shuwenwei opened a new pull request, #16318:
URL: https://github.com/apache/iotdb/pull/16318

   ## Description
   Fix some bugs in AlignedTVListIterator. In the tree model, some all-null 
rows may be found unexpectedly.
   ```
   IoTDB> insert into root.test.d1(time,s1,s2) aligned values (1,1,1)
   Msg: The statement is executed successfully.
   IoTDB> insert into root.test.d1(time,s1) aligned values (2,2)
   Msg: The statement is executed successfully.
   IoTDB> insert into root.test.d1(time,s2) aligned values (3,3)
   Msg: The statement is executed successfully.
   IoTDB> flush
   Msg: The statement is executed successfully.
   IoTDB> insert into root.test.d1(time,s1,s2) aligned values (1,1,1)
   Msg: The statement is executed successfully.
   IoTDB> insert into root.test.d1(time,s1) aligned values (2,2)
   Msg: The statement is executed successfully.
   IoTDB> insert into root.test.d1(time,s2) aligned values (3,3)
   Msg: The statement is executed successfully.
   IoTDB> select s1 from root.test.d1
   +-----------------------------+---------------+
   |                         Time|root.test.d1.s1|
   +-----------------------------+---------------+
   |1970-01-01T08:00:00.001+08:00|            1.0|
   |1970-01-01T08:00:00.002+08:00|            2.0|
   |1970-01-01T08:00:00.003+08:00|           null|
   +-----------------------------+---------------+
   Total line number = 3
   It costs 0.225s
   ```


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