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https://issues.apache.org/jira/browse/CALCITE-5972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17761712#comment-17761712
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Alessandro Solimando commented on CALCITE-5972:
-----------------------------------------------

For now I suggest to keep it open and decide what to do based on the discussion 
on the ML (resolve it, improve description if confirmed, duplicate if already 
existing, etc.)

> cannot execute a sql like 'insert into A select * from B'
> ---------------------------------------------------------
>
>                 Key: CALCITE-5972
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5972
>             Project: Calcite
>          Issue Type: Bug
>    Affects Versions: 1.35.0
>            Reporter: Moccy.T
>            Priority: Blocker
>
> I have put the
> {code:java}
> org.apache.calcite.adapter.csv.CsvScannableTable{code}
> and its related classes (Factory, Reader......, etc.) into my test project.
> When I tried to execute a sql like
> {code:java}
> insert into mysql.calcite_test (select * from csv) {code}
> an NPE was thrown. where `mysql` is recognised by JdbcSchema#Factory. When I 
> debugged, I found that the bind method of the dynamically generated Bindable 
> code called the JdbcTable's getModifiableCollection() method, which returned 
> null directly. the bind method's subsequent call to collection.size() threw 
> an NPE. this code is identified by the This code is generated by 
> EnumerableTableModify.class.
> After that, I tried to execute 
> {code:java}
> insert into mysql.calcite(select * from mysql2.calcite2){code}
> There are two JdbcSchema#Factory recognised data sources here, but I found 
> that the code that was eventually generated by 
> JdbcToEnumerableConverter.class executed
> {code:java}
> insert into calcite(select * from mysql2.calcite){code}
> in `mysql2` without performing the insert in the `mysql` library.
> Are these issues intentional with calcite or are they bugs?
>  
>  



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