yuemeng created CALCITE-1833:
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Summary: SqlAggFunction need new constructor to set paramTypes not
be null for support multiple parameters for udaf
Key: CALCITE-1833
URL: https://issues.apache.org/jira/browse/CALCITE-1833
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.12.0
Reporter: yuemeng
Assignee: Julian Hyde
Priority: Blocker
If we implement a function which is instance of AggregateFunction,that function
will be transform to SqlUserDefinedAggFunction in CalciteCatalogReader.
all parametesTypes information contain by that funcion ,But that function only
as an instance in SqlUserDefinedAggFunction .when construct the
SqlUserDefinedAggFunction instance will set paramTypes to null for super class
sqlFunction indirectly.
The problem is:
we will get SqlUserDefinedAggFunction paramTypes to sql validatefilte,but it
will be filter nothing
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