jackc/pgx · error

cannot scan %T

Error message

cannot scan %T

What it means

Error "cannot scan %T" thrown in jackc/pgx.

Source

Thrown at pgtype/uuid.go:88

}

// Scan implements the [database/sql.Scanner] interface.
func (dst *UUID) Scan(src any) error {
	if src == nil {
		*dst = UUID{}
		return nil
	}

	if src, ok := src.(string); ok {
		buf, err := parseUUID(src)
		if err != nil {
			return err
		}
		*dst = UUID{Bytes: buf, Valid: true}
		return nil
	}

	return fmt.Errorf("cannot scan %T", src)
}

// Value implements the [database/sql/driver.Valuer] interface.
func (src UUID) Value() (driver.Value, error) {
	if !src.Valid {
		return nil, nil
	}

	return encodeUUID(src.Bytes), nil
}

func (src UUID) String() string {
	if !src.Valid {
		return ""
	}

	return encodeUUID(src.Bytes)
}

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgtype/uuid.go:88 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/d33dfbfbf096f2f1.json. Report an issue: GitHub.