Micro Focus Enterprise Developer 2.3 Update 2 for Eclipse > Programming > Mainframe Programming > AppMaster Builder > Reference > Fields, Flags, and Exit Points > Fields and Flags, VSAM Online

Fields and Flags, VSAM Online

Use AMB-defined data fields and S-COBOL flags in your program.

Restriction: This topic applies only when the AppMaster Builder AddPack has been installed, and applies only to Windows platforms.

Field or Flag Name	Associated Calls	Description
APS- `shortrecname`-VAR	DB-OBTAIN DB-STORE DB-MODIFY DB-PROCESS DB-ERASE	Field that contains actual record length after a successful record retrieval (direct or sequential for DB-OBTAIN and DB-PROCESS. See Skip Sequence Processing below. `Shortrecname` comes from the subschema definition; it is the REC card SHORT keyword.
APS-END-PROCESS	DB-PROCESS	Flag that terminates DB-PROCESS loop. Example: TRUE RESET-OBTAIN
APS-VSAM-NUMREC	DB-ERASE	Field that contains number of records deleted after key-qualified ERASE with partial key length specified.
`ddname`-APS- `KEYnumber`	DB-OBTAIN DB-PROCESS	Field that contains AMB-generated key name for use in skip-sequential processing. See also Skip Sequence Processing below. `Ddname` is the subschema file. Example: ORDER-APS-KEY1
`ddname`-RBA	DB-OBTAIN DB-PROCESSDB-STORE	Field that contains relative byte address (RBA) of a retrieved, stored ESDS file record. See also ESDS Supportand Skip Sequence Processingbelow. `Ddname` is the subschema file. Generated field definition is`Ddname`-RBA PIC S9(08) COMP
`ddname`-RRN	DB-OBTAIN DB-PROCESSDB-STORE	Field that contains relative record number (RRN) of a retrieved or stored RRDS file record. See also RRDS Supportand Skip Sequence Processing below. Generated field definition is`Ddname`-RBA PIC S9(08) COMP
RESET-OBTAIN	DB-OBTAIN DB-PROCESS	Flag that resets browse to beginning of file. When used with PREV, resets to end of file. Example: TRUE RESET-OBTAIN

ESDS support:

Ddname-RBA provides access to a specific relative byte address (RBA). The current retrieved or written (stored) record determines the RBA; every successful READNEXT, READPREV, and WRITE operation updates the RBA.
DB-ERASE cannot delete a record from an ESDS file.
The operator must be EQUAL or = for a direct or positional DB-OBTAIN and for a qualified DB-PROCESS.
Assign ddname-RBA an RBA value prior to a DB-STORE or direct (key-specified) call.
If a key qualification specifies a non-existent RBA, the ILLOGIC condition occurs (the DB status flag AB-ON-REC). The AMB-supplied abnormal condition processing may need to be customized to access this condition.

RRDS support:

Ddname-RRN provides access to a specific relative record number (RRN). The current retrieved determines the RRN; every successful READNEXT and READPREV operation updates the RRN.
Assign ddname-RRN a RRN value prior to a DB-STORE or direct (key-specified) call.

Skip sequence processing:

Skip-sequential processing moves new key search criteria to a AMB-generated key while an active sequential DB-OBTAIN or DB-PROCESS browse is in progress. The following indicates the AMB-generated keys by target.

File Type	Record Key
KSDS	`ddname`-APS-KEY`number`
	`Number` indicates the key number, as follows 1 = Prime record key
	The remaining numbers correspond to the order of the DDI IDX subschema cards for that record 2 = First alternate index, 3 = Second alternate index, . . .
	The Micro Focus FCT facility supports only one alternate index.
ESDS	`ddname`-RBA PIC S9(08) COMP.
RRDS	`ddname`-RRN PIC S9(08) COMP.

Variable length files

VSAM provides the APS-shortrecname-VAR field, which contains length information for variable length files, for each record definition in the subschema.
APS-shortrecname-VAR must be updated with the calculated record length prior to all DB-STORE and DB-MODIFY calls. For example, the following updates APS-CUST-VAR with the actual length of CUST-RECORD prior to the DB-STORE.
```
APS-CUST-VAR = WS-FIXED-PORTION +
... (CUST-NBR-ORDERS * WS-OCCURS-LENGTH)
DB-STORE REC CUST-RECORD
```