kangpinghuang opened a new issue #2590: [segment v2] [optimization] create index without modifying the segment files URL: https://github.com/apache/incubator-doris/issues/2590 **Is your feature request related to a problem? Please describe.** Now, if we use alter table to add index or drop, we should read all tablet data up and write all data with indexes into disk, which will be very io costly. Here we can incur a optimization that if we add index for tablet, we can just read column data and write the index to an independent file; if we drop the index, we can just mark a delete flag for index and the index can be really delete when compaction.
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