dawidwys opened a new pull request #8062: Rework logical nodes URL: https://github.com/apache/flink/pull/8062 ## What is the purpose of the change * This PR ports expressions resolution to java and new Expression structure. It still uses bridging to old expressions to resolve types of expressions. ## Brief change log Commits: 5a14670 - 18457e8 are part of #8018 - 8dda962 - renames `UnresolvedFieldReferenceExpression` to `UnresolvedReferenceExpression` as it may actually reference either field, table or local reference. - fb9ff6b - I replaced `Table` in `TableReferenceExpression` to better separate user facing `Table` interface from internal logical representation - 28d2791 - this commit introduces `ExpressionResolver` which is a very simple rule engine that applies resolution rules on top of expressions. Each rule has access to field references from inputs of logical operation currently being processed. ## Verifying this change This change is already covered by existing tests in table modules ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (yes / **no**) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**) - The serializers: (yes / **no** / don't know) - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know) - The S3 file system connector: (yes / **no** / don't know) ## Documentation - Does this pull request introduce a new feature? (yes / **no**) - If yes, how is the feature documented? (not applicable / docs / **JavaDocs** / not documented)
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