Hi Liang, For alter table, data update/delete, and delete segment, they are the same. So I write in document “ User can manually perform this operation and rebuild pre-aggregate table as update scenario” User need to drop the associated aggregate table and perform alter table, or data update/delete, or delete segment operation, then he can create the pre-agg table using CTAS command again, and the pre-aggregate table will be rebuilt.
Regards, Jacky > 在 2017年10月15日，下午2:50，Liang Chen <[email protected]> 写道： > > Hi Jacky > > Thanks for you started this discussion, this is a great feature in > carbondata. > > One question: > For sub_jar "Handle alter table scenarios for aggregation table", please > give more detail info. > Just i viewed the pdf attachment as below, looks no need to do any handles > for agg table if users do alter for main table. so can you provide more > detail, which scenarios need to be handled? > ------------------------------------------------------------------------------------------ > Adding of new column will not impact agg table. > Deleting or renaming existing column may invalidate agg tables, if it > invalidate, the operation > will be rejected. > User can manually perform this operation and rebuild pre-aggregate table as > update > scenario. > > Regards > Liang > > > -- > Sent from: > http://apache-carbondata-dev-mailing-list-archive.1130556.n5.nabble.com/
