Patent ID: 8527502

Claim:
In an information technology system having an input device, an output device, an object oriented software data base (“data base”), a method instantiated during a query execution, the method comprising: a. Receiving a query string from a user via the input device; b. Forming a query tree; c. Selecting an equivalence join node of the query tree having at least two child nodes wherein both child nodes are projection node software objects; d. Designating a near node from the two child nodes; e. Designating a far node from the two child nodes; f. Instantiating a near tuple of the near node; g. Reading a far object identification (“the far OID”) of the far node as referenced by the near node; h. Detecting an anomaly associated with the far OID; and i. Informing the user via the output device of a descriptive quality of the detected anomaly associated with the far OID when the near tuple fails to reference the far node, wherein a failure of reference of the near node to the far node is determined and reported to a user at the instance of a query process.