[CALCITE-5696] Support trailing comma in SELECT list for Babel parser(like BigQuery)

[xuzifu666]

jira: https://issues.apache.org/jira/browse/CALCITE-5696

[mihaibudiu]

If we support trailing commas in select, we should support them in create table too.
but maybe that's a separate issue.

[xuzifu666]

If we support trailing commas in select, we should support them in create table too. but maybe that's a separate issue.

That makes sense; I’ve already added support for CREATE TABLE in a recent commit. @mihaibudiu

[xiedeyantu]

As I recall, ClickHouse also supports this feature; it looks good now, so I think you can go ahead.

[xuzifu666]

@mihaibudiu Are you happy with current changes? PTAL when you have a time, very thanks!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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