[FLINK-15149] Merge InputTypeStrategy and InputTypeValidator

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.10.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Timo Walther
• Created: 09/Dec/19 09:29
• Updated: 19/Dec/19 16:48
• Resolved: 19/Dec/19 16:48

Description

Due to the design of Calcite, even operand checkers that were originally used for "checking" can infer and modify call arguments nowadays. This conflicts with our original design of separating validation and input type inference. Therefore, we propose to merge those two concepts in Flink into one `InputTypeStrategy` that is responsible for both inferring/enriching and validation.

Issue Links

• links to: GitHub Pull Request #10546