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--source include/galera_cluster.inc
--source include/have_innodb.inc
#
# Ensure that transactions that do not write anything do not cause the wsrep_last_committed counter to advance
#
# Empty transaction
--connection node_1
CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=InnoDB;
--connection node_2
--let $wsrep_last_committed_before = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
--connection node_1
SET AUTOCOMMIT=OFF;
START TRANSACTION;
COMMIT;
--connection node_2
--let $wsrep_last_committed_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
--disable_query_log
--eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before AS wsrep_last_committed_diff;
--enable_query_log
# START TRANSACTION READ ONLY
--connection node_2
--let $wsrep_last_committed_before = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
--connection node_1
START TRANSACTION READ ONLY;
SELECT COUNT(*) = 0 FROM t1;
COMMIT;
--connection node_2
--let $wsrep_last_committed_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
--disable_query_log
--eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before AS wsrep_last_committed_diff;
--enable_query_log
# Ordinary transaction with only SELECTs
--connection node_1
START TRANSACTION;
SELECT COUNT(*) = 0 FROM t1;
COMMIT;
--connection node_2
--let $wsrep_last_committed_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
--disable_query_log
--eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before AS wsrep_last_committed_diff;
--enable_query_log
DROP TABLE t1;
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