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/date.go:58

	infinityDayOffset         = 2147483647
)

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

	switch src := src.(type) {
	case string:
		return scanPlanTextAnyToDateScanner{}.Scan([]byte(src), dst)
	case time.Time:
		*dst = Date{Time: src, Valid: true}
		return nil
	}

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

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

	if src.InfinityModifier != Finite {
		return src.InfinityModifier.String(), nil
	}
	return src.Time, nil
}

// MarshalJSON implements the [encoding/json.Marshaler] interface.
func (src Date) MarshalJSON() ([]byte, error) {
	if !src.Valid {
		return []byte("null"), nil

View on GitHub (pinned to ec1a0befd2)

When it happens

Trigger: Thrown at pgtype/date.go:58 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/93f7e66f4bd064db.json. Report an issue: GitHub.