References to them persist in system catalogs. Otherwise, dropping a column would require rewriting every row in the
table.
--
Scott Ribe
scott_ribe@elevated-dev.com
https://www.linkedin.com/in/scottribe/
> On Jun 6, 2018, at 12:43 PM, Wells Oliver <wells.oliver@gmail.com> wrote:
>
> Just curious then, in what meaningful way do dropped columns persist, what are the reasons?
>