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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:
unknown
2012-01-24 11:08:57 -05:00
parent 7615cb0890
commit 461e039a07
4 changed files with 104 additions and 6 deletions
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14
mysql-test/r/mysql_plugin.result
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@ -23,12 +23,24 @@ wacky libdaemon_example.so
wicky libdaemon_example.so
wonky libdaemon_example.so
#
# Ensure the plugin is loaded.
#
SELECT * FROM mysql.plugin WHERE dl like '%libdaemon%' ORDER BY name;
name dl
daemon_example libdaemon_example.so
#
# Ensure the plugin is replaced.
#
SELECT * FROM mysql.plugin WHERE dl like '%libdaemon%' ORDER BY name;
name dl
daemon_example liblibdaemon_example.so
#
# Disable the plugin...
#
#
# Ensure the plugin isn't loaded.
#
SELECT * FROM mysql.plugin WHERE dl like 'libdaemon%' ORDER BY name;
SELECT * FROM mysql.plugin WHERE dl like '%libdaemon%' ORDER BY name;
name dl
#
# Attempt to load non-existant plugin