sunjincheng121 commented on a change in pull request #8087:
[FLINK-12029][table] Add column operations for TableApi
URL: https://github.com/apache/flink/pull/8087#discussion_r271550350
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/api/tableImpl.scala
##########
@@ -568,16 +589,37 @@ class WindowGroupedTableImpl(
override def select(fields: Expression*): Table = {
selectInternal(
groupKeys,
- window,
+ expandColumnsInGroupWindow(window),
fields)
}
+ private def expandColumnsInGroupWindow(window: GroupWindow): GroupWindow = {
+
+ val resolvedTimeField = tableImpl.resolveCalls(Seq(window.getTimeField))
+ assert(resolvedTimeField.size() == 1, "TimeField of window only support
one column.")
Review comment:
`TimeField of window only support one column.` -> `Group Window only
supports a single time field column.`?
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