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Re^2: From database to hash table

by Tux (Abbot)
on Sep 06, 2012 at 17:26 UTC ( #992155=note: print w/replies, xml ) Need Help??


in reply to Re: From database to hash table
in thread From database to hash table

Faster alternative 1:

my %hash; my %rec; my $sth = $db->prepare ("select * from tablename"); $sth->execute; $sth->bind_columns (\@hash{@{$sth->{NAME_lc}}}); while ($sth->fetch) { $hash{$rec{week}} = [ $rec{month}, $rec{workperiod} ]; }

Faster alternative 2:

my %hash; my $sth = $db->prepare ("select week, month, workperiod from tablename +"); $sth->execute; $sth->bind_columns (\my ($week, $month, $workperiod)); while ($sth->fetch) { $hash{$week} = [ $month, $workperiod ]; }

Readabler alternative 3:

my $dbh = DBI->connect ("dbi:$driver:", "user", "pass", { FetchHashKey +Name => "NAME_lc" }); my %hash; my $sth = $db->prepare ("select week, month, workperiod from tablename +"); $sth->execute; while (my $rec = $sth->fetchrow_hashref) { $hash{$rec->{week}} = [ $rec->{month}, $rec->{workperiod} ]; }

Enjoy, Have FUN! H.Merijn

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