Defining a physical file using DDS
You use file-level, record-level, field-level, and key-field-level entries to define a physical file with data description specifications (DDS).
A physical file can contain only one record format. To define a physical file, follow these steps:
The maximum number of fields in a record format is 8000. If any of the fields in the record format are date, time, timestamp, variable length, or allows the null value, then the actual maximum number of fields can be less than 8000. The maximum number of fields can vary depending on the number of fields and combinations of fields that occur within the record format. The maximum number of bytes in a record format is 32 766 if variable length fields are not included and 32 740 if variable length fields are included.