This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change in a future release of PHP without notice. Be warned and use this function at your own risk.
ingres_field_scale() returns the scale of a field. This value is used only for the decimal SQL data type. For detailed information, see the Ingres/OpenAPI User Guide - Appendix C.
index is the number of the field and must be between 1 and the value given by ingres_num_fields().