jackc/pgx · error

unknown format code

Error message

unknown format code

What it means

Error "unknown format code" thrown in jackc/pgx.

Source

Thrown at rows.go:323

			continue
		}

		if dt, ok := rows.typeMap.TypeForOID(fd.DataTypeOID); ok {
			value, err := dt.Codec.DecodeValue(rows.typeMap, fd.DataTypeOID, fd.Format, buf)
			if err != nil {
				rows.fatal(err)
			}
			values = append(values, value)
		} else {
			switch fd.Format {
			case TextFormatCode:
				values = append(values, string(buf))
			case BinaryFormatCode:
				newBuf := make([]byte, len(buf))
				copy(newBuf, buf)
				values = append(values, newBuf)
			default:
				rows.fatal(errors.New("unknown format code"))
			}
		}

		if rows.Err() != nil {
			return nil, rows.Err()
		}
	}

	return values, rows.Err()
}

func (rows *baseRows) RawValues() [][]byte {
	return rows.values
}

func (rows *baseRows) Conn() *Conn {
	return rows.conn
}

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at rows.go:323 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of jackc/pgx@ec1a0befd2 (2026-08-04). Data as JSON: /data/errors/01d125a406391c1b.json. Report an issue: GitHub.