Lukas Matt a3ac1e3072 account_deletions get stuck while selecting participations ... Following query takes over 20 minutes and fills up the database: SELECT * FROM participations WHERE author_id = XXXXX On servers with a huge participations-table this is a serious performance issue which is easily fixed by the author_id index Signed-off-by: Lukas Matt <lukas@zauberstuhl.de>		2016-03-30 16:20:55 +02:00
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