I am trying to bind an undef into an IsNull on a varchar field. When I write the query binding directly into the IsNull I get no records, yet if I create a SQL variable, bind the undef to that, and then use the SQL variable - I get results. I have created a test script that duplicates the problem (sorry the test is not the best but it does illustrate the problem). The test script is done off of the Northwind database for SQL Server 2000.
Software: Easysoft unixODBC-2.2.11 perl, v5.8.6 built for sun4-solaris DBD-ODBC-1.13 DBI-1.48 SQL Server 2000 Test Script: #!perl -w -I./t use Test::More; $| = 1; use_ok('DBI', qw(:sql_types)); use_ok('ODBCTEST'); # to help ActiveState's build process along by behaving (somewhat) if a dsn is not provided BEGIN { if (!defined $ENV{DBI_DSN}) { plan skip_all => "DBI_DSN is undefined"; } else { plan tests =>4; } } #DBI->trace(2); my $dbh = DBI->connect(); unless($dbh) { # BAILOUT("Unable to connect to the database ($DBI::errstr)\nTests skipped.\n"); exit 0; } $dbh->{AutoCommit} = 1; #### testing a simple select my $rc = 0; my $CustomerID; my $sql=" Declare [EMAIL PROTECTED] varchar(20) SET [EMAIL PROTECTED] select * from ORders where CustomerID = isnull([EMAIL PROTECTED],'VINET') "; my $sth = $dbh->prepare(qq{$sql}); $sth->bind_param(1,$CustomerID); $sth->execute(); my $RowCount=0; while(my $row = $sth->fetchrow_hashref()) { $RowCount++; } is($RowCount,5, "This works"); my $sql2=" select * from ORders where CustomerID = isnull(?,'VINET') "; my $sth2 = $dbh->prepare($sql2); $sth2->bind_param(1,$CustomerID); $sth2->execute(); $RowCount=0; while(my $row = $sth2->fetchrow_hashref()) { $RowCount++; } is($RowCount,5, "This Doesnt"); # Test(1); # clean up $sth->finish exit(0); __END__ COMMAND OUTPUT: #perl Makefile.PL Useless use of private variable in void context at Makefile.PL line 431. Configuring DBD::ODBC ... >>> Remember to actually *READ* the README file! And re-read it if you have any problems. Using DBI 1.48 (for perl 5.008006 on sun4-solaris) installed in /usr/perl5.8.6/lib/site_perl/5.8.6/sun4-solaris/auto/DBI/ Using ODBC in /usr/local/easysoft/unixODBC Umm, this looks like a unixodbc type of driver manager. We expect to find the sql.h, sqlext.h and (which were supplied with unixODBC) in $ODBCHOME/include directory alongside the /usr/local/easysoft/unixODBC/lib/libodbc.so library. in $ODBCHOME/lib Checking if your kit is complete... Looks good Injecting selected odbc driver into cc command Injecting selected odbc driver into cc command Using DBI 1.48 (for perl 5.008006 on sun4-solaris) installed in /usr/perl5.8.6/lib/site_perl/5.8.6/sun4-solaris/auto/DBI/ Writing Makefile for DBD::ODBC The DBD::ODBC tests will use these values for the database connection: DBI_DSN=dbi:ODBC:dsn_Northwind e.g. dbi:ODBC:demo DBI_USER=webuser DBI_PASS=test #make cp Changes blib/lib/DBD/ODBC/Changes.pm cp ODBC.pm blib/lib/DBD/ODBC.pm /usr/bin/perl -p -e "s/~DRIVER~/ODBC/g" /usr/perl5.8.6/lib/site_perl/5.8.6/sun4-solaris/auto/DBI//Driver.xst > ODBC.xsi /usr/bin/perl /usr/perl5.8.6/lib/5.8.6/ExtUtils/xsubpp -typemap /usr/perl5.8.6/lib/5.8.6/ExtUtils/typemap ODBC.xs > ODBC.xsc && mv ODBC.xsc ODBC.c Warning: duplicate function definition 'data_sources' detected in ODBC.xs, line 202 gcc -c -I/usr/local/easysoft/unixODBC/include -I. -I/usr/perl5.8.6/lib/site_perl/5.8.6/sun4-solaris/auto/DBI/ -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O -DVERSION=\"1.13\" -DXS_VERSION=\"1.13\" -fPIC "-I/usr/perl5.8.6/lib/5.8.6/sun4-solaris/CORE" -I/usr/local/easysoft/unixODBC/include ODBC.c gcc -c -I/usr/local/easysoft/unixODBC/include -I. -I/usr/perl5.8.6/lib/site_perl/5.8.6/sun4-solaris/auto/DBI/ -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O -DVERSION=\"1.13\" -DXS_VERSION=\"1.13\" -fPIC "-I/usr/perl5.8.6/lib/5.8.6/sun4-solaris/CORE" -I/usr/local/easysoft/unixODBC/include dbdimp.c Running Mkbootstrap for DBD::ODBC () chmod 644 ODBC.bs rm -f blib/arch/auto/DBD/ODBC/ODBC.so LD_RUN_PATH="/usr/local/easysoft/unixODBC/lib" gcc -G -L/usr/local/lib ODBC.o dbdimp.o -o blib/arch/auto/DBD/ODBC/ODBC.so -L/usr/local/easysoft/unixODBC/lib -lodbc chmod 755 blib/arch/auto/DBD/ODBC/ODBC.so cp ODBC.bs blib/arch/auto/DBD/ODBC/ODBC.bs chmod 644 blib/arch/auto/DBD/ODBC/ODBC.bs Manifying blib/man3/DBD::ODBC.3 Then of course make test fails on my test script above. Brian Becker Jaeb Center for Health Research 15310 Amberly Drive Suite 350 Tampa, FL 33647 tel: 813-975-8690 fax: 813-975-8761 email: [EMAIL PROTECTED] http://www.jaeb.org