Add "real ip:<ip_or_localhost>" part to the aborted message
Only for proxy-protocoled connection, so it does not not to cause
confusion to normal users.
The bug was some old code that, without any explanation, reset
PART_KEY_FLAG from fields in temporary tables. This caused
join_tab->key_dependent to not be updated properly, which caused
an assert.
This patch contains a full implementation of the optimization
that allows to use in-memory rowid / primary filters built for range
conditions over indexes. In many cases usage of such filters reduce
the number of disk seeks spent for fetching table rows.
In this implementation the choice of what possible filter to be applied
(if any) is made purely on cost-based considerations.
This implementation re-achitectured the partial implementation of
the feature pushed by Galina Shalygina in the commit
8d5a11122c.
Besides this patch contains a better implementation of the generic
handler function handler::multi_range_read_info_const() that
takes into account gaps between ranges when calculating the cost of
range index scans. It also contains some corrections of the
implementation of the handler function records_in_range() for MyISAM.
This patch supports the feature for InnoDB and MyISAM.
