2203EERRORTier 2 — Caution✅ HIGH confidence

too many JSON object members

Category: Data ExceptionVersions: Postgres 14+

What this means

SQLSTATE 2203E is raised when a JSON object contains more key-value pairs than the maximum allowed in a specific SQL/JSON context.

Why it happens

1A SQL/JSON operation imposes a limit on the number of object members and the input exceeds it

How to reproduce

JSON object with too many members for the target context.

trigger — this will ERROR

ERROR: too many JSON object members

Fix 1: Reduce the JSON object key count or restructure the schema

When this error appears.

fix

Why this works

Split overly large JSON objects into nested structures, or use relational columns for high-cardinality data instead of storing everything in a single JSONB column.

Version notes

Postgres 14+SQL/JSON object member limit enforcement added 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. Rarely encountered in practice.