HBaseRecordReader next logic: curRes finished and scanner finished
process all events
test
merge i16
save
fix bug with PhysicalcollapsingAggregate
generate data 10W 100W 10000W to test
aggregate
add join & segment physical operator
Merge branch 'i20' of github.com:XingCloud/incubator-drill into i20
test generate data
change hbaserecordreader for ts(timestamp)
合并了i20分支