Package org.apache.flink.table.api

Interface FlatAggregateTable

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      Table select​(org.apache.flink.table.expressions.Expression... fields)
      Performs a selection operation on a FlatAggregateTable table.

    • Method Detail

      • select

        Table select​(org.apache.flink.table.expressions.Expression... fields)
        Performs a selection operation on a FlatAggregateTable table. Similar to a SQL SELECT statement. The field expressions can contain complex expressions.

        Note: You have to close the flatAggregate with a select statement. And the select statement does not support aggregate functions.

        Example: 

        
 tableEnv.createTemporarySystemFunction("tableAggFunc", MyTableAggregateFunction.class);
 tab.groupBy($("key"))
   .flatAggregate(call("tableAggFunc", $("a"), $("b")).as("x", "y", "z"))
   .select($("key"), $("x"), $("y"), $("z"));

        Scala Example: 

        
 val tableAggFunc: TableAggregateFunction = new MyTableAggregateFunction
 tab.groupBy($"key")
   .flatAggregate(tableAggFunc($"a", $"b") as ("x", "y", "z"))
   .select($"key", $"x", $"y", $"z")