[jira] [Commented] (IGNITE-13670) Skip writing null-map and varlen table when possible.

["Taras Ledkov (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-13670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17340311#comment-17340311 ] 

Taras Ledkov commented on IGNITE-13670:
---------------------------------------

[~amashenkov], the patch is OK with me.

> Skip writing null-map and varlen table when possible.
> -----------------------------------------------------
>
>                 Key: IGNITE-13670
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13670
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Alexey Goncharuk
>            Assignee: Andrey Mashenkov
>            Priority: Major
>              Labels: iep-54, ignite-3, newbie
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> h3. Motivation.
> The nullmap is currently always written to the tuple layout for all columns 
> even if there are no nullable columns described in the schema.
> The same is true and can be done for varlen table.
> Seems, we can extend this idea to every single tuple and still have the ability to compare key/value content fast as byte arrays.
> Apparently, this will work for rows of same schema version, but we shouldn't bother about the schema version,
> because anyway, old row will be upgraded to the newer version before comparison according to the live-schema concept.
> h3. Description.
> Let's skip an empty nullmap and write just a flag instead.
> Let's skip an empty varlen table and write just a flag instead.



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