[FLINK-17373] Support the NULL type for function calls

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.11.0
• Component/s: Table SQL / API, Table SQL / Planner
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Timo Walther
• Created: 24/Apr/20 13:00
• Updated: 30/Apr/20 13:46
• Resolved: 30/Apr/20 13:46

Description

According to FLIP-37, the null type is used to represent untyped NULL literals. Those are in particular useful when it comes to passing them to a function call. The new type inference of FLIP-65 is able to process call such as `f(NULL)`.

Issue Links

• links to: GitHub Pull Request #11904