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Re: PR Review Request

[Martijn Visser]

Hi everyone,

I would like to follow-up on this email that was sent by Jing. So far, no 
progress has been made, despite reaching out to the mailing list, the original 
Jira ticket and reaching out to people directly. Is there a way that we can 
move this PR/topic forward? 

For context, in Apache Flink we're currently heavily using Calcite. However, we 
are now at the stage where Calcite is actually holding us back. It would be 
great if we can find a way to strengthen our bond and move both Calcite and 
Flink forward. 

Looking forward to your thoughts,

Martijn

On 2022/01/26 07:05:37 Jing Zhang wrote:
> Hi community,
> My apologies for interrupting.
> Anyone could help to review the pr
> https://github.com/apache/calcite/pull/2606?
> Thanks a lot.
> 
> CALCITE-4865 is the first sub-task of CALCITE-4864. This Jira aims to
> extend existing Table function in order to support Polymorphic Table
> Function which is introduced as the part of ANSI SQL 2016.
> 
> The brief change logs of the PR are:
>   - Update `Parser.jj` to support partition by clause and order by clause
> for input table with set semantics of PTF
>   - Introduce `TableCharacteristics` which contains three characteristics
> of input table of table function
>   - Update `SqlTableFunction` to add a method `tableCharacteristics`,  the
> method returns the table characteristics for the ordinal-th argument to
> this table function. Default return value is Optional.empty which means the
> ordinal-th argument is not table.
>   - Introduce `SqlSetSemanticsTable` which represents input table with set
> semantics of Table Function, its `SqlKind` is `SET_SEMANTICS_TABLE`
>   - Updates `SqlValidatorImpl` to validate only set semantic table of Table
> Function could have partition by and order by clause
>   - Update `SqlToRelConverter#substituteSubQuery` to parse subQuery which
> represents set semantics table.
> 
> PR: https://github.com/apache/calcite/pull/2606
> JIRA: https://issues.apache.org/jira/browse/CALCITE-4865
> Parent JARA: https://issues.apache.org/jira/browse/CALCITE-4864
> 
> Best,
> Jing Zhang
>