Module rank

Implementation of rank, dense_rank, and percent_rank window functions, which can be evaluated at runtime during query execution.

Structs

Rank

Rank calculates the rank in the window function with order by

RankState

State for the RANK(rank) built-in window function.

Enums

RankType

Functions

dense_rank

Create a WindowFunction expression for DenseRank user-defined window function.

dense_rank_udwf

Returns a WindowUDF for dense_rank.

percent_rank

Create a WindowFunction expression for PercentRank user-defined window function.

percent_rank_udwf

Returns a WindowUDF for percent_rank.

rank

Create a WindowFunction expression for Rank user-defined window function.

rank_udwf

Returns a WindowUDF for rank.