[FLINK-14342] Remove method FunctionDefinition#getLanguage

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Resolved
• Affects Version/s: 1.10.0
• Fix Version/s: 1.10.0
• Component/s: API / Python, Table SQL / API
• Labels: pull-request-available
• Assignee: Wei Zhong
• Reporter: Dian Fu
• Created: 08/Oct/19 05:58
• Updated: 25/Oct/19 11:03
• Resolved: 25/Oct/19 11:03

Description

As discussed in https://github.com/apache/flink/pull/9748#discussion_r329575228, all the Python ScalarFunction need to implement the interface PythonFunction and we can determine if a ScalarFunction is Python or not via if it's an instance of PythonFunction, the method FunctionDefinition#getLanguage is not needed any more.

Issue Links

• links to: GitHub Pull Request #9894