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/line.go:52

	return line, nil
}

func (line *Line) Set(src any) error {
	return fmt.Errorf("cannot convert %v to Line", src)
}

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

	if src, ok := src.(string); ok {
		return scanPlanTextAnyToLineScanner{}.Scan([]byte(src), line)
	}

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

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

	buf, err := LineCodec{}.PlanEncode(nil, 0, TextFormatCode, line).Encode(line, nil)
	if err != nil {
		return nil, err
	}
	return string(buf), err
}

type LineCodec struct{}

func (LineCodec) FormatSupported(format int16) bool {

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgtype/line.go:52 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/c63d26b7ec0d1fdd.json. Report an issue: GitHub.