Default behavior of generating index_name for columns might need to be improved.

I have a few column families, each has a column called user_name. I tried to use secondary index on user_name column for each of the column family. However, when creating these column families, cassandra keeps reporting "Duplicate index name..." exception. I finally figured out that it seems the default index name is "column name"+"_idx", this make my column family violate the "uniqueness of index name" rule.

I was wondering if the default index_name generating rule could be like "column name"+"cf name", so the index name would not collide with each other that easily, if the user do not assign "index_name" when creating a column family.