How to Investigate Analytics Reports That Differ After a Database Index Change

An index change should affect query performance, but query plans or application behavior may also alter which rows are returned.

Checks to make

Compare query text, plan, filters, and results before and after the change using a stable data snapshot. Check for timing-dependent queries or replica lag, then reconcile totals with the source of truth before updating dashboards.

When to get help

Analytics engineering can validate query result consistency and performance. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.