E@DBFILTERSUBR
Name
The E@DBFILTERSUBR call has the following format:
DN@<Logical>(E@DDBFILTERSUBR)
where <Logical> identifies the database file and index to use to perform the E@DBFILTERSUBR call.
Description
Makes the database call.
Using the API in a Program
The database routines perform an equal condition on all D@ Index fields up to the subrange field designated in the E@DBSUBRNG. It performs a "where greater-than and less-than" condition on this index field.
Input Values
| Field | Description |
|---|---|
| <Logical> | <Logical> in the E@ statement identifies the database file and index to use to perform the call. |
| Record retrieval variables (also known as D@ and D# fields) | Define the beginning and ending values of the last key by moving the appropriate values to the record retrieval fields named D@<KeyFieldName> and D#END#<KeyFieldName>. |
| E@DBBEGRNG | Move a number into E@DBBEGRNG in order to tell the interface which key is the last significant one defining the range. This number is equivalent to the position of the field in the index. |
| E@DBSUBRNG | Move a number into E@DBSUBRNG in order to tell the interface which key is the last significant one defining the range. This number is equivalent to the position of the field in the index. |
| Filter value parameter | Set this parameter using a method described in Setting the Filter Parameter Value, and create the filter using the routine described in U@FLTCREATE. |
Return Values
| Field | Description |
|---|---|
| D<prefix>@NOTFOUND | The Find 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. |
Programming Example
See the programming example for E@DBFINDFLMDSB.