Title :
A note on “Incomplete relational database models based on intervals”
Author :
Chiu, Jui-Shang ; Chen, Arbee L P
Author_Institution :
Dept. of Comput. Sci., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
2/1/1996 12:00:00 AM
Abstract :
For original paper, see A. Ola and G. Ozsoyoglu, ibid., vol. 5, no. 2, pp. 293-308 (1993). In that paper, a family of relational database models (M-1 to M-5) were proposed to represent unknown values by intervals. Relational operators were extended for evaluating queries on these models. In this paper, we stultify the theorems, claiming that query evaluation in models M-2, M-3 and M-5 is sound
Keywords :
data structures; database theory; query processing; relational algebra; relational databases; incomplete relational database models; intervals; query evaluation; relational operators; unknown values representation; Algebra; Computer science; Electronic mail; Query processing; Relational databases;
Journal_Title :
Knowledge and Data Engineering, IEEE Transactions on
