Package org.apache.flink.table.api

Class Slide

java.lang.Object
org.apache.flink.table.api.Slide
@PublicEvolving public final class Slide extends Object
Helper class for creating a sliding window. Sliding windows have a fixed size and slide by a specified slide interval. If the slide interval is smaller than the window size, sliding windows are overlapping. Thus, an element can be assigned to multiple windows.

For example, a sliding window of size 15 minutes with 5 minutes sliding interval groups elements of 15 minutes and evaluates every five minutes. Each element is contained in three consecutive window evaluations.

Java Example: 


 Slide.over("10.minutes").every("5.minutes").on("rowtime").as("w")

Scala Example: 


 Slide over 10.minutes every 5.minutes on 'rowtime as 'w

  • Constructor Details

    • Slide

      public Slide()

  • Method Details

    • over

      public static SlideWithSize over(org.apache.flink.table.expressions.Expression size)
      Creates a sliding window. Sliding windows have a fixed size and slide by a specified slide interval. If the slide interval is smaller than the window size, sliding windows are overlapping. Thus, an element can be assigned to multiple windows.

      For example, a sliding window of size 15 minutes with 5 minutes sliding interval groups elements of 15 minutes and evaluates every five minutes. Each element is contained in three consecutive

      Parameters:
      size - the size of the window as time or row-count interval
      Returns:
      a partially specified sliding window