Cassandra does not differentiate between null and empty, so when reading from C* all empty values are reported as null. To avoid inserting nulls (avoiding tombstones) see
https://github.com/datastax/spark-cassandra-connector/blob/master/doc/5_saving.md#globally-treating-all-nulls-as-unset This will not prevent those columns from being read as null though, it will only skip writing tombstones. On Thu, Aug 25, 2016, 1:23 PM Selvam Raman <sel...@gmail.com> wrote: > Hi , > > Dataframe: > colA colB colC colD colE > 1 2 3 4 5 > 1 2 3 null null > 1 null null null 5 > null null 3 4 5 > > I want to insert dataframe to nosql database, where null occupies > values(Cassandra). so i have to insert the column which has non-null values > in the row. > > Expected: > > Record 1: (1,2,3,4,5) > Record 2:(1,2,3) > Record 3:(1,5) > Record 4:(3,4,5) > > -- > Selvam Raman > "லஞ்சம் தவிர்த்து நெஞ்சம் நிமிர்த்து" >
