Package org.apache.flink.table.api

Interface OverWindowedTable

@PublicEvolving public interface OverWindowedTable
A table that has been windowed for OverWindows.

Unlike group windows, which are specified in the GROUP BY clause, over windows do not collapse rows. Instead over window aggregates compute an aggregate for each input row over a range of its neighboring rows.

  • Method Summary

    Modifier and Type
    Method
    Description
    Table
    select(org.apache.flink.table.expressions.Expression... fields)
    Performs a selection operation on a over windowed table.

  • Method Details

    • select

      Table select(org.apache.flink.table.expressions.Expression... fields)
      Performs a selection operation on a over windowed table. Similar to an SQL SELECT statement. The field expressions can contain complex expressions and aggregations.

      Example: 

      
 overWindowedTable.select(
    $("c"),
    $("b").count().over($("ow")),
    $("e").sum().over($("ow"))
 );

      Scala Example: 

      
 overWindowedTable.select('c, 'b.count over 'ow, 'e.sum over 'ow)