Fixes:
* Irrelevant where conditions
* Irrelevant const
* A potential infinite loop in treenode
* Bad implicit case fallthroughs
* Explicit markings for required case fallthroughs
* Unused variables
* Unused function
Also disabled some warnings for now which we should fix later.
Rename packages to MariaDB-columnstore-engine, MariaDB-columnstore-libs
and MariaDB-columnstore-platform.
Also add the "columnstore-" prefix the the components so that MariaDB's
packaging system understands then and add a line to include them in
MariaDB's packaging.
In addition
* Fix S3 building for dist source build
* Fix Debian 10 dependency issue
* Fix git handling for dist builds
* Add support for MariaDB's RPM building
* Use MariaDB's PCRE and readline
* Removes a few dead files
* Fix Boost noncopyable includes
Raised the default for orderby threads from 4 to 16.
Removed if LIMIT check block in makeVtableModeSteps().
Removed a duplicate of TimeCompare class and methods.
MCOL-3536 Upmerged the change.
MCOL-894 Post review changes.
Uncomment if LIMIT check block in makeVtableModeSteps().
TupleAnnexStep dtor now uses vector::size() as a boundary.
Removed useless try-catch blocks.
executeParallelOrderBy() now calculates rowSize only once.
Removed forward declaration in the unexisting namespace.
Trim UTs a bit.
MCOL-894 Add default values in Compare and CSEP ctors to activate UTF-8 sorting
properly.
MCOL-894 Unit tests to build a framework for a new parallel sorting.
MCOL-894 Finished with parallel workers invocation.
The implementation lacks final aggregation step.
MCOL-894 TupleAnnexStep's init and destructor are now parallel execution aware.
Implemented final merging step for parallel execution finalizeParallelOrderBy().
Templated unit test to use it with arbitrary number of rows, threads.
Reuse LimitedOrderBy in the final step
MCOL-894 Cleaned up finalizeParallelOrderBy.
MCOL-894 Add and propagate thread variable that controls a number of threads.
Optimized comparators used for sorting and add corresponding UTs.
Refactored TupleAnnexStep::finalizeParallelOrderByDistinct.
Parallel sorting methods now preallocates memory in batches.
MCOL-894 Fixed comparator for StringCompare.
b/c an incorrect number of key columns was used whilst
initializing Eq() struct. The regression caused by
changes made for MCOL-1829 so I revised the changes
made. Now LimitedOrderBy::getKeyLength() returns an
actual key columns count.
