### SUBSTRAIT_SCALAR_TEST: v1.0
### SUBSTRAIT_INCLUDE: extension:io.substrait:functions_string
# basic: Basic examples without any special cases
concat_ws(','::str, 'Banana'::str, 'Apple'::str, 'Melon'::str) = 'Banana,Apple,Melon'::str
concat_ws(''::str, 'Banana'::str, 'Apple'::str) = 'BananaApple'::str
concat_ws(null::str?, 'Banana'::str, 'Apple'::str, 'Melon'::str) = null::str?
concat_ws(','::str, null::str?, 'Apple'::str, 'Melon'::str) = 'Apple,Melon'::str?
concat_ws(','::str, 'Apple'::str, null::str?, 'Melon'::str) = 'Apple,Melon'::str?