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RDDLIST()
Return an array of the available Replaceable Database Drivers (RDDs)
------------------------------------------------------------------------------
Syntax
RDDLIST([<nRDDType>]) --> aRDDList
Arguments
<nRDDType> is an integer that represents the type of the RDD you
wish to list. The constants RDT_FULL and RDT_TRANSFER represent the two
types of RDDs currently available.
RDDType Summary
------------------------------------------------------------------------
Constant Value Meaning
------------------------------------------------------------------------
RDT_FULL 1 Full RDD implementation
RDT_TRANSFER 2 Import/Export only driver
------------------------------------------------------------------------
RDT_FULL identifies full-featured RDDs that have all the capabilities
associated with an RDD.
RDT_TRANSFER identifies RDDs of limited capability. They can only
transfer records between files. You cannot use these limited RDD
drivers to open a file in a work area. The SDF and DELIM drivers are
examples of this type of RDD. They are only used in the implementation
of APPEND FROM and COPY TO with SDF or DELIMITED files.
Returns
RDDLIST() returns a one-dimensional array of the RDD names registered
with the application as <nRDDType>.
Description
RDDLIST() is an RDD function that returns a one-dimensional array that
lists the available RDDs.
If you do not supply <nRDDType>, all available RDDs regardless of type
are returned.
Examples
. In this example RDDLIST() returns an array containing the
character strings, "DBF", "SDF", "DELIM", "DBFCDX", and "DBFNTX":
REQUEST DBFCDX
.
. < statements >
.
aRDDs := RDDLIST()
// Returns {"DBF", SDF", "DELIM", "DBFCDX", "DBFNTX" }
. In this example, RDDLIST() returns an array containing the
character strings, "SDF" and "DELIM":
#include "rddsys.ch"
.
. < statements >
.
aImpExp := RDDLIST( RDT TRANSFER )
Files Rddsys.ch.
See Also:
RDDNAME()
RDDSETDEFAULT()
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