Module datafusion::physical_expr::window

Structs

• BuiltInWindowExpr
  A window expr that takes the form of a BuiltInWindowFunctionExpr.
• PlainAggregateWindowExpr
  A window expr that takes the form of an aggregate function.
• SlidingAggregateWindowExpr
  A window expr that takes the form of an aggregate function that can be incrementally computed over sliding windows.
• WindowState

Enums

• NthValueKind
  Tag to differentiate special use cases of the NTH_VALUE built-in window function.

Traits

• BuiltInWindowFunctionExpr
  Evaluates a window function by instantiating a [PartitionEvaluator] for calculating the function’s output in that partition.
• WindowExpr
  Common trait for window function implementations

Type Aliases

• PartitionBatches
  The IndexMap (i.e. an ordered HashMap) where record batches are separated for each partition.
• PartitionKey
  Key for IndexMap for each unique partition
• PartitionWindowAggStates