Auto-Syncing PostgreSQL Sequences: The One-Query Fix You’ll Wish You Knew Sooner
If you’ve ever restored data, merged dumps, or manually inserted IDs in PostgreSQL, you may have noticed that your SERIAL or IDENTITY columns start throwing duplicate key errors. That’s because the sequence that generates new IDs no longer matches the table’s current maximum. This one-query DO block scans your entire schema, finds every sequence-backed column, and automatically resets each sequence to MAX(id)+1 — safely, cleanly, and in a single pass.
