The parameter
list that appears in SQL CALL statements
has the following syntax.
To understand the conventions that are used in
the syntax
diagram, see How to read syntax diagrams.

.-,--------------------.
V |
>>-(----+-parameter-marker-+-+--)------------------------------><
+-SQL-literal------+
'-NULL-------------'
- parameter-marker
- See Parameter markers in SQL statements.
- SQL-literal
- Specifies the literal value of the parameter. You can use SQL
literals only if your JDBC driver supports them.
- NULL
- Specifies a null value.