[jira] [Created] (HIVE-4057) LazyHBaseRow may return cache data if the field is null and make the result wrong

["binlijin (JIRA)" <ji...@apache.org>]

binlijin created HIVE-4057:
------------------------------

             Summary: LazyHBaseRow may return cache data if the field is null and make the result wrong
                 Key: HIVE-4057
                 URL: https://issues.apache.org/jira/browse/HIVE-4057
             Project: Hive
          Issue Type: Bug
          Components: HBase Handler
    Affects Versions: 0.11.0
            Reporter: binlijin


LazyHBaseRow
{code}
private Object uncheckedGetField(int fieldID) {
   if(!fieldsInited[fieldID]) {
      fieldsInited[fieldID] = true;
          byte [] res = result.getValue(colMap.familyNameBytes, colMap.qualifierNameBytes);

          if (res == null) {
            return null;
          }
    }
    return fields[fieldID].getObject();
}
{code}
if there is a LazyHBaseRow instance row,  the fieldID is 0, we assume this field is null, so the first time row.uncheckedGetField(0) will return null, but the second time when row.uncheckedGetField(0) will return fields[fieldID].getObject(), this is the last cache data.

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