docs: private static String convertType(SQLExpr script) {
          String[] variance = Util.expr2Object(script).toString().split(";");
          String newScript = variance[variance.length - 1];
          if (newScript.trim().startsWith("def ")) {
              //for now ,if variant is string,then change to double.
              String temp = newScript.trim().substring(4).split("=")[0].trim();
  
              return " if( " + temp + " instanceof String) " + temp + "= Double.parseDouble(" + temp.trim() + "); ";
          } else return "";
  
  
      }