Perl，DBD :: Oracle和Oracle 10g的字符集问题

Question

We have a problem with characters outside of the basic ASCII set appearing as upside down question marks in our Oracle 10g database.

I have the following script to load some test data. The script is saved as Latin-1/ISO-8859-1 on a remote UNIX server from Komodo IDE:

#!/wload/espd/app/perl/bin/perl

use strict; 
use warnings;
use Encode;
use esp_libs_db;
my $dbh = espDbConnectNew();

my $sql = q{ INSERT INTO DBUSER.test VALUES ('qwérty')};

#$sql = encode("iso-8859-1", $sql);

my $rows = $dbh->do($sql)  or Carp::croak "ERROR: PM_DB_0010:[" . $DBI::errstr . "]   Cannot run stmt:\n";;
print $rows;
$dbh->commit();
$dbh->disconnect();



sub espDbConnectNew {
    my ( $database ) = @_;    
    my %connectionStrings = &esp_libs_db::espGetConnectionStrings( $database );

    # Set Environment Variables
    $ENV{ORACLE_SID}=$connectionStrings{"SID"};
    $ENV{ORACLE_HOME}=$connectionStrings{"HOME"};
    my $dbh = DBI->connect("dbi:Oracle:SID=$connectionStrings{'SID'};HOST=$connectionStrings{'HOST'};PORT=$connectionStrings{'PID'}",
    "$connectionStrings{'USER'}","$connectionStrings{'PWD'}",
    {PrintError=>0,
    RaiseError => 0,
    AutoCommit => 0}
) or Carp::croak "ERROR: PM_DB_0003:  Cant connect to db:\n";


    return $dbh;
} #espDbConnect

The database it loads into is an Oracle 10g database with the following parameters:

NLS_NCHAR_CHARACTERSET  AL16UTF16
NLS_LANGUAGE    ENGLISH
NLS_TERRITORY   UNITED KINGDOM
NLS_CHARACTERSET    WE8ISO8859P1

The single column on the test table is of type VARCHAR2(255).

Despite a full working day reading about these problems I don't really know what to do to solve/diagnose the exact problem.

I've tried this both with and without using Encode to encode the SQL string before executing it.

Thanks

Answer 1

How are you retrieving the data when you get the upside down question marks? What is the NLS_LANG environment variable on the client where you are retrieving the data?

In SQL*Plus, can you run

SELECT dump( column_name, 1013 ), column_name
  FROM DBUSER.test

and post the results? The DUMP function shows what is actually stored in the database-- that will show whether the problem is in storing the accented character or whether the problem is in retrieving the accented character.