如何对所有列使用selectall-hashref

时间:2015-02-12 12:35:24

标签: perl

我想使用selectall_hashref

实现此子例程
sub query {
    use SQL::Abstract;
    my $sql = SQL::Abstract->new;
    my ($table, $fields, $where) = @_;
    my ($stmt, @bind) = $sql->select($table, $fields, $where);
    my $sth = $dbh->prepare($stmt);
    $sth->execute(@bind);
    my @rows;
    while(my @row = $sth->fetchrow_array() ) {
        my %data;
        @data{ @{$sth->{NAME}} } = @row;
        push @rows, \%data;
    }
    return \@rows;
}

不幸的是selectall_hashref需要一个想要列的列表。有没有办法写一些类似我的第一个子程序?

显然这不起作用:

sub query {
   return $dbh->selectall_hashref(shift, q/*/);
}

预期输出可以是哈希数组或哈希哈希值:

{ '1' => { column1 => 'foo', column2 => 'bar' }, 
  '2' => { column1 => '...', column2 => '...' },
  ... } 

[ { column1 => 'foo', column2 => 'bar' }, 
  { column1 => '...', column2 => '...' },
  ... ]

1 个答案:

答案 0 :(得分:3)

您想要的是selectall_arrayref,而不是selectall_hashref。这完全是这样做的。

use DBI;
use Data::Printer;

my $dbh = DBI->connect('DBI:mysql:database=foo;', 'foo', 'bar');

my $foo = $dbh->selectall_arrayref(
  'select * from foo',
  { Slice => {} }
);

p $foo

__END__

\ [
    [0]   {
        id    1,
        baz   "",
    },
    [1]   {
        id    2,
        baz   "",

    },
]