Package dev.frostlake.executor

Interface GroupOrderKeyResolver

public interface GroupOrderKeyResolver
Resolves the sort value of an ORDER BY item that could NOT be matched to a SELECT column after GROUP BY / aggregation — Snowflake allows ordering by a grouped column or an aggregate that is not in the SELECT list (e.g. SELECT grp FROM t GROUP BY grp, x ORDER BY x or … ORDER BY MAX(y)). The value is computed over the source rows of the output row's group, using its ORIGINAL (pre-sort) index.

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    resolve(int rowIndex, FrostlakeParser.OrderItemContext item)
    The ORDER BY value for the output row at rowIndex (its original position before sorting), computed over that row's group.

  • Method Details

    • resolve

      Object resolve(int rowIndex, FrostlakeParser.OrderItemContext item)
      The ORDER BY value for the output row at rowIndex (its original position before sorting), computed over that row's group.