Enum dataflow_types::plan::top_k::TopKPlan[][src]

pub enum TopKPlan {
    MonotonicTop1(MonotonicTop1Plan),
    MonotonicTopK(MonotonicTopKPlan),
    Basic(BasicTopKPlan),
}
Expand description

A plan encapsulating different variants to compute a TopK operation.

Variants

MonotonicTop1(MonotonicTop1Plan)

Tuple Fields

A plan for Top1 for monotonic inputs.

MonotonicTopK(MonotonicTopKPlan)

Tuple Fields

A plan for TopK for monotonic inputs.

Basic(BasicTopKPlan)

Tuple Fields

A plan for generic TopK operations.

Implementations

Create a plan from the information provided. Here we decide on which of the TopK plan variants to select.

  • group_key - The columns serving as the group key.
  • order_key - The columns specifying an ordering withing each group.
  • offset - The number of rows to skip at the top. Provide 0 to reveal all rows.
  • limit - An optional limit of how many rows should be revealed.
  • arity - The number of columns in the input and output.
  • monotonic - true if the input is monotonic.

Trait Implementations

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