Hans Zeller created TRAFODION-2467:
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Summary: HBase region start key straddling a datetime key value
gives error or crashes
Key: TRAFODION-2467
URL: https://issues.apache.org/jira/browse/TRAFODION-2467
Project: Apache Trafodion
Issue Type: Bug
Components: sql-cmp
Affects Versions: 2.0-incubating
Environment: Any
Reporter: Hans Zeller
Assignee: Hans Zeller
There is no simple test case for this, but Wei-Shiun has observed a problem
that fits the theory, and I was able to force a problem in a debugger.
The issue is this: HBase creates region start keys, and the length of those
keys may provide only a part (a prefix) of a column value. So, HBase may have a
2 byte region start key of \x07\xCE for a table with a DATE key. This provides
the year, 1998 in this case, but not month or day. Normally, we extend this
partial key with zeroes for most data types, including date/time/timestamp.
However, for these datetime types we need to add logic that set the year, month
and day fields to 1 if extending the key with zeroes would make it 0 otherwise.
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