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https://issues.apache.org/jira/browse/IGNITE-5949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16305545#comment-16305545
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ASF GitHub Bot commented on IGNITE-5949:
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Github user asfgit closed the pull request at:
https://github.com/apache/ignite/pull/3258
> DDL: Support ALTER TABLE DROP COLUMN
> ------------------------------------
>
> Key: IGNITE-5949
> URL: https://issues.apache.org/jira/browse/IGNITE-5949
> Project: Ignite
> Issue Type: New Feature
> Components: sql
> Reporter: Andrew Mashenkov
> Assignee: Sergey Kalashnikov
> Labels: important
> Fix For: 2.4
>
>
> Ignite should support {{DROP COLUMN}} operation for {{ALTER TABLE}} command.
> Design considerations:
> 1) Drop should only be possible on binary types without schema (see
> IGNITE-6611). Probably we will need a new option for {{CREATE TABLE}} command
> 2) Drop should not block other operations for a long time. We should
> synchronously block the table, change meta, then release the lock and let
> operations continue.
> 3) Actual data remove should be performed asynchronously in the same way we
> create index. During this time we should not allow any other modifications to
> the table
> 4) Be careful with node stop - we do not want to wait for years for this
> command to complete.
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