This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.
ingres_field_precision() returns the precision of a field. This value is used only for decimal, float and money SQL data types. 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().
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