
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p0.MYD
+--write_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p0.MYD
+EOF
+
+--echo # replacing p1 with only the first 1024 bytes (not recovered!)
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYD
+--copy_file std_data/parts/t1_will_crash#P#p1_first_1024.MYD $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p1.MYD
+
+--echo # replacing p3 with a crashed one at the last row in first insert
+--echo # (crashed right after *share->write_record())
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p3.MYI
+--copy_file std_data/parts/t1_will_crash#P#p3.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p3.MYI
+
+--echo # replacing p6 with a crashed MYD file (1) (splitted dynamic record)
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p6.MYD
+--copy_file std_data/parts/t1_will_crash#P#p6.MYD $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p6.MYD
+ANALYZE TABLE t1_will_crash;
+OPTIMIZE TABLE t1_will_crash;
+CHECK TABLE t1_will_crash;
+REPAIR TABLE t1_will_crash;
+SELECT COUNT(*) FROM t1_will_crash;
+SELECT (b % 7) AS partition, COUNT(*) AS rows FROM t1_will_crash GROUP BY (b % 7);
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash ORDER BY partition, b, a;
+FLUSH TABLES;
+
+# testing p2, p4, p6(2, 3)
+--echo #
+--echo # replacing p2 with crashed files (after _mi_mark_changed)
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p2.MYI
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p2.MYD
+--copy_file std_data/parts/t1_will_crash#P#p2.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p2.MYI
+--copy_file std_data/parts/t1_will_crash#P#p2.MYD $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p2.MYD
+ALTER TABLE t1_will_crash CHECK PARTITION p2;
+--echo # crash was when index only marked as opened, no real corruption
+ALTER TABLE t1_will_crash CHECK PARTITION p2;
+FLUSH TABLES;
+
+--echo #
+--echo # replacing p4 with updated but not closed index file
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p4.MYI
+--copy_file std_data/parts/t1_will_crash#P#p4.MYI $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p4.MYI
+#SHOW TABLE STATUS like 't1_will_crash';
+#ALTER TABLE t1_will_crash ANALYZE PARTITION p4;
+#SHOW TABLE STATUS like 't1_will_crash';
+ALTER TABLE t1_will_crash OPTIMIZE PARTITION p4;
+#SHOW TABLE STATUS like 't1_will_crash';
+ALTER TABLE t1_will_crash CHECK PARTITION p4;
+#SHOW TABLE STATUS like 't1_will_crash';
+ALTER TABLE t1_will_crash REPAIR PARTITION p4;
+#SHOW TABLE STATUS like 't1_will_crash';
+FLUSH TABLES;
+
+--echo #
+--echo # replacing p6 with a crashed MYD file (2) (splitted dynamic record)
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p6.MYD
+--copy_file std_data/parts/t1_will_crash#P#p6_2.MYD $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p6.MYD
+#ALTER TABLE t1_will_crash OPTIMIZE PARTITION p6;
+ALTER TABLE t1_will_crash CHECK PARTITION p6;
+ALTER TABLE t1_will_crash REPAIR PARTITION p6;
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash
+WHERE (b % 7) = 6
+ORDER BY partition, b, a;
+FLUSH TABLES;
+
+--echo #
+--echo # replacing p6 with a crashed MYD file (3) (splitted dynamic record)
+--remove_file $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p6.MYD
+--copy_file std_data/parts/t1_will_crash#P#p6_3.MYD $MYSQLTEST_VARDIR/master-data/test/t1_will_crash#P#p6.MYD
+--echo # Different results from the corrupt table, which can lead to dropping
+--echo # of the not completely written rows when using REBUILD on a corrupt
+--echo # table, depending if one reads via index or direct on datafile.
+--echo # Since crash when reuse of deleted row space, CHECK MEDIUM or EXTENDED
+--echo # is required (MEDIUM is default) to verify correct behavior!
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash
+WHERE (b % 7) = 6
+ORDER BY partition, b, a;
+SELECT (b % 7) AS partition, b, a FROM (SELECT b,a FROM t1_will_crash) q
+WHERE (b % 7) = 6
+ORDER BY partition, b, a;
+# NOTE: REBUILD PARTITION without CHECK before, 2 + (1) records will be lost!
+#ALTER TABLE t1_will_crash REBUILD PARTITION p6;
+ALTER TABLE t1_will_crash CHECK PARTITION p6;
+ALTER TABLE t1_will_crash REPAIR PARTITION p6;
+SELECT COUNT(*) FROM t1_will_crash;
+SELECT (b % 7) AS partition, COUNT(*) AS rows FROM t1_will_crash GROUP BY (b % 7);
+SELECT (b % 7) AS partition, b, a, length(c) FROM t1_will_crash ORDER BY partition, b, a;
+ALTER TABLE t1_will_crash CHECK PARTITION all EXTENDED;
 DROP TABLE t1_will_crash;

sql/ha_partition.cc

@@ -2494,6 +2494,8 @@ int ha_partition::open(const char *name, int mode, uint test_if_locked)
 err_handler:
   while (file-- != m_file)
     (*file)->close();
+  if (!is_clone)
+    bitmap_free(&(m_part_info->used_partitions));
 
   DBUG_RETURN(error);
 }