Jacques Nadeau created DRILL-196:
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             Summary: Some queries that should work throw strange exceptions. 
                 Key: DRILL-196
                 URL: https://issues.apache.org/jira/browse/DRILL-196
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Jacques Nadeau


Other group by queries work.  However, the one below fails.  Not sure why.  
Error is on client side.  Could be encoding or decoding of record batches.

SELECT _MAP['N_NAME'], count(1) FROM "/tmp/nation.parquet" group by 
_MAP['N_NAME'];



java.lang.IndexOutOfBoundsException: index: 7, length: 2 (expected: range(0, 7))
        at io.netty.buffer.AbstractByteBuf.checkIndex(AbstractByteBuf.java:1130)
        at io.netty.buffer.SlicedByteBuf.getBytes(SlicedByteBuf.java:171)
        at 
org.apache.drill.exec.vector.VarBinaryVector$Accessor.get(VarBinaryVector.java:234)
        at 
org.apache.drill.exec.vector.VarBinaryVector$Accessor.getObject(VarBinaryVector.java:251)
        at 
org.apache.drill.sql.client.full.BatchLoaderMap.getObj(BatchLoaderMap.java:116)
        at 
org.apache.drill.sql.client.full.BatchLoaderMap.getCurrentObject(BatchLoaderMap.java:108)
        at 
org.apache.drill.sql.client.full.ResultEnumerator.moveNext(ResultEnumerator.java:34)
        at 
net.hydromatic.optiq.runtime.ArrayEnumeratorCursor.next(ArrayEnumeratorCursor.java:44)
        at 
net.hydromatic.optiq.jdbc.OptiqResultSet.next(OptiqResultSet.java:161)
        at sqlline.SqlLine$BufferedRows.<init>(SqlLine.java:2499)
        at sqlline.SqlLine.print(SqlLine.java:1886)
        at sqlline.SqlLine$Commands.execute(SqlLine.java:3835)
        at sqlline.SqlLine$Commands.sql(SqlLine.java:3738)
        at sqlline.SqlLine.dispatch(SqlLine.java:882)
        at sqlline.SqlLine.begin(SqlLine.java:717)
        at sqlline.SqlLine.mainWithInputRedirection(SqlLine.java:460)
        at sqlline.SqlLine.main(SqlLine.java:443)

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