[FLINK-14983] Add interfaces for input type inference

• 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: 28/Nov/19 08:02
• Updated: 06/Dec/19 14:01
• Resolved: 06/Dec/19 14:01

Description

The design document around TypeInference already mentioned an InputTypesInference that enables the derivation of missing or incomplete input signatures. The Calcite equivalent is called SqlOperandTypeInference.

For FLIP-65, we will need to implement those interfaces as the planner needs infer the DataType s out of logical types that come from the logical query. This is also beneficial to support the NULL literal in the future.

Issue Links

• links to: GitHub Pull Request #10368