Re: [Proposal] Global temporary tables - Mailing list pgsql-hackers

2020年3月11日 下午3:52，Prabhat Sahu <prabhat.sahu@enterprisedb.com> 写道：

On Mon, Mar 9, 2020 at 10:02 PM 曾文旌(义从) <wenjing.zwj@alibaba-inc.com> wrote:

Fixed in global_temporary_table_v18-pg13.patch.

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.

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With Regards,
Prabhat Kumar Sahu
EnterpriseDB: http://www.enterprisedb.com