dianfu 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_r240943779
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/table.scala
##########
@@ -367,6 +367,39 @@ class Table(
groupBy(fieldsExpr: _*)
}
+ /**
+ * Perform a global flatAggregate without groupBy. FlatAggregate takes a
TableAggregateFunction
+ * which returns multiple rows. Use a selection after the flatAggregate.
+ *
+ * Example:
+ *
+ * {{{
+ * val tableAggFunc: TableAggregateFunction = new MyTableAggregateFunction
+ * tab.flatAggregate(tableAggFunc('a, 'b)).select('_1, '_2, '_3)
+ * }}}
+ */
+ def flatAggregate(tableAggCall: TableAggFunctionCall): FlatAggTable = {
+ new FlatAggTable(this, tableAggCall)
+ }
+
+ /**
+ * Perform a global flatAggregate without groupBy. FlatAggregate takes a
TableAggregateFunction
+ * which returns multiple rows. Use a selection after the flatAggregate.
+ *
+ * Example:
+ *
+ * {{{
+ * val tableAggFunc: TableAggregateFunction = new MyTableAggregateFunction
+ * tableEnv.registerFunction("myTableAggFunc", tableAggFunc);
+ * tab.flatAggregate("myTableAggFunc(a, b)").select("_1, _2, _3")
+ * }}}
+ */
+ def flatAggregate(tableAggCall: String): FlatAggTable = {
+ this.groupBy().flatAggregate(tableAggCall)
Review comment:
remove this line?
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