Database Reference
In-Depth Information
Figure 2-8
shows that ritaf has been added as a follower of jhas-
sell.
Figure 2-8
.
Update works as an insert for map of followers for nonexisting row key (e.g.,
twitter_id)
7.
To delete an element from the map we need to execute, use this com-
mand:
delete followers['guestuser'] from users
where twitter_id='imvivek';
You can see that the list of followers for
imvivek
is reduced to
four followers after deletion (see
Figure 2-9
).
Figure 2-9
.
After deleting guestuser as a follower for imvivek
With that said, we can add a dynamic column as a key-value pair
using collection support.
Dynamic Columns via cqlsh Using Set Support
