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https://issues.apache.org/jira/browse/IGNITE-22197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Iurii Gerzhedovich resolved IGNITE-22197.
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Resolution: Fixed
> Move DDL 'IF EXISTS` flag handling inside the catalog command
> -------------------------------------------------------------
>
> Key: IGNITE-22197
> URL: https://issues.apache.org/jira/browse/IGNITE-22197
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Pavel Pereslegin
> Assignee: Iurii Gerzhedovich
> Priority: Major
> Labels: ignite-3
>
> Currently, the catalog command itself does not handle the 'IF EXISTS' 'IF NOT
> EXISTS' flags. We handle the exception thrown by the command and set the
> result to false if the flag was set. And this result (true/false) can be
> obtained by the user using {{AsyncResultSet#wasApplied}} method.
> With the current approach, a problem may arise when processing a batch
> command.
> For example
> {code:sql}
> CREATE TABLE IF NOT EXISTS Person... -- command 1
> CREATE TABLE IF NOT EXISTS City... -- command 2
> {code}
> If the Person table exists, the batch will not be fully executed.
> To address this we can move flag handling inside the command itself.
> To keep "wasApplied" working, we can rework a bit {{CatalogManager#execute}}
> so that it returns not only the catalog version, but also a flag indicating
> that something was changed when this command was executed.
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