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https://issues.apache.org/jira/browse/IGNITE-6054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ozerov reassigned IGNITE-6054:
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Assignee: Alexander Paschenko (was: Vladimir Ozerov)
> SQL: Add option to store primitive keys in plain form for CREATE TABLE
> ----------------------------------------------------------------------
>
> Key: IGNITE-6054
> URL: https://issues.apache.org/jira/browse/IGNITE-6054
> Project: Ignite
> Issue Type: Task
> Components: sql
> Affects Versions: 2.1
> Reporter: Vladimir Ozerov
> Assignee: Alexander Paschenko
> Labels: performance
> Fix For: 2.3
>
>
> Currently we create separate internal type for primary key columns. This is
> necessary to avoid clashes between keys of the same type within the same
> caches (ironically, we do not allow multiple dynamic tables per cache).
> The most widely used PK is single-column key of {{Long}} or {{String}} data
> type. If we store a key plain {{long}}, it will consume 9 bytes. If we store
> it as an object with long field, it will consume 24 + 9 = 33 bytes. What is
> worse, in the latter case we will have to copy key object back and forth
> between page memory and application code many times, while for plain long key
> we simply do {{Unsafe.getLong}}.
> For this reason, it makes sense to introduce special mode for {{CREATE
> TABLE}} command, when key will not be wrapped into a class, and will be
> stored as is. Let's name it {{plainPrimaryKey}}.
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