If I wanted to get all values for an item, including its labels, how would that be done in the above case?
Also can you make a UDT a clustered key? On Sun, Nov 13, 2016 at 4:33 AM, Manoj Khangaonkar <khangaon...@gmail.com> wrote: > Hi, > > Instead of using a collection, consider making label a clustered column. > > With this each request will essentially append a column (label) to the > partition. > > To get all labels would be a simple query > > select label from table where partitionkey = "value". > > In general , read + update of a column is an anti pattern in cassandra - > which is what you are doing. What I suggesting > above is appending more columns and not updating existing columns. > > regards > > regards > > On Sat, Nov 12, 2016 at 2:34 AM, Ali Akhtar <ali.rac...@gmail.com> wrote: > >> I have a table where each record contains a list<string> of labels. >> >> I have an endpoint which responds to new labels being added to a record >> by the user. >> >> Consider the following scenario: >> >> - Record X, labels = [] >> - User selects 2 labels, clicks a button, and 2 http requests are >> generated. >> - The server receives request for Label 1 and Label 2 at the same time. >> - Both requests see the labels as empty, add 1 label to the collection, >> and send it. >> - Record state as label 1 request sees it: [1], as label 2 sees it: [2] >> >> How will the above conflict be resolved? What can I do so I end up with >> [1, 2] instead of either [1] or [2] after both requests have been processed? >> > > > > -- > http://khangaonkar.blogspot.com/ >
