#limited has_many
( $attrs->{rows} && keys %{$attrs->{collapse}} )
||
- # limited prefetch with RNO subqueries (otherwise a risk of column name clashes)
- (
- $attrs->{rows}
- &&
- $sql_maker->limit_dialect eq 'RowNumberOver'
- &&
- $attrs->{_prefetch_select}
- &&
- @{$attrs->{_prefetch_select}}
- )
- ||
# grouped prefetch (to satisfy group_by == select)
( $attrs->{group_by}
&&
($ident, $select, $where, $attrs)
= $self->_adjust_select_args_for_complex_prefetch ($ident, $select, $where, $attrs);
}
-
- elsif (
- # the RNO limit dialect mangles the SQL such that the join gets lost
- # wrap a subquery here
- ($attrs->{rows} || $attrs->{offset})
- &&
- $sql_maker->limit_dialect eq 'RowNumberOver'
- &&
- (ref $ident eq 'ARRAY' && @$ident > 1) # indicates a join
- &&
- scalar $self->_parse_order_by ($attrs->{order_by})
- ) {
-
- push @limit, delete @{$attrs}{qw/rows offset/};
-
- my $subq = $self->_select_args_to_query (
- $ident,
- $select,
- $where,
- $attrs,
- );
-
- $ident = {
- -alias => $attrs->{alias},
- -source_handle => $ident->[0]{-source_handle},
- $attrs->{alias} => $subq,
- };
-
- # all part of the subquery now
- delete @{$attrs}{qw/order_by group_by having/};
- $where = undef;
- }
-
elsif (! $attrs->{software_limit} ) {
push @limit, $attrs->{rows}, $attrs->{offset};
}