Re: [Proposal] Global temporary tables

>Fixed in global_temporary_table_v29-pg13.patch
>Please check.

I find this is the most latest mail with an attachment, so I test and reply on
this thread, several points as below:

1. I notice it produces new relfilenode when new session login and some
data insert. But the relfilenode column in pg_class still the one when create
the global temp table. I think you can try to show 0 in this area as what nail
relation does.

2. The nail relations handle their relfilenodes by RelMapFile struct, and this
patch use hash entry and relfilenode_list, maybe RelMapFile approach more
understandable in my opinion. Sorry if I miss the real design for that.

3. I get a wrong result of pg_relation_filepath() function for global temp table,
I think it's necessaryto keep this an correct output.

4. In gtt_search_by_relid() function, it has not handle the missing_ok argument
if gtt_storage_local_hash is null. There should be some comments if it's the right
code.

5. It's a long patch and hard to review, I think it will pretty good if it can be
divided into several subpatches with relatively independent subfunctions.

Regards,
Highgo Software (Canada/China/Pakistan)
URL : www.highgo.ca
EMAIL: mailto:movead(dot)li(at)highgo(dot)ca