Jesus Camacho Rodriguez created HIVE-13831:
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Summary: Error pushing predicates to HBase storage handler
Key: HIVE-13831
URL: https://issues.apache.org/jira/browse/HIVE-13831
Project: Hive
Issue Type: Bug
Components: HBase Handler
Affects Versions: 2.1.0
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
Discovered while working on HIVE-13693.
There is an error on the predicates that we can push to HBaseStorageHandler. In
particular, range predicates of the shape {{(bounded, open)}} and {{(open,
bounded)}} over long or int columns get pushed and return wrong results.
The problem has to do with the storage order for keys in HBase. Keys are sorted
lexicographically. Since the byte representation of negative values comes after
the positive values, open range predicates need special handling that we do not
have right now.
Thus, for instance, when we push the predicate {{key > 2}}, we return all
records with column _key_ greater than 2, plus the records with negative values
for the column _key_. This problem does not get exposed if a filter is kept in
the Hive operator tree, but we should not assume the latest.
This fix avoids pushing this kind of predicates to the storage handler,
returning them in the _residual_ part of the predicate that cannot be pushed.
In the future, special handling might be added to support this kind of
predicates.
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