Package dev.frostlake.functions.scalar.semistructured

Class ToVariant

java.lang.Object
dev.frostlake.functions.BuiltInFunction
dev.frostlake.functions.scalar.semistructured.ToVariant
public class ToVariant extends BuiltInFunction
TO_VARIANT(expr) — wraps a value as a typed VARIANT. A VARCHAR becomes a variant STRING and is NEVER parsed (live-verified: TO_VARIANT('{"a":1}') is a string, not an object — it does not equal PARSE_JSON of the same text); an already semi-structured value passes through; scalars wrap as their typed variant counterpart. NULL stays NULL.

  • Constructor Details

    • ToVariant

      public ToVariant()

  • 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