googleapis/mcp-toolbox · error

unable to parse row: %w

Error message

unable to parse row: %w

What it means

Error "unable to parse row: %w" thrown in googleapis/mcp-toolbox.

Source

Thrown at internal/sources/postgres/postgres.go:129

func (s *Source) PostgresPool() *pgxpool.Pool {
	return s.Pool
}

func (s *Source) RunSQL(ctx context.Context, statement string, params []any) (any, error) {
	statement = sqlcommenter.PrependComment(ctx, statement, SourceType, s.SQLCommenter)
	results, err := s.PostgresPool().Query(ctx, statement, params...)
	if err != nil {
		return nil, fmt.Errorf("unable to execute query: %w", err)
	}
	defer results.Close()

	fields := results.FieldDescriptions()
	out := []any{}
	for results.Next() {
		values, err := results.Values()
		if err != nil {
			return nil, fmt.Errorf("unable to parse row: %w", err)
		}
		row := orderedmap.Row{}
		for i, f := range fields {
			val := sources.NormalizeValue(values[i], f.DataTypeOID)
			row.Add(f.Name, val)
		}
		out = append(out, row)
	}
	// this will catch actual query execution errors
	if err := results.Err(); err != nil {
		return nil, fmt.Errorf("unable to execute query: %w", err)
	}
	return out, nil
}

func initPostgresConnectionPool(ctx context.Context, tracer trace.Tracer, name, host, port, user, pass, dbname string, queryParams map[string]string, queryExecMode string, connectTimeout *int) (*pgxpool.Pool, error) {
	//nolint:all // Reassigned ctx
	ctx, span := sources.InitConnectionSpan(ctx, tracer, SourceType, name)

View on GitHub (pinned to 8cc6e09de2)

When it happens

Trigger: Thrown at internal/sources/postgres/postgres.go:129 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of googleapis/mcp-toolbox@8cc6e09de2 (2026-09-05). Data as JSON: /api/errors/ebe8d5131cc509a4. Report an issue: GitHub.