[jira] [Resolved] (CALCITE-2477) SqlAdvisor: scalar sub-query support

["Vladimir Sitnikov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-2477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Sitnikov resolved CALCITE-2477.
----------------------------------------
       Resolution: Fixed
    Fix Version/s: 1.18.0

Fixed in https://git-wip-us.apache.org/repos/asf?p=calcite.git;a=commit;h=9f6c067256dde19d1b43b4ee978ce443e73797a4

> SqlAdvisor: scalar sub-query support
> ------------------------------------
>
>                 Key: CALCITE-2477
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2477
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.17.0
>            Reporter: Vladimir Sitnikov
>            Assignee: Vladimir Sitnikov
>            Priority: Major
>             Fix For: 1.18.0
>
>
> {code:sql}select ax^ from (select (select * from dummy) axc from dummy a){code}
> After simplify:
> {code:sql}SELECT ax _suggest_ FROM ( SELECT ( SELECT * FROM dummy ) axc FROM dummy a ) ){code}
> Note the extra closing brace.
> TL;DR: {{consumeQuery}} assumes {{axc FROM dummy...}} is a "union-kind of" continuation of a query started in {{select *...}}.
> The solution is keep advancing in {{consumeQuery}} only if known tokens are ahead (e.g. {{union}}, {{intersect}}, ...)



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