sunjincheng121 commented on a change in pull request #8311:
[FLINK-10976][table] Add Aggregate operator to Table API
URL: https://github.com/apache/flink/pull/8311#discussion_r281122982
##########
File path:
flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/api/GroupedTable.java
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@@ -55,6 +55,43 @@
*/
Table select(Expression... fields);
+ /**
+ * Performs an aggregate operation with an aggregate function. Use this
before a selection
+ * to perform the selection operation. The output will be flattened if
the output type is a
+ * composite type.
Review comment:
` Use this before a selection to perform the selection operation.` -> `You
have to close the "aggregate" with a select statement` ?
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