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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2019/12/06 02:21:33 UTC
[GitHub] [incubator-druid] jon-wei commented on issue #8966: Issue while
updating the data in Datasource
jon-wei commented on issue #8966: Issue while updating the data in Datasource
URL: https://github.com/apache/incubator-druid/issues/8966#issuecomment-562403965
> My doubt is, In step 3 the count of the tiger is getting decreased by 1 but I think it should not be changed since there are no changes in step 3 for tiger and there is no number change also
Between step 2 and 3, the datasource only has 1 "tiger" row.
If you reingest that datasource with a "count" aggregator, the "count" aggregator will only see 1 row, hence "tiger" with "count=1" in step 3.
If you want to preserve the counts during reingestion, you'll want to use a longSum aggregator on the "count" column instead
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