mihaibudiu opened a new pull request, #5118: URL: https://github.com/apache/calcite/pull/5118
## Jira Link [CALCITE-7669](https://issues.apache.org/jira/browse/CALCITE-7669) ## Changes Proposed There are two separate commits, if independent interest. The first commit only strengthens the validator for rejecting UNNEST on the right side of some JOIN operators. The semantics of the UNNEST operator changes depending on conformance: for Presto/Trino UNNEST(a) where a is a ROW ARRAY produces a single column; for other conformances it produces as many columns as there are fields in ROW. This PR makes the choice of semantics explicit at all levels of the representation: the Uncollect operator, and the Enumerable representation by adding a new boolean flag to control the behavior. The flag clearly affects type inference too. This PR is a stand-alone fragment extracted from #5031 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
