include in his suit the whole claim pertaining to that cause of action. But if he gives up a part of the claim based on the said cause of action or omits to sue in connection with the same, the he cannot subsequently resurrect the said claim based on the same cause of action. So far as sub-r. (3) is concerned, before the second suit of the plaintiff can be held to be barred by the same, it must be shown that the second suit is based on the same cause of action on which the earlier suit was based and if the cause of action is the same in both the suits and if in the earlier suit plaintiff had not sued for any of the reliefs available to it on the basis of that cause of action, the reliefs which it had failed to press into service in that suit cannot be subsequently prayed for except with the leave of the court. It must, therefore, be shown by the defendants for supporting their plea of bar of O.11, R.2, sub-r.(3) that the second suit of the plaintiff filed is based on the same cause of action on which its earlier suit was based and that because it had not prayed for any relief and it had not obtained leave of the court in that connection, it cannot sue for that relief in the present second suit.”