Vladimir Sitnikov created CALCITE-2477:
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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}}, ...)
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