After making structural changes to an SAP BW InfoProvider, what should you do to ensure that existing BEx queries continue to work correctly?

Introduction / Context:
SAP BW projects often evolve over time, and InfoProviders such as InfoCubes or DataStore Objects may need structural changes, for example to add new characteristics or key figures. Existing BEx queries are closely tied to the structure of their underlying InfoProviders. When the structure changes, you must ensure that the queries are updated to reflect these changes. Certification questions frequently ask what needs to be done so that existing queries remain usable.

Given Data / Assumptions:

• An InfoProvider already has one or more BEx queries built on top of it.
• Structural changes have been made, such as adding or removing characteristics or key figures.
• You want to continue using the queries and avoid recreating them unnecessarily.
• Tools exist in BW to regenerate or adjust queries after InfoProvider changes.

Concept / Approach:
Queries store metadata about the InfoProvider structure at the time they were created or last adjusted. When the InfoProvider structure changes significantly, the query metadata can become inconsistent. SAP therefore provides functions to regenerate queries, which refresh their internal structure based on the current InfoProvider definition. In some cases, minor changes may require manual adjustment of the query layout. The goal is to realign the query with the InfoProvider so that it continues to run without errors.

Step-by-Step Solution:
Step 1: Recognise that queries are not fully self adjusting; they rely on a stable InfoProvider structure or a regeneration process when that structure changes. Step 2: Understand that after modifying an InfoProvider, you should review queries based on it and regenerate them using the appropriate tools. Step 3: Know that regeneration updates the internal metadata of the query so that it references the new characteristics and key figures correctly. Step 4: Compare the options and select the one that instructs you to regenerate or adjust queries rather than delete or ignore them. Step 5: Choose option a as the correct action.

Verification / Alternative check:
In a real system, if you remove or rename a characteristic that a query uses in its rows or filters, the query may fail or behave unexpectedly. BW tools allow you to open the query in the query designer, adjust its structure, and regenerate the technical definition. For certain structural changes, there are dedicated programs that regenerate queries in batch. After regeneration, the queries can run again, using the updated InfoProvider design. This behaviour confirms that regeneration or adjustment, not deletion, is the correct response to structural changes.

Why Other Options Are Wrong:
Option b is incorrect because queries do not always adapt automatically to all InfoProvider changes, especially when fields are removed or renamed. Option c is wrong because deleting and recreating every query is unnecessary and can be very time consuming; regeneration is the standard approach. Option d, switching to MultiProviders, does not solve the problem because MultiProviders also depend on underlying structures and may require regeneration. Option e is an extreme and inefficient reaction; archiving the InfoProvider and creating a new one for every small change is not practical.

Common Pitfalls:
A common mistake is to assume that queries will always continue to work regardless of any change to the InfoProvider, leading to runtime errors that surprise users. Another pitfall is to delete queries too quickly instead of using regeneration features. For certification and real world practice, it is important to remember that, after changing an InfoProvider structure, you should regenerate or manually adjust existing queries so that they stay in sync with the new design.

Final Answer:
After structural changes to an InfoProvider, you should regenerate or adjust existing queries so that their internal definitions are aligned with the new InfoProvider structure.