Module datafusion_physical_expr::window

Structs

• BuiltInWindowExpr
  A window expr that takes the form of a built in window function
• PartitionBatchState
  State for each unique partition determined according to PARTITION BY column(s)
• PlainAggregateWindowExpr
  A window expr that takes the form of an aggregate function Aggregate Window Expressions that have the form OVER({ROWS | RANGE| GROUPS} BETWEEN UNBOUNDED PRECEDING AND ...) e.g cumulative window frames uses PlainAggregateWindowExpr. Where as Aggregate Window Expressions that have the form OVER({ROWS | RANGE| GROUPS} BETWEEN M {PRECEDING| FOLLOWING} AND ...) e.g sliding window frames uses SlidingAggregateWindowExpr.
• SlidingAggregateWindowExpr
  A window expr that takes the form of an aggregate function Aggregate Window Expressions that have the form OVER({ROWS | RANGE| GROUPS} BETWEEN UNBOUNDED PRECEDING AND ...) e.g cumulative window frames uses PlainAggregateWindowExpr. Where as Aggregate Window Expressions that have the form OVER({ROWS | RANGE| GROUPS} BETWEEN M {PRECEDING| FOLLOWING} AND ...) e.g sliding window frames uses SlidingAggregateWindowExpr.
• WindowAggState
• WindowState

Traits

• BuiltInWindowFunctionExpr
  A window expression that is a built-in window function.
• WindowExpr
  A window expression that:

Type Definitions

• 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