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BUG#12969301 : mysql_plugin: enable is ignored if plugin exists

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This patch changes the mechanism by which the client enables a 
plugin. Instead of using INSERT IGNORE to reload a plugin library,
it now uses REPLACE INTO. This allows users to load a library
multiple times replacing the existing values in the mysql.plugin
table. This allows users to replace the symbol reference to a
different dl name in the table. Thus permitting enabling of 
multiple versions of the same library without first disabling
the old version.

A regression test was added to ensure this feature works.
This commit is contained in:
chuck.bell@oracle.com
2012-01-24 11:08:57 -05:00
parent 73e69d0f8c
commit f3f59aed57
4 changed files with 104 additions and 6 deletions
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77
mysql-test/t/mysql_plugin.test
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@ -155,6 +155,74 @@ eval INSERT INTO mysql.plugin VALUES ('wonky', '$DAEMONEXAMPLE');
--replace_regex /\.dll/.so/
SELECT * FROM mysql.plugin WHERE dl like 'libdaemon%' ORDER BY name;
# MTR will remove this file later, but this might be too late.
--error 0,1
--remove_file $expect_file
--write_file $expect_file
wait
EOF
--shutdown_server 10
--source include/wait_until_disconnected.inc
#
# Disable the plugin - to remove winky, wonky entries
#
--exec $MYSQL_PLUGIN_CMD DISABLE daemon_example
#
# Enable the plugin again
#
--exec $MYSQL_PLUGIN_CMD ENABLE daemon_example
#
# Restart the server
#
--append_file $expect_file
restart
EOF
--enable_reconnect
--source include/wait_until_connected_again.inc
--echo #
--echo # Ensure the plugin is loaded.
--echo #
--replace_regex /\.dll/.so/
SELECT * FROM mysql.plugin WHERE dl like '%libdaemon%' ORDER BY name;
# MTR will remove this file later, but this might be too late.
--error 0,1
--remove_file $expect_file
--write_file $expect_file
wait
EOF
--shutdown_server 10
--source include/wait_until_disconnected.inc
# To test the case where the same plugin is reloaded with a different soname,
# we must copy the example daemon to a new location renaming it.
let $DAEMON_RELOAD = lib$DAEMONEXAMPLE;
--copy_file $PLUGIN_DIR/$DAEMONEXAMPLE $PLUGIN_DIR/$DAEMON_RELOAD
--copy_file include/libdaemon_example.ini $PLUGIN_DIR/libdaemon_example.ini
# Now reload it and see that it is a different name.
--exec $MYSQL_PLUGIN_CMD ENABLE libdaemon_example
#
# Restart the server
#
--append_file $expect_file
restart
EOF
--enable_reconnect
--source include/wait_until_connected_again.inc
--echo #
--echo # Ensure the plugin is replaced.
--echo #
--replace_regex /\.dll/.so/
SELECT * FROM mysql.plugin WHERE dl like '%libdaemon%' ORDER BY name;
--echo #
--echo # Disable the plugin...
--echo #
@ -170,7 +238,12 @@ EOF
#
# Disable the plugin
#
--exec $MYSQL_PLUGIN_CMD DISABLE daemon_example
--exec $MYSQL_PLUGIN_CMD DISABLE libdaemon_example
# Remove files for last test case.
--remove_file $PLUGIN_DIR/$DAEMON_RELOAD
--remove_file $DAEMONEXAMPLE_DIR/libdaemon_example.ini
#
# Restart the server
@ -184,7 +257,7 @@ EOF
--echo #
--echo # Ensure the plugin isn't loaded.
--echo #
SELECT * FROM mysql.plugin WHERE dl like 'libdaemon%' ORDER BY name;
SELECT * FROM mysql.plugin WHERE dl like '%libdaemon%' ORDER BY name;
#
# Stop the server for error conditions