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https://issues.apache.org/jira/browse/CALCITE-4899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17453420#comment-17453420
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Danny Chen commented on CALCITE-4899:
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Sure, we already support table hints for normal table, searched it roughly and 
i did not find any hints on lateral table for popular sql vendors, [~tartarus], 
did you find any practical example there ?

> Support hint for lateral table syntax
> -------------------------------------
>
>                 Key: CALCITE-4899
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4899
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>            Reporter: tartarus
>            Priority: Major
>
> I want to add hint for lateral table syntax,
> like this
> {code:java}
> select * from product, lateral table /*+ HINT_NAME(key='value') 
> */(RAMP(product.product_id))
> {code}
> then we can pass more information to specific tableFunction



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