[jira] [Updated] (IGNITE-19229) Schema validation during tx processing: validators

["Roman Puchkovskiy (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-19229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Roman Puchkovskiy updated IGNITE-19229:
---------------------------------------
    Epic Link: IGNITE-20800  (was: IGNITE-18733)

> Schema validation during tx processing: validators
> --------------------------------------------------
>
>                 Key: IGNITE-19229
>                 URL: https://issues.apache.org/jira/browse/IGNITE-19229
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Roman Puchkovskiy
>            Priority: Major
>              Labels: iep-110, ignite-3
>
> As per https://cwiki.apache.org/confluence/display/IGNITE/IEP-110%3A+Schema+synchronization%3A+basic+schema+changes , the following schema changes are forward-compatible:
> # Creating a table
> # Adding a nullable column or a column having a default value
> # Renaming a column
> # Dropping a constraint (including NOT NULL constraint)
> # Changing a column type when any value in the old type has an exact representation in the new type
> Other schema changes are not compatible.
> The supported type changes follow:
> * Widening conversions between integral types (like int->long)
> * Widening conversions between floating-point types (float->double)
> * Widening conversions between date-time types (increasing precision)
> * Widening conversions between decimal types (increasing precision)
> * Increasing allowed length of VARCHAR
> * Increasing allowed length of VARBINARY
> * Conversions of anything to VARCHAR with enough capacity



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