It is not possible. Internally Cassandra flattens your data out into a set of key-value-pairs. All collection types, including lists, are nothing more than a thin layer of schema over a clustered set of key-value-pairs, so on disk there is no difference between an empty list and a list that doesn't exist. If you need to differentiate between the two, you will need a separate "isSet" column that is a 1 or a 0 to indicate the presence or absence of a list and write your client-side code to branch on that new column instead.
Thanks, Cody On Tue, Nov 29, 2016 at 6:47 AM, Selvam Raman <sel...@gmail.com> wrote: > Filed Type in cassandra : List<Text> > > I am trying to insert Collections.emptyList() from spark to cassandra > list<Text> field. In cassandra it stores as null object. > > How can i avoid null values here. > > -- > Selvam Raman > "லஞ்சம் தவிர்த்து நெஞ்சம் நிமிர்த்து" >
