E@DBLOCKPRV
Name
The E@DBLOCKPRV call has the following format:
DN@<Logical>(E@DBLOCKPRV)
where <Logical> identifies the database file to use to perform the E@DBLOCKPRV call.
Description
Once you have defined a position in the file with a successful E@DBLOCKNLT, use E@DBLOCKPRV to process the record previous to the current position. This routine reads the record preceding the current record for this index and prepares it for updating by E@DBSTORE.
Using the API in a Program
You must precede E@DBLOCKPRV with E@DBLOCKGE.
Input Values
| Field | Description |
|---|---|
| <Logical> | You must specify the database index name that you want to create a record in. |
| Record retrieval variables (also known as D@ fields) | You must populate the index key fields used to locate the record before using this call. |
Return Values
| Field | Description |
|---|---|
|
D<prefix>@NOTFOUND – or – E@KEY@FOUND |
The Modify routines set D<prefix>@NOTFOUND to FALSE if a record is found, TRUE if a record is not found, or E@KEY@FOUND if the keys are found. |