DBI->trace(15);
$sth= $dbh->prepare("update sample set name =? where sno = '123a'");
$sth->execute('example');

##</code><code>##

prepare     DISPATCH (DBI::db=HASH(0x2f7c24) rc1/1 @2 g0 ima2201 pid#18749) at testsql.pl line 111
-> prepare for DBD::Sybase::db (DBI::db=HASH(0x2f7c24)~0x1e3e64 'UPDATE sample set name = ? where sno ='123a'')
    New DBI::st (for DBD::Sybase::st, parent=DBI::db=HASH(0x1e3e64), id=)
    dbih_setup_handle(DBI::st=HASH(0x1e4194)=>DBI::st=HASH(0x1e4134), DBD::Sybase::st, 1e41a0, Null!)
    dbih_make_com(DBI::db=HASH(0x1e3e64), 3097e8, DBD::Sybase::st, 420, 0) thr#0
    dbih_setup_attrib(DBI::st=HASH(0x1e4134), Err, DBI::db=HASH(0x1e3e64)) SCALAR(0x283d40) (already defined)
    dbih_setup_attrib(DBI::st=HASH(0x1e4134), State, DBI::db=HASH(0x1e3e64)) SCALAR(0x283da0) (already defined)
    dbih_setup_attrib(DBI::st=HASH(0x1e4134), Errstr, DBI::db=HASH(0x1e3e64)) SCALAR(0x283d70) (already defined)
    dbih_setup_attrib(DBI::st=HASH(0x1e4134), TraceLevel, DBI::db=HASH(0x1e3e64)) 0 (already defined)
    dbih_setup_attrib(DBI::st=HASH(0x1e4134), FetchHashKeyName, DBI::db=HASH(0x1e3e64)) 'NAME' (already defined)
    dbih_setup_attrib(DBI::st=HASH(0x1e4134), HandleSetErr, <br>DBI::db=HASH(0x1e3e64)) undef (not defined)
    dbih_setup_attrib(DBI::st=HASH(0x1e4134), HandleError, <br>DBI::db=HASH(0x1e3e64)) undef (not defined)
    syb_st_prepare() -> inUse = 0
    dbd_preparse parameter :p1 ()
    dbd_preparse scanned 1 distinct placeholders
    dyn_prepare: ct_dynamic(CS_PREPARE) for DBD1
   syb_alloc_cmd() -> CS_COMMAND 30b3a0 for CS_CONNECTION 135260
ct_send(CS_DESCRIBE_INPUT) returned 0 at /usr/local/lib/perl5/site_perl/5.8.7/sun4-solaris/DBD/Sybase.pm line 133.
    dyn_prepare: ct_dynamic(CS_DESCRIBE_INPUT) for DBD1
    dyn_prepare: ct_results(CS_DESCRIBE_INPUT) for DBD1 - restype 4051
Segmentation Fault (core dumped)