A Metamorph counter index contains the same information that a
compact Metamorph index has, but also includes additional information
which improves the performance of LIKEIN
queries. If you are
doing LIKEIN
queries then you should create this type of index,
otherwise you should use either the normal or inverted forms of the
Metamorph index. A Metamorph counter index is created with CREATE METAMORPH COUNTER INDEX; in Texis version 7 and later the COUNTS 'on' index option (here) can be given
instead of the COUNTER
flag to accomplish the same action.