use strict;
use warnings;
+use Scope::Guard ();
+use Context::Preserve ();
=head1 NAME
__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 ||= {};
- my $quote_char = $self->schema->storage->{'_sql_maker_opts'}->{'quote_char'};
- $sqltargs->{quote_table_names} = 0 unless $quote_char;
- $sqltargs->{quote_field_names} = 0 unless $quote_char;
+ my $quote_char = $self->schema->storage->sql_maker->quote_char;
+ $sqltargs->{quote_table_names} = $quote_char ? 1 : 0;
+ $sqltargs->{quote_field_names} = $quote_char ? 1 : 0;
- my $oracle_version = eval { $self->_get_dbh->get_info(18) };
+ my $oracle_version = eval { $self->_get_dbh->get_info(18) };
$sqltargs->{producer_args}{oracle_version} = $oracle_version;
- $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
+ $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
}
sub _dbh_last_insert_id {
sub _dbh_get_autoinc_seq {
my ($self, $dbh, $source, $col) = @_;
- # check if quoting is on
- my $quote_char = $self->schema->storage->{'_sql_maker_opts'}->{'quote_char'};
+ my $sql_maker = $self->sql_maker;
- # look up the correct sequence automatically
- my $sql = q{
- SELECT trigger_body FROM ALL_TRIGGERS t
- WHERE t.table_name = ?
- AND t.triggering_event = 'INSERT'
- AND t.status = 'ENABLED'
- };
+ my $source_name;
+ if ( ref $source->name eq 'SCALAR' ) {
+ $source_name = ${$source->name};
+ }
+ else {
+ $source_name = $source->name;
+ }
+ $source_name = uc($source_name) unless $sql_maker->quote_char;
# trigger_body is a LONG
local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
- my $sth;
+ # disable default bindtype
+ local $sql_maker->{bindtype} = 'normal';
- my $source_name;
- if ( ref $source->name ne 'SCALAR' ) {
- $source_name = $source->name;
- }
- else {
- $source_name = ${$source->name};
- }
- $source_name = uc($source_name) unless $quote_char;
-
- # check for fully-qualified name (eg. SCHEMA.TABLENAME)
- if ( my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/ ) {
- $sql = q{
- SELECT trigger_body FROM ALL_TRIGGERS t
- WHERE t.owner = ? AND t.table_name = ?
- AND t.triggering_event = 'INSERT'
- AND t.status = 'ENABLED'
- };
- $sth = $dbh->prepare($sql);
- my $table_name = $self -> sql_maker -> _quote($table);
- #my $schema_name = $self -> sql_maker -> _quote($schema);
- my $schema_name = uc($schema);
+ # look up the correct sequence automatically
+ my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/;
+ my ($sql, @bind) = $sql_maker->select (
+ 'ALL_TRIGGERS',
+ ['trigger_body'],
+ {
+ $schema ? (owner => $schema) : (),
+ table_name => $table || $source_name,
+ triggering_event => 'INSERT',
+ status => 'ENABLED',
+ },
+ );
+ my $sth = $dbh->prepare($sql);
+ $sth->execute (@bind);
- $sth->execute( $schema_name, $table_name );
- }
- else {
- $sth = $dbh->prepare($sql);
- $sth->execute( $source_name );
- }
while (my ($insert_trigger) = $sth->fetchrow_array) {
return $1 if $insert_trigger =~ m!("?\w+"?)\.nextval!i; # col name goes here???
}
- $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'.");
+ $self->throw_exception("Unable to find a sequence INSERT trigger on table '$source_name'.");
}
sub _sequence_fetch {
my $dbh = $self->_dbh or return 0;
local $dbh->{RaiseError} = 1;
+ local $dbh->{PrintError} = 0;
eval {
- $dbh->do("select 1 from dual");
+ $dbh->do('select 1 from dual');
};
return $@ ? 0 : 1;
$self->throw_exception($exception) if $exception;
- wantarray ? @res : $res[0]
+ $wantarray ? @res : $res[0]
}
=head2 get_autoinc_seq
on_connect_call => 'datetime_setup'
-In L<DBIx::Class::Storage::DBI/connect_info> to set the session nls date, and
-timestamp values for use with L<DBIx::Class::InflateColumn::DateTime> and the
-necessary environment variables for L<DateTime::Format::Oracle>, which is used
-by it.
+In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the session nls
+date, and timestamp values for use with L<DBIx::Class::InflateColumn::DateTime>
+and the necessary environment variables for L<DateTime::Format::Oracle>, which
+is used by it.
Maximum allowable precision is used, unless the environment variables have
already been set.
return $new_alias;
}
+=head2 with_deferred_fk_checks
+
+Runs a coderef between:
+
+ alter session set constraints = deferred
+ ...
+ alter session set constraints = immediate
+
+to defer foreign key checks.
+
+Constraints must be declared C<DEFERRABLE> for this to work.
+
+=cut
+
+sub with_deferred_fk_checks {
+ my ($self, $sub) = @_;
+
+ my $txn_scope_guard = $self->txn_scope_guard;
+
+ $self->_do_query('alter session set constraints = deferred');
+
+ my $sg = Scope::Guard->new(sub {
+ $self->_do_query('alter session set constraints = immediate');
+ });
+
+ return Context::Preserve::preserve_context(sub { $sub->() },
+ after => sub { $txn_scope_guard->commit });
+}
+
+sub _select_args {
+ my ($self, $ident, $select, $where, $attrs) = @_;
+
+ my $connect_by_args = {};
+ if ( $attrs->{connect_by} || $attrs->{start_with} || $attrs->{order_siblings_by} || $attrs->{nocycle} ) {
+ $connect_by_args = {
+ connect_by => $attrs->{connect_by},
+ nocycle => $attrs->{nocycle},
+ start_with => $attrs->{start_with},
+ order_siblings_by => $attrs->{order_siblings_by},
+ }
+ }
+
+ my @rv = $self->next::method($ident, $select, $where, $attrs);
+
+ return (@rv, $connect_by_args);
+}
+
+=head1 ATTRIBUTES
+
+Following additional attributes can be used in resultsets.
+
+=head2 connect_by
+
+=over 4
+
+=item Value: \%connect_by
+
+=back
+
+A hashref of conditions used to specify the relationship between parent rows
+and child rows of the hierarchy.
+
+ connect_by => { parentid => 'prior personid' }
+
+ # adds a connect by statement to the query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY
+ # parentid = prior persionid
+
+=head2 nocycle
+
+=over 4
+
+=item Value: [1|0]
+
+=back
+
+If you want to use NOCYCLE set to 1.
+
+ connect_by => { parentid => 'prior personid' },
+ nocycle => 1
+
+ # adds a connect by statement to the query:
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # CONNECT BY NOCYCLE
+ # parentid = prior persionid
+
+
+=head2 start_with
+
+=over 4
+
+=item Value: \%condition
+
+=back
+
+A hashref of conditions which specify the root row(s) of the hierarchy.
+
+It uses the same syntax as L<DBIx::Class::ResultSet/search>
+
+ start_with => { firstname => 'Foo', lastname => 'Bar' }
+
+ # SELECT
+ # me.persionid me.firstname, me.lastname, me.parentid
+ # FROM
+ # person me
+ # START WITH
+ # firstname = 'foo' and lastname = 'bar'
+ # CONNECT BY
+ # parentid = prior persionid
+
+=head2 order_siblings_by
+
+=over 4
+
+=item Value: ($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>.
projects / dbsrgits/DBIx-Class.git / blobdiff