Posted by
Liang Chen-2 on
May 26, 2017; 3:50pm
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/when-plan-to-implemnt-merge-operation-tp13228p13264.html
Hi
1. Can you give a specific example, let us first understand your
requirement exactly. Like below, to provide some fact data.
ID date name age
1 2017-05-1 carbon 21
2 2017-05-23 spark 30
......
2. I would like to kindly invite your team guys to participate in
contributing this feature if it is confirmed by dev community.
Regards
Liang
2017-05-26 12:47 GMT+08:00
[hidden email] <
[hidden email]>:
> hello，
> my team is trying to implement merge operation,
> merge scenario like the following:
> compare records in two tables(same structure,different amout
> of records)and modify big one ,
> 1. if small.id=big.id and small.date<big.data then update
> bigtable,
> 2. if small.id not in big then insert bigtable.
> our solution to this scenario is:
> 1. append the smalltable into bigtable
> 2. delete records from bigtable which have have the same id
> and leave the one which have the biggest date in bigtable in the back
> concurrently.
> My question is if Apache Carbon Community has plan to implement similar
> operation?
>
>
>
>
[hidden email]
>