Tickets :: Comment on [#7363] Avoid bitwise operations in the SQL Share driver

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Comment	> > The attached patch optimizes the way we do the problematic slow > query. We have patched our production environment and our problem > seems to be definitively solved. Thanks god! > > We can do it because in our horde installation we don't allow sharing > anything with all the users (authenticated or not) - perm_creator, > perm_default and perm_guest will always be zero in our database > > We are changing the original LEFT JOIN with a UNION > > At the moment we ONLY change the query if the user is not part of any > group and if we don't have $attributes. It could be improved, but > this is enough for us. > > Original query: > SELECT DISTINCT s.* > FROM nag_shares s > LEFT JOIN nag_shares_users AS u ON u.share_id = s.share_id > WHERE s.share_owner = 'username' > OR (s.perm_creator & 2) > OR (s.perm_default & 2) > OR ( u.user_uid = 'username' AND (u.perm & 2)) > ORDER BY s.attribute_name ASC; > > Improved query (written by David Fernandez -sysadmin at the UPV/EHU- > based on the patch sent by John Madden to the kronolith mailing list: > SELECT DISTINCT s.* > FROM nag_shares s > WHERE s.share_owner = 'username' > UNION > SELECT s2.* > FROM nag_shares s2 RIGHT JOIN nag_shares_users u ON s2.share_id = u.share_id > WHERE ( u.user_uid = 'username' AND (u.perm & 2)) > > Comments are welcomed !
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