hailong wang created FLINK-14408:
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Summary: In OldPlanner, UDF open method can not be invoke when SQL
is optimized
Key: FLINK-14408
URL: https://issues.apache.org/jira/browse/FLINK-14408
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Affects Versions: 1.9.0
Reporter: hailong wang
Fix For: 1.10.0
For now, UDF open method can not be invoked when SQL is optimized. For example,
a SQL as follow:
{code:java}
SELECT MyUdf(1) as constantValue FROM MyTable
{code}
MyUdf.open can not be invoked in OldPlanner.
So, we can construct a constantFunctionContext or a constantRuntimeContext and
invoke it just like BlinkPlanner.
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