better365
No user record in our sample, but better365 has activity below (stories or comments). Likely we have partial data — the full bulk-load will fill profiles in.
No user record in our sample, but better365 has activity below (stories or comments). Likely we have partial data — the full bulk-load will fill profiles in.
That's fair. Actually, Last is usually called last_k(n), so that you can specify the number of the values in the result array. For example, if the input column is page_view_id and n = 300, it will return the last 300…
We utilize a lambda architecture, which incorporates the concept of precomputed tables as well. Those precomputed tables store intermediate representation of the final results. These precomputed tables are capable of…
True. But it is not necessary to reinvent the wheel for engineers. :)
For offline computation, it is okay with the table with 5bn rows. But for online serving, it would be really challenging to serve the features at a few milliseconds. But even for offline computation, for the same…
For correctness, yes, it works as well as the SQL version. And the aggregation can be extensible for other operations easily. For example, we have an operation of last, which is not even available in standard SQL.