@NonNull
    @Override
    public String toString() {
        return getSql();
    }
creates an SQL LIKE expression. E.g. given escapedPattern "test%" it will return "like 'test%'".
Backslash ('\') can be used to escape % and _. E.g. "test\%%" will result in "like 'test\%%' escape '\'
main/src/main/java/cgeo/geocaching/storage/SqlBuilder.java