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Matthias J. Sax commented on KAFKA-7269: ---------------------------------------- I am not sure about "union" – union is a set operation, thus, it actually does not make sense mathematically, because "union" removes duplicates. (Even if most system don't enforce this mathematical property by default but required to specify a "distinct" keyword for this.) > KStream.merge is not documented > ------------------------------- > > Key: KAFKA-7269 > URL: https://issues.apache.org/jira/browse/KAFKA-7269 > Project: Kafka > Issue Type: Improvement > Components: documentation, streams > Affects Versions: 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, 2.0.0 > Reporter: John Roesler > Priority: Major > Labels: beginner, newbie > > If I understand the operator correctly, it should be documented as a > stateless transformation at > https://kafka.apache.org/20/documentation/streams/developer-guide/dsl-api.html#stateless-transformations -- This message was sent by Atlassian JIRA (v7.6.3#76005)