yuanlihan commented on pull request #9883:
URL: https://github.com/apache/druid/pull/9883#issuecomment-645829640
> But, I believe other fields such as shardSpec, dimensions, and metrics are
still useful. What do you think about adding them instead of payload?
Hi @jihoonson
I agree that these fields should be useful in some use cases. But I still
have some concerns about performance of serializing these fields. Can we add
fields when they are needed?
Note that currently almost all sql queries that scan the `sys.segment` table
have a sorting clause. And if there are a large number of segments(more than 1
million segments in my case), it will be really slow to load the `Segments`
page of the console. And the frontend page already uses the point query API
`/druid/coordinator/v1/datasources/{dataSourceName}/segments/{segmentId}` to
get the `payload`.
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