parts/t/partition_repair_myisam.test

# test of check/repair of partitioned myisam tables
--source include/have_partition.inc
--disable_warnings
--disable_query_log
drop table if exists t1_will_crash;
call mtr.add_suppression("Got an error from thread_id=.*ha_myisam.cc:");
call mtr.add_suppression("MySQL thread id .*, query id .* localhost.*root Checking table");
--enable_query_log
--enable_warnings

--echo # REPAIR USE_FRM is not implemented for partitioned tables.

let $MYSQLD_DATADIR= `select @@datadir`;

--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;
--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 $MYSQLD_DATADIR/test/t1_will_crash.MYI
--copy_file std_data/corrupt_t1.MYI $MYSQLD_DATADIR/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)
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 $MYSQLD_DATADIR/test/t1_will_crash#P#p1.MYI
--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p1.MYI
--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p1#SP#p1sp0.MYI
--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p1#SP#p1sp0.MYI
--copy_file std_data/corrupt_t1#P#p1.MYI $MYSQLD_DATADIR/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)
{
  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 $MYSQLD_DATADIR/test/t1_will_crash#P#p0.MYD
--write_file $MYSQLD_DATADIR/test/t1_will_crash#P#p0.MYD
EOF

--echo # replacing p1 with only the first 1024 bytes (not recovered!)
--remove_file $MYSQLD_DATADIR/test/t1_will_crash#P#p1.MYD
--copy_file std_data/parts/t1_will_crash#P#p1_first_1024.MYD $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p3.MYI
--copy_file std_data/parts/t1_will_crash#P#p3.MYI $MYSQLD_DATADIR/test/t1_will_crash#P#p3.MYI

--echo # replacing p6 with a crashed MYD file (1) (splitted dynamic record)
--remove_file $MYSQLD_DATADIR/test/t1_will_crash#P#p6.MYD
--copy_file std_data/parts/t1_will_crash#P#p6.MYD $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p2.MYI
--remove_file $MYSQLD_DATADIR/test/t1_will_crash#P#p2.MYD
--copy_file std_data/parts/t1_will_crash#P#p2.MYI $MYSQLD_DATADIR/test/t1_will_crash#P#p2.MYI
--copy_file std_data/parts/t1_will_crash#P#p2.MYD $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p4.MYI
--copy_file std_data/parts/t1_will_crash#P#p4.MYI $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p6.MYD
--copy_file std_data/parts/t1_will_crash#P#p6_2.MYD $MYSQLD_DATADIR/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 $MYSQLD_DATADIR/test/t1_will_crash#P#p6.MYD
--copy_file std_data/parts/t1_will_crash#P#p6_3.MYD $MYSQLD_DATADIR/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;