0Z000ERRORTier 3 — Handle with care✅ HIGH confidence

diagnostics exception

Category: Diagnostics ExceptionVersions: All Postgres versions

What this means

SQLSTATE 0Z000 is the generic diagnostics exception code. It is raised when an error occurs in the context of processing diagnostic information (e.g., GET DIAGNOSTICS in PL/pgSQL).

Why it happens

1Error while processing GET DIAGNOSTICS or similar diagnostic retrieval in a PL/pgSQL block

How to reproduce

Invalid use of GET DIAGNOSTICS.

trigger — this will ERROR

ERROR: diagnostics exception

Fix 1: Review GET DIAGNOSTICS usage in PL/pgSQL

When 0Z000 surfaces in a stored procedure.

fix

GET DIAGNOSTICS row_count = ROW_COUNT;

Why this works

Ensure GET DIAGNOSTICS is used after a DML statement and targets valid diagnostic items.

Sources

📚 Official docs: https://www.postgresql.org/docs/current/errcodes-appendix.html

🔧 Source ref: Class 0Z — Diagnostics Exception

Confidence assessment

✅ HIGH confidence

Standard SQLSTATE. Rarely encountered in practice.