Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/4199#discussion_r124988636
--- Diff:
flink-libraries/flink-table/src/main/java/org/apache/calcite/sql/fun/SqlStdOperatorTable.java
---
@@ -1900,7 +1900,7 @@ public void unparse(
new SqlGroupFunction(SqlKind.TUMBLE, null,
OperandTypes.or(OperandTypes.DATETIME_INTERVAL,
OperandTypes.DATETIME_INTERVAL_TIME)) {
- @Override List<SqlGroupFunction>
getAuxiliaryFunctions() {
+ @Override public List<SqlGroupFunction>
getAuxiliaryFunctions() {
--- End diff --
As I mentioned in the PR description: "We need to get the visibility
changes that I made in Calcite in the next Calcite release." Right now it is
not possible to add custom SqlGroupFunctions.
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