[jira] [Created] (CALCITE-4896) GROUP BY might get wrong results under certain circumstances in Elasticsearch Adapter

["ZheHu (Jira)" <ji...@apache.org>]

ZheHu created CALCITE-4896:
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             Summary: GROUP BY might get wrong results under certain circumstances in Elasticsearch Adapter
                 Key: CALCITE-4896
                 URL: https://issues.apache.org/jira/browse/CALCITE-4896
             Project: Calcite
          Issue Type: Bug
          Components: elasticsearch-adapter
    Affects Versions: 1.28.0
            Reporter: ZheHu


In Elasticsearch Adapter, if one field is grouped by along with missing value, SQL user might get incorrect results. Take the following case as an example:
{code:java}
ES mappings: {"int_field1" : integer, "int_field2" : integer}

doc1 = {"int_field1":1, "int_field2": -2147483648}
doc1 = {"int_field1":2}
{code}

When I try "select count(1) as CNT from view group by int_field2", the result is 2.

For Integer type, the missing value is replaced by Integer.MIN_VALUE, so doc1 and doc2 will be divided in the same group.

Any other data types like short、long、float、double, they also have such problem.



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