1
# For a given event which is at position $master_log_pos in the the master's
2
# binary log, returns its position in the slave's relay log file
4
# The position is stored in the variable $relay_log_pos.
7
# let $relay_log_file= 'relay-log-bin.000001';
8
# let $master_log_pos= 106;
9
# source include/get_relay_log_pos.inc;
10
# # at this point, get_relay_log_pos.inc sets $relay_log_pos. echo position
11
# # in $relay_log_file: $relay_log_pos.
13
if (`SELECT '$relay_log_file' = ''`)
15
--die 'variable $relay_log_file is null'
18
if (`SELECT '$master_log_pos' = ''`)
20
--die 'variable $master_log_pos is null'
23
let $MYSQLD_DATADIR= `select @@datadir`;
24
let $_suffix= `SELECT UUID()`;
25
let $_tmp_file= $MYSQLTEST_VARDIR/tmp/mysqlbinlog.$_suffix;
26
--exec $MYSQL_BINLOG $MYSQLD_DATADIR/$relay_log_file > $_tmp_file
28
# All queries in this file should not be logged.
32
DROP TEMPORARY TABLE IF EXISTS mysqlbinlog_events;
33
DROP TEMPORARY TABLE IF EXISTS events_at;
34
DROP TEMPORARY TABLE IF EXISTS events_pos;
35
CREATE TEMPORARY TABLE mysqlbinlog_events(c1 INT AUTO_INCREMENT KEY, c2 varchar(256));
37
# Event position is in the comments output by mysqlbinlog, we load this
38
# comments into the table
40
# '# .... end_log_pos 46'
41
eval LOAD DATA LOCAL INFILE '$_tmp_file' INTO TABLE mysqlbinlog_events
42
LINES STARTING BY '#' (c2) SET c1 = NULL;
45
# Event pos in relay log file is inserted into table events_at
46
CREATE TEMPORARY TABLE events_at(c1 INT AUTO_INCREMENT KEY, c2 varchar(256))
47
SELECT c2 FROM mysqlbinlog_events WHERE c2 LIKE ' at%' ORDER BY c1;
49
# Event pos in master log file is inserted into table events_pos
50
CREATE TEMPORARY TABLE events_pos(c1 INT AUTO_INCREMENT KEY, c2 varchar(256))
51
SELECT c2 FROM mysqlbinlog_events WHERE c2 LIKE '% end_log_pos %' ORDER BY c1;
53
# events_at events_pos
54
# c1------c2-------------------------- c1------c2------------------------
55
# 1 ev1's begin pos in relay log 1 ev1's end pos in master log
56
# 2 ev2's begin pos in relay log 2 ev2's end pos in master log
57
# 3 ev3's begin pos in relay log 3 ev3's end pos in master log
58
# events always keep the same sequence.
59
# Because event[N]'s end pos is equal to event[N+1]'s begin pos we want to
60
# find event's end pos in relay log, we can find the right relay_log_pos
61
# using the relationship that 'events_pos.c1 = events_at.c1 + 1'
63
# There is a fault that we can't get the relay log position of the last event,
64
# as it is not output by mysqlbinlog
65
let $relay_log_pos= `SELECT SUBSTRING(a.c2, 5)
66
FROM events_at a, events_pos b
67
WHERE a.c1=b.c1+1 and b.c2 LIKE '% $master_log_pos%'`;
68
DROP TEMPORARY TABLE mysqlbinlog_events, events_at, events_pos;
69
--remove_file $_tmp_file
added
removed
mysql-test/include/get_relay_log_pos.inc
