Re^4: My doubts about using fetchall_arrayref

[Anonymous Monk]

I know, but my question was in regards of this situation:
How would I pass " CONVERT(VARCHAR(10),date,101)" to the names of columns. From this code:

...
my $sql  = "select id, account_number, CONVERT(VARCHAR(10),date,101) a
+s date
                from my_table where id <>''
                order by date desc";

my @columns = qw( id account_number box );

my $results = $self->_all_data($sql, \@columns);
...

To this:

...
my @columns = qw( id account_number date );

my $sql  = "select ".join( ",", @columns).
                " from my_table where id <>''
                order by date desc";

my $results = $self->_all_data($sql, \@columns);
...

[hdb]

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({});

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.

[Anonymous Monk]

In this case I will use the sample below for SQL queries that require a more complex call, yes I could use this:

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

...
my $sql  = "select id, account_number, CONVERT(VARCHAR(10),date,101) a
+s date
                from my_table where id <>''
                order by date desc";

my @columns = qw( id account_number box );

my $results = $self->_all_data($sql, \@columns);
...

[CountOrlok]

If you have a more advanced query like this one:

my $sql = "select id, account_number, CONVERT(VARCHAR(10),date,101) as
+ date
                from my_table where id <> ''
                order by date desc";

Then you can call the version of _all_data() that I gave above as either:

my @columns = qw( id account_number date );
my $results = $self->_all_data($sql, \@columns);

or

my $results = $self->_all_data($sql);

They will both get the same result set.