[FLINK-14408] In OldPlanner, UDF open method can not be invoke when SQL is optimized

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.9.0
• Fix Version/s: 1.9.2, 1.10.0
• Component/s: Table SQL / Legacy Planner
• Labels: pull-request-available
• Assignee: hailong wang
• Reporter: hailong wang
• Created: 16/Oct/19 09:35
• Updated: 25/Oct/19 08:39
• Resolved: 25/Oct/19 04:13

Description

For now, UDF open method can not be invoked when SQL is optimized. For example, a SQL as follow:

SELECT MyUdf(1) as constantValue FROM MyTable

MyUdf.open can not be invoked in OldPlanner.

So, we can construct a constantFunctionContext or a constantRuntimeContext and invoke it just like BlinkPlanner.

Issue Links

• links to: GitHub Pull Request #9916
• links to: https://github.com/apache/flink/pull/9916