Hi everybody, In 0.13/0.12, when you execute query sql "select a from root.sg where b >= 3 " with the following dataset: +-------------------------------------+---------+---------+ | Time|root.sg.a|root.sg.b| +-------------------------------------+---------+---------+ |1970-01-01T08:00:00.001+08:00| 1| null| |1970-01-01T08:00:00.002+08:00| 2| null| |1970-01-01T08:00:00.003+08:00| null| 3| |1970-01-01T08:00:00.004+08:00| null| 4| +-------------------------------------+----------+--------+ The expected result set would be empty because the values of root.sg.a are null at timestamp 3 and 4(b >= 3). +----+----------------+ |Time|root.test.test.a| +----+----------------+ +----+----------------+ Empty set. We suggest keeping the null value of the columns at the timestamp given by filter. You can use "select a from root.sg where b >= 3 and a is not null" if you do not want to keep the null value. +-------------------------------------+---------+ | Time|root.sg.a| +-------------------------------------+---------+ |1970-01-01T08:00:00.003+08:00| null| |1970-01-01T08:00:00.004+08:00| null| +-------------------------------------+---------+ Any comments would be much appreciated.
Best, ------------------------------------ Lanyu Liao School of Software, Tsinghua University 廖兰宇 清华大学 软件学院
