Sergey Vojtovich b89feb5b28 BUG#39053 - UNISTALL PLUGIN does not allow the storage engine ... to cleanup open connections It was possible to UNINSTALL storage engine plugin when binding between THD object and storage engine is still active (e.g. in the middle of transaction). To avoid unclean deactivation (uninstall) of storage engine plugin in the middle of transaction, additional storage engine plugin lock is acquired by thd_set_ha_data(). If ha_data is not null and storage engine plugin was not locked by thd_set_ha_data() in this connection before, storage engine plugin gets locked. If ha_data is null and storage engine plugin was locked by thd_set_ha_data() in this connection before, storage engine plugin lock gets released. If handlerton::close_connection() didn't reset ha_data, server does it immediately after calling handlerton::close_connection(). Note that this is just a framework fix, storage engines must switch to thd_set_ha_data() from thd_ha_data() if they want to see fit.		2010-04-14 13:53:59 +04:00
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plugin.h	BUG#39053 - UNISTALL PLUGIN does not allow the storage engine	2010-04-14 13:53:59 +04:00
plugin.h.pp	BUG#39053 - UNISTALL PLUGIN does not allow the storage engine	2010-04-14 13:53:59 +04:00