[jira] [Assigned] (IGNITE-19407) Sql. Introduce DDL command for ALTER COLUMN TYPE.

["Pavel Pereslegin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-19407?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pavel Pereslegin reassigned IGNITE-19407:
-----------------------------------------

    Assignee: Pavel Pereslegin

> Sql. Introduce DDL command for ALTER COLUMN TYPE.
> -------------------------------------------------
>
>                 Key: IGNITE-19407
>                 URL: https://issues.apache.org/jira/browse/IGNITE-19407
>             Project: Ignite
>          Issue Type: Improvement
>          Components: sql
>            Reporter: Andrey Mashenkov
>            Assignee: Pavel Pereslegin
>            Priority: Major
>              Labels: ignite-3
>
> Introduce DDL command class.
> Implement command validation logic. 
> Pass command to the CatalogService via DdlHandler.
> Validator should allow changing column DEFAULT and changing column type for the next cases
> {noformat}
>   INT8 -> INT16 -> INT32 -> INT64
>   FLOAT -> DOUBLE
>   DECIMAL(10,5) -> DECIMAL(15, 5) // increasing precision only
>   VARCHAR(10) -> VARCHAR(20)
>   VARBINARY(10) -> VARBINARY(20)
>    NOT NULL -> NULLABLE
> {noformat}



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