BYTE_LENGTH64 returns an unsigned 64-bit value containing the byte length of the LONG BINARY column parameter.
BYTE_LENGTH64 also supports the LONG VARCHAR data type and LONG BINARY and LONG VARCHAR variables of any data size.
If you are licensed to use the Unstructured Data Analytics functionality, you can use this function with large object data.
See Unstructured Data Analytics in Sybase IQ > Function Support.