code: func (p *PhysicalProperty) AllColsFromSchema(schema *expression.Schema) bool {
  	for _, col := range p.Items {
  		if schema.ColumnIndex(col.Col) == -1 {
  			return false
  		}
  	}
  	return true
  }
docs: // AllColsFromSchema checks whether all the columns needed by this physical
  // property can be found in the given schema.