** "Referential integrity update trigger for" customer LOCAL llRetVal llRetVal = .t. PRIVATE pcParentDBF,pnParentRec,pcChildDBF,pnChildRec,pcParentID,pcChildID PRIVATE pcParentExpr,pcChildExpr STORE "" TO pcParentDBF,pcChildDBF,pcParentID,pcChildID,pcParentExpr,pcChildExpr STORE 0 TO pnParentRec,pnChildRec IF _triggerlevel=1 BEGIN TRANSACTION PRIVATE pcRIcursors,pcRIwkareas,pcRIolderror,pnerror,; pcOldDele,pcOldExact,pcOldTalk,pcOldCompat,PcOldDBC pcOldTalk=SET("TALK") SET TALK OFF pcOldDele=SET("DELETED") pcOldExact=SET("EXACT") pcOldCompat=SET("COMPATIBLE") SET COMPATIBLE OFF SET DELETED ON SET EXACT OFF pcRIcursors="" pcRIwkareas="" pcRIolderror=ON("error") pnerror=0 ON ERROR pnerror=rierror(ERROR(),message(),message(1),program()) IF TYPE('gaErrors(1)')<>"U" release gaErrors ENDIF PUBLIC gaErrors(1,12) pcOldDBC=DBC() SET DATA TO ("TASTRADE") ENDIF first trigger LOCAL lcParentID && parent's value to be sought in child LOCAL lcOldParentID && previous parent id value LOCAL lcChildWkArea && child work area handle returned by riopen LOCAL lcChildID && child's value to be sought in parent LOCAL lcOldChildID && old child id value LOCAL lcParentWkArea && parentwork area handle returned by riopen LOCAL lcStartArea lcStartArea=select() llRetVal=.t. lcParentWkArea=select() SELECT (lcParentWkArea) pcParentDBF=dbf() pnParentRec=recno() lcOldParentID=OLDVAL("CUSTOMER_ID") pcParentID=lcOldParentID pcParentExpr="CUSTOMER_ID" lcParentID=CUSTOMER_ID IF lcParentID<>lcOldParentID lcChildWkArea=riopen("orders") IF lcChildWkArea<=0 IF _triggerlevel=1 DO riend WITH .F. ENDIF at the end of the highest trigger level SELECT (lcStartArea) RETURN .F. ENDIF not able to open the child work area pcChildDBF=dbf(lcChildWkArea) SELECT (lcChildWkArea) SCAN FOR CUSTOMER_ID=lcOldParentID pnChildRec=recno() pcChildID=CUSTOMER_ID pcChildExpr="CUSTOMER_ID" IF NOT llRetVal EXIT ENDIF && not llretval llRetVal=riupdate("CUSTOMER_ID",lcParentID,"CUSTOMER") ENDSCAN get all of the orders records =rireuse("orders",lcChildWkArea) IF NOT llRetVal IF _triggerlevel=1 DO riend WITH llRetVal ENDIF at the end of the highest trigger level SELECT (lcStartArea) RETURN llRetVal ENDIF ENDIF this parent id changed IF _triggerlevel=1 do riend with llRetVal ENDIF at the end of the highest trigger level SELECT (lcStartArea) RETURN llRetVal ** "End of Referential integrity Update trigger for" customer ******************************************************************************** ******************************************************************************** ** "Referential integrity delete trigger for" employee