# simplify the joinmap and maybe decide if a grouping (and thus subquery) is necessary
my $relation_classifications;
if (ref($attrs->{from}) eq 'ARRAY') {
- $attrs->{from} = $storage->_prune_unused_joins ($attrs->{from}, $attrs->{select}, $cond, $attrs);
-
- $relation_classifications = $storage->_resolve_aliastypes_from_select_args (
- [ @{$attrs->{from}}[1 .. $#{$attrs->{from}}] ],
- $attrs->{select},
- $cond,
- $attrs
- ) unless $needs_group_by_subq; # we already know we need a group, no point of resolving them
+ if (@{$attrs->{from}} == 1) {
+ # not a fucking JOIN at all, quit with the dickery
+ $relation_classifications = {};
+ } else {
+ $attrs->{from} = $storage->_prune_unused_joins ($attrs->{from}, $attrs->{select}, $cond, $attrs);
+
+ $relation_classifications = $storage->_resolve_aliastypes_from_select_args (
+ [ @{$attrs->{from}}[1 .. $#{$attrs->{from}}] ],
+ $attrs->{select},
+ $cond,
+ $attrs
+ ) unless $needs_group_by_subq; # we already know we need a group, no point of resolving them
+ }
}
else {
$needs_group_by_subq ||= 1; # if {from} is unparseable assume the worst