Tuning Collections in Queries [1]

[To Introduction

I will continue series about tuning collections in queries starting from the simplest case – collection of values joined to one table. Our subject SQL statements look similar to the following two forms. Read the rest of this entry »

Tuning Collections in Queries [Introduction]

[To Next Article [1]] [To Performance Study]

If you never heard of using collections instead of regular IN-LIST expressions, you might want to read varying elements in IN list article from AskTom. It unfortunately has little information about the way CBO treats collections. So, if you have problems with tuning queries that employ nested tables or just evaluating what is in the way please read on. Read the rest of this entry »