--source include/have_wsrep.inc

--echo #
--echo # wsrep_causal_reads
--echo #

--echo # save the initial values
SET @wsrep_causal_reads_global_saved = @@global.wsrep_causal_reads;
SET @wsrep_causal_reads_session_saved = @@session.wsrep_causal_reads;

--echo # default
SELECT @@global.wsrep_causal_reads;
SELECT @@session.wsrep_causal_reads;

--echo
--echo # scope and valid values
SET @@global.wsrep_causal_reads=OFF;
SELECT @@global.wsrep_causal_reads;
SET @@global.wsrep_causal_reads=ON;
SELECT @@global.wsrep_causal_reads;

SET @@session.wsrep_causal_reads=OFF;
SELECT @@session.wsrep_causal_reads;
SET @@session.wsrep_causal_reads=ON;
SELECT @@session.wsrep_causal_reads;
SET @@session.wsrep_causal_reads=default;
SELECT @@session.wsrep_causal_reads;

--echo
--echo # invalid values
--error ER_WRONG_VALUE_FOR_VAR
SET @@global.wsrep_causal_reads=NULL;
--error ER_WRONG_VALUE_FOR_VAR
SET @@global.wsrep_causal_reads='junk';
--error ER_WRONG_VALUE_FOR_VAR
SET @@session.wsrep_causal_reads=NULL;
--error ER_WRONG_VALUE_FOR_VAR
SET @@session.wsrep_causal_reads='junk';

--echo
--echo # restore the initial values
SET @@global.wsrep_causal_reads = @wsrep_causal_reads_global_saved;
SET @@session.wsrep_causal_reads = @wsrep_causal_reads_session_saved;

--echo # End of test