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https://issues.apache.org/jira/browse/CALCITE-7331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18045062#comment-18045062
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Julian Hyde commented on CALCITE-7331:
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Can EXCLUDE repeat, and can it be used in a query that has non-star
expressions? I think some of the DBs allow "select 1 as x, emp.* EXCLUDE(a),
dept.* EXCLUDE (b, c), 2 as z from ..."
If it can be used in a query with non-star expressions, then "select 1 as x, 2
as y except ((select 1 as x, 2 as y) except (select 2 as x, 3 as y))" requires
unbounded lookahead for the parser to figure out which kind of 'except' it is
looking at.
> Support the alias form SELECT * EXCEPT() for SELECT * EXCLUDE()
> ---------------------------------------------------------------
>
> Key: CALCITE-7331
> URL: https://issues.apache.org/jira/browse/CALCITE-7331
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.41.0
> Reporter: Zhen Chen
> Assignee: Zhen Chen
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.42.0
>
>
> Based on the CALCITE-7310 implementation, this Jira primarily serves as an
> alias extension. For example:
> SELECT * EXCLUDE(deptno, empno) FROM emp;
> Similarly, it can be written as:
> SELECT * EXCEPT(deptno, empno) FROM emp;
> Similar to the implementation in ClickHouse[1], but the expr in <expr>
> EXCEPT(col1, col2) only supports *.
> [1]
> [https://clickhouse.com/docs/zh/sql-reference/statements/select/except-modifier]
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