Andrei Sereda created CALCITE-2553:
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Summary: Support NullDirection in Sorting for ElasticSearch Adapter
Key: CALCITE-2553
URL: https://issues.apache.org/jira/browse/CALCITE-2553
Project: Calcite
Issue Type: Bug
Components: elasticsearch-adapter
Reporter: Andrei Sereda
Assignee: Julian Hyde
Allow {{NULLS FIRST / LAST}} in {{ORDER BY}} clauses in ES adapter. Currently
they're ignored.
This can be possibly achieved with [Bucket aggregation
sorting|https://www.elastic.co/guide/en/elasticsearch/reference/6.1/search-aggregations-pipeline-bucket-sort-aggregation.html]
(for aggregations) and/or [Script Based
Sorting|https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-sort.html#_script_based_sorting]
(for regular queries).
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