Re: error on drop table

> regression=# DROP TABLE tqt;
> NOTICE:  FlushRelationBuffers(tqt, 0): block 0 is referenced (private 2, global 1)
> ERROR:  heap_drop_with_catalog: FlushRelationBuffers returned -2
> regression=#
>
> The error message is evidently arising because the cursor's seqscan
> still has a pin on the scan's current page.
>
> Ideally we should refuse to execute the DROP because of the open cursor.
> Offhand I don't see an easy way to do that, however.  Bruce, would you
> put something about it in TODO?

Seems it fails with temp and regular tables.  Added to TODO:

        o Prevent DROP of table being referenced by our own open cursor

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