Package dev.frostlake.functions.scalar.conditional

Class Greatest

java.lang.Object
dev.frostlake.functions.BuiltInFunction
dev.frostlake.functions.scalar.conditional.Greatest
public class Greatest extends BuiltInFunction

  • Constructor Details

    • Greatest

      public Greatest()

  • Method Details

    • geoRejection

      public SemiStructuredRejection geoRejection(int position)
      GREATEST ORDERS its arguments, and a GEOSPATIAL value has no order — where an OBJECT does. Live, GREATEST(o, o) returns the object while GREATEST(g, g) is "Invalid argument types for function 'GREATEST': (GEOGRAPHY, GEOGRAPHY)" (SQLSTATE 42P13), and LEAST splits the same way. This is the boundary of the NULL-choosing family rather than a property of it: IFF, COALESCE, NVL, IFNULL, NVL2, DECODE and CASE all return a geo value happily, because none of them compares one.
      Overrides:
      geoRejection in class BuiltInFunction
      Parameters:
      position - the zero-based argument position being asked about
      Returns:
      the refusal this position gives a GEOGRAPHY or GEOMETRY value; by default, the union of the two semi-structured answers

    • evaluate

      public Object evaluate(List<Object> rawArgs)
      Description copied from class: BuiltInFunction
      Computes the function's result over its already-evaluated argument values. A SQL NULL argument arrives as Java null, and returning null makes the SQL result NULL.
      Specified by:
      evaluate in class BuiltInFunction
      Parameters:
      rawArgs - the argument values, in call order
      Returns:
      the function's value for these arguments, or null for SQL NULL

    • evaluate

      public Object evaluate(List<Object> args, CollationSpec collation)
      Under a collation the arguments are ordered by its rules, so 'a' outranks 'B' where it should.
      Overrides:
      evaluate in class BuiltInFunction
      Parameters:
      args - the argument values, in call order
      collation - the collation the call settled on, or null when it carries none
      Returns:
      the function's value for these arguments, or null for SQL NULL

    • getMinArgCount

      public int getMinArgCount()
      Description copied from class: BuiltInFunction
      The fewest arguments a call to this function may pass; fewer is an argument-count error.
      Specified by:
      getMinArgCount in class BuiltInFunction
      Returns:
      the minimum accepted argument count

    • getMaxArgCount

      public int getMaxArgCount()
      Description copied from class: BuiltInFunction
      The most arguments a call to this function may pass; Integer.MAX_VALUE marks a variadic function (see BuiltInFunction.isVariadic()).
      Specified by:
      getMaxArgCount in class BuiltInFunction
      Returns:
      the maximum accepted argument count