Jaa

reflect function

  • Artikkeli

Applies to: check marked yes Databricks Runtime 11.3 LTS and above

Calls a method with reflection.

The method might return an exception. To return a NULL instead, use try_reflect.

Syntax

reflect(class, method [, arg1] [, ...])

Arguments

  • class: A STRING literal specifying the java class.
  • method: A STRING literal specifying the java method.
  • argN: An expression with a type appropriate for the selected method.

Returns

A STRING.

Examples

> SELECT reflect('java.util.UUID', 'randomUUID');
 c33fb387-8500-4bfa-81d2-6e0e3e930df2

> SELECT reflect('java.util.UUID', 'fromString', 'a5cf6c42-0c85-418f-af6c-3e4e5b1328f2');
 A5cf6c42-0c85-418f-af6c-3e4e5b1328f2

> SELECT reflect('java.lang.Integer', 'divideUnsigned',10,0);
 Error

> SELECT try_reflect('java.lang.Integer', 'divideUnsigned',10,0);
 NULL