The effect of a judgment against an executor or administrator on account of a claim against the estate of his testator or intestate, is only to establish the claim as if it had been allowed by him, so as to require it to be satisfied in due course of administration, unless it appears that the complaint alleged assets in his hands applicable to the satisfaction of such claim and that such allegation was admitted or found to be true, in which case the judgment may be enforced against the executor or administrator personally.