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Posted to issues@calcite.apache.org by "duan xiong (Jira)" <ji...@apache.org> on 2021/08/23 06:46:00 UTC

[jira] [Commented] (CALCITE-4750) derive the table structurt

    [ https://issues.apache.org/jira/browse/CALCITE-4750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17402978#comment-17402978 ] 

duan xiong commented on CALCITE-4750:
-------------------------------------

[~season] Hi. You can send a email to dev list about this question.

> derive the table structurt
> --------------------------
>
>                 Key: CALCITE-4750
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4750
>             Project: Calcite
>          Issue Type: Wish
>          Components: core
>    Affects Versions: 1.20.0
>            Reporter: Qingyang Feng
>            Priority: Minor
>
> I want to derive the table structure from the insert statement. 
> For example,
>  insert into table2 select field1, field2 from table1;
> Derive the table structure of table2 from table1.
> The performUnconditionalRewrites method in SqlValidatorImpl can obtain the table structure from the insert statement when verifying SQL statements. However, the method is a private method. Therefore, I have to obtain the table structure through reflection. Is there a more convenient way to do that?



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