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https://issues.apache.org/jira/browse/IGNITE-14557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrey Mashenkov updated IGNITE-14557:
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Labels: iep-54 ignite-3 (was: )
> Improve row layout.
> -------------------
>
> Key: IGNITE-14557
> URL: https://issues.apache.org/jira/browse/IGNITE-14557
> Project: Ignite
> Issue Type: Improvement
> Reporter: Andrey Mashenkov
> Priority: Major
> Labels: iep-54, ignite-3
>
> h3. Motivation.
> When one try to read a column value from a row, the very first check will be
> a null-check.
> As Null-Table resides right after an Offset-Table, the we need 2 jumps to for
> the null-check.
> h3. Description.
> Assuming, Null-Table reserves a bit for each columns even if the columns is
> not Nullable,
> Null-table has constant size (within same version of schema) and we no need
> extra bytes to persist it's length into the tuple.
> * Null-checks will not require extra read for Offset-Table size and extra
> jump.
> * Offset-Table will not need extra read/jump to reach as Null-Table size is
> constant.
> Let's just swap these tables in layout and fix docs README.md and IEP.
>
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