A nonnumeric argument is converted to a numeric value based on implicit type conversion rules. If the argument cannot be converted, an error is reported. See Data Type Conversions.
A character string arg is converted to a numeric value of the FLOAT data type.
ABS cannot be applied to the following types of arguments:
- BYTE or VARBYTE
- BLOB or CLOB
- CHARACTER or VARCHAR if the server character set is GRAPHIC