has sqla => (
is => 'ro', init_arg => undef,
handles => [ qw(
- expand_expr expand_maybe_list_expr render_aqt join_query_parts
+ expand_expr render_aqt join_query_parts
) ],
);
clause_expanders => [
"select.from", '_expand_from_list',
'select.group_by'
- => sub { $_[0]->expand_maybe_list_expr($_[2], -ident) },
+ => sub { $_[0]->expand_expr({ -list => $_[2] }, -ident) },
'select.having'
=> sub { $_[0]->expand_expr($_[2]) },
'update.from' => '_expand_from_list',
my $sqla = SQL::Abstract->new;
SQL::Abstract::ExtraClauses->apply_to($sqla);
+=head1 WARNING
+
+This module is basically a nursery for things that seem like a good idea
+to live in until we figure out if we were right about that.
+
=head1 METHODS
=head2 apply_to
x LEFT JOIN ( y LEFT JOIN z )
[]
+=head1 STATEMENT EXTENSIONS
+
+=head2 group by clause for select
+
+Expanded as a list with an ident default:
+
+ # expr
+ { -select => { group_by => [ 'foo', 'bar' ] } }
+
+ # aqt
+ { -select => { group_by =>
+ {
+ -op => [ ',', { -ident => [ 'foo' ] }, { -ident => [ 'bar' ] } ]
+ }
+ } }
+
+ # query
+ GROUP BY foo, bar
+ []
+
+=head2 having clause for select
+
+Basic expr, just like where, given having is pretty much post-group-by
+where clause:
+
+ # expr
+ { -select =>
+ { having => { '>' => [ { -count => { -ident => 'foo' } }, 3 ] } }
+ }
+
+ # aqt
+ { -select => { having => { -op => [
+ '>', { -func => [ 'count', { -ident => [ 'foo' ] } ] },
+ { -bind => [ undef, 3 ] },
+ ] } } }
+
+ # query
+ HAVING COUNT(foo) > ?
+ [ 3 ]
+
=cut