Yeah, I am using set<label> (not set<text> though) On Sun, Nov 13, 2016 at 5:36 PM, DuyHai Doan <doanduy...@gmail.com> wrote:
> Yes you'd have to know the UDT values since it's part of the primary key > to query your data. > > If I were you I would stick to using a set<text> and use UPDATE my_table > SET labels = labels + <new_label>; > > It does work well with concurrent updates. > > On Sun, Nov 13, 2016 at 1:32 PM, Ali Akhtar <ali.rac...@gmail.com> wrote: > >> But then how would you query it? You'd need to know all the values of the >> udt, right? >> >> On Sun, Nov 13, 2016 at 5:30 PM, DuyHai Doan <doanduy...@gmail.com> >> wrote: >> >>> "Also can you make a UDT a clustered key?" --> yes if it's frozen >>> >>> On Sun, Nov 13, 2016 at 1:25 PM, Ali Akhtar <ali.rac...@gmail.com> >>> wrote: >>> >>>> 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/ >>>>> >>>> >>>> >>> >> >
