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https://issues.apache.org/jira/browse/FLINK-22998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17363588#comment-17363588
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Ingo Bürk commented on FLINK-22998:
-----------------------------------
The ExtendedParser (partially) exists because it parses things that don't yet
work with the Calcite parser. We recently started migrating one of those
things. It's not as easy as just removing the ExtendedParser, unfortunately. I
just wanted to point out that these are all the little issues we'll get by
"hand-parsing" SQL.
> Flink SQL does not support block comment before SET command
> -----------------------------------------------------------
>
> Key: FLINK-22998
> URL: https://issues.apache.org/jira/browse/FLINK-22998
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.14.0
> Reporter: Zhiwen Sun
> Priority: Major
>
> Flink SQL does not support block comment before SET command.
> A tiny SQL that produces the bug:
>
> {code:java}
> /**
> comment
> **/
> SET sql-client.execution.result-mode=TABLEAU;
> SELECT 'hello';{code}
>
> while following SQL works fine:
>
> {code:java}
> SET sql-client.execution.result-mode=TABLEAU;
> /**
> comment
> **/
> SELECT 'hello';{code}
>
>
> After I debug Flink source code, I found that EXTENDED_PARSER does not
> support block comment.
>
>
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