Error detection in data base systems

摘要: Incorrect data poses a serious impediment to the effective use of computerized bases. Conventional approaches design and implementation automated error detection systems are inadequate for large complex Partly, this derives from inherent intricacy problem, with decisions being required as what checks perform, how when do checking, respond should an be found; writing procedures accomplish these functions is difficult programming task. Also at fault unrealistic overly simplistic view correctness embodied in most contemporary systems."Intelligent" checking required, which possess more extensive knowledge base environment. They will need understand structure world models; way used, relative importance its various components; sources errors that might occur costs detecting them; patterns rates actually occur. Such system would then position detect wide range errors, allocating resources systematic fashion responding appropriately different situations.