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

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

Vladimir Sitnikov created CALCITE-2477:
------------------------------------------

             Summary: 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


{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}}, ...)



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)