jackc/pgx · error

unable to encode %v

Error message

unable to encode %v

What it means

Error "unable to encode %v" thrown in jackc/pgx.

Source

Thrown at pgtype/array_codec.go:140

			buf = append(buf, ',')
		}

		for _, dec := range dimElemCounts {
			if i%dec == 0 {
				buf = append(buf, '{')
			}
		}

		elem := array.Index(i)
		var elemBuf []byte
		isNil, callNilDriverValuer := isNilDriverValuer(elem)
		if !isNil {
			elemType := reflect.TypeOf(elem)
			if lastElemType != elemType {
				lastElemType = elemType
				encodePlan = p.m.PlanEncode(p.ac.ElementType.OID, TextFormatCode, elem)
				if encodePlan == nil {
					return nil, fmt.Errorf("unable to encode %v", array.Index(i))
				}
			}
			elemBuf, err = encodePlan.Encode(elem, inElemBuf)
			if err != nil {
				return nil, err
			}
		} else if callNilDriverValuer {
			elemBuf, err = (&encodePlanDriverValuer{m: p.m, oid: p.ac.ElementType.OID, formatCode: TextFormatCode}).Encode(elem, inElemBuf)
			if err != nil {
				return nil, err
			}
		}

		if elemBuf == nil {
			buf = append(buf, `NULL`...)
		} else {
			buf = append(buf, quoteArrayElementIfNeeded(string(elemBuf))...)
		}

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgtype/array_codec.go:140 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/7380d283dc4e8c6b.json. Report an issue: GitHub.