Vladislav Pyatkov created IGNITE-29012:
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Summary: Support recursive CTE with UNION DISTINCT
Key: IGNITE-29012
URL: https://issues.apache.org/jira/browse/IGNITE-29012
Project: Ignite
Issue Type: Improvement
Reporter: Vladislav Pyatkov
h3.Motivation
Recursive CTE currently supports only UNION ALL. UNION DISTINCT is required to
remove previously produced rows during every iteration and to terminate cyclic
recursive queries.
h3.Definition of done
- UNION DISTINCT recursive CTE is supported.
- Duplicates are removed within and across iterations.
- Seen-set memory is included in query memory tracking.
- Cyclic, duplicate, and memory-quota tests are added.
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