[FLINK-16769] Support new type inference for Table#flatMap

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.14.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Release Note: `Table.flatMap()` supports the new type system now. Users are requested to upgrade their functions.
• Assignee: Timo Walther
• Reporter: Dawid Wysakowicz
• Created: 25/Mar/20 11:31
• Updated: 25/Aug/21 09:28
• Resolved: 25/Aug/21 09:28

Description

Currently the Table#flatMap works only for TableFunctionDefinition. We should fix it to work also with functions that use the new type stack.

The problematic spot is in OperationTreeBuilder#flatMap

Issue Links

• links to: GitHub Pull Request #16850