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That is the legacy of page 28. It wasn't just a guide. It was a warning: Respect the database, or the database will humble you. The "28" in your search isn't a version number. It’s a reminder that the deepest knowledge is always hidden in the appendices and the troubleshooting sections—not the glossy introduction.
Why? Because HANA’s optimizer relies on fresh statistics. If your stats were from the last system copy three months ago, HANA would generate a brilliant execution plan for a dataset that no longer existed. You’d see a query take 12 seconds that should take 200 milliseconds.
Why? Because the HANA calculation engine would try to union the Active table and the Change Log table for every single query. Over time, your "virtual" provider becomes slower than a standard InfoCube. You might be thinking, "BW 7.4 is out of mainstream maintenance. Why does this matter?"
If you have administered or developed on SAP BW 7.4 (the last great "classic" BW release before the HANA-only revolution), you know the truth: It was a hybrid beast.
The deep insight? The BIA INDEX (the legacy accelerator) was dead. In its place, HANA calculated views. But if you used standard MultiProviders or Infocubes (yes, people still used Infocubes in 7.4), you were forcing HANA to emulate a bitmap index.
The fix? Rebuild your CompositeProvider as a HANA Calculation View directly in the HANA Studio (or XSA). Then consume it in BW via an External View.
For years, a quiet, dog-eared document circulated among senior BW consultants: a PDF simply titled "SAP BW 7.4 Practical Guide." And within that guide, was the threshold.
Run transaction ST04 (DBACOCKPIT). Look for "High Wait Time on Locks." Then, run RSRT with the technical name of your slowest query. Turn on "HANA Execution Details."
Let’s crack open what that page really meant—and why its lessons are more critical today than ever. BW 7.4 was billed as "HANA-powered." But if you migrated an old system, you quickly realized that simply flipping the switch to "HANA-optimized" didn't fix everything. The practical guide on page 28 likely pointed to a single, brutal truth: Your InfoProviders were still physically optimized for row-based storage.
If you see Column Search taking longer than Join Processing , you have a classic 7.4 problem: Your HANA model is emulating a row-store.
