parse
CALL p()
----
CALL p()
CALL p() -- fully parenthesized
CALL p() -- literals removed
CALL _() -- identifiers removed

parse
CALL p(1, 'foo', 1.234, true, NULL)
----
CALL p(1, 'foo', 1.234, true, NULL)
CALL p((1), ('foo'), (1.234), (true), (NULL)) -- fully parenthesized
CALL p(_, '_', _, _, _) -- literals removed
CALL _(1, 'foo', 1.234, true, NULL) -- identifiers removed

error
CALL p
----
at or near "EOF": syntax error
DETAIL: source SQL:
CALL p
      ^

error
CALL
----
at or near "EOF": syntax error
DETAIL: source SQL:
CALL
    ^
