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https://issues.apache.org/jira/browse/CASSANDRA-13411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15983140#comment-15983140
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Yogesh Nachnani commented on CASSANDRA-13411:
---------------------------------------------
There is actually a test covering this exact use case - testFunctions() in
AggregationTest
and an explicit comments at multiple places - Selection.java & GroupMaker.java
that say atleast one row must be returned.
Explicit comments tend to point to it being a feature rather than a bug :)
[~blerer] to add clarity
> CQL query using the MAX function returns resultset with Row(null, null ...)
> if data is not found
> ------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-13411
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13411
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Environment: 3.10
> Reporter: Andrew Efimov
> Priority: Minor
>
> CQL query using the MAX function returns resultset with rows.size=1 if data
> is not found. And Row has only null values.
> {{SELECT id, value, MAX(date) FROM table WHERE id = "13411"}}
> If table does not have row by {{id = "13411"}} then session returns ResultSet
> with Rows.size = 1 and Row(null, null, null).
> This is a problem to determine whether or not a data has actually been exist.
> I did not check other aggregation functions.
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