Create two SQL queries and have the sorting there, according to the order you need. Then run each query separately.
I disagree, if only on a technicality. Back to the idea that these are statistics from a batch scheduler, the chance that the underlying data may have changed between the separate query runs is not zero. Instead i would run one select so there is just a single select query cursor instance, and sort the data separately in perl as in
use strict; use warnings;
use DBI;
use JSON 'encode_json';
use cheap::mysqls qw/sql_connect/;
my ($DBH,$rc) = sql_connect(id=>'finddata',dbi=>'mysql');
$DBH->do('DROP view IF EXISTS datas ');
$DBH->do('create
view datas as
select queue_name as name,
jobs_pend as data1,
jobs_run as data2
from queues
');
{
my @col1;
my @col2;
my @oth1;
my @oth2;
my $stmt="select name,data1,data2 from((select name,data1,data2 fr
+om datas order by data1 +data2 desc limit 5 )union all(select 'added
+' as name ,sum(data1) as data1 ,sum(data2) as data2 from (select dat
+a1,data2 from datas order by data2+data1 desc limit 1844674407370955
+1615 offset 5 ) new)) new;";
my $sth = $DBH->prepare( $stmt );
$sth->execute() or die $sth->errstr;
my $tmp = 0;
while(my @row_array=$sth->fetchrow_array)
{
if ($row_array[0] ne 'added') {
push @col1,[$row_array[0],$row_array[1]];
push @col2,[$row_array[0],$row_array[2]];
}
else {
push @oth1,[$row_array[0],$row_array[1]];
push @oth2,[$row_array[0],$row_array[2]];
}
}
$sth->finish;
my @sort1=((sort {$b->[1] <=> $a->[1]} @col1),@oth1);
my $json1 = encode_json( \@sort1 );
print $json1."\n";
my @sort2=((sort {$b->[1] <=> $a->[1]} @col2),@oth2);
my $json2 = encode_json( \@sort2 );
print $json2."\n";
}
$DBH->do('DROP view IF EXISTS datas ');
$DBH->disconnect();
Since they included the json producing code for the creating of the pie charts, i have done so as well. That also explains why they want the separate sorts.
To also add to the incomplete specs in the OP, notice how what was once called the others row has become the added row, yet that is not exhibited in the expected output.
cheap::mysqls is a module in my private library that allows me to easily connect to my mysql and sqlite databases. you may use whatever method you like to connect to yours instead.
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