jackc/pgx · error

invalid arg type: %T

Error message

invalid arg type: %T

What it means

Error "invalid arg type: %T" thrown in jackc/pgx.

Source

Thrown at internal/sanitize/sanitize.go:87

			arg := args[argIdx]
			switch arg := arg.(type) {
			case nil:
				p = null
			case int64:
				p = strconv.AppendInt(buf.AvailableBuffer(), arg, 10)
			case float64:
				p = strconv.AppendFloat(buf.AvailableBuffer(), arg, 'f', -1, 64)
			case bool:
				p = strconv.AppendBool(buf.AvailableBuffer(), arg)
			case []byte:
				p = QuoteBytes(buf.AvailableBuffer(), arg)
			case string:
				p = QuoteString(buf.AvailableBuffer(), arg)
			case time.Time:
				p = arg.Truncate(time.Microsecond).
					AppendFormat(buf.AvailableBuffer(), "'2006-01-02 15:04:05.999999999Z07:00:00'")
			default:
				return "", fmt.Errorf("invalid arg type: %T", arg)
			}
			argUse[argIdx] = true

			buf.Write(p)

			// Prevent SQL injection via Line Comment Creation
			// https://github.com/jackc/pgx/security/advisories/GHSA-m7wr-2xf7-cm9p
			buf.WriteByte(' ')
		default:
			return "", fmt.Errorf("invalid Part type: %T", part)
		}
	}

	for i, used := range argUse {
		if !used {
			return "", fmt.Errorf("unused argument: %d", i)
		}
	}

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at internal/sanitize/sanitize.go:87 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/bb6520aea651dcd8.json. Report an issue: GitHub.