Re: Patch to add a primary key using an existing index

I've taken a look at this version of the patch.

Submission Review
----------------
This version of the patch applies cleanly to master. It matches your git
repo and includes test + docs.

Usability Review
---------------

The command syntax now matches what was discussed during the last cf.

The text of the notice:

test=# alter table a add constraint acons unique using index aind2;
NOTICE: ALTER TABLE / ADD UNIQUE USING INDEX will rename index "aind2"
to "acons"

Documentation
----------

I've attached a patch (to be applied on top of your latest patch) with
some editorial changes I'd recommend to your documentation. I feel it
reads a bit clearer (but others should chime in if they disagree or have
better wordings)

A git tree with changes rebased to master + this change is available
at https://github.com/ssinger/postgres/tree/ssinger/constraint_with_index

Code Review
-----------

src/backend/parser/parse_utilcmd.c: 1452
Your calling strdup on the attribute name. I don't have a good enough
grasp on the code to be able to trace this through to where the memory
gets free'd. Does it get freed? Should/could this be a call to pstrdup

Feature Test
-------------

I wasn't able to find any issues in my testing

I'm marking this as returned with feedback pending your answer on the
possible memory leak above but I think the patch is very close to being
ready.

Steve Singer