Package org.hotrod.runtime.livesql.expressions.analytics

Class WindowExpression<T>

  • Type Parameters:
    T - The type of the evaluated expression
    All Implemented Interfaces:
    ResultSetColumn
    public class WindowExpression<T>
extends Expression<T>
     
                  Expression{T}
                    ^       ^
                    |       |
     WindowExpression{T}   AggregationFunction{T}
                              ^              ^                   {I} WindowableFunction{T}         .over()
                              |              |                               ^  ^
   NonWindowableAggregationFunction{T}  WindowableAggregationFunction{T}.....:  :.....AnalyticFunction{T}
    ^                                    ^    ^                                          ^             ^
    |                                    |    |                                          |             |
    |            NumericAggregationFunction  StringAggregationFunction  PositionalAnalyticFunction{?}  |
    |                 ^                         ^                          ^                           |
    |- Count          |- Sum                    |- GroupConcat             |- Lead                     |- RowNumber
    |- CountDistinct  |- Avg                                               |- Lag                      |- Rank
    |- SumDistinct    |- Min                                                                           |- DenseRank
    |- AvgDistinct    |- Max                                                                           |- NTile
    |- GroupConcatDistinct
 
 
   SQL.sum(a.salary) -- WindowableFunction                            .over()
   .over() -- WindowFunctionOverStage{T}                              .partitionBy()  .orderBy()  .end()
   .partitionBy(expression...) -- WindowFunctionPartitioningStage{T}  .orderBy()  .end()
   .orderBy(expression...) -- WindowFunctionOrderingStage{T}          .end()
   .end() -- Expression{T}