Github user docete commented on a diff in the pull request:
https://github.com/apache/flink/pull/3579#discussion_r107081399
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/AggregateUtil.scala
---
@@ -916,6 +916,10 @@ object AggregateUtil {
new DecimalMinAggFunction
case BOOLEAN =>
new BooleanMinAggFunction
+ case VARCHAR =>
+ new StringMinAggFunction
+ case CHAR =>
--- End diff --
for 1 and 2, i will add max/minWithRetractAggFunction, ut, and integration
test.
for 3, we do support CHAR type in SQL, not in table api.
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