- Don't connect right away in ha_cassandra::open. If we do this, it becomes
impossible to do SHOW CREATE TABLE when the server is not present.
- Note: CREATE TABLE still requires that connection is present, as it needs
to check whether the specified DDL can be used with Cassandra. We could
delay that check also, but then one would not be able to find out about
errors in table DDL until they do a SELECT.
- Add capability to retry calls that have failed with UnavailableException or
[Cassandra's] TimedOutException.
- We don't retry for Thrift errors yet, although could easily do, now.
- added option thrift_port which allows to specify which port to connect to
- not adding username/password - it turns out, there are no authentication
schemes in stock cassandra distribution.
- Full table scan internally uses LIMIT n, and re-starts the scan from
the last seen rowkey value. rowkey ranges are inclusive, so we will
see the same rowkey again. We should ignore it.
- We use HA_MRR_NO_ASSOC ("optimizer_switch=join_cache_hashed") mode
- Not able to use BKA's buffers yet.
- There is a variable to control batch size
- There are status counters.
- Nedeed to make some fixes in BKA code (to be checked with Igor)
