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From "Liang Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CARBONDATA-1516) Support pre-aggregate tables and timeseries in carbondata
Date Sun, 15 Oct 2017 06:49:02 GMT

    [ https://issues.apache.org/jira/browse/CARBONDATA-1516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16205048#comment-16205048
] 

Liang Chen commented on CARBONDATA-1516:
----------------------------------------

 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.

> Support pre-aggregate tables and timeseries in carbondata
> ---------------------------------------------------------
>
>                 Key: CARBONDATA-1516
>                 URL: https://issues.apache.org/jira/browse/CARBONDATA-1516
>             Project: CarbonData
>          Issue Type: New Feature
>            Reporter: Ravindra Pesala
>         Attachments: CarbonData Pre-aggregation Table.pdf
>
>
> Currently Carbondata has standard SQL capability on distributed data sets.Carbondata
should support pre-aggregating tables for timeseries and improve query performance.



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