mariadb/mysql-test/suite/atomic/rename_view.test

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MDEV-23842 Atomic RENAME TABLE - Major rewrite of ddl_log.cc and ddl_log.h - ddl_log.cc described in the beginning how the recovery works. - ddl_log.log has unique signature and is dynamic. It's easy to add more information to the header and other ddl blocks while still being able to execute old ddl entries. - IO_SIZE for ddl blocks is now dynamic. Can be changed without affecting recovery of old logs. - Code is more modular and is now usable outside of partition handling. - Renamed log file to dll_recovery.log and added option --log-ddl-recovery to allow one to specify the path & filename. - Added ddl_log_entry_phase[], number of phases for each DDL action, which allowed me to greatly simply set_global_from_ddl_log_entry() - Changed how strings are stored in log entries, which allows us to store much more information in a log entry. - ddl log is now always created at start and deleted on normal shutdown. This simplices things notable. - Added probes debug_crash_here() and debug_simulate_error() to simply crash testing and allow crash after a given number of times a probe is executed. See comments in debug_sync.cc and rename_table.test for how this can be used. - Reverting failed table and view renames is done trough the ddl log. This ensures that the ddl log is tested also outside of recovery. - Added helper function 'handler::needs_lower_case_filenames()' - Extend binary log with Q_XID events. ddl log handling is using this to check if a ddl log entry was logged to the binary log (if yes, it will be deleted from the log during ddl_log_close_binlogged_events() - If a DDL entry fails 3 time, disable it. This is to ensure that if we have a crash in ddl recovery code the server will not get stuck in a forever crash-restart-crash loop. mysqltest.cc changes: - --die will now replace $variables with their values - $error will contain the error of the last failed statement storage engine changes: - maria_rename() was changed to be more robust against crashes during rename.
2020-10-15 01:25:57 +02:00
--source include/have_debug.inc
--source include/not_valgrind.inc
--source include/not_embedded.inc
#
# Testing of atomic rename with crashes in a lot of different places
#
let $crash_count=4;
let $crash_points='ddl_log_rename_before_rename_view','ddl_log_rename_after_rename_view','rename_view_after_rename_schema_file','definition_file_after_create';
# Number of renames in the tested statement
let $renames=5;
let $old_debug=`select @@debug_dbug`;
let $e=0;
--disable_query_log
create table t1 (a int not null);
create table t2 (b int not null);
create table t3 (c int not null);
create table t4 (d int not null);
insert into t1 values(1);
insert into t2 values(2);
insert into t3 values(3);
insert into t4 values(4);
create view v1 as select t1.a from t1;
create view v2 as select t2.b from t2;
create view v3 as select t3.c from t3;
create view v4 as select t4.d from t4;
flush tables;
let $c=0;
while ($c < $crash_count)
{
inc $c;
let $crash=`select ELT($c, $crash_points)`;
let $r=0;
while ($r < $renames)
{
inc $r;
echo "engine: crash point: $crash position: $r";
--exec echo "restart" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
--disable_reconnect
--eval set @@debug_dbug="+d,$crash",@debug_crash_counter=$r
let $errno=0;
--error 0,2013
rename table v1 to v5, v2 to v1, v5 to v2, v4 to v5, v3 to v4;
let $error=$errno;
--enable_reconnect
--source include/wait_until_connected_again.inc
--disable_query_log
--eval set @@debug_dbug="$old_debug"
if ($error == 0)
{
echo "No crash!";
# No crash, rename things back
rename table v4 to v3, v5 to v4, v2 to v5, v1 to v2, v5 to v1;
}
# Ensure that the tables are back to original
let $res=`select v1.a+v2.b+v3.c+v4.d from v1,v2,v3,v4`;
if ($res != 10)
{
die "Got result $res when 10 was expected";
}
}
}
--echo #
--echo # At last check that rename works when there is no crash
--echo #
rename table v1 to v5, v2 to v1, v5 to v2, v4 to v5, v3 to v4;
let $res=`select (select sum(v1.b) from v1)+ (select sum(v2.a) from v2) + (select sum(v4.c) from v4)+ (select sum(v5.d) from v5)`;
if ($res != 10)
{
die "Got result $res when 10 was expected";
}
drop view v1,v2,v4,v5;
drop table t1,t2,t3,t4;
--enable_query_log