--echo #
--echo # WL#9763: Support option to RESET PERSIST
--echo #

--source include/have_debug_sync.inc

--echo # Syntax check for RESET PERSIST
RESET PERSIST;
--error ER_VAR_DOES_NOT_EXIST
RESET PERSIST max_connections;
RESET PERSIST IF EXISTS max_connections;
--error ER_PARSE_ERROR
RESET PERSIST IF EXISTS;
--error ER_PARSE_ERROR
RESET PERSIST IF EXISTS max_connections, long_query_time;
--error ER_PARSE_ERROR
RESET PERSIST max_connections, long_query_time;

let $MYSQLD_DATADIR= `select @@datadir`;

--echo # check contents of persistent config file
SET PERSIST sort_buffer_size=256000;
SET PERSIST long_query_time= 8.3452;
select * from performance_schema.persisted_variables ORDER BY 1;
RESET PERSIST;
--echo # config file should be empty
select * from performance_schema.persisted_variables ORDER BY 1;

--echo # add few more to config file and reset
SET PERSIST sort_buffer_size=156000,max_connections= 52;
SET PERSIST max_heap_table_size=887808, slave_net_timeout=160;
SET PERSIST long_query_time= 7.8102;
select * from performance_schema.persisted_variables ORDER BY 1;
RESET PERSIST max_heap_table_size;
RESET PERSIST sort_buffer_size;
select * from performance_schema.persisted_variables ORDER BY 1;

RESET PERSIST IF EXISTS slave_net_timeout;
select * from performance_schema.persisted_variables ORDER BY 1;

SET PERSIST join_buffer_size= 262144;
select * from performance_schema.persisted_variables ORDER BY 1;
RESET PERSIST;
select * from performance_schema.persisted_variables ORDER BY 1;

--echo # check for errors and warnings
# should report warning
RESET PERSIST IF EXISTS sort_buffer_size;
# should report error
--error ER_VAR_DOES_NOT_EXIST
RESET PERSIST sort_buffer_size;

# set all variables to default
SET GLOBAL long_query_time= DEFAULT,
           max_connections= DEFAULT, max_heap_table_size= DEFAULT,
           slave_net_timeout= DEFAULT, sort_buffer_size= DEFAULT,
           join_buffer_size= DEFAULT;
#cleanup
--remove_file $MYSQLD_DATADIR/mysqld-auto.cnf

--echo #
--echo # Bug #27264789: CONCURRENT EXECUTION OF SET/RESET PERSIST CALL CRASHES SERVER
--echo #

connect (conn1,localhost,root,,);
connect (conn2,localhost,root,,);

connection conn1;
# Acquiring LOCK_persist_variables
SET DEBUG_SYNC='in_set_persist_variables SIGNAL set WAIT_FOR go';
--send SET PERSIST max_connections= 38;

connection conn2;
SET DEBUG_SYNC='now WAIT_FOR set';
--send RESET PERSIST IF EXISTS max_connections;

connection default;
# reset persist operation will wait until set persist operation is complete.
SET DEBUG_SYNC='now SIGNAL go';

connection conn1;
--reap

connection conn2;
--reap

connection default;
# return 0
SELECT count(*) FROM performance_schema.persisted_variables
  WHERE variable_name = 'max_connections';
SET DEBUG_SYNC='RESET';
disconnect conn1;
disconnect conn2;

#cleanup
SET GLOBAL max_connections=DEFAULT;
--remove_file $MYSQLD_DATADIR/mysqld-auto.cnf