I am trying to run a select query against a mySQL database using the following code: 
my $filter = "('Y' || 'N')";
my $sth = $dbh->prepare(q{SELECT name FROM catagories WHERE catagories
+.workrelated = ? ORDER BY name});
$sth->execute($filter);

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However, this returns no data. Even if I omit the variable and do this: 
my $sth = $dbh->prepare(q{SELECT name FROM catagories WHERE catagories
+.workrelated = ? ORDER BY name});
$sth->execute("('Y' || 'N')");

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I still get nothing. If I put the information in $filter directly into the prepare statement like this: 
my $sth = $dbh->prepare(q{SELECT name FROM catagories WHERE catagories
+.workrelated = ('Y' || 'N') ORDER BY name});
$sth->execute();

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Then the output is correct. What am I doing that confuses the DBI?

In reply to Prepared query not accepting || instruction at execution by jpfarmer

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