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::Generic - 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');
=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';
-use base qw/DBIx::Class::Storage::DBI::MultiDistinctEmulation/;
+sub deployment_statements {
+ my $self = shift;;
+ my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_;
-# __PACKAGE__->load_components(qw/PK::Auto/);
+ $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;
+
+ 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, $source, @columns) = @_;
sub _dbh_get_autoinc_seq {
my ($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;
- # trigger_body is a LONG
- $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
-
- my $sth;
-
- # 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);
- $sth->execute( uc($schema), uc($table) );
+ my $source_name;
+ if ( ref $source->name eq 'SCALAR' ) {
+ $source_name = ${$source->name};
}
else {
- $sth = $dbh->prepare($sql);
- $sth->execute( uc( $source->name ) );
+ $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);
+
+ # 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);
+ $sth->execute (@bind);
+
while (my ($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->dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL");
+ my ($id) = $self->_get_dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL");
return $id;
}
-sub connected {
+sub _ping {
my $self = shift;
- if (not $self->SUPER::connected(@_)) {
- return 0;
- }
- else {
- my $dbh = $self->_dbh;
+ my $dbh = $self->_dbh or return 0;
- local $dbh->{RaiseError} = 1;
+ local $dbh->{RaiseError} = 1;
- eval {
- my $ping_sth = $dbh->prepare_cached("select 1 from dual");
- $ping_sth->execute;
- $ping_sth->finish;
- };
+ eval {
+ $dbh->do("select 1 from dual");
+ };
- return $@ ? 0 : 1;
- }
+ return $@ ? 0 : 1;
}
sub _dbh_execute {
my (@res, $exception, $retried);
- do {
- eval {
- if ($wantarray) {
- @res = $self->SUPER::_dbh_execute(@_);
+ RETRY: {
+ do {
+ eval {
+ if ($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 {
- $res[0] = $self->SUPER::_dbh_execute(@_);
+ last RETRY;
}
- };
- $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;
- }
- } while (not $retried++);
+ } while (not $retried++);
+ }
$self->throw_exception($exception) if $exception;
sub get_autoinc_seq {
my ($self, $source, $col) = @_;
-
+
$self->dbh_do('_dbh_get_autoinc_seq', $source, $col);
}
sub columns_info_for {
my ($self, $table) = @_;
- $self->next::method(uc($table));
+ $self->next::method($table);
}
=head2 datetime_parser_type
sub datetime_parser_type { return "DateTime::Format::Oracle"; }
+=head2 connect_call_datetime_setup
+
+Used as:
+
+ 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.
+
+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->dbh->do("SAVEPOINT $name");
+ my ($self, $name) = @_;
+ $self->_get_dbh->do("SAVEPOINT $name");
}
# Oracle automatically releases a savepoint when you start another one with the
sub _svp_release { 1 }
sub _svp_rollback {
- my ($self, $name) = @_;
+ my ($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;
- $self->dbh->do("ROLLBACK TO SAVEPOINT $name")
+ # 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 $new_alias;
}
-=head1 AUTHORS
+=head2 with_deferred_fk_checks
+
+Runs a coderef between:
+
+ alter session set constraints = deferred
+ ...
+ alter session set constraints = immediate
+
+to defer foreign key checks.
+
+Constraints must be declared C<DEFERRABLE> for this to work.
+
+=cut
+
+sub with_deferred_fk_checks {
+ my ($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 });
+}
-Andy Grundman <andy@hybridized.org>
+=head1 AUTHOR
-Scott Connelly <scottsweep@yahoo.com>
+See L<DBIx::Class/CONTRIBUTORS>.
=head1 LICENSE