[TAJO-978] RoundFloat8 should return Float8Datum type.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.9.0
• Assignee: Hyoungjun Kim
• Reporter: Hyoungjun Kim
• Created: 25/Jul/14 07:52
• Updated: 01/Aug/14 09:05
• Resolved: 01/Aug/14 06:12

Description

Currently RoundFloat8 function returns TextDatum. So the following query occurs InvalidOperationException.

 select * from (
    select n_nationkey as key, 
              case when n_nationkey < 6 
                  then round((n_nationkey * 100 / 2.123)::float4 / (n_regionkey + 1)::float4, 2) 
                  else 100.0 
              end as val 
      from nation) a 
order by a.key

2014-07-25 16:40:08,418 ERROR: org.apache.tajo.worker.Task (run(432)) - Cannot compare to FLOAT8 type datum
org.apache.tajo.exception.InvalidOperationException: Cannot compare to FLOAT8 type datum
	at org.apache.tajo.datum.TextDatum.compareTo(TextDatum.java:113)
	at org.apache.tajo.storage.TableStatistics.analyzeField(TableStatistics.java:91)
	at org.apache.tajo.storage.RawFile$RawFileAppender.addTuple(RawFile.java:600)
	at org.apache.tajo.engine.planner.physical.RangeShuffleFileWriteExec.next(RangeShuffleFileWriteExec.java:101)
	at org.apache.tajo.worker.Task.run(Task.java:425)
	at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:406)
	at java.lang.Thread.run(Thread.java:744)