Re: [Proposal] Global temporary tables

Hi Wenjing,

Thanks for the patch. I have verified the previous issues with "gtt_v18_pg13.patch" and those are resolved.

Please find below case:

postgres=# create sequence seq;
CREATE SEQUENCE

postgres=# CREATE GLOBAL TEMPORARY TABLE gtt1(c1 int PRIMARY KEY) ON COMMIT DELETE ROWS;
CREATE TABLE

postgres=# CREATE GLOBAL TEMPORARY TABLE gtt2(c1 int PRIMARY KEY) ON COMMIT PRESERVE ROWS;
CREATE TABLE

postgres=# alter table gtt1 add c2 int default nextval('seq');
ERROR:  cannot reindex global temporary tables

postgres=# alter table gtt2 add c2 int default nextval('seq');
ERROR:  cannot reindex global temporary tables

Note: We are getting this error if we have a key column(PK/UNIQUE) in a GTT, and trying to add a column with a default sequence into it.