jackc/pgx · error

invalid format for line

Error message

invalid format for line

What it means

After stripping the outer braces from a line text value, the parser splits on commas and requires exactly three components (A, B, C). This guard fires when the split yields fewer than three parts — the inner content is not a comma-separated triple as the format requires.

Solutions

1. Store the value in canonical '{a,b,c}' format
2. Sanitize or reformat the source string before it reaches the database
3. Use binary format encoding for the line column

When it happens

Trigger: Thrown at pgtype/line.go:188 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: /api/errors/b8707dafb76d1c91. Report an issue: GitHub.

Appendix: source

Thrown at pgtype/line.go:188

	})
}

type scanPlanTextAnyToLineScanner struct{}

func (scanPlanTextAnyToLineScanner) Scan(src []byte, dst any) error {
	scanner := (dst).(LineScanner)

	if src == nil {
		return scanner.ScanLine(Line{})
	}

	if len(src) < 7 {
		return fmt.Errorf("invalid length for line: %v", len(src))
	}

	parts := strings.SplitN(string(src[1:len(src)-1]), ",", 3)
	if len(parts) < 3 {
		return fmt.Errorf("invalid format for line")
	}

	a, err := strconv.ParseFloat(parts[0], 64)
	if err != nil {
		return err
	}

	b, err := strconv.ParseFloat(parts[1], 64)
	if err != nil {
		return err
	}

	c, err := strconv.ParseFloat(parts[2], 64)
	if err != nil {
		return err
	}

	return scanner.ScanLine(Line{A: a, B: b, C: c, Valid: true})

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