Re: BUG #13889: psql doesn't exequte correct script

Hi

2016-01-25 18:09 GMT+01:00 <v_bilyak(at)mail(dot)ru>:

> The following bug has been logged on the website:
>
> Bug reference: 13889
> Logged by: Vladimir
> Email address: v_bilyak(at)mail(dot)ru
> PostgreSQL version: 9.5.0
> Operating system: Windows 10
> Description:
>
> Hello. I faced the following issue: psql.exe does not execute the following
> script
>
> DROP DATABASE "demo_crash";
> CREATE DATABASE "demo_crash";
>
> aborting with error:
>
> CREATE DATABASE cannot be executed from a function or multi-command string
>

> I searched in Google for solution but found only suggestion to rebuild
> Postgres with some fix in source code that is not acceptable in my case. Do
> you have another suggestion how to resolve it? Thank you in advance for any
> help!
>

It isn't bug. You probably use "-c" option. All statements executed by this
option are executed in one transaction. Some statements like CREATE
DATABASE or DROP DATABASE cannot be called from transaction.

[pavel(at)dhcppc2 ~]$ psql -c "DROP DATABASE demo_crash; CREATE DATABASE
demo_crash" postgres
Debug assertions "off"
ERROR: 25001: DROP DATABASE cannot be executed from a function or
multi-command string
LOCATION: PreventTransactionChain, xact.c:3158
Time: 0.488 ms

The solution is in next release 9.6, that allows multiple -c options

[pavel(at)dhcppc2 ~]$ psql -c "DROP DATABASE demo_crash" -c "CREATE DATABASE
demo_crash" postgres
Debug assertions "off"
ERROR: 3D000: database "demo_crash" does not exist
LOCATION: dropdb, dbcommands.c:797
Time: 0.399 ms
CREATE DATABASE
Time: 711.694 ms

For current release use echo and pipe

[pavel(at)dhcppc2 ~]$ echo "DROP DATABASE demo_crash; CREATE DATABASE
demo_crash" | psql postgres
Debug assertions "off"
DROP DATABASE
Time: 224.953 ms
CREATE DATABASE
Time: 742.695 ms

I have not windows, but it should work

Regards

Pavel

>
> Sincerely,
> Vladimir
>
>
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