TAJO-353: Add Database support to Tajo. (hyunsik)
TAJO-644: Support quoted identifiers. (hyunsik)
TAJO-682: RangePartitionAlgorithm should be improved to handle empty texts. (Alvin Henrick via hyunsik)
TAJO-685: Add prerequisite to the document of network functions and operators. (jihoon)
TAJO-705: CTAS always stores tables with CSV storage type into catalog. (jinho)
TAJO-708: Test failure after a successful test. (jihoon)
TAJO-701: Invalid bytes when creating BlobDatum with offset. (jinho)
TAJO-684: Add functions about time. (Alvin Henrick via jihoon)
TAJO-712: Fix some bugs after database is supported. (hyunsik)
TAJO-692: Missing Null handling for INET4 in RowStoreUtil. (jihoon)
TAJO-698: Error occurs when FUNCTION and IN statement are used together.
TAJO-716: Using column names actually aliased in aggregation functions can cause planning error.
TAJO-679: TimestampDatum, TimeDatum, DateDatum should be able to be compared with NullDatum. (Alvin Henrick via jihoon)
TAJO-30: Parquet Integration. (David Chen via hyunsik)
TAJO-694: Bump up hadoop to 2.3.0. (jinho)
TAJO-377: Implement concat function (Seungun Choe via jaehwa)
TAJO-378: Implement concat_ws function. (Seungun Choe via jaehwa)
TAJO-718: A group-by clause with the same columns but aliased causes planning error. (hyunsik)
TAJO-718: A group-by clause with the same columns but aliased causes planning error. (Add missed test query files)
TAJO-691: HashJoin or HashAggregation is too slow if there is many unique keys. (hyoungjunkim via hyunsik)