@Override
    public String format() {
        String value = getValue().toString();
        if (!value.startsWith("'") && !value.startsWith("\"")) {
            return String.format("'%s'", value);
        }
        return value;
    }
StringConstantParam constructor

@param value It is used to store string constant value
inlong-sort/sort-common/src/main/java/org/apache/inlong/sort/protocol/transformation/StringConstantParam.java