The following limits exist for the ODBC protocol:
Maximum number of columns per key - 16
Maximum number of columns - varies with the driver
To achieve the same sort or retrieval sequence under ODBC as under the Vision
file system, place a BINARY directive immediately before each key field that contains signed numeric data. High values and low values can cause
problems in key fields. If you want data that uses the BINARY directive to be
stored as hexadecimal encoded CHAR types, you can specify
A-ODBC-USE-CHAR-FOR-BINARY in the configuration file.
Other limits are described in Appendix B of the ACUCOBOL-GT documentation.