diff --git a/packages/fcl-web/src/webdata/sqldbwebdata.pp b/packages/fcl-web/src/webdata/sqldbwebdata.pp
index c706904971..81783a9d8f 100644
--- a/packages/fcl-web/src/webdata/sqldbwebdata.pp
+++ b/packages/fcl-web/src/webdata/sqldbwebdata.pp
@@ -44,7 +44,8 @@ Type
     Procedure DoApplyParams; override;
     Function SQLQuery : TSQLQuery;
     Function GetDataset : TDataset; override;
-    Function GetNewID : String; virtual;
+    Function DoGetNewID : String; virtual;
+    Function GetNewID : String;
     Function IDFieldValue : String; override;
     procedure Notification(AComponent: TComponent;  Operation: TOperation); override;
     Property SelectSQL : TStrings Index 0 Read GetS Write SetS;
@@ -273,7 +274,12 @@ Var
 
 begin
   ft:=GetParamtype(P,AValue);
-  If ft<>ftUnknown then
+  If (AValue='') and (not (ft in [ftString,ftFixedChar,ftWideString,ftFixedWideChar])) then
+    begin
+    P.Clear;
+    exit;
+    end;
+  If (ft<>ftUnknown) then
     begin
     try
       case ft of
@@ -358,7 +364,10 @@ begin
     if not B then
       begin
       If (P.Name=IDFieldName) and DoNewID then
-        SetTypedParam(P,GetNewID)
+        begin
+        GetNewID;
+        SetTypedParam(P,FLastNewID)
+        end
       else If Adaptor.TryFieldValue(P.Name,S) then
         SetTypedParam(P,S)
       else If Adaptor.TryParamValue(P.Name,S) then
@@ -394,12 +403,17 @@ begin
 {$ifdef wmdebug}SendDebug('Get dataset: done');{$endif}
 end;
 
-function TCustomSQLDBWebDataProvider.GetNewID: String;
-
+function TCustomSQLDBWebDataProvider.DoGetNewID: String;
 begin
   If Not Assigned(FOnGetNewID) then
     Raise EFPHTTPError.CreateFmt(SErrNoNewIDEvent,[Self.Name]);
   FOnGetNewID(Self,Result);
+end;
+
+function TCustomSQLDBWebDataProvider.GetNewID: String;
+
+begin
+  Result:=DoGetNewID;
   FLastNewID:=Result;
 end;