ITPUB

Nov 24, 2018 · Databases

Why Did My Oracle SQL Run in Parallel? Uncovering Hidden Parallelism and Fixing It

This article walks through diagnosing unexpected Oracle parallel execution, resolving DBLINK‑induced plan anomalies after a database upgrade, and fixing ORA‑00604 errors caused by missing domain indexes, providing step‑by‑step queries, parameter checks, and corrective ALTER statements to restore normal performance.