use strict;
use warnings;
use Scope::Guard ();
-use Context::Preserve ();
+use Context::Preserve 'preserve_context';
use Try::Tiny;
use namespace::clean;
__PACKAGE__->set_primary_key('id');
__PACKAGE__->sequence('mysequence');
+ # Somewhere in your Code
+ # add some data to a table with a hierarchical relationship
+ $schema->resultset('Person')->create ({
+ firstname => 'foo',
+ lastname => 'bar',
+ children => [
+ {
+ firstname => 'child1',
+ lastname => 'bar',
+ children => [
+ {
+ firstname => 'grandchild',
+ lastname => 'bar',
+ }
+ ],
+ },
+ {
+ firstname => 'child2',
+ lastname => 'bar',
+ },
+ ],
+ });
+
+ # select from the hierarchical relationship
+ my $rs = $schema->resultset('Person')->search({},
+ {
+ 'start_with' => { 'firstname' => 'foo', 'lastname' => 'bar' },
+ 'connect_by' => { 'parentid' => { '-prior' => \'persionid' },
+ 'order_siblings_by' => { -asc => 'name' },
+ };
+ );
+
+ # this will select the whole tree starting from person "foo bar", creating
+ # following query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # START WITH
+ # firstname = 'foo' and lastname = 'bar'
+ # CONNECT BY
+ # parentid = prior persionid
+ # ORDER SIBLINGS BY
+ # firstname ASC
+
=head1 DESCRIPTION
This class implements base Oracle support. The subclass
use base qw/DBIx::Class::Storage::DBI/;
use mro 'c3';
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::Oracle');
+
sub deployment_statements {
my $self = shift;;
my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_;
$sqltargs->{quote_table_names} = $quote_char ? 1 : 0;
$sqltargs->{quote_field_names} = $quote_char ? 1 : 0;
- my $oracle_version = try { $self->_get_dbh->get_info(18) };
-
- $sqltargs->{producer_args}{oracle_version} = $oracle_version;
+ if (
+ ! exists $sqltargs->{producer_args}{oracle_version}
+ and
+ my $dver = $self->_server_info->{dbms_version}
+ ) {
+ $sqltargs->{producer_args}{oracle_version} = $dver;
+ }
$self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
}
$self->_do_query('alter session set constraints = immediate');
});
- return Context::Preserve::preserve_context(sub { $sub->() },
- after => sub { $txn_scope_guard->commit });
+ return
+ preserve_context { $sub->() } after => sub { $txn_scope_guard->commit };
}
+=head1 ATTRIBUTES
+
+Following additional attributes can be used in resultsets.
+
+=head2 connect_by or connect_by_nocycle
+
+=over 4
+
+=item Value: \%connect_by
+
+=back
+
+A hashref of conditions used to specify the relationship between parent rows
+and child rows of the hierarchy.
+
+
+ connect_by => { parentid => 'prior personid' }
+
+ # adds a connect by statement to the query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY
+ # parentid = prior persionid
+
+
+ connect_by_nocycle => { parentid => 'prior personid' }
+
+ # adds a connect by statement to the query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY NOCYCLE
+ # parentid = prior persionid
+
+
+=head2 start_with
+
+=over 4
+
+=item Value: \%condition
+
+=back
+
+A hashref of conditions which specify the root row(s) of the hierarchy.
+
+It uses the same syntax as L<DBIx::Class::ResultSet/search>
+
+ start_with => { firstname => 'Foo', lastname => 'Bar' }
+
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # START WITH
+ # firstname = 'foo' and lastname = 'bar'
+ # CONNECT BY
+ # parentid = prior persionid
+
+=head2 order_siblings_by
+
+=over 4
+
+=item Value: ($order_siblings_by | \@order_siblings_by)
+
+=back
+
+Which column(s) to order the siblings by.
+
+It uses the same syntax as L<DBIx::Class::ResultSet/order_by>
+
+ 'order_siblings_by' => 'firstname ASC'
+
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY
+ # parentid = prior persionid
+ # ORDER SIBLINGS BY
+ # firstname ASC
+
=head1 AUTHOR
See L<DBIx::Class/CONTRIBUTORS>.