jackc/pgx · error

too many fields

Error message

too many fields

What it means

Error "too many fields" thrown in jackc/pgx.

Source

Thrown at pgproto3/row_description.go:107

		fd.DataTypeSize = int16(binary.BigEndian.Uint16(src[rp:]))
		rp += 2
		fd.TypeModifier = int32(binary.BigEndian.Uint32(src[rp:]))
		rp += 4
		fd.Format = int16(binary.BigEndian.Uint16(src[rp:]))
		rp += 2

		dst.Fields = append(dst.Fields, fd)
	}

	return nil
}

// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
func (src *RowDescription) Encode(dst []byte) ([]byte, error) {
	dst, sp := beginMessage(dst, 'T')

	if len(src.Fields) > math.MaxUint16 {
		return nil, errors.New("too many fields")
	}
	dst = pgio.AppendUint16(dst, uint16(len(src.Fields)))
	for _, fd := range src.Fields {
		dst = append(dst, fd.Name...)
		dst = append(dst, 0)

		dst = pgio.AppendUint32(dst, fd.TableOID)
		dst = pgio.AppendUint16(dst, fd.TableAttributeNumber)
		dst = pgio.AppendUint32(dst, fd.DataTypeOID)
		dst = pgio.AppendInt16(dst, fd.DataTypeSize)
		dst = pgio.AppendInt32(dst, fd.TypeModifier)
		dst = pgio.AppendInt16(dst, fd.Format)
	}

	return finishMessage(dst, sp)
}

// MarshalJSON implements encoding/json.Marshaler.

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgproto3/row_description.go:107 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/eb708f3147dbbf54.json. Report an issue: GitHub.