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  1. Java Driver
  2. JAVA-4258

Aggregation helper fails on simplified string form for $merge stage

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      Originally reported in spring-data-mongodb#3743.

      In AggregateIterableImpl.getOutNamespace method
      BsonDocument mergeDocument = lastStageDocument.getDocument("$merge")
      this line does not consider simple String type when $merge use the simplified form, like {$merge: <collection>}

      The workaround is to use the long form of $merge, as documented here.

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            jeff.yemin@mongodb.com Jeffrey Yemin
            cstrobl Christoph Strobl
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