You cannot. My proposal only works for simple column names. Do you really need to pass the columns names? Can you not use 

my $rs = $sth->fetchall_arrayref({});

[download]

without specifying the columns? According to the documentation it should work but I do not have your database to test it. This way everything would be controlled by your sql only.

In reply to Re^5: My doubts about using fetchall_arrayref by hdb
in thread My doubts about using fetchall_arrayref by Anonymous Monk

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