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https://issues.apache.org/jira/browse/CARBONDATA-440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liang Chen resolved CARBONDATA-440.
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Resolution: Fixed
> Provide Update/Delete functionality support in CarbonData
> ---------------------------------------------------------
>
> Key: CARBONDATA-440
> URL: https://issues.apache.org/jira/browse/CARBONDATA-440
> Project: CarbonData
> Issue Type: New Feature
> Components: core, data-query, file-format, spark-integration, sql
> Affects Versions: 0.1.1-incubating
> Reporter: Aniket Adnaik
> Assignee: Aniket Adnaik
> Fix For: 1.0.0-incubating
>
> Attachments: ApacheCarbonData_UpdateDelete_Support_jira440.pdf
>
> Time Spent: 13h
> Remaining Estimate: 0h
>
> Currently, CarbonData does not support modification of existing rows in the
> table. This is a major limitation for many real world desirable use cases in
> data warehousing, such as slow changing dimension tables, data correction of
> fact tables or data cleanup, etc. Many users want to be able to update and
> delete rows from the CarbonData table.
> Following are some high level design goals to support this functionality,
> 1. Provide a standard SQL interface to perform Update and Delete operations.
> 2. Perform Update and Delete operations on CarbonData table without having to
> rewrite the entire CarbonData block (file) by making use of differential
> files (a.k.a delta files).
> 3. After Update or Delete operation, CarbonData readers should skip deleted
> records and read updated records seamlessly without having to modify user
> applications.
> 4. Perform compaction of Update and Delete delta files to maintain adequate
> query performance
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