- Catch all kinds of exceptions when calling Thrift code.

Cassandra SE: small optimization: StringCopyConverter::mariadb_to_cassandra doesn't need to make NULL-terminated strings.

- Make cassandra.test drop and re-crate the test keyspace.

- Make an attempt at fixing.

- add support for Cassandra's UUID datatype. We map it to CHAR(36).

- Add mapping for INT datatype
- Primary key column should now be named like CQL's primary key, 
  or 'rowkey' if CF has key_alias.

- 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.

- Remove HTON_CAN_RECREATE flag, re-create won't delete rows in cassandra.

- 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)

- bulk inserts themselves
- control variable and counters.

- preparations for support of bulk INSERT.

- Fix typo in ha_cassandra::rnd_pos().
- in ::index_read_map(), do not assume that pk column is part of table->read_set.

- Partial support for DELETE ... WHERE.

- Descriptive error messages
- Unpack PK column on range scans

- Support "DELETE FROM cassandra_table"

- Got range reads to work (except for unpacking of the rowkey value)

- Introduce type converters (so far rather trivial)
- switch INSERT to using batch_mutate()

When appliying parent combinations to the overlay,
filter them through the %skip_combinations using the overlayed filename

Post-merge fixes for mismatches that only affect 5.5 (but not 5.3)

Following reasons caused mismatches:
  - different handling of invalid values;
  - different CAST results with fractional seconds;
  - microseconds support in MariaDB;
  - different algorithm of comparing temporal values;
  - differences in error and warning texts and codes;
  - different approach to truncating datetime values to time;
  - additional collations;
  - different record order for queries without ORDER BY;
  - MySQL bug#66034.
More details in MDEV-369 comments.

make CMakeLists.txt to detect if the installed boost can be compiled with the
installed compile and specified set of compiler options.

Background: even sufficiently new Boost cannot be compiled with the sufficiently old gcc
in the presence of -fno-rtti

add missing checks to configure.cmake
remove dead code and unused HAVE_xxx constants from the sources

Don't use ER(xxx) in THD::close_connection(), when current_thd is already reset to NULL.
Prefer ER_THD() or ER_DEFAULT() instead.

      mysql_rm_table_no_locks() function was modified.
      When we construct log record for the DROP TABLE, now we
      look if there's a comment before the first table name and
      add it to the record if so.
  
per-file comments:
  sql/sql_table.cc
  MDEV-340 Save replication comments for DROP TABLE.
        comment_length() function implemented to find comments in the query,
        call it in mysql_rm_table_no_locks() and use the result to form log record.
  mysql-test/suite/binlog/r/binlog_drop_if_exists.result
  MDEV-340 Save replication comments for DROP TABLE.
        test result updated.
  mysql-test/suite/binlog/t/binlog_drop_if_exists.test
  MDEV-340 Save replication comments for DROP TABLE.
        test case added.

Add the check for sys/utsname.h to configure.cmake

use correct macro for Microsoft compiler. It is _MSC_VER , not _MSV_VER

Following reasons caused mismatches:
  - different handling of invalid values;
  - different CAST results with fractional seconds;
  - microseconds support in MariaDB;
  - different algorithm of comparing temporal values;
  - differences in error and warning texts and codes;
  - different approach to truncating datetime values to time;
  - additional collations;
  - different record order for queries without ORDER BY;
  - MySQL bug#66034.
More details in MDEV-369 comments.