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https://issues.apache.org/jira/browse/CALCITE-6230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17811192#comment-17811192
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Alessandro Solimando commented on CALCITE-6230:
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[~hongyuguo], what's the purpose of this ticket?

If multiple tickets can be grouped into a single coherent topic (probably more 
fine-grained than the labels you used), you can make an umbrella ticket and 
have them as sub-tickets.

In general any Jira ticket ideally ends up in our release notes describing an 
improvement or bug-fix, but I don't see how this ticket can fit into this model.

> Jira case collections
> ---------------------
>
>                 Key: CALCITE-6230
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6230
>             Project: Calcite
>          Issue Type: Task
>            Reporter: hongyu guo
>            Priority: Minor
>
> syntax:
> CALCITE-5852: MERGE INTO
> CALCITE-5301: AT TIME ZONE
> CALCITE-5386: LIKE (ANY | SOME | ALL)
> CALCITE-5216: Cannot parse parenthesized nested WITH clause
> CALCITE-5205: Supports hint option as string and numeric literal
> CALCITE-5168: Allow AS after parenthesized JOIN
> CALCITE-5084: Support ROWS syntax with TABLESAMPLE
> CALCITE-5066: Support variables with “@" and “@@" prefixes (like MySQL)
> CALCITE-4705: Support hints like /*+ skewjoin(a(c0, c1)) */
> CALCITE-4455: Babel parser support Spark INSERT OVERWRITE TABLE/DIRECTORY 
> statement
> CALCITE-3970: Table-valued function TUMBLE uses non-standard syntax
> CALCITE-5681: Support authorization via GRANT and REVOKE DDL commands
> data type:
> CALCITE-5346: type aliases
> CALCITE-4918: Add a VARIANT data type
> rule and optimization:
> CALCITE-4843: optimize ALL,SOME sub-query list when op is the <, <=,> or >=
> CALCITE-4052: Enable Top-down Optimization
> dialect:
> CALCITE-4782: Allow 'CAST(numeric AS BOOLEAN)' (if enabled by conformance)
> function:
> CALCITE-5809: enable already available functions in Apache Spark Library
> CALCITE-5087: Support bitwise operators
> CALCITE-4521: Support User Defined Table-valued Function
> CALCITE-4484: Add UNIQUE_VALUE(x) aggregate function, that throws if x is not 
> unique
> CALCITE-3683: Enhanced MATH Function
> CALCITE-3646: MySQL compression functions
> CALCITE-2031: Implement more OpenGIS functions
> CALCITE-2871: Implement JSON_TABLE table function



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