code: func (idx *Index) SetColumnAttrs(colIDOrKey interface{}, attrs map[string]interface{}) *PQLBaseQuery {
  	colStr, err := formatIDKey(colIDOrKey)
  	if err != nil {
  		return NewPQLBaseQuery("", idx, err)
  	}
  	attrsString, err := createAttributesString(attrs)
  	if err != nil {
  		return NewPQLBaseQuery("", idx, err)
  	}
  	q := fmt.Sprintf("SetColumnAttrs(%s,%s)", colStr, attrsString)
  	return NewPQLBaseQuery(q, idx, nil)
  }
docs: // SetColumnAttrs creates a SetColumnAttrs query.
  // SetColumnAttrs associates arbitrary key/value pairs with a column in an index.
  // Following types are accepted: integer, float, string and boolean types.