Package dev.frostlake.functions.scalar.vector

Class VectorL1Distance

java.lang.Object
dev.frostlake.functions.BuiltInFunction
dev.frostlake.functions.scalar.vector.VectorL1Distance
public class VectorL1Distance extends BuiltInFunction
VECTOR_L1_DISTANCE(v1, v2) — the Manhattan distance Σ|a−b|, as a FLOAT (float64).

Live-verified: VECTOR_L1_DISTANCE([1,2,3], [4,5,6]) is 9.0 for both VECTOR(FLOAT,3) and VECTOR(INT,3) operands. The 32-bit ELEMENTS feed 64-bit arithmetic — over [0.1,0.2,0.3] and [0.4,0.5,0.6] the account returns 0.9000000134110451, which is EXACTLY the float64 sum of the three float64-widened float32 differences; a float32 accumulation would have rounded to 0.90000004.

  • Constructor Details

    • VectorL1Distance

      public VectorL1Distance()

  • Method Details

    • evaluate

      public Object evaluate(List<Object> args)
      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:
      args - the argument values, in call order
      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