This document contains a detailed description of each Adabas command. The commands are presented in alphabetical order for ease of reference.
The user is referred to the Adabas Messages and Codes for an explanation of all response codes which may result from Adabas commands.
The information is organized under the following headings:
| A1 Command: Update Record | Update record(s) (with hold option) |
| BT Command: Back Out Transaction | Remove database updates for ET logic users |
| C1 Command: Write a Checkpoint | Write checkpoint identifier, data protection log number and block number |
| C5 Command: Write User Data to Protection Log | Write user data to PLOG |
| CL Command: Close User Session | End/ET session and update database |
| E1 Command: Delete Record / Refresh File | Delete record or refresh file |
| ET Command: End Transaction | End and save current transaction |
| HI Command: Hold Record | Prevent record update by other users |
| L1 / L4 Command: Read Record | Read record of specified ISN Read and hold option |
| L2 / L5 Command: Read Physical Sequential | Read records in physical order Read in physical order and hold option |
| L3 / L6 Command: Read Logical Sequential | Read records in descriptor value order Read in descriptor value order with hold option |
| L9 Command: Read Descriptor Values | Read the values of a specified descriptor |
| LF Command: Read Field Definitions | Read the characteristics of all fields in a file |
| MC Command: Multi-Call | Reduce interprocess communications between an Adabas database and its application programs |
| N1 / N2 Command: Add Record | Add new database record with ISN assigned by
Adabas Add new database record with user-assigned ISN |
| OP Command: Open User Session | Open user session |
| RC Command: Release Command ID or Global Format Buffer ID | Release one or more command IDs or a global format buffer ID for the issuing user |
| RE Command: Read ET User Data | Read ET data for this, another, or all users |
| RI Command: Release Record | Release held record and ISN Release all records currently held by user |
| S1 / S2 / S4 Command: Find Records | Return count and ISNs of records satisfying the search
criterion Return count of records and ISNs in user-specified order |
| S8 Command: Process ISN Lists | Combine two ISN lists from the same file with an AND, OR, or NOT operation |
| S9 Command: Sort ISN List | Sort ISN list in ascending ISN or descriptor-specified sequence |
Please note that only those control block fields relevant to the command in question are shown in the control block. Also, in order to be compatible with new versions of Adabas, Software AG strongly recommends that you set all unused control block fields to their default values.
If errors occur while using the ACBX interface, Adabas may return additional information in the ACBXERRx fields, although this is not documented in the command documentation. Please refer to the Nucleus Response Codes in Messages and Codes for more information about this additional information.
If an Adabas call using the ACBX interface is made that requires buffer specifications, Adabas buffer descriptions (ABDs) must be used instead of the ACB fields for format buffer length, record buffer length, search buffer length, value buffer length and ISN buffer length.