I have a perl script that connect to a postgres db and fetches a couple select statements that it runs on it. This output have the purpose to print in word afterword. While i was building my project i didn't notice something that happens with the fetching part ,it was after i print it in word that i noticed something strange.
I execute a select statement and fetches this in an arrayref , but when i print this arrayreferentie I don't got only values in my array but also empty strings and de cli gives me some error code with it. I firstly though to just chomp after i read a line so that it wil go to the next line but that didn't work . Is there anyone who have come to this problem already ?
This is my code:
my $query = $_[0]; #select multiple columns
my $SQL = $dbh->prepare($query);
$SQL -> execute();
my $headers = $SQL->{NAME};
my $databases = $SQL->fetchall_arrayref();
#testing fase , print the fetch to see what would be print in word
foreach my $row (@$databases)
{
my $databaseColumnNumber =0;
while ($databaseColumnNumber <= @$databases)
{
print "\n" , $row -> [$databaseColumnNumber];
$databaseColumnNumber++;
}
#chomp $row; ### this was a testing line to see if it would chomp after the empty value
}
$SQL->finish();
The output of the print in my CLI is as followed
postgres
10
7856 kB
//emptyline(which represents the empty value in the array
Use of uninitialized value in print atC:\Users\xxxxx
//emptyline(which represents the empty value in the array
Use of uninitialized value in print at
Use of uninitialized value in print atC:\Users\xxxxx
//newline from the print to go to the new line in the array
test
10
7529 kB
//emptyline(which represents the empty value in the array
Use of uninitialized value in print atC:\Users\xxxxx
//emptyline(which represents the empty value in the array
Use of uninitialized value in print at
Use of uninitialized value in print atC:\Users\xxxxx
[EDIT]
$VAR1 = [
[
'postgres',
'10',
'7856 kB'
],
[
'test',
'10',
'7529 kB'
],
[
'template1',
'10',
'6865 kB'
],
[
'template0',
'10',
'6865 kB'
]
];
$VAR1 = [
[
'city',
'408 kB',
'152 kB'
],
[
'countrylanguage',
'136 kB',
'88 kB'
],
[
'country',
'96 kB',
'56 kB'
]
];