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

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 <> wrote:
Hi ,

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.


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"