DbServer.SetSelectiveRelation Method |
Set a selective relation from this server to the child server; standard database operations are restricted to those records that match the relation.
Namespace: VO
Assembly: VORDDClasses (in VORDDClasses.dll) Version: 2.7
SyntaxVIRTUAL METHOD SetSelectiveRelation( oDBChild AS USUAL := NIL, uRelation AS USUAL := NIL, cRelation AS USUAL := NIL ) AS USUAL
Parameters
- oDBChild (Optional)
- Type: Usual
The server attached to the child server must be specified as a DBServer object (not as an alias). If <oDBChild> is omitted, all relations for this server are removed (the recommended way of doing this is the ClearRelations() method). - uRelation (Optional)
- Type: Usual
The relation code block for the server or the name or symbol representing the field from this server; a code block is constructed and macro-compiled - cRelation (Optional)
- Type: Usual
When the relation is specified as a code block, a string version of the code block can be provided as well; it is returned by the Relation() method.
Return Value
Type: UsualTRUE if successful; otherwise, FALSE.
Remarks
Sends a NotifyRecordChange message to the child server, if successful.
As always, the expression should match or be a partial index of the controlling index of the child's work area.
Examples
The API can take these forms:
X#
1oDBCustomer:SetSelectiveRelation(oDBOrders, {||_FIELD->CustNo},"CustNo") 2oDBCustomer:SetSelectiveRelation(oDBOrders, #CustNo) 3oDBCustomer:SetSelectiveRelation(oDBOrders, {#LastName,#Initial,#FirstName})
See Also