danny0405 commented on a change in pull request #11340: [Flink 14338] Upgrade
Calcite version to 1.22 for Flink SQL
URL: https://github.com/apache/flink/pull/11340#discussion_r392007033
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/plan/rules/common/LogicalWindowAggregateRule.scala
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@@ -125,6 +142,105 @@ abstract class LogicalWindowAggregateRule(ruleName:
String)
call.transformTo(result)
}
+ /** Trim out the HepRelVertex wrapper and get current relational expression.
*/
+ private def trimHep(node: RelNode): RelNode = {
+ node match {
+ case hepRelVertex: HepRelVertex =>
+ hepRelVertex.getCurrentRel
+ case _ => node
+ }
+ }
+
+ /**
+ * Rewrite plan with function call as window call operand: rewrite the
window call to
+ * reference the input instead of invoking the function directly, in order
to simplify the
+ * subsequent rewrite logic.
+ *
+ * For example, plan
+ * <pre>
+ * LogicalAggregate(group=[{0}], a=[COUNT()])
+ * LogicalProject($f0=[$TUMBLE(TUMBLE_ROWTIME($0), 4:INTERVAL SECOND)],
a=[$1])
+ * LogicalProject($f0=[1970-01-01 00:00:00:TIMESTAMP(3)], a=[$0])
+ * </pre>
+ *
+ * would be rewritten to
+ * <pre>
+ * LogicalAggregate(group=[{0}], a=[COUNT()])
+ * LogicalProject($f0=[TUMBLE($1, 4:INTERVAL SECOND)], a=[$0])
+ * LogicalProject(a=[$1], zzzzz=[TUMBLE_ROWTIME($0)])
+ * LogicalProject($f0=[1970-01-01 00:00:00:TIMESTAMP(3)], a=[$0])
+ * </pre>
+ */
+ private def rewriteWindowCallWithFuncOperands(
Review comment:
Yes, they have different rewrite patterns.
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