2203AERRORTier 2 — Caution✅ HIGH confidence

SQL/JSON member not found

Category: Data ExceptionVersions: Postgres 14+

What this means

SQLSTATE 2203A is raised when a SQL/JSON member accessor (dot operator) is applied to a JSON object and the specified key does not exist, in strict mode.

Why it happens

1SQL/JSON strict mode path expression accessing a key that does not exist in the JSON object

How to reproduce

Strict mode access to a non-existent JSON key.

trigger — this will ERROR

SELECT jsonb_path_query('{"a":1}'::jsonb, 'strict $.b');

ERROR: JSON object does not contain key "b"

Fix 1: Use lax mode to suppress the error for missing keys

When JSON keys may be optional.

fix

SELECT jsonb_path_query('{"a":1}'::jsonb, 'lax $.b');

Why this works

Lax mode returns an empty sequence for missing keys instead of raising an error.

Fix 2: Check for key existence with the ? operator

When key presence needs to be explicitly tested.

fix

SELECT '{"a":1}'::jsonb ? 'b'; -- false

Why this works

The ? operator checks key existence without raising an error.

Version notes

Postgres 14+SQL/JSON strict mode semantics refined in Postgres 14.

Sources

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

🔧 Source ref: Class 22 — Data Exception

Confidence assessment

✅ HIGH confidence

Standard SQLSTATE. Stable.