Failure to Recognize Field in DBI MySQL access

[monkfan]

Dear monks,
Why was my script below:

use strict;
use Data::Dumper;
use Carp;
use DBI;

my $dsn = 'localhost';
my $user = 'monkfan';
my $password = 'monkfan';
my $dbh = DBI->connect('dbi:mysql:motif_finder','monkfan','monkpwd')
    or die "Connection Error: $DBI::errstr\n";

my $sql = "SELECT Symbol FROM gene2go WHERE GeneID=812222";

my  $sth = $dbh->prepare($sql);
$sth->execute or die "SQL Error: $DBI::errstr\n";


while ( my @row = $sth->fetchrow_array ) {
    print "@row\n";
}

Giving such error message

:!perl  test_dbi.pl                                                   
+                              
DBD::mysql::st execute failed: Unknown column 'Symbol' in 'field list'
+ at test_dbi.pl line 21.
SQL Error: Unknown column 'Symbol' in 'field list'

Even though it is clearly shown in the SQL query below which is equivalent to above Perl script, is actually working?

mysql> select Symbol from gene_info where GeneID = "812222";
+-----------+
| Symbol    |
+-----------+
| PF14_0640 |
+-----------+
1 row in set (13.06 sec)

mysql> show tables;
+------------------------+
| Tables_in_motif_finder |
+------------------------+
| gene2go                |
| gene_info              |
+------------------------+
2 rows in set (0.00 sec)

mysql> show databases;
+--------------+
| Database     |
+--------------+
| motif_finder |
+--------------+
1 rows in set (0.00 sec)

[ikegami]

Your Perl query is different than your MySQL client query. One uses table gene2go while the other uses gene_info.

I don't know if MySQL cares about that, but one query treats GeneID as a string field, while the other treats GeneID as a number field.

[CountZero]

Are you sure the table "gene2go" has a field "Symbol"?