boolean str = false;
if (s.startsWith(">=")) {
operator = new ExprGreaterThanOrEqualTo(null, null);
offset = 2;
} else if (s.startsWith("<=")) {
operator = new ExprLessThanOrEqualTo(null, null);
offset = 2;
} else if (s.startsWith("<>")) {
operator = new ExprNotEqual(null, null);
offset = 2;
} else if (s.startsWith("=")) {