IDUG EMEA 2026

It often makes sense for analytical applications to store the data in column organized tables instead of row organized tables to get better performance. Especially scans on column organized tables are different from scans on row organized tables. This presentation investigates these differences. One major difference is the usage of Synopsis tables to speed up scans. Therefore, we will look in depth at how Synopsis tables work, how one can check Synopsis tables e.g., with SQL statements, and how one can ensure to get "good" Synopis tables, i.e., Synopsis tables which allow the elimination of unneccesary page accesses during the scans of important queries.