twalthr opened a new pull request #7864: [FLINK-11785][table-api] Replace case class Null(type) by nullOf(type) expression URL: https://github.com/apache/flink/pull/7864 ## What is the purpose of the change This introduce `nullOf(type)` for representing typed nulls in Table API. It allows to uncouple API from expression case classes and enables us to have `nullOf(type)` and `null` in the future. Once we introduced a `NULL` type and proper type inference. ## Brief change log - Deprecate old case class - Introduce new `nullOf` implicit and parsing step - Remove old occurrences ## Verifying this change - Covered by existing tests ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): no - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: no - The serializers: no - The runtime per-record code paths (performance sensitive): no - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: no - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? no - If yes, how is the feature documented? docs
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