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https://issues.apache.org/jira/browse/CALCITE-2786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hongze Zhang updated CALCITE-2786:
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Description:
Both Oracle[1] and SQL:2016[2] supports or introduces an optional order by
clause in JSON_ARRAYAGG, the feature can be implemented since Calcite already
supports sorted aggregation.
AFAICS, JSON_ARRAYAGG's order by clause has no difference with the definition
of WITHIN GROUP's, so I think it might be feasible to do sort by expanding
JSON_ARRAYAGG(... ORDER BY ...) to JSON_ARRAYAGG(...) WITHIN GROUP (ORDER
BY...) during SQL parsing.
> Add order by clause support for JSON_ARRAYAGG
> ---------------------------------------------
>
> Key: CALCITE-2786
> URL: https://issues.apache.org/jira/browse/CALCITE-2786
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Hongze Zhang
> Assignee: Hongze Zhang
> Priority: Major
>
> Both Oracle[1] and SQL:2016[2] supports or introduces an optional order by
> clause in JSON_ARRAYAGG, the feature can be implemented since Calcite already
> supports sorted aggregation.
> AFAICS, JSON_ARRAYAGG's order by clause has no difference with the definition
> of WITHIN GROUP's, so I think it might be feasible to do sort by expanding
> JSON_ARRAYAGG(... ORDER BY ...) to JSON_ARRAYAGG(...) WITHIN GROUP (ORDER
> BY...) during SQL parsing.
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