godfreyhe commented on a change in pull request #8288: [FLINK-12345]
[table-planner-blink] Add support for generating optimized logical plan for
stream window aggregate
URL: https://github.com/apache/flink/pull/8288#discussion_r281495472
##########
File path:
flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/functions/sql/ProctimeSqlFunction.java
##########
@@ -37,16 +39,24 @@ public ProctimeSqlFunction() {
super(
"PROCTIME",
SqlKind.OTHER_FUNCTION,
- ReturnTypes.explicit(new ProctimeRelProtoDataType()),
- null,
- OperandTypes.NILADIC,
- SqlFunctionCategory.TIMEDATE);
+
ReturnTypes.cascade(ReturnTypes.explicit(SqlTypeName.TIMESTAMP),
SqlTypeTransforms.TO_NULLABLE),
Review comment:
I didn't notice `ProctimeMaterializeSqlFunction`'s existence before, i will
revert the changes in `ProctimeSqlFunction`
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