01000WARNINGTier 3 — Handle with care✅ HIGH confidence

warning

Category: WarningVersions: All Postgres versions

What this means

SQLSTATE 01000 is the generic warning code. Postgres emits it when a statement succeeds but the server wants to inform the client of a non-fatal condition that may indicate unexpected behaviour.

Why it happens

1A statement completed successfully but the server detected a non-fatal anomaly
2Custom application code raised a generic WARNING via RAISE WARNING

How to reproduce

Raising a generic warning from PL/pgSQL.

trigger — this will ERROR

DO $ BEGIN
  RAISE WARNING 'Something looks off but continuing';
END $;

WARNING: Something looks off but continuing

Fix 1: Inspect and handle the specific warning subcode

When a generic 01000 warning surfaces in application logs.

fix

Why this works

Check SQLSTATE and the warning message text. If the warning is expected (e.g., truncation), document it. If it is unexpected, investigate the query or stored procedure emitting it.

What not to do

✗

Suppress all warnings globally

Why it's wrong: Warnings often signal data quality issues or deprecated usage that will become errors in a future version.

Sources

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

🔧 Source ref: Class 01 — Warning

Confidence assessment

✅ HIGH confidence

Standard SQLSTATE warning class. Stable across all versions.