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Posted to issues@flink.apache.org by "tchivs (via GitHub)" <gi...@apache.org> on 2026/10/16 06:06:00 UTC

[PR] [FLINK-41011][pipeline-connector/doris] Keep NOT NULL constraint when creating Doris tables [flink-cdc]

tchivs opened a new pull request, #4582:
URL: https://github.com/apache/flink-cdc/pull/4582

   ## What is the purpose of the change
   Auto-created Doris tables lose the source columns' NOT NULL constraint.
   
   ## Brief change log
   - DorisMetadataApplier appends NOT NULL for non-nullable column types.
   - buildFields is made package-private (@VisibleForTesting) so the DDL can be checked without a Doris connection.
   
   ## Verifying this change
   New DorisMetadataApplierTest builds the fields of a schema and asserts the generated DDL keeps `id` BIGINT NOT NULL / `name` STRING NOT NULL and leaves `payload` STRING nullable; it fails on master.
   


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