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.