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

2020年3月4日 下午3:49，Prabhat Sahu <prabhat.sahu@enterprisedb.com> 写道：

On Tue, Mar 3, 2020 at 2:11 PM 曾文旌(义从) <wenjing.zwj@alibaba-inc.com> wrote:

I fixed in global_temporary_table_v16-pg13.patch.

  

Thank you Wenjing for the patch.

Now we are getting corruption with GTT with below scenario.

postgres=# CREATE GLOBAL TEMPORARY TABLE gtt1(c1 bigint, c2 bigserial) on commit delete rows;
CREATE TABLE
postgres=# CREATE GLOBAL TEMPORARY TABLE gtt2(c1 bigint, c2 bigserial) on commit preserve rows;
CREATE TABLE
postgres=# \q

[edb@localhost bin]$ echo "1
> 2
> 3
> "> t.dat

[edb@localhost bin]$ ./psql  postgres
psql (13devel)
Type "help" for help.

postgres=# \copy gtt1(c1) from 't.dat' with  csv;
ERROR:  could not read block 0 in file "base/13585/t3_16384": read only 0 of 8192 bytes
CONTEXT:  COPY gtt1, line 1: "1"

postgres=# \copy gtt2(c1) from 't.dat' with  csv;
ERROR:  could not read block 0 in file "base/13585/t3_16390": read only 0 of 8192 bytes
CONTEXT:  COPY gtt2, line 1: "1"

NOTE: We end with such corruption for "bigserial/smallserial/serial" datatype columns.

--

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