mariadb/mysql-test/t/maria-recovery.test

--source include/not_embedded.inc
# Don't test this under valgrind, memory leaks will occur as we crash
--source include/not_valgrind.inc
# Binary must be compiled with debug for crash to occur
--source include/have_debug.inc
--source include/have_maria.inc

--disable_warnings
drop database if exists mysqltest;
--enable_warnings
create database mysqltest;

# Include scripts can perform SQL. For it to not influence the main test
# they use a separate connection. This way if they use a DDL it would
# not autocommit in the main test.
connect (admin, 127.0.0.1, root,,mysqltest,,);
--enable_reconnect

connection default;
use mysqltest;
--enable_reconnect

# A sample test
-- source include/maria_empty_logs.inc
let $mms_tables=1;
create table t1 (a varchar(1000)) engine=maria;

--echo * TEST: see if recovery can reconstruct if we give it an old table

-- source include/maria_make_snapshot_for_feeding_recovery.inc
# Your committed statements here, which we expect to
# be reconstructed from the log
insert into t1 values ("00000000");
-- source include/maria_make_snapshot_for_comparison.inc
# Your statements which should not commit and we expect to be rolled back
lock tables t1 write;
insert into t1 values ("aaaaaaaaa");
# we want recovery to run on the first snapshot made above
let $mvr_restore_old_snapshot=1;
# the script below will trigger recovery and compare checksums
let $mvr_debug_option="+d,maria_flush_whole_log,maria_crash";
-- source include/maria_verify_recovery.inc
# so a SELECT like this is pure visual effect, brings nothing.
select * from t1;

--echo * TEST: normal recovery test (no moving tables under its feet)

# different types of crash => a loop; here are loop control variables
let $crash_no_flush=1;
let $crash_flush_whole_page_cache=0;
let $crash_flush_states=0;
let $crash_flush_whole_log=0;
let $crash_loop=1;

# we want recovery to use the tables as they were at time of crash
let $mvr_restore_old_snapshot=0;

# Note that we don't remove logs between iterations. Test is
# cumulative (each new recovery processes more log records than the previous).

while ($crash_loop)
{
  if ($crash_flush_whole_log)
  {
     let $mvr_debug_option="+d,maria_flush_whole_log,maria_crash";
     # set up what next iteration should do:
     let $crash_flush_whole_log=0;
     let $crash_loop=0;
  }
  if ($crash_flush_states)
  {
     let $mvr_debug_option="+d,maria_flush_states,maria_flush_whole_log,maria_crash";
     let $crash_flush_states=0;
     let $crash_flush_whole_log=1;
  }
  if ($crash_flush_whole_page_cache)
  {
     let $mvr_debug_option="+d,maria_flush_whole_page_cache,maria_crash";
     let $crash_flush_whole_page_cache=0;
     let $crash_flush_states=1;
  }
  if ($crash_no_flush)
  {
     let $mvr_debug_option="+d,maria_crash";
     let $crash_no_flush=0;
     let $crash_flush_whole_page_cache=1;
  }
  # Your committed statements here
  insert into t1 values ("00000000");
  -- source include/maria_make_snapshot_for_comparison.inc
  # Your statements which we expect to be rolled back
  lock tables t1 write;
  insert into t1 values ("aaaaaaaaa");
  -- source include/maria_verify_recovery.inc
  select * from t1;
}

drop table t1;

# what did we compare above:
# - checksum: tells that the tables contain the same amount of rows
# and same data in rows
# - index: no, neither state nor pages were compared
# - bitmap pages: the REPAIR QUICK done above very probably checks
# that bitmap reflects page occupation; do we need to do physical
# compare?
# - page LSN: not compared; we should compare that page's LSN in new
# table is >= page's LSN in old table (it can be >, due to UNDO phase)
# we had a bug where new page's LSN was 0... todo.

#
# Test problem where an UPDATE purges and rewrites a tail page, and
# recovery applied the purge, stamped page with UNDO's LSN, thus
# the rewrite was ignored.
#

-- source include/maria_empty_logs.inc
let $mms_tables=1;
CREATE TABLE t1 (
  i int,
  b blob default NULL,
  c varchar(6000) default NULL
) ENGINE=MARIA CHECKSUM=1;
-- source include/maria_make_snapshot_for_feeding_recovery.inc
INSERT INTO t1 VALUES (1, REPEAT('a', 5000), REPEAT('b', 5000));
UPDATE t1 SET i=3, b=CONCAT(b,'c') WHERE i=1;
SELECT LENGTH(b) FROM t1 WHERE i=3;
-- source include/maria_make_snapshot_for_comparison.inc
# we want recovery to run on the first snapshot made above
let $mvr_restore_old_snapshot=1;
let $mvr_debug_option="+d,maria_flush_whole_log,maria_crash";
-- source include/maria_verify_recovery.inc
SELECT LENGTH(b) FROM t1 WHERE i=3;
drop table t1;

# clean up everything
let $mms_purpose=feeding_recovery;
eval drop database mysqltest_for_$mms_purpose;
let $mms_purpose=comparison;
eval drop database mysqltest_for_$mms_purpose;
drop database mysqltest;