[FLINK-14022] Add validation check for places where Python ScalarFunction cannot be used

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Resolved
• Fix Version/s: 1.10.0
• Component/s: API / Python
• Labels: pull-request-available
• Assignee: Huang Xingbo
• Reporter: Dian Fu
• Created: 09/Sep/19 13:36
• Updated: 01/Nov/19 15:31
• Resolved: 01/Nov/19 15:31

Description

Currently, there are places where Python ScalarFunction could not be used, for example:

1. Python UDF could not be used in MatchRecognize
2. Python UDFs could not be used in Join condition which take the columns from both the left table and the right table as inputs

We should add validation check for places where it’s not supported.

Issue Links

• links to: GitHub Pull Request #9969