Return a list of index operation tuples to lift values in a table.

        Valid index operations include:
            ('eq', <indx>)
            ('pref', <indx>)
            ('range', (<minindx>, <maxindx>))

def getIndxOps(self, valu, cmpr='='):
        '''
        Return a list of index operation tuples to lift values in a table.

        Valid index operations include:
            ('eq', <indx>)
            ('pref', <indx>)
            ('range', (<minindx>, <maxindx>))
        '''
        func = self.indxcmpr.get(cmpr)

        if func is None:
            raise s_exc.NoSuchCmpr(name=self.name, cmpr=cmpr)

        return func(valu)