Final push for WL#1098:

"Add a column "Timestamp_of_last_master_event_executed" in SHOW SLAVE STATUS".
Finally this is adding
- Slave_IO_State (a copy of the State column of SHOW PROCESSLIST for the I/O thread,
so that the users, most of the time, has enough info with only SHOW SLAVE STATUS).
- Seconds_behind_master. When the slave connects to the master it does SELECT UNIX_TIMESTAMP()
on the master, computes the absolute difference between the master's and the slave's clock.
It records the timestamp of the last event executed by the SQL thread, and does a
small computation to find the number of seconds by which the slave is late.


mysql-test/r/rpl000015.result:
  result update
mysql-test/r/rpl_empty_master_crash.result:
  result update
mysql-test/r/rpl_error_ignored_table.result:
  result update
mysql-test/r/rpl_flush_log_loop.result:
  result update
mysql-test/r/rpl_loaddata.result:
  result update
mysql-test/r/rpl_log.result:
  result update
mysql-test/r/rpl_log_pos.result:
  result update
mysql-test/r/rpl_max_relay_size.result:
  result update
mysql-test/r/rpl_redirect.result:
  result update
mysql-test/r/rpl_replicate_do.result:
  result update
mysql-test/r/rpl_reset_slave.result:
  result update
mysql-test/r/rpl_rotate_logs.result:
  result update
mysql-test/r/rpl_trunc_binlog.result:
  result update
mysql-test/r/rpl_until.result:
  result update
mysql-test/t/rpl000015.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_empty_master_crash.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_error_ignored_table.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_flush_log_loop.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_loaddata.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_log.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_log_pos.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_max_relay_size.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_openssl.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_redirect.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_replicate_do.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_reset_slave.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_rotate_logs.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_trunc_binlog.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
mysql-test/t/rpl_until.test:
  update to be independant of the new column Seconds_behind_master in SHOW SLAVE STATUS
sql/log_event.cc:
  when the SQL thread executes an event, we record its timestamp
sql/slave.cc:
  in check_master_version() we know read the master's clock, to know the clock difference
  with the slave.
  In show_master_info() we send the state of the I/O thread, and compute the number of
  seconds by which the slave is late.
sql/slave.h:
  timestamp of the last master's event executed by the SQL thread,
  and difference between the clocks of the master and slave.
sql/sql_repl.cc:
  clear the Seconds_behind_master column of SHOW SLAVE STATUS when RESET SLAVE or CHANGE MASTER.

1 files changed, 2 insertions, 2 deletions

diff --git a/mysql-test/r/rpl_flush_log_loop.result b/mysql-test/r/rpl_flush_log_loop.result
index 18e09f33ff7..5b71a68bace 100644
--- a/mysql-test/r/rpl_flush_log_loop.result
+++ b/mysql-test/r/rpl_flush_log_loop.result
@@ -13,5 +13,5 @@ master_password='',master_port=SLAVE_PORT;
 start slave;
 flush logs;
 show slave status;
-Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Replicate_do_table	Replicate_ignore_table	Replicate_wild_do_table	Replicate_wild_ignore_table	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space	Until_condition	Until_Log_File	Until_Log_pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key
-127.0.0.1	root	SLAVE_PORT	60	slave-bin.000001	79	relay-log.000002	4	slave-bin.000001	Yes	Yes							0		0	79	4	None		0	No					
+Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Replicate_do_table	Replicate_ignore_table	Replicate_wild_do_table	Replicate_wild_ignore_table	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space	Until_condition	Until_Log_File	Until_Log_pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_behind_master
+Waiting for master to send event	127.0.0.1	root	SLAVE_PORT	60	slave-bin.000001	79	relay-log.000002	4	slave-bin.000001	Yes	Yes							0		0	79	4	None		0	No						#