Fix compile warning
Merge pull request #9 from jonahcohen/webscalesql-5.6.19

Fix blob null handling during record retrieval
fix compile error for uint64_t
Merge pull request #10 from mdcallag/webscalesql-5.6.19

fix compile error for uint64_t
Update test results:
- CHECK TABLE is now supported for RocksDB-SE tables
- rocksdb_compaction_style global variable was added
call SetBackgroundThreads to set size of threadpool for compactions and flushes
Merge pull request #12 from mdcallag/webscalesql-5.6.19

call SetBackgroundThreads to set size of threadpool for compactions and ...
Add rocksdb_db_options and rocksdb_default_cf_options sysvars.
(And remove rocksdb_compaction_style since it's redundant.)