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  1. Kafka
  2. KAFKA-14748

Relax non-null FK left-join requirement

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 3.7.0
    • streams

    Description

      Kafka Streams enforces a strict non-null-key policy in the DSL across all key-dependent operations (like aggregations and joins).

      This also applies to FK-joins, in particular to the ForeignKeyExtractor. If it returns `null`, it's treated as invalid. For left-joins, it might make sense to still accept a `null`, and add the left-hand record with an empty right-hand-side to the result.

      KIP-962: https://cwiki.apache.org/confluence/display/KAFKA/KIP-962%3A+Relax+non-null+key+requirement+in+Kafka+Streams 

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          relates to

          Improvement - An improvement or enhancement to an existing feature or task. KAFKA-12317 Relax non-null key requirement for left/outer KStream joins

          • Major - Major loss of function.
          • Resolved

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            People

              aki Florin Akermann
              mjsax Matthias J. Sax
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              Dates

                Created:
                Updated:
                Resolved: