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fix MDEV-18750: failed to flashback large-size binlog file

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fix MDEV-18750: failed to flashback large-size binlog file

fix mysqlbinlog flashback failure caused by reading io_cache without MY_FULL_IO flag

fix MDEV-18750: mysqlbinlog flashback failure on large binlog
This commit is contained in:
Zicheng Huang
2019-02-27 08:31:35 +00:00
committed by Oleksandr "Sanja" Byelkin
parent b4287ec386
commit d7c8423a3d
3 changed files with 185 additions and 4 deletions
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71
mysql-test/suite/binlog/r/flashback-largebinlog.result Normal file
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#
# Preparatory cleanup.
#
drop database if exists mysqltest;
create database mysqltest;
use mysqltest;
DROP TABLE IF EXISTS t1;
#
# We need a fixed timestamp to avoid varying results.
#
SET timestamp=1000000000;
#
# We need big packets.
#
# Capture initial value to reset at the end of the test
# Now adjust max_allowed_packet
SET @@global.max_allowed_packet= 10*1024*1024*1024;
Warnings:
Warning 1292 Truncated incorrect max_allowed_packet value: '10737418240'
max_allowed_packet is a global variable.
In order for the preceding change in max_allowed_packets' value
to be seen and used, we must start a new connection.
The change does not take effect with the current one.
For simplicity, we just disconnect / reconnect connection default here.
disconnect default;
connect default, localhost,root,,;
#
# Delete all existing binary logs.
#
RESET MASTER;
#
# Create a test table.
#
use mysqltest;
CREATE TABLE t1 (
c1 LONGTEXT
) DEFAULT CHARSET latin1;
#
# Show how many rows are affected by each statement.
#
#
# Insert some big rows.
#
insert 1024MB data twice
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 67108864));
affected rows: 1
INSERT INTO t1 VALUES (REPEAT('MegaByteBlckMany', 67108864));
affected rows: 1
#
# Flush all log buffers to the log file.
#
FLUSH LOGS;
affected rows: 0
#
# Call mysqlbinlog to display the log file contents.
# NOTE: The output of mysqlbinlog is redirected to
# $MYSQLTEST_VARDIR/tmp/mysqlbinlog_big_1.out
# If you want to examine it, disable remove_file
# at the bottom of the test script.
#
#
# Cleanup.
#
# reset variable value to pass testcase checks
SET @@global.max_allowed_packet = 16777216;
affected rows: 0
DROP TABLE t1;
affected rows: 0
drop database if exists mysqltest;
affected rows: 0
remove_file $MYSQLTEST_VARDIR/tmp/mysqlbinlog_big_1.out