The following limits exist for the DBMaker protocol:
Maximum indexed key size: 1024
Maximum number of columns per key: 16
Maximum number of columns: 252
Maximum length of a char field: 3992 bytes
To achieve the same sort or retrieval sequence under DBMaker 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.
With the Acu4GL product, a maximum of 57 database tables can be open at one time by a single process.
Other limits are described in Appendix B in Book 4 of the ACUCOBOL-GT documentation.