}),
],
selecting => [
- $self->_extract_order_columns ($attrs->{order_by}, $sql_maker),
$sql_maker->_recurse_fields ($select),
+ ( map { $_->[0] } $self->_extract_order_criteria ($attrs->{order_by}, $sql_maker) ),
],
};
return $aliases_by_type;
}
+# This is the engine behind { distinct => 1 }
sub _group_over_selection {
my ($self, $from, $select, $order_by) = @_;
# add any order_by parts that are not already present in the group_by
# we need to be careful not to add any named functions/aggregates
- # i.e. select => [ ... { count => 'foo', -as 'foocount' } ... ]
- for my $chunk ($self->_extract_order_columns($order_by)) {
+ # i.e. order_by => [ ... { count => 'foo' } ... ]
+ for ($self->_extract_order_criteria($order_by)) {
# only consider real columns (for functions the user got to do an explicit group_by)
- my $colinfo = $rs_column_list->{$chunk}
- or next;
+ next if @$_ != 1;
+ my $chunk = $_->[0];
+ my $colinfo = $rs_column_list->{$chunk} or next;
$chunk = "$colinfo->{-source_alias}.$chunk" if $chunk !~ /\./;
push @group_by, $chunk unless $group_index{$chunk}++;
return $cond;
}
-sub _extract_order_columns {
+sub _extract_order_criteria {
my ($self, $order_by, $sql_maker) = @_;
my $parser = sub {
unless wantarray;
my @chunks;
- for my $chunk (map { ref $_ ? @$_ : $_ } ($sql_maker->_order_by_chunks ($order_by) ) ) {
- $chunk =~ s/\s+ (?: ASC|DESC ) \s* $//ix;
+ for ($sql_maker->_order_by_chunks ($order_by) ) {
+ my $chunk = ref $_ ? $_ : [ $_ ];
+ $chunk->[0] =~ s/\s+ (?: ASC|DESC ) \s* $//ix;
push @chunks, $chunk;
}