Paul Rogers created DRILL-5171:
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Summary: TestSort unit test tests the external sort, not the
in-memory SortBatch
Key: DRILL-5171
URL: https://issues.apache.org/jira/browse/DRILL-5171
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.8.0
Reporter: Paul Rogers
Drill provides two sort operators: an in-memory {{SortBatch}} and a spillable
{{ExternalSortBatch}}. The external sort is adaptive: it sorts in memory when
it can, and spills when necessary. Perhaps for this reason, the in-memory sort
appears to be deprecated (but is not marked as such.)
The in-memory sort has associated test case: {{TestSort}} and
{{TestSimpleSort}}. When run, {{TestSort}} actually uses the external sort.
{{TestSimpleSort}} has a single test case which is disabled.
The result is that no tests exist for the in-memory sort. That operator should
be marked as deprecated, or the test cases adjusted to actually exercise the
in-memory sort operator.
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