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https://issues.apache.org/jira/browse/IGNITE-15483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Evgeny Stanilovsky updated IGNITE-15483:
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Fix Version/s: 3.2
(was: 3.1)
> Unique index detection.
> -----------------------
>
> Key: IGNITE-15483
> URL: https://issues.apache.org/jira/browse/IGNITE-15483
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Andrey Mashenkov
> Priority: Major
> Labels: ignite-3
> Fix For: 3.2
>
>
> Uniq index constraint support is very limited due to performance issues in
> the general case.
> Uniq index must contain all affinity columns, in this case, uniqueness
> achieves out of the box and costs nothing.
> Uniq flag is very useful in query planning, as we may rely on the fact the
> unique index lookup will always return a single row.
> Maybe, it is not a good idea to allow users to configure index "uniq" flag
> manually. (this is discussable)
> But we can detect unique index and set the flag automatically.
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