GitHub user xccui opened a pull request: https://github.com/apache/flink/pull/4846
[FLINK-7854] [table] Reject lateral table outer joins with predicates in SQL ## What is the purpose of the change Due to CALCITE-2004, this PR aims to temporarily restrict the predicates for left outer join against the lateral table to be literal `TRUE`. ## Brief change log - Override the `validateJoin()` method in `FlinkCalciteSqlValidator` to check the join conditions. - Update the tests. - Refine the documents. ## Verifying this change This change is already covered by existing tests `CorrelateTest`. ## 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) ## Documentation - Does this pull request introduce a new feature? (no) - If yes, how is the feature documented? (docs) You can merge this pull request into a Git repository by running: $ git pull https://github.com/xccui/flink FLINK-7854 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/flink/pull/4846.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #4846 ---- commit d63bfd569921180fae8f3bee6dd564e47e34f7ff Author: Xingcan Cui <xingc...@gmail.com> Date: 2017-10-16T08:49:14Z [FLINK-7854] [table] Reject lateral table outer joins with predicates in SQL ---- ---