[jira] [Commented] (IGNITE-18203) Redesign table/index creation to avoid dependency cycles

["Vladislav Pyatkov (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-18203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17701587#comment-17701587 ] 

Vladislav Pyatkov commented on IGNITE-18203:
--------------------------------------------

LGTM

> Redesign table/index creation to avoid dependency cycles
> --------------------------------------------------------
>
>                 Key: IGNITE-18203
>                 URL: https://issues.apache.org/jira/browse/IGNITE-18203
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Roman Puchkovskiy
>            Assignee: Alexander Lapin
>            Priority: Blocker
>              Labels: ignite-3
>             Fix For: 3.0.0-beta2
>
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> Currently, index depends on a table, while table depends on RAFT groups start, which may need to apply commands (including inserts), and inserts depend on indices of the table. There is a dependency cycle. This is just one example of such a cycle in the current design.
> One idea is to split 'Table' entity into 2: 'Table Structure' and 'Full Table'. Table structure would only comprise objects representing bare table information (no indices), something like current {{{}TableImpl{}}}/{{{}InternalTable{}}}. Then, the following dependencies could be created:
>  # Table Structure depends on Configuration
>  # Index depends on Configuration and Table Structure
>  # Sql Schema depends on Table Structure and Index
>  # Full Table depends on Table Structure, Index, Sql Schema
> This requires a redesign of how {{{}TableManager{}}}, {{{}IndexManager{}}}, {{SqlSchemaManager}} interact, probably {{TableManager}} needs to be broken in 2.



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