HeartSaVioR commented on a change in pull request #35526:
URL: https://github.com/apache/spark/pull/35526#discussion_r808608809
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameTimeWindowingSuite.scala
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@@ -490,4 +490,81 @@ class DataFrameTimeWindowingSuite extends QueryTest with
SharedSparkSession {
assert(attributeReference.dataType == tuple._2)
}
}
+
+ test("No need to filter data when the sliding window length is not
redundant") {
+ // check the value column
+ val df1 = Seq(
+ ("2022-02-15 19:39:34", 1, "a"),
+ ("2022-02-15 19:39:56", 2, "a"),
+ ("2022-02-15 19:39:27", 4, "b")).toDF("time", "value", "id")
+ .select(window($"time", "9 seconds", "3 seconds", "0 second"), $"value")
+ .orderBy($"window.start".asc, $"value".desc).select("value")
+ val df2 = Seq(
+ (LocalDateTime.parse("2022-02-15T19:39:34"), 1, "a"),
+ (LocalDateTime.parse("2022-02-15T19:39:56"), 2, "a"),
+ (LocalDateTime.parse("2022-02-15T19:39:27"), 4, "b")).toDF("time",
"value", "id")
+ .select(window($"time", "9 seconds", "3 seconds", "0 second"), $"value")
+ .orderBy($"window.start".asc, $"value".desc).select("value")
+
+ val df3 = Seq(
+ ("2022-02-15 19:39:34", 1, "a"),
+ ("2022-02-15 19:39:56", 2, "a"),
+ ("2022-02-15 19:39:27", 4, "b")).toDF("time", "value", "id")
+ .select(window($"time", "9 seconds", "3 seconds", "-2 second"), $"value")
+ .orderBy($"window.start".asc, $"value".desc).select("value")
+ val df4 = Seq(
+ (LocalDateTime.parse("2022-02-15T19:39:34"), 1, "a"),
+ (LocalDateTime.parse("2022-02-15T19:39:56"), 2, "a"),
+ (LocalDateTime.parse("2022-02-15T19:39:27"), 4, "b")).toDF("time",
"value", "id")
+ .select(window($"time", "9 seconds", "3 seconds", "2 second"), $"value")
+ .orderBy($"window.start".asc, $"value".desc).select("value")
+
+ Seq(df1, df2).foreach { df =>
+ val filter = df.queryExecution.optimizedPlan.find(_.isInstanceOf[Filter])
+ val exist = filter.get.constraints.iterator.toStream.filter(e =>
+ e.toString.contains(">=") || e.toString.contains("<"))
+ assert(exist.isEmpty, "No need to filter data between " +
+ "window.start and window.end when the sliding window length is not
redundant")
Review comment:
`No need to filter windows when windowDuration is multiple of
slideDuration` looks OK to me. tumbling window means windowDuration =
slideDuration so we don't need to explicitly say `sliding windows`. Please
change the title of PR as well. Thanks!
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