Method for transforming sql queries

G - Physics – 06 – F

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G06F 17/30 (2006.01) G06F 7/00 (2006.01)

Patent

CA 2397405

A computer-implemented method for transforming an SQL query comprising a WHERE clause having nested SELECT expressions. The expression in the WHERE clause being transformed by the iterative application of rules to comprise ThereExists expressions and associated truth-value expressions. Further transforming the expression to form a truth expression having the IS operator and iteratively applying further rules to translate 3-valued logic to 2-valued logic. Carrying out a further transformation to remove NOT expressions from the expression and to remove any ThereExists expressions so as to define an expression in 2-valued logic with simplified SELECT expressions.

Une méthode par ordinateur pour transformer une requête SQL comportant une clause WHERE incorporant des expressions SELECT. L'expression dans la clause WHERE étant transformée par l'application itérative de règles pour comprendre des expressions ThereExists et des expressions de valeur de vérité. En outre transformant l'expression pour former une expression de vérité ayant un opérateur IS et, de manière itérative, appliquant des règles supplémentaires pour traduire une logique valuée 3 vers une logique valuée 2. Effectuant une nouvelle transformation pour supprimer les expressions NOT de l'expression et toutes les expressions ThereExists afin de définir une expression en logique valuée 2 avec des expressions SELECT simplifiées.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method for transforming sql queries does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for transforming sql queries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for transforming sql queries will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1488977

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.