Hi Martin,
I tried setting both variables at the very beginning before any connection is
made and the result is still the same.
$ENV{ora_envhp} = 0;
$ENV{ORA_ENVHP} = 0;
Peter
-----Original Message-----
From: Martin Evans [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 12, 2007 1:47 AM
To: dbi-users@perl.org
Subject: Re: ORA-12154: TNS:could not resolve the connect identifier specified
Loo, Peter # PHX wrote:
> Hello All,
>
> I am confused as to why I am getting this error message. I am trying
> to connect to two different Oracle instances within one program run.
> The two Oracle instances are different in versions. inst1 is 9.2
> while
> inst2 is 10.2. I am able to connect to the first instance without
> problems, but the instance yields "ORA-12154" error. However, when I
> reverse the connection order by connecting the inst2 with 10.2 version
> first, then connecting to the inst1 with 9.2 version, there is no error.
> I hope someone can shed some lite. Here is the code:
>
> #!/usr/bin/perl
>
> use DBI;
>
> $ENV{'ORACLE_HOME'} = "/opt/app/oracle/product/9.2"; $ENV{'PATH'} =
> "/opt/app/oracle/product/9.2/bin:/usr/ccs/bin:/opt/studio9/SUNWspro/bin:
> /opt/app/oracle/product/10.2/bin:/opt/CA/Shar
> edComponents/dmscript/bin:/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/
> lo cal/bin:/opt/app/oracle/product/8.1.7.4/bin:/usr/local/bin:/
> usr/local/apps/common/devl/bin:/usr/lbin:/usr/ccs/bin:/usr/xpg4/bin:/o
> pt /pkware:/opt/RICHPse/bin:/opt/RICHPse/examples:/opt/sas82:/o
> pt/sas82/sasexe:/opt/Navisphere/bin:/opt/fileport/bin:/opt/syncsort/bin:
> /usr/bin:/usr/openwin/bin:/opt/SUNWspro/bin:/opt/mfcobol/cob
> ol/bin:/opt/starsql/bin:/opt/uni/bin:/opt/uni/scripts:/etc:/opt/emc/EM
> Cp ower/bin/sparcv9:/etc/emc/bin:/usr/local/nz/bin/:.";
>
> my $dbh_inst1 = DBI->connect("dbi:Oracle:inst1", "schema", "password",
> { RaiseError => 1, PrintError => 1});
>
> $ENV{'ORACLE_HOME'} = "/opt/app/oracle/product/10.2"; $ENV{'PATH'} =
> "/opt/app/oracle/product/10.2/bin:/opt/app/oracle/product/9.2/bin:/usr
> /c cs/bin:/opt/studio9/SUNWspro/bin:/opt/CA/Shar
> edComponents/dmscript/bin:/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/
> lo cal/bin:/opt/app/oracle/product/8.1.7.4/bin:/usr/local/bin:/
> usr/local/apps/common/devl/bin:/usr/lbin:/usr/ccs/bin:/usr/xpg4/bin:/o
> pt /pkware:/opt/RICHPse/bin:/opt/RICHPse/examples:/opt/sas82:/o
> pt/sas82/sasexe:/opt/Navisphere/bin:/opt/fileport/bin:/opt/syncsort/bin:
> /usr/bin:/usr/openwin/bin:/opt/SUNWspro/bin:/opt/mfcobol/cob
> ol/bin:/opt/starsql/bin:/opt/uni/bin:/opt/uni/scripts:/etc:/opt/emc/EM
> Cp ower/bin/sparcv9:/etc/emc/bin:/usr/local/nz/bin/:.";
>
> my $dbh_inst2 = DBI->connect("dbi:Oracle:inst2", "schema", "password",
> { RaiseError => 1, PrintError => 1});
>
> $dbh_inst1->disconnect();
> $dbh_inst2->disconnect();
>
> exit;
>
> Here is the error message:
>
> DBI connect('inst2','schema',...) failed: ORA-12154: TNS:could not
> resolve the connect identifier specified (DBD ERROR: OCIServerAttach)
>
> Thanks.
>
> Peter
>
Sounds as though you have hit an issue sharing an env.
I'm not sure as I've not done this myself but you may need to look at the
ora_envhp attribute:
The first time a connection is made a new OCI ’environment’ is created by
DBD::Oracle and stored in the driver handle. Subsequent connects reuse (share)
that same OCI environment by default.
The ora_envhp attribute can be used to disable the reuse of the OCI environment
from a previous connect. If the value is 0 then a new OCI environment is
allocated and used for this connection.
The OCI environment is what holds information about the client side con‐ text,
such as the local NLS environment. So by altering %ENV and setting ora_envhp to
0 you can create connections with different NLS settings.
This is most useful for testing.
Martin
--
Martin J. Evans
Easysoft Limited
http://www.easysoft.com
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