test-example-projects/c++_projects/280w-mysql-8.0.18/mysql-test/t/myisam_recover.test

--source include/count_sessions.inc

--echo #
--echo # Tests for corrupted MyISAM tables and MyISAMMRG tables with corrupted
--echo # children..
--echo #
--echo # Run with --myisam-recover=force option.
--echo #
--echo # Preparation: we need to make sure that the merge parent
--echo # is never left in the table cache when closed, since this may
--echo # have effect on merge children.
--echo # For that, we set the table cache to minimal size and populate it
--echo # in a concurrent connection.
connect(con1,localhost,root,,test,,);
--echo #
--echo # Switching to connection con1
--echo #
connection con1;
--echo #
--echo # Minimal values.
--echo #
# MERGE tables require MyISAM tables
--source include/no_valgrind_without_big.inc
--source include/force_myisam_default.inc
--source include/have_myisam.inc

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");
call mtr.add_suppression(" '\..test.t1'");

set @start_table_open_cache=@@global.table_open_cache;
set @start_table_definition_cache=@@global.table_definition_cache;
set global table_open_cache=256;
set global table_definition_cache=400;
--disable_warnings
drop procedure if exists p_create;
--enable_warnings
delimiter |;
create procedure p_create()
begin
  declare i int default 1;
  set @lock_table_stmt="lock table ";
  set @drop_table_stmt="drop table ";
  while i < @@global.table_definition_cache + 1 do
    set @table_name=concat("t_", i);
    set @opt_comma=if(i=1, "", ", ");
    set @lock_table_stmt=concat(@lock_table_stmt, @opt_comma,
                                @table_name, " read");
    set @drop_table_stmt=concat(@drop_table_stmt, @opt_comma, @table_name);
    set @create_table_stmt=concat("create table if not exists ",
                                  @table_name, " (a int)");
    prepare stmt from @create_table_stmt;
    execute stmt;
    deallocate prepare stmt;
    set i= i+1;
  end while;
end|
delimiter ;|
call p_create();
drop procedure p_create;
--disable_query_log
let $lock=`select @lock_table_stmt`;
eval $lock;
--enable_query_log
--echo #
--echo # Switching to connection 'default'
--echo #
connection default;
--echo #
--echo # We have to disable the ps-protocol, to avoid
--echo # "Prepared statement needs to be re-prepared" errors
--echo # -- table def versions change all the time with full table cache.
--echo #
--disable_ps_protocol
--disable_warnings
drop table if exists t1, t1_mrg, t1_copy;
--enable_warnings
let $MYSQLD_DATADIR=`select @@datadir`;
--echo #
--echo # Prepare a MERGE engine table, that refers to a corrupted
--echo # child.
--echo #
create table t1 (a int, key(a)) engine=myisam;
create table t1_mrg (a int) union (t1) engine=merge;
--echo #
--echo # Create a table with a corrupted index file:
--echo # save an old index file, insert more rows,
--echo # overwrite the new index file with the old one.
--echo #
insert into  t1 (a) values (1), (2), (3);
flush table t1;
--copy_file $MYSQLD_DATADIR/test/t1.MYI $MYSQLD_DATADIR/test/t1_copy.MYI
insert into  t1 (a) values (4), (5), (6);
flush table t1;
--remove_file $MYSQLD_DATADIR/test/t1.MYI
--copy_file $MYSQLD_DATADIR/test/t1_copy.MYI $MYSQLD_DATADIR/test/t1.MYI
--remove_file $MYSQLD_DATADIR/test/t1_copy.MYI
--echo # check table is needed to mark the table as crashed.
check table t1;
--echo #
--echo # At this point we have a merge table t1_mrg pointing to t1,
--echo # and t1 is corrupted, and will be auto-repaired at open.
--echo # Check that this doesn't lead to memory corruption.
--echo #
--replace_regex /'.*[\/\\]/'/
select * from t1_mrg;
--echo #
--echo # Cleanup
--echo #
drop table t1, t1_mrg;
--echo #
--echo # Switching to connection con1
--echo #
connection con1;
unlock tables;
prepare stmt from @drop_table_stmt;
execute stmt;
deallocate prepare stmt;
set @@global.table_definition_cache=@start_table_definition_cache;
set @@global.table_open_cache=@start_table_open_cache;
disconnect con1;
connection default;
--enable_ps_protocol

--echo #
--echo # 18075170 - sql node restart required to avoid deadlock after
--echo #            restore
--echo #
--echo # Check that auto-repair for MyISAM tables can now happen in the
--echo # middle of transaction, without aborting it.

connection default;

create table t1 (a int, key(a)) engine=myisam;
create table t2 (a int);
insert into t2 values (1);

--echo # Create a table with a corrupted index file:
--echo # save an old index file, insert more rows,
--echo # overwrite the new index file with the old one.
insert into  t1 (a) values (1);
flush table t1;
--copy_file $MYSQLD_DATADIR/test/t1.MYI $MYSQLD_DATADIR/test/t1_copy.MYI
insert into  t1 (a) values (4);
flush table t1;
--remove_file $MYSQLD_DATADIR/test/t1.MYI
--copy_file $MYSQLD_DATADIR/test/t1_copy.MYI $MYSQLD_DATADIR/test/t1.MYI
--remove_file $MYSQLD_DATADIR/test/t1_copy.MYI

--echo # Check table is needed to mark the table as crashed.
check table t1;

--echo # At this point we have a corrupt t1
set autocommit = 0;
select * from t2;
--echo # Without fix select from t1 will break the transaction. After the fix
--echo # transaction should be active and should hold lock on table t2. Alter
--echo # table from con2 will wait only if the transaction is not broken.
--replace_regex /'.*[\/\\]/'/
select * from t1;

connect(con2, localhost, root);
--SEND ALTER TABLE t2 ADD val INT

connection default;
--echo # With fix we should have alter table waiting for t2 lock here.
let $wait_condition=
  SELECT count(*) = 1 FROM information_schema.processlist WHERE state
  LIKE "Waiting%" AND info = "ALTER TABLE t2 ADD val INT";

--source include/wait_condition.inc
ROLLBACK;
SET autocommit = 1;

connection con2;
--REAP

connection default;
disconnect con2;

--echo # Cleanup
drop table t1, t2;

# Wait till all disconnects are completed
-- source include/wait_until_count_sessions.inc