timestampdiff function fails when using SQL_TSI_FRAC_SECOND for datepart 
parameter, except for very small intervals
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                 Key: DERBY-2386
                 URL: https://issues.apache.org/jira/browse/DERBY-2386
             Project: Derby
          Issue Type: Bug
          Components: SQL
    Affects Versions: 10.2.2.0
         Environment: SUSE Linux Enterprise Desktop 10
            Reporter: Don Smith


Using the timestampdiff function produces and integer overflow except for very 
small intervals. Error message is:

[Error Code: -1, SQL State: 22003]  The resulting value is outside the range 
for the data type INTEGER.

I inserted the following row into my test table:

insert into datetest (ID, 
startdate, 
enddate) values (
5, 
'2006-11-20 04:20:00.0', 
'2006-11-20 04:20:00.2');

This test row works:

select {fn timestampdiff(SQL_TSI_FRAC_SECOND, startdate, enddate)} as diff from 
datetest where id = 5

DIFF
200000000

The value also looks too large, which could be exacerbating the problem.

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