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Posted to commits@calcite.apache.org by GitBox <gi...@apache.org> on 2019/11/28 11:14:43 UTC

[GitHub] [calcite] rubenada opened a new pull request #1613: [CALCITE-3542] Implement RepeatUnion All=false

rubenada opened a new pull request #1613: [CALCITE-3542] Implement RepeatUnion All=false
URL: https://github.com/apache/calcite/pull/1613
 
 
   Jira ticket: [CALCITE-3542](https://issues.apache.org/jira/browse/CALCITE-3542)  
   
   Previously, [CALCITE-2812](https://issues.apache.org/jira/browse/CALCITE-2812) introduced recursive queries in Calcite via the new operator RepeatUnion.
   However, this initial implementation was not complete, since it only provided RepeatUnion ALL (i.e. duplicates were returned).
   The current PR aims to implement the missing feature: RepeatUnion non-ALL (i.e. duplicates must be discarded).

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