<a class="xref" href="sql-createopclass.html" title="CREATE OPERATOR CLASS"><span class="refentrytitle">CREATE OPERATOR CLASS</span></a>.)
   <span class="productname">PostgreSQL</span> will allow loose members of a
   family to be dropped from the family at any time, but members of an
   operator class cannot be dropped without dropping the whole class and
   any indexes that depend on it.
   Typically, single-data-type operators
   and functions are part of operator classes because they are needed to
   s