Syntax
<arithmetic_function> ::= ABS (<expression>) | CEIL (<expression>) | EXP (<expression>) | FIXED (<expression>[,<unsigned_integer>[,<unsigend_integer>]]) | FLOAT (<expression>[,<unsigend_integer>]) | FLOOR (<expression>) | INDEX (<string_spec>,<string_spec>[,<expression>[,<expression>]]) | LENGTH (<expression>) | LN (<expression>) | LOG (<expression>) | NOROUND (<expression>) | PI | POWER (<expression>,<expression>) | ROUND (<expression>[,<expression>]) | SIGN (<expression>) | SQRT (<expression>) | TRUNC (<expression>[,<expression>])