Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/3665#discussion_r109615593
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/validate/FunctionCatalog.scala
---
@@ -350,7 +350,16 @@ class BasicOperatorTable extends
ReflectiveSqlOperatorTable {
SqlStdOperatorTable.EXISTS,
// EXTENSIONS
EventTimeExtractor,
- ProcTimeExtractor
+ ProcTimeExtractor,
+ SqlStdOperatorTable.TUMBLE,
+ SqlStdOperatorTable.TUMBLE_START,
--- End diff --
Do we already support the `START/END` functions? We should let them
unsupported until they are implemented and tested.
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