Re: [Proposal] Global temporary tables

> 2020年4月27日 下午9:48，Prabhat Sahu <prabhat(dot)sahu(at)enterprisedb(dot)com> 写道：
>
> Thanks Wenjing, for the fix patch for previous issues.
> I have verified the issues, now those fix look good to me.
> But the below error message is confusing(for gtt2).
>
> postgres=# drop table gtt1;
> ERROR: cannot drop global temp table gtt1 when other backend attached it.
>
> postgres=# drop table gtt2;
> ERROR: cannot drop index idx2 on global temp table gtt2 when other backend attached it.
>
> I feel the above error message shown for "DROP TABLE gtt2;" is a bit confusing(looks similar to DROP INDEX gtt2;).
> If possible, can we keep the error message simple as "ERROR: cannot drop global temp table gtt2 when other backend attached it."?
> I mean, without giving extra information for the index attached to that GTT.
Fixed the error message to make the expression more accurate. In v33.

Wenjing

>
> On Mon, Apr 27, 2020 at 5:34 PM 曾文旌 <wenjing(dot)zwj(at)alibaba-inc(dot)com <mailto:wenjing(dot)zwj(at)alibaba-inc(dot)com>> wrote:
>
>
>> 2020年4月27日 下午5:26，Prabhat Sahu <prabhat(dot)sahu(at)enterprisedb(dot)com <mailto:prabhat(dot)sahu(at)enterprisedb(dot)com>> 写道：
>>
>> Hi Wenjing,
>>
>> Please check the below scenario shows different error message with "DROP TABLE gtt;" for gtt with and without index.
>> -- Session1:
>> postgres=# create global temporary table gtt1 (c1 int);
>> CREATE TABLE
>> postgres=# create global temporary table gtt2 (c1 int);
>> CREATE TABLE
>> postgres=# create index idx2 on gtt2(c1);
>> CREATE INDEX
>>
>> -- Session2:
>> postgres=# drop table gtt1;
>> ERROR: can not drop relation gtt1 when other backend attached this global temp table
>> postgres=# drop table gtt2;
>> ERROR: can not drop index gtt2 when other backend attached this global temp table.
> For DROP GTT, we need to drop the index on the table first.
> So the indexes on the GTT are checked first.
> But the error message needs to be fixed.
> Fixed in v32
>
>
> wenjing
>
>
>
>
>>
>> --
>> With Regards,
>> Prabhat Kumar Sahu
>> EnterpriseDB: http://www.enterprisedb.com <http://www.enterprisedb.com/>
>
>
>
> --
> With Regards,
> Prabhat Kumar Sahu
> EnterpriseDB: http://www.enterprisedb.com <http://www.enterprisedb.com/>