in reply to Re^3: Saving sql results to an array all rows?
in thread Saving sql results to an array all rows?

Hey thanks again for the reply. I think that I may not be explaining myself in the best way, but here is the code that I have currently. 

my @lines = read_file('/tmp/test.txt');
chomp(@lines);

my $sql = q|select * from table_name where srcaddr = ? or dstaddr = ?|
+;
my $sth = $dbh->prepare($sql) or die "Can't prepare SQL statement: $DB
+I::errstr\n";

foreach my $line (@lines) {
        $sth->execute($line, $line) or die "Can't execute SQL statemen
+t: $DBI::errstr\n";
        my @all_rows;
        while ( my $ref = $sth->fetchrow_arrayref()) {
                push(@all_rows, $ref);
        }
        my @sorted = map {$_->[0]} sort {$a->[1] <=> $b->[1] ||
             $a->[2] <=> $b->[2] || $a->[3] <=> $b->[3] ||
             $a->[4] <=> $b->[4]} map {
             [$_, split(/\./, (split /\s+/, $_)[1])]} @all_rows;
        print "$_\n" for @sorted;
}

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The problem is that whenever I run the code I get the following shown below. I am guessing this is because I am using the array @all_rows which it doesn't know how to handle? I am saving the output/results from the SQL query to an array called @all_rows, now what I want to do is sort the data in column 2 in that array. What is the proper way to work/sort the data in the array @all_rows which contains all the sql results. Thanks again for the help.. 
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)
ARRAY(0x96b0d80)

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FYI if I print the @all_rows array using a foreach loop I get the proper results 
foreach my $row_ref (@all_rows) {
          print "@{$row_ref}\n";
}

[download]

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Re^5: Saving sql results to an array all rows?
by Krambambuli (Curate) on Aug 19, 2008 at 16:12 UTC
    And what happens if you replace your 
     my @sorted =...

    [download]
    with the replacement I've offered in the previous snippet... ?

    Krambambuli
    ---
[reply]
[d/l]
      Hey Krambambuli, thanks again for helping me out. Here is the code that I have with your suggestions(FYI I changed the line in your code that shows @lines to @all_rows and @all_rows to @all_rows1, since the array @lines is storing the data which you manually populated).
      Below the code is a sample of the results. Two questions, the @lines array in your example shows the data correctly as I would like to work with, the only problem is that they are not stored in 1 line in the array. 
      foreach my $line (@lines) {
        $sth->execute($line, $line) or die "Can't execute SQL statemen
+t: $DBI::errstr\n";
        my @all_rows;
        while ( my $ref = $sth->fetchrow_arrayref()) {
                push(@all_rows, $ref );
        }

        my @sorted
        = map { $_->[0] }
          sort { $a->[1] <=> $b->[1]
                         ||
                 $a->[2] <=> $b->[2]
                         ||
                 $a->[3] <=> $b->[3]
                         ||
                 $a->[4] <=> $b->[4]

               } map { [$_, split(/\./, (split /\s+/, $_)[1] ) ] }
                     @all_rows;

        my @all_rows1 = map { [ split( /\s+/, $_ ) ] }
                   @all_rows;

        my @sorted1
        = map { join( ' ', @{ $_->[0] } ) }
          sort { $a->[1] <=> $b->[1]
                         ||
                 $a->[2] <=> $b->[2]
                         ||
                 $a->[3] <=> $b->[3]
                         ||
                 $a->[4] <=> $b->[4]

               } map { [$_, split(/\./, $$_[1] ) ] }
                 @all_rows1;
        print Dumper @sorted1;
}

      [download]
      Here are the results that I am getting with the code shown above looks like I am just getting array refs?? 
      $VAR1 = 'ARRAY(0x94db6f8)';
$VAR2 = 'ARRAY(0x94db6f8)';
$VAR3 = 'ARRAY(0x94db6f8)';
$VAR1 = 'ARRAY(0x94db6f8)';
$VAR2 = 'ARRAY(0x94db6f8)';
$VAR3 = 'ARRAY(0x94db6f8)';
$VAR4 = 'ARRAY(0x94db6f8)';
$VAR5 = 'ARRAY(0x94db6f8)';
$VAR6 = 'ARRAY(0x94db6f8)';
$VAR1 = 'ARRAY(0x94db6f8)';
$VAR1 = 'ARRAY(0x94db6f8)';
$VAR1 = 'ARRAY(0x94db6f8)';

      [download]
      Here is what the results look like if I used the code which I posted in the previous post(keep in mind that the results that I am getting with that code are correct/accurate) but the way it gets printed the sort won't do anything cause the sort is looking for data the look like the data in your @lines example that you used in your sort map. 
      $VAR1 = [
          'data',
          'data',
          'data',
          'data',
          'data',
         ];
$VAR2 = [
          'data',
          'etc..etc',

      [download]
[reply]
[d/l]
[select]
        Oh well... :)

        Just make that
        
foreach my $line (@lines) {
        $sth->execute($line, $line) or die "Can't execute SQL statemen
+t: $DBI::errstr\n";
        my @all_rows;
        while ( my $ref = $sth->fetchrow_arrayref()) {
                push(@all_rows, $ref );
        }

#        my @sorted
#        = map { $_->[0] }
#          sort { $a->[1] <=> $b->[1]
#                         ||
#                 $a->[2] <=> $b->[2]
#                         ||
#                 $a->[3] <=> $b->[3]
#                         ||
#                 $a->[4] <=> $b->[4]
#
#               } map { [$_, split(/\./, (split /\s+/, $_)[1] ) ] }
#                     @all_rows;
#
#        my @all_rows1 = map { [ split( /\s+/, $_ ) ] }
#                   @all_rows;
#
        my @sorted1
        = map { join( ' ', @{ $_->[0] } ) }
          sort { $a->[1] <=> $b->[1]
                         ||
                 $a->[2] <=> $b->[2]
                         ||
                 $a->[3] <=> $b->[3]
                         ||
                 $a->[4] <=> $b->[4]

               } map { [$_, split(/\./, $$_[1] ) ] }
#                 @all_rows1;
                 @all_rows;
#        print Dumper @sorted1;
        print Dumper ( \@sorted1 );
}

        [download]

        Krambambuli
        ---
        enjoying Mark Jason Dominus' Higher-Order Perl
[reply]
[d/l]

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