mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 13:02:28 +01:00
74 lines
1.5 KiB
Text
74 lines
1.5 KiB
Text
#
|
|
# Preparatory cleanup.
|
|
#
|
|
DROP TABLE IF EXISTS t1;
|
|
#
|
|
# We need a fixed timestamp to avoid varying results.
|
|
#
|
|
SET timestamp=1000000000;
|
|
#
|
|
# We need big packets.
|
|
#
|
|
SET @@global.max_allowed_packet= 1024*1024*1024;
|
|
#
|
|
# Delete all existing binary logs.
|
|
#
|
|
RESET MASTER;
|
|
#
|
|
# Create a test table.
|
|
#
|
|
CREATE TABLE t1 (
|
|
c1 LONGTEXT
|
|
) ENGINE=MyISAM DEFAULT CHARSET latin1;
|
|
#
|
|
# Show how much rows are affected by each statement.
|
|
#
|
|
#
|
|
# Insert a big row.
|
|
#
|
|
INSERT INTO t1 VALUES (REPEAT('ManyMegaByteBlck', 2097152));
|
|
affected rows: 1
|
|
#
|
|
# Show what we have in the table.
|
|
# Do not display the column value itself, just its length.
|
|
#
|
|
SELECT LENGTH(c1) FROM t1;
|
|
LENGTH(c1) 33554432
|
|
affected rows: 1
|
|
#
|
|
# Grow the row by updating.
|
|
#
|
|
UPDATE t1 SET c1 = CONCAT(c1, c1);
|
|
affected rows: 1
|
|
info: Rows matched: 1 Changed: 1 Warnings: 0
|
|
#
|
|
# Show what we have in the table.
|
|
# Do not display the column value itself, just its length.
|
|
#
|
|
SELECT LENGTH(c1) FROM t1;
|
|
LENGTH(c1) 67108864
|
|
affected rows: 1
|
|
#
|
|
# Delete the row.
|
|
#
|
|
DELETE FROM t1 WHERE c1 >= 'ManyMegaByteBlck';
|
|
affected rows: 1
|
|
#
|
|
# Hide how much rows are affected by each statement.
|
|
#
|
|
#
|
|
# Flush all log buffers to the log file.
|
|
#
|
|
FLUSH LOGS;
|
|
#
|
|
# 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.
|
|
#
|
|
DROP TABLE t1;
|
|
remove_file $MYSQLTEST_VARDIR/tmp/mysqlbinlog_big_1.out
|