xuyangzhong commented on code in PR #24068:
URL: https://github.com/apache/flink/pull/24068#discussion_r1456817108
##########
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/logical/WindowSpec.java:
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@@ -31,4 +32,15 @@
public interface WindowSpec {
String toSummaryString(String windowing);
+
+ /**
+ * Return if the window is a aligned window.
+ *
+ * <p>See more details about aligned window and unaligned window in {@link
+ *
org.apache.flink.table.runtime.operators.window.windowtvf.common.AbstractWindowOperator}.
+ *
+ * <p>TODO introduce unaligned window like session window.
Review Comment:
Add a jira issue for it.
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