This section outlines, in a table, all the database access modes available in the different processing phases.
The table is divided into the following main phases:
| Data Store Type | Load File Information | Data Store Analysis | Data Store Sampling |
|---|---|---|---|
| DB2 (1) | Direct access / Sequential unload | Direct access / Sequential unload | Direct access / Sequential unload |
| SEQ | Direct access / Sequential copybook | Direct access / Sequential copybook | Direct access / Sequential copybook |
| GDG | Direct access / Sequential copybook | Direct access / Sequential copybook | Direct access / Sequential copybook |
| VSAM | Direct access / Sequential unload (REPRO) | Direct access / Sequential unload (REPRO) | Direct access / Sequential unload (REPRO) |
| DL/I | Sequential unload | Sequential unload | Sequential unload |
| Others (2) | Sequential unload / Customized I/O routine | Sequential unload / Customized I/O routine | Sequential unload / Customized I/O routine |
(1) Data automatically acquires the column definitions.
(2) Any other database, even from another operating system, can be managed in a sequential format. For databases running with the same system of Data Express, a customized I/O routine can be written and used for a direct access.