Method Scan

rows.go:235–290

(dest ...any)

}

func (rows *baseRows) Scan(dest ...any) error {
	m := rows.typeMap
	fieldDescriptions := rows.FieldDescriptions()
	values := rows.values

	if len(fieldDescriptions) != len(values) {
		err := fmt.Errorf("number of field descriptions must equal number of values, got %d and %d", len(fieldDescriptions), len(values))
		rows.fatal(err)
		return err
	}

	if len(dest) == 1 {
		if rc, ok := dest[0].(RowScanner); ok {
			err := rc.ScanRow(rows)
			if err != nil {
				rows.fatal(err)
			}
			return err
		}
	}

	if len(fieldDescriptions) != len(dest) {
		err := fmt.Errorf("number of field descriptions must equal number of destinations, got %d and %d", len(fieldDescriptions), len(dest))
		rows.fatal(err)
		return err
	}

	if rows.scanPlans == nil {
		rows.scanPlans = make([]pgtype.ScanPlan, len(values))
		rows.scanTypes = make([]reflect.Type, len(values))
		for i := range dest {
			rows.scanPlans[i] = m.PlanScan(fieldDescriptions[i].DataTypeOID, fieldDescriptions[i].Format, dest[i])
			rows.scanTypes[i] = reflect.TypeOf(dest[i])
		}
	}

	for i, dst := range dest {
		if dst == nil {
			continue
		}

		if rows.scanTypes[i] != reflect.TypeOf(dst) {
			rows.scanPlans[i] = m.PlanScan(fieldDescriptions[i].DataTypeOID, fieldDescriptions[i].Format, dest[i])
			rows.scanTypes[i] = reflect.TypeOf(dest[i])
		}

		err := rows.scanPlans[i].Scan(values[i], dst)
		if err != nil {
			err = ScanArgError{ColumnIndex: i, FieldName: fieldDescriptions[i].Name, Err: err}
			rows.fatal(err)
			return err
		}
	}

	return nil
}

func (rows *baseRows) Values() ([]any, error) {