Re: support create index on virtual generated column.

On Mon, 14 Apr 2025 at 16:10, jian he <jian.universality@gmail.com> wrote:
>
> new patch attached. Now,
> ALTER TABLE DROP COLUMN works fine.
> ALTER INDEX ATTACH PARTITION works fine.
> creating such an index on a partitioned table works just fine.
> for table inheritance: create index on parent table will not cascade
> to child table,
> so we don't need to worry about this.

Hi! I reviewed v2, and it seems to be working now.

But there are tests that are comment-out, what is their purpose? I
note that commit 83ea6c5 also included some commented tests, so
perhaps there's a reason I'm not aware of.

```
ALTER TABLE gtest22c DROP COLUMN e;
\d gtest22c

-- EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE b * 3 = 6;
-- SELECT * FROM gtest22c WHERE b * 3 = 6;
-- EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
-- SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
```


-- 
Best regards,
Kirill Reshke