ubldprm
ubldprm builds the concatenated primary key for a record.
void
ubldprm(uc, mode)
struct uctrl *uc;
short mode;
Parameters
- uc—address of the current control block.
- mode—must have the value 0.
Description
ubldprm builds the concatenated primary
key for a record. The result is stored in the SQL buffer starting
at position uctrl->sqlbuf[1000]. The
length of the result is equal to uctrl->uprimlen.
When ubldprm is
called, the values of the primary key fields must be available in
the general I/O buffer. With a field-level connector, the actual
length of the primary key fields must be available in the uflen elements
in the field list.
ubldprm can
be called to prepare a uaddhit or uaddrec.
If the primary key has been defined as a ‘compound’ key
in the Uniface Application Objects Repository (that is, there is
more than one field in the key), Uniface uses the concatenated primary
key in the hitlist to identify the record. The DBMS connector can
use the ubldprm service function
to construct the concatenated primary key, before it adds the primary
key to the hitlist. The order of the fields in the concatenated primary
key is described in the index list. Index number one is by definition
the primary key.
This example returns
records that are found during the Select connector request. When
the mode of request is 0 or 3, the ubldprm service
function is used to construct the primary key needed to call the uaddrec service function.
The example creates the DrvAdminType data
structure. The structure of the DrvAdminType holds the PRA in its
PRA field and the primary key in its PKBuffer field. Such a structure
would usually be stored in the connector workspace (uctrl->udrv).
ReturnRecordsFoundInSelect ( struct uctrl *ControlBlock,
DrvAdminType *ConnectorAdministration )
{
unsigned char Dummy;
if ( ControlBlock->umode == 1 ||
ControlBlock->umode == 2 )
{
/* Ready: modes 1 and 2 do not require hit. */
}
else
{
if ( ControlBlock->umode == 4 )
{
usumhit ( ControlBlock );
}
else
{
/* For modes 0 and 3 */
ubldprm ( ControlBlock, DrvAdministration->PKBuffer );
uaddrec ( ControlBlock,
DrvAdministration->PRA,
ControlBlock->uralen,
DrvAdministration->PKBuffer,
ControlBlock->uprimlen,
(unsigned char*)Dummy, 0 );
}
}
}
