package DBIx::Class::Storage::DBI::Oracle::Generic;
-# -*- mode: cperl; cperl-indent-level: 2 -*-
use strict;
use warnings;
+use Scope::Guard ();
+use Context::Preserve ();
=head1 NAME
-DBIx::Class::Storage::DBI::Oracle - Automatic primary key class for Oracle
+DBIx::Class::Storage::DBI::Oracle::Generic - Oracle Support for DBIx::Class
=head1 SYNOPSIS
- # In your table classes
- __PACKAGE__->load_components(qw/PK::Auto Core/);
+ # In your result (table) classes
+ use base 'DBIx::Class::Core';
+ __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } });
__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 autoincrements for Oracle.
+This class implements base Oracle support. The subclass
+L<DBIx::Class::Storage::DBI::Oracle::WhereJoins> is for C<(+)> joins in Oracle
+versions before 9.
=head1 METHODS
=cut
-use Carp::Clan qw/^DBIx::Class/;
+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) = @_;
-use base qw/DBIx::Class::Storage::DBI::MultiDistinctEmulation/;
+ $sqltargs ||= {};
+ 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;
-# __PACKAGE__->load_components(qw/PK::Auto/);
+ my $oracle_version = eval { $self->_get_dbh->get_info(18) };
+
+ $sqltargs->{producer_args}{oracle_version} = $oracle_version;
+
+ $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
+}
sub _dbh_last_insert_id {
- my ($self, $dbh, $source, $col) = @_;
- my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
- my $sql = 'SELECT ' . $seq . '.currval FROM DUAL';
- my ($id) = $dbh->selectrow_array($sql);
- return $id;
+ my ($self, $dbh, $source, @columns) = @_;
+ my @ids = ();
+ foreach my $col (@columns) {
+ my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
+ my $id = $self->_sequence_fetch( 'currval', $seq );
+ push @ids, $id;
+ }
+ return @ids;
}
sub _dbh_get_autoinc_seq {
my ($self, $dbh, $source, $col) = @_;
- # 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 $sql_maker = $self->sql_maker;
+
+ 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
- $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
+ local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
+
+ # disable default bindtype
+ local $sql_maker->{bindtype} = 'normal';
+ # 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);
- $sth->execute( uc($source->name) );
+ $sth->execute (@bind);
+
while (my ($insert_trigger) = $sth->fetchrow_array) {
- return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here???
+ 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 ( $self, $type, $seq ) = @_;
+ my ($id) = $self->_get_dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL");
+ return $id;
+}
+
+sub _ping {
+ my $self = shift;
+
+ my $dbh = $self->_dbh or return 0;
+
+ local $dbh->{RaiseError} = 1;
+ local $dbh->{PrintError} = 0;
+
+ eval {
+ $dbh->do('select 1 from dual');
+ };
+
+ return $@ ? 0 : 1;
+}
+
+sub _dbh_execute {
+ my $self = shift;
+ my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
+
+ my $wantarray = wantarray;
+
+ my (@res, $exception, $retried);
+
+ RETRY: {
+ do {
+ eval {
+ if ($wantarray) {
+ @res = $self->next::method(@_);
+ } else {
+ $res[0] = $self->next::method(@_);
+ }
+ };
+ $exception = $@;
+ if ($exception =~ /ORA-01003/) {
+ # ORA-01003: no statement parsed (someone changed the table somehow,
+ # invalidating your cursor.)
+ my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args);
+ delete $dbh->{CachedKids}{$sql};
+ } else {
+ last RETRY;
+ }
+ } while (not $retried++);
+ }
+
+ $self->throw_exception($exception) if $exception;
+
+ $wantarray ? @res : $res[0]
}
=head2 get_autoinc_seq
sub get_autoinc_seq {
my ($self, $source, $col) = @_;
-
- $self->dbh_do($self->can('_dbh_get_autoinc_seq'), $source, $col);
+
+ $self->dbh_do('_dbh_get_autoinc_seq', $source, $col);
}
=head2 columns_info_for
sub columns_info_for {
my ($self, $table) = @_;
- $self->next::method(uc($table));
+ $self->next::method($table);
}
=head2 datetime_parser_type
sub datetime_parser_type { return "DateTime::Format::Oracle"; }
-=head1 AUTHORS
+=head2 connect_call_datetime_setup
+
+Used as:
+
+ on_connect_call => 'datetime_setup'
+
+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.
+
+These are the defaults used:
+
+ $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS';
+ $ENV{NLS_TIMESTAMP_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF';
+ $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM';
+
+To get more than second precision with L<DBIx::Class::InflateColumn::DateTime>
+for your timestamps, use something like this:
+
+ use Time::HiRes 'time';
+ my $ts = DateTime->from_epoch(epoch => time);
+
+=cut
+
+sub connect_call_datetime_setup {
+ my $self = shift;
+
+ my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS';
+ my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||=
+ 'YYYY-MM-DD HH24:MI:SS.FF';
+ my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||=
+ 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM';
+
+ $self->_do_query(
+ "alter session set nls_date_format = '$date_format'"
+ );
+ $self->_do_query(
+ "alter session set nls_timestamp_format = '$timestamp_format'"
+ );
+ $self->_do_query(
+ "alter session set nls_timestamp_tz_format='$timestamp_tz_format'"
+ );
+}
+
+=head2 source_bind_attributes
+
+Handle LOB types in Oracle. Under a certain size (4k?), you can get away
+with the driver assuming your input is the deprecated LONG type if you
+encode it as a hex string. That ain't gonna fly at larger values, where
+you'll discover you have to do what this does.
+
+This method had to be overridden because we need to set ora_field to the
+actual column, and that isn't passed to the call (provided by Storage) to
+bind_attribute_by_data_type.
+
+According to L<DBD::Oracle>, the ora_field isn't always necessary, but
+adding it doesn't hurt, and will save your bacon if you're modifying a
+table with more than one LOB column.
+
+=cut
+
+sub source_bind_attributes
+{
+ require DBD::Oracle;
+ my $self = shift;
+ my($source) = @_;
+
+ my %bind_attributes;
+
+ foreach my $column ($source->columns) {
+ my $data_type = $source->column_info($column)->{data_type} || '';
+ next unless $data_type;
+
+ my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type);
+
+ if ($data_type =~ /^[BC]LOB$/i) {
+ if ($DBD::Oracle::VERSION eq '1.23') {
+ $self->throw_exception(
+"BLOB/CLOB support in DBD::Oracle == 1.23 is broken, use an earlier or later ".
+"version.\n\nSee: https://rt.cpan.org/Public/Bug/Display.html?id=46016\n"
+ );
+ }
+
+ $column_bind_attrs{'ora_type'} = uc($data_type) eq 'CLOB'
+ ? DBD::Oracle::ORA_CLOB()
+ : DBD::Oracle::ORA_BLOB()
+ ;
+ $column_bind_attrs{'ora_field'} = $column;
+ }
+
+ $bind_attributes{$column} = \%column_bind_attrs;
+ }
+
+ return \%bind_attributes;
+}
+
+sub _svp_begin {
+ my ($self, $name) = @_;
+ $self->_get_dbh->do("SAVEPOINT $name");
+}
+
+# Oracle automatically releases a savepoint when you start another one with the
+# same name.
+sub _svp_release { 1 }
+
+sub _svp_rollback {
+ my ($self, $name) = @_;
+ $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name")
+}
+
+=head2 relname_to_table_alias
+
+L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in
+queries.
+
+Unfortunately, Oracle doesn't support identifiers over 30 chars in length, so
+the L<DBIx::Class::Relationship> name is shortened and appended with half of an
+MD5 hash.
+
+See L<DBIx::Class::Storage/"relname_to_table_alias">.
+
+=cut
+
+sub relname_to_table_alias {
+ my $self = shift;
+ my ($relname, $join_count) = @_;
+
+ my $alias = $self->next::method(@_);
+
+ return $alias if length($alias) <= 30;
+
+ # get a base64 md5 of the alias with join_count
+ require Digest::MD5;
+ my $ctx = Digest::MD5->new;
+ $ctx->add($alias);
+ my $md5 = $ctx->b64digest;
+
+ # remove alignment mark just in case
+ $md5 =~ s/=*\z//;
+
+ # truncate and prepend to truncated relname without vowels
+ (my $devoweled = $relname) =~ s/[aeiou]//g;
+ my $shortened = substr($devoweled, 0, 18);
+
+ my $new_alias =
+ $shortened . '_' . substr($md5, 0, 30 - length($shortened) - 1);
+
+ 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
-Andy Grundman <andy@hybridized.org>
+=head1 AUTHOR
-Scott Connelly <scottsweep@yahoo.com>
+See L<DBIx::Class/CONTRIBUTORS>.
=head1 LICENSE