sunjincheng121 commented on a change in pull request #7209:
[FLINK-10977][table] Add UnBounded FlatAggregate operator to streaming Table API
URL: https://github.com/apache/flink/pull/7209#discussion_r244908219
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/table.scala
##########
@@ -1028,6 +1060,128 @@ class Table(
}
}
+class FlatAggTable(
+ private[flink] val table: Table,
+ private[flink] val tableAggCall: TableAggFunctionCall) {
+
+ /**
+ * Performs a selection operation on a FlatAggTable table. Similar to an
SQL SELECT statement.
+ * The field expressions can contain complex expressions.
+ *
+ * __Note__: You have to close the flatAggregate with a select statement.
And the select
+ * statement does not support aggregate functions.
+ *
+ * Example:
+ *
+ * {{{
+ * val tableAggFunc: TableAggregateFunction = new MyTableAggregateFunction
Review comment:
Remove `TableAggregateFunction` , IDE will report the compiler error if we
do not add the type info.
and for a simple way I also agree remove this line , and only using the
follows code:
```
tab.flatAggregate(tableAggregateFunc('a, 'b)).select(udf('_1), '_2, '_3)
```
Which user know that not the complete example.
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