function GetDBPath1(AliasName: string): TFileName;
var
  ParamList: TStringList;
begin
  ParamList := TStringList.Create;
  with Session do
  try
    GetAliasParams(AliasName, ParamList);
    Result := UpperCase(ParamList.Values['PATH']) + '\';
  finally
    Paramlist.Free;
  end;
end;

function GetDBPath2(AliasName: string): TFileName;
var
  ParamList: TStringList;
  i: integer;
begin
  ParamList := TStringList.Create;
  with Session do
  try
    try
      GetAliasParams(AliasName, ParamList);
    except
      for i := 0 to pred(DatabaseCount) do
        if (Databases[i].DatabaseName = AliasName) then
          ParamList.Assign(Databases[i].Params);
    end;
    Result := UpperCase(ParamList.Values['PATH']) + '\';
  finally
    Paramlist.Free;
  end;
end;

function GetDBPath3(ATable: TTable): TFileName;
var
  TblProps: CURProps;
  pTblName, pFullName: DBITblName;
begin
  with ATable do
  begin
    AnsiToNative(Locale, TableName, pTblName, 255);
    Check(DBIGetCursorProps(Handle, TblProps));
    Check(DBIFormFullName(DBHandle,
      pTblName,
      TblProps.szTableType,
      pFullName));
    Result := ExtractFilePath(StrPas(pFullName));
  end;
end;