jackc/pgx · error

too many parameter oids

Error message

too many parameter oids

What it means

Error "too many parameter oids" thrown in jackc/pgx.

Source

Thrown at pgproto3/parameter_description.go:48

	buf.Next(2)
	// Instead infer parameter count by remaining size of message
	parameterCount := buf.Len() / 4

	*dst = ParameterDescription{ParameterOIDs: make([]uint32, parameterCount)}

	for i := range parameterCount {
		dst.ParameterOIDs[i] = binary.BigEndian.Uint32(buf.Next(4))
	}

	return nil
}

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

	if len(src.ParameterOIDs) > math.MaxUint16 {
		return nil, errors.New("too many parameter oids")
	}
	dst = pgio.AppendUint16(dst, uint16(len(src.ParameterOIDs)))
	for _, oid := range src.ParameterOIDs {
		dst = pgio.AppendUint32(dst, oid)
	}

	return finishMessage(dst, sp)
}

// MarshalJSON implements encoding/json.Marshaler.
func (src ParameterDescription) MarshalJSON() ([]byte, error) {
	return json.Marshal(struct {
		Type          string
		ParameterOIDs []uint32
	}{
		Type:          "ParameterDescription",
		ParameterOIDs: src.ParameterOIDs,
	})

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgproto3/parameter_description.go:48 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/fe8961eed69851f6.json. Report an issue: GitHub.