use warnings;
use base qw/
- DBIx::Class::Storage::DBI::Sybase::Common
- DBIx::Class::Storage::DBI::AutoCast
+ DBIx::Class::Storage::DBI::Sybase::Base
+ DBIx::Class::Storage::DBI::NoBindVars
/;
use mro 'c3';
-use Carp::Clan qw/^DBIx::Class/;
-use List::Util ();
-use Sub::Name ();
-
-__PACKAGE__->mk_group_accessors('simple' =>
- qw/_identity _blob_log_on_update _writer_storage _is_extra_storage
- _bulk_storage _is_bulk_storage _began_bulk_work
- _bulk_disabled_due_to_coderef_connect_info_warned
- _identity_method/
-);
-
-my @also_proxy_to_extra_storages = qw/
- disconnect _connect_info _sql_maker _sql_maker_opts disable_sth_caching
- auto_savepoint unsafe cursor_class debug debugobj schema
-/;
-
-=head1 NAME
-
-DBIx::Class::Storage::DBI::Sybase - Sybase support for DBIx::Class
-
-=head1 SYNOPSIS
-
-This subclass supports L<DBD::Sybase> for real Sybase databases. If you are
-using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to
-L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>.
-
-=head1 DESCRIPTION
-
-If your version of Sybase does not support placeholders, then your storage
-will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can
-also enable that driver explicitly, see the documentation for more details.
-
-With this driver there is unfortunately no way to get the C<last_insert_id>
-without doing a C<SELECT MAX(col)>. This is done safely in a transaction
-(locking the table.) See L</INSERTS WITH PLACEHOLDERS>.
-
-A recommended L<DBIx::Class::Storage::DBI/connect_info> setting:
-
- on_connect_call => [['datetime_setup'], ['blob_setup', log_on_update => 0]]
-
-=head1 METHODS
-
-=cut
sub _rebless {
- my $self = shift;
+ my $self = shift;
- if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') {
my $dbtype = eval {
- @{$self->_get_dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
- } || '';
-
- my $exception = $@;
- $dbtype =~ s/\W/_/gi;
- my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
-
- if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
- bless $self, $subclass;
- $self->_rebless;
- } else { # real Sybase
- my $no_bind_vars = 'DBIx::Class::Storage::DBI::Sybase::NoBindVars';
-
- if ($self->using_freetds) {
- carp <<'EOF' unless $ENV{DBIC_SYBASE_FREETDS_NOWARN};
-
-You are using FreeTDS with Sybase.
-
-We will do our best to support this configuration, but please consider this
-support experimental.
-
-TEXT/IMAGE columns will definitely not work.
-
-You are encouraged to recompile DBD::Sybase with the Sybase Open Client libraries
-instead.
-
-See perldoc DBIx::Class::Storage::DBI::Sybase for more details.
-
-To turn off this warning set the DBIC_SYBASE_FREETDS_NOWARN environment
-variable.
-EOF
- if (not $self->_typeless_placeholders_supported) {
- if ($self->_placeholders_supported) {
- $self->auto_cast(1);
- } else {
- $self->ensure_class_loaded($no_bind_vars);
- bless $self, $no_bind_vars;
+ @{$self->_get_dbh
+ ->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})
+ }[2]
+ };
+ unless ( $@ ) {
+ $dbtype =~ s/\W/_/gi;
+ my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
+ if ($self->load_optional_class($subclass) && !$self->isa($subclass)) {
+ bless $self, $subclass;
$self->_rebless;
- }
- }
- }
- elsif (not $self->_get_dbh->{syb_dynamic_supported}) {
- # not necessarily FreeTDS, but no placeholders nevertheless
- $self->ensure_class_loaded($no_bind_vars);
- bless $self, $no_bind_vars;
- $self->_rebless;
- } elsif (not $self->_typeless_placeholders_supported) {
- # this is highly unlikely, but we check just in case
- $self->auto_cast(1);
- }
- }
- }
-}
-
-sub _init {
- my $self = shift;
- $self->_set_max_connect(256);
-
- # based on LongReadLen in connect_info
- $self->set_textsize if $self->using_freetds;
-
-# create storage for insert/(update blob) transactions,
-# unless this is that storage
- return if $self->_is_extra_storage;
-
- my $writer_storage = (ref $self)->new;
-
- $writer_storage->_is_extra_storage(1);
- $writer_storage->connect_info($self->connect_info);
-
- $self->_writer_storage($writer_storage);
-
-# create a bulk storage unless connect_info is a coderef
- return
- if (Scalar::Util::reftype($self->_dbi_connect_info->[0])||'') eq 'CODE';
-
- my $bulk_storage = (ref $self)->new;
-
- $bulk_storage->_is_extra_storage(1);
- $bulk_storage->_is_bulk_storage(1); # for special ->disconnect acrobatics
- $bulk_storage->connect_info($self->connect_info);
-
-# this is why
- $bulk_storage->_dbi_connect_info->[0] .= ';bulkLogin=1';
-
- $self->_bulk_storage($bulk_storage);
-}
-
-for my $method (@also_proxy_to_extra_storages) {
- no strict 'refs';
- no warnings 'redefine';
-
- my $replaced = __PACKAGE__->can($method);
-
- *{$method} = Sub::Name::subname $method => sub {
- my $self = shift;
- $self->_writer_storage->$replaced(@_) if $self->_writer_storage;
- $self->_bulk_storage->$replaced(@_) if $self->_bulk_storage;
- return $self->$replaced(@_);
- };
-}
-
-sub disconnect {
- my $self = shift;
-
-# Even though we call $sth->finish for uses off the bulk API, there's still an
-# "active statement" warning on disconnect, which we throw away here.
-# This is due to the bug described in insert_bulk.
-# Currently a noop because 'prepare' is used instead of 'prepare_cached'.
- local $SIG{__WARN__} = sub {
- warn $_[0] unless $_[0] =~ /active statement/i;
- } if $self->_is_bulk_storage;
-
-# so that next transaction gets a dbh
- $self->_began_bulk_work(0) if $self->_is_bulk_storage;
-
- $self->next::method;
-}
-
-# Make sure we have CHAINED mode turned on if AutoCommit is off in non-FreeTDS
-# DBD::Sybase (since we don't know how DBD::Sybase was compiled.) If however
-# we're using FreeTDS, CHAINED mode turns on an implicit transaction which we
-# only want when AutoCommit is off.
-sub _populate_dbh {
- my $self = shift;
-
- $self->next::method(@_);
-
- if ($self->_is_bulk_storage) {
-# this should be cleared on every reconnect
- $self->_began_bulk_work(0);
- return;
- }
-
- if (not $self->using_freetds) {
- $self->_dbh->{syb_chained_txn} = 1;
- } else {
- if ($self->_dbh_autocommit) {
- $self->_dbh->do('SET CHAINED OFF');
- } else {
- $self->_dbh->do('SET CHAINED ON');
- }
- }
-}
-
-=head2 connect_call_blob_setup
-
-Used as:
-
- on_connect_call => [ [ 'blob_setup', log_on_update => 0 ] ]
-
-Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary
-instead of as a hex string.
-
-Recommended.
-
-Also sets the C<log_on_update> value for blob write operations. The default is
-C<1>, but C<0> is better if your database is configured for it.
-
-See
-L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>.
-
-=cut
-
-sub connect_call_blob_setup {
- my $self = shift;
- my %args = @_;
- my $dbh = $self->_dbh;
- $dbh->{syb_binary_images} = 1;
-
- $self->_blob_log_on_update($args{log_on_update})
- if exists $args{log_on_update};
-}
-
-sub _is_lob_type {
- my $self = shift;
- my $type = shift;
- $type && $type =~ /(?:text|image|lob|bytea|binary|memo)/i;
-}
-
-sub _prep_for_execute {
- my $self = shift;
- my ($op, $extra_bind, $ident, $args) = @_;
-
- my ($sql, $bind) = $self->next::method (@_);
-
- if ($op eq 'insert') {
- my $table = $ident->from;
-
- my $bind_info = $self->_resolve_column_info(
- $ident, [map $_->[0], @{$bind}]
- );
- my $identity_col = List::Util::first
- { $bind_info->{$_}{is_auto_increment} }
- (keys %$bind_info)
- ;
-
- if ($identity_col) {
- $sql = join ("\n",
- "SET IDENTITY_INSERT $table ON",
- $sql,
- "SET IDENTITY_INSERT $table OFF",
- );
- }
- else {
- $identity_col = List::Util::first
- { $ident->column_info($_)->{is_auto_increment} }
- $ident->columns
- ;
- }
-
- if ($identity_col) {
- $sql =
- "$sql\n" .
- $self->_fetch_identity_sql($ident, $identity_col);
- }
- }
-
- return ($sql, $bind);
-}
-
-# Stolen from SQLT, with some modifications. This is a makeshift
-# solution before a sane type-mapping library is available, thus
-# the 'our' for easy overrides.
-our %TYPE_MAPPING = (
- number => 'numeric',
- money => 'money',
- varchar => 'varchar',
- varchar2 => 'varchar',
- timestamp => 'datetime',
- text => 'varchar',
- real => 'double precision',
- comment => 'text',
- bit => 'bit',
- tinyint => 'smallint',
- float => 'double precision',
- serial => 'numeric',
- bigserial => 'numeric',
- boolean => 'varchar',
- long => 'varchar',
-);
-
-sub _native_data_type {
- my ($self, $type) = @_;
-
- $type = lc $type;
- $type =~ s/\s* identity//x;
-
- return uc($TYPE_MAPPING{$type} || $type);
-}
-
-sub _fetch_identity_sql {
- my ($self, $source, $col) = @_;
-
- return sprintf ("SELECT MAX(%s) FROM %s",
- map { $self->sql_maker->_quote ($_) } ($col, $source->from)
- );
-}
-
-sub _execute {
- my $self = shift;
- my ($op) = @_;
-
- my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_);
-
- if ($op eq 'insert') {
- $self->_identity($sth->fetchrow_array);
- $sth->finish;
- }
-
- return wantarray ? ($rv, $sth, @bind) : $rv;
-}
-
-sub last_insert_id { shift->_identity }
-
-# handles TEXT/IMAGE and transaction for last_insert_id
-sub insert {
- my $self = shift;
- my ($source, $to_insert) = @_;
-
- my $blob_cols = $self->_remove_blob_cols($source, $to_insert);
-
- my $identity_col = List::Util::first
- { $source->column_info($_)->{is_auto_increment} }
- $source->columns;
-
- # do we need the horrific SELECT MAX(COL) hack?
- my $dumb_last_insert_id =
- $identity_col
- && (not exists $to_insert->{$identity_col})
- && ($self->_identity_method||'') ne '@@IDENTITY';
-
- my $next = $self->next::can;
-
- # we are already in a transaction, or there are no blobs
- # and we don't need the PK - just (try to) do it
- if ($self->{transaction_depth}
- || (!$blob_cols && !$dumb_last_insert_id)
- ) {
- return $self->_insert (
- $next, $source, $to_insert, $blob_cols, $identity_col
- );
- }
-
- # otherwise use the _writer_storage to do the insert+transaction on another
- # connection
- my $guard = $self->_writer_storage->txn_scope_guard;
-
- my $updated_cols = $self->_writer_storage->_insert (
- $next, $source, $to_insert, $blob_cols, $identity_col
- );
-
- $self->_identity($self->_writer_storage->_identity);
-
- $guard->commit;
-
- return $updated_cols;
-}
-
-sub _insert {
- my ($self, $next, $source, $to_insert, $blob_cols, $identity_col) = @_;
-
- my $updated_cols = $self->$next ($source, $to_insert);
-
- my $final_row = {
- $identity_col => $self->last_insert_id($source, $identity_col),
- %$to_insert,
- %$updated_cols,
- };
-
- $self->_insert_blobs ($source, $blob_cols, $final_row) if $blob_cols;
-
- return $updated_cols;
-}
-
-sub update {
- my $self = shift;
- my ($source, $fields, $where) = @_;
-
- my $wantarray = wantarray;
- my $blob_cols = $self->_remove_blob_cols($source, $fields);
-
- if (not $blob_cols) {
- return $self->next::method(@_);
- }
-
-# update+blob update(s) done atomically on separate connection
- $self = $self->_writer_storage;
-
- my $guard = $self->txn_scope_guard;
-
- my @res;
- if ($wantarray) {
- @res = $self->next::method(@_);
- }
- elsif (defined $wantarray) {
- $res[0] = $self->next::method(@_);
- }
- else {
- $self->next::method(@_);
- }
-
- $self->_update_blobs($source, $blob_cols, $where);
-
- $guard->commit;
-
- return $wantarray ? @res : $res[0];
-}
-
-### the insert_bulk partially stolen from DBI/MSSQL.pm
-
-sub _set_identity_insert {
- my ($self, $table) = @_;
-
- my $sql = sprintf (
- 'SET IDENTITY_INSERT %s ON',
- $self->sql_maker->_quote ($table),
- );
-
- my $dbh = $self->_get_dbh;
- eval { $dbh->do ($sql) };
- if ($@) {
- $self->throw_exception (sprintf "Error executing '%s': %s",
- $sql,
- $dbh->errstr,
- );
- }
-}
-
-sub _unset_identity_insert {
- my ($self, $table) = @_;
-
- my $sql = sprintf (
- 'SET IDENTITY_INSERT %s OFF',
- $self->sql_maker->_quote ($table),
- );
-
- my $dbh = $self->_get_dbh;
- $dbh->do ($sql);
-}
-
-## XXX add blob support
-sub insert_bulk {
- my $self = shift;
- my ($source, $cols, $data) = @_;
-
- my $is_identity_insert = (List::Util::first
- { $source->column_info ($_)->{is_auto_increment} } @{$cols}
- ) ? 1 : 0;
-
- my @source_columns = $source->columns;
-
- my $use_bulk_api =
- $self->_bulk_storage &&
- $self->_get_dbh->{syb_has_blk};
-
- if ((not $use_bulk_api) &&
- (Scalar::Util::reftype($self->_dbi_connect_info->[0])||'') eq 'CODE' &&
- (not $self->_bulk_disabled_due_to_coderef_connect_info_warned)) {
- carp <<'EOF';
-Bulk API support disabled due to use of a CODEREF connect_info. Reverting to
-array inserts.
-EOF
- $self->_bulk_disabled_due_to_coderef_connect_info_warned(1);
- }
-
- if (not $use_bulk_api) {
- if ($is_identity_insert) {
- $self->_set_identity_insert ($source->name);
- }
-
- $self->next::method(@_);
-
- if ($is_identity_insert) {
- $self->_unset_identity_insert ($source->name);
- }
-
- return;
- }
-
-# otherwise, use the bulk API
-
-# rearrange @$data so that columns are in database order
- my %orig_idx;
- @orig_idx{@$cols} = 0..$#$cols;
-
- my %new_idx;
- @new_idx{@source_columns} = 0..$#source_columns;
-
- my @new_data;
- for my $datum (@$data) {
- my $new_datum = [];
- for my $col (@source_columns) {
-# identity data will be 'undef' if not $is_identity_insert
-# columns with defaults will also be 'undef'
- $new_datum->[ $new_idx{$col} ] =
- exists $orig_idx{$col} ? $datum->[ $orig_idx{$col} ] : undef;
- }
- push @new_data, $new_datum;
- }
-
- my $identity_col = List::Util::first
- { $source->column_info($_)->{is_auto_increment} } @source_columns;
-
-# bcp identity index is 1-based
- my $identity_idx = exists $new_idx{$identity_col} ?
- $new_idx{$identity_col} + 1 : 0;
-
-## Set a client-side conversion error handler, straight from DBD::Sybase docs.
-# This ignores any data conversion errors detected by the client side libs, as
-# they are usually harmless.
- my $orig_cslib_cb = DBD::Sybase::set_cslib_cb(
- Sub::Name::subname insert_bulk => sub {
- my ($layer, $origin, $severity, $errno, $errmsg, $osmsg, $blkmsg) = @_;
-
- return 1 if $errno == 36;
-
- carp
- "Layer: $layer, Origin: $origin, Severity: $severity, Error: $errno" .
- ($errmsg ? "\n$errmsg" : '') .
- ($osmsg ? "\n$osmsg" : '') .
- ($blkmsg ? "\n$blkmsg" : '');
-
- return 0;
- });
-
- eval {
- my $bulk = $self->_bulk_storage;
-
- my $guard = $bulk->txn_scope_guard;
-
-## XXX get this to work instead of our own $sth
-## will require SQLA or *Hacks changes for ordered columns
-# $bulk->next::method($source, \@source_columns, \@new_data, {
-# syb_bcp_attribs => {
-# identity_flag => $is_identity_insert,
-# identity_column => $identity_idx,
-# }
-# });
- my $sql = 'INSERT INTO ' .
- $bulk->sql_maker->_quote($source->name) . ' (' .
-# colname list is ignored for BCP, but does no harm
- (join ', ', map $bulk->sql_maker->_quote($_), @source_columns) . ') '.
- ' VALUES ('. (join ', ', ('?') x @source_columns) . ')';
-
-## XXX there's a bug in the DBD::Sybase bulk support that makes $sth->finish for
-## a prepare_cached statement ineffective. Replace with ->sth when fixed, or
-## better yet the version above. Should be fixed in DBD::Sybase .
- my $sth = $bulk->_get_dbh->prepare($sql,
-# 'insert', # op
- {
- syb_bcp_attribs => {
- identity_flag => $is_identity_insert,
- identity_column => $identity_idx,
}
- }
- );
-
- my $bind_attributes = $self->source_bind_attributes($source);
-
- foreach my $slice_idx (0..$#source_columns) {
- my $col = $source_columns[$slice_idx];
-
- my $attributes = $bind_attributes->{$col}
- if $bind_attributes && defined $bind_attributes->{$col};
-
- my @slice = map $_->[$slice_idx], @new_data;
-
- $sth->bind_param_array(($slice_idx + 1), \@slice, $attributes);
- }
-
- $bulk->_query_start($sql);
-
-# this is stolen from DBI::insert_bulk
- my $tuple_status = [];
- my $rv = eval { $sth->execute_array({ArrayTupleStatus => $tuple_status}) };
-
- if (my $err = $@ || $sth->errstr) {
- my $i = 0;
- ++$i while $i <= $#$tuple_status && !ref $tuple_status->[$i];
-
- $self->throw_exception("Unexpected populate error: $err")
- if ($i > $#$tuple_status);
-
- require Data::Dumper;
- local $Data::Dumper::Terse = 1;
- local $Data::Dumper::Indent = 1;
- local $Data::Dumper::Useqq = 1;
- local $Data::Dumper::Quotekeys = 0;
- local $Data::Dumper::Sortkeys = 1;
-
- $self->throw_exception(sprintf "%s for populate slice:\n%s",
- ($tuple_status->[$i][1] || $err),
- Data::Dumper::Dumper(
- { map { $source_columns[$_] => $new_data[$i][$_] } (0 .. $#$cols) }
- ),
- );
- }
-
- $guard->commit;
- $sth->finish;
-
- $bulk->_query_end($sql);
- };
- my $exception = $@;
- if ($exception =~ /-Y option/) {
- carp <<"EOF";
-
-Sybase bulk API operation failed due to character set incompatibility, reverting
-to regular array inserts:
-
-*** Try unsetting the LANG environment variable.
-
-$@
-EOF
- $self->_bulk_storage(undef);
- DBD::Sybase::set_cslib_cb($orig_cslib_cb);
- unshift @_, $self;
- goto \&insert_bulk;
- }
- elsif ($exception) {
- DBD::Sybase::set_cslib_cb($orig_cslib_cb);
-# rollback makes the bulkLogin connection unusable
- $self->_bulk_storage->disconnect;
- $self->throw_exception($exception);
- }
-
- DBD::Sybase::set_cslib_cb($orig_cslib_cb);
-}
-
-sub _remove_blob_cols {
- my ($self, $source, $fields) = @_;
-
- my %blob_cols;
-
- for my $col (keys %$fields) {
- if ($self->_is_lob_type($source->column_info($col)->{data_type})) {
- $blob_cols{$col} = delete $fields->{$col};
- $fields->{$col} = \"''";
}
- }
-
- return keys %blob_cols ? \%blob_cols : undef;
-}
-
-sub _update_blobs {
- my ($self, $source, $blob_cols, $where) = @_;
-
- my (@primary_cols) = $source->primary_columns;
-
- croak "Cannot update TEXT/IMAGE column(s) without a primary key"
- unless @primary_cols;
-
-# check if we're updating a single row by PK
- my $pk_cols_in_where = 0;
- for my $col (@primary_cols) {
- $pk_cols_in_where++ if defined $where->{$col};
- }
- my @rows;
-
- if ($pk_cols_in_where == @primary_cols) {
- my %row_to_update;
- @row_to_update{@primary_cols} = @{$where}{@primary_cols};
- @rows = \%row_to_update;
- } else {
- my $cursor = $self->select ($source, \@primary_cols, $where, {});
- @rows = map {
- my %row; @row{@primary_cols} = @$_; \%row
- } $cursor->all;
- }
-
- for my $row (@rows) {
- $self->_insert_blobs($source, $blob_cols, $row);
- }
}
-sub _insert_blobs {
- my ($self, $source, $blob_cols, $row) = @_;
- my $dbh = $self->_get_dbh;
-
- my $table = $source->from;
-
- my %row = %$row;
- my (@primary_cols) = $source->primary_columns;
-
- croak "Cannot update TEXT/IMAGE column(s) without a primary key"
- unless @primary_cols;
-
- if ((grep { defined $row{$_} } @primary_cols) != @primary_cols) {
- croak "Cannot update TEXT/IMAGE column(s) without primary key values";
- }
-
- for my $col (keys %$blob_cols) {
- my $blob = $blob_cols->{$col};
-
- my %where = map { ($_, $row{$_}) } @primary_cols;
-
- my $cursor = $self->select ($source, [$col], \%where, {});
- $cursor->next;
- my $sth = $cursor->sth;
-
- eval {
- do {
- $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr;
- } while $sth->fetch;
-
- $sth->func('ct_prepare_send') or die $sth->errstr;
-
- my $log_on_update = $self->_blob_log_on_update;
- $log_on_update = 1 if not defined $log_on_update;
-
- $sth->func('CS_SET', 1, {
- total_txtlen => length($blob),
- log_on_update => $log_on_update
- }, 'ct_data_info') or die $sth->errstr;
-
- $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr;
-
- $sth->func('ct_finish_send') or die $sth->errstr;
- };
- my $exception = $@;
- $sth->finish if $sth;
- if ($exception) {
- if ($self->using_freetds) {
- croak (
- 'TEXT/IMAGE operation failed, probably because you are using FreeTDS: '
- . $exception
- );
- } else {
- croak $exception;
- }
- }
- }
-}
-
-=head2 connect_call_datetime_setup
-
-Used as:
-
- on_connect_call => 'datetime_setup'
-
-In L<DBIx::Class::Storage::DBI/connect_info> to set:
-
- $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z
- $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080
-
-On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using
-L<DateTime::Format::Sybase>, which you will need to install.
-
-This works for both C<DATETIME> and C<SMALLDATETIME> columns, although
-C<SMALLDATETIME> columns only have minute precision.
-
-=cut
-
-{
- my $old_dbd_warned = 0;
-
- sub connect_call_datetime_setup {
- my $self = shift;
- my $dbh = $self->_dbh;
-
- if ($dbh->can('syb_date_fmt')) {
- # amazingly, this works with FreeTDS
- $dbh->syb_date_fmt('ISO_strict');
- } elsif (not $old_dbd_warned) {
- carp "Your DBD::Sybase is too old to support ".
- "DBIx::Class::InflateColumn::DateTime, please upgrade!";
- $old_dbd_warned = 1;
- }
-
- $dbh->do('SET DATEFORMAT mdy');
-
- 1;
- }
-}
-
-sub datetime_parser_type { "DateTime::Format::Sybase" }
-
-# ->begin_work and such have no effect with FreeTDS but we run them anyway to
-# let the DBD keep any state it needs to.
-#
-# If they ever do start working, the extra statements will do no harm (because
-# Sybase supports nested transactions.)
-
-sub _dbh_begin_work {
- my $self = shift;
-
-# bulkLogin=1 connections are always in a transaction, and can only call BEGIN
-# TRAN once. However, we need to make sure there's a $dbh.
- return if $self->_is_bulk_storage && $self->_dbh && $self->_began_bulk_work;
-
- $self->next::method(@_);
-
- if ($self->using_freetds) {
- $self->_get_dbh->do('BEGIN TRAN');
- }
-
- $self->_began_bulk_work(1) if $self->_is_bulk_storage;
-}
-
-sub _dbh_commit {
- my $self = shift;
- if ($self->using_freetds) {
- $self->_dbh->do('COMMIT');
- }
- return $self->next::method(@_);
-}
-
-sub _dbh_rollback {
- my $self = shift;
- if ($self->using_freetds) {
- $self->_dbh->do('ROLLBACK');
- }
- return $self->next::method(@_);
-}
-
-# savepoint support using ASE syntax
-
-sub _svp_begin {
- my ($self, $name) = @_;
-
- $self->_get_dbh->do("SAVE TRANSACTION $name");
-}
-
-# A new SAVE TRANSACTION with the same name releases the previous one.
-sub _svp_release { 1 }
-
-sub _svp_rollback {
- my ($self, $name) = @_;
-
- $self->_get_dbh->do("ROLLBACK TRANSACTION $name");
+sub _dbh_last_insert_id {
+ my ($self, $dbh, $source, $col) = @_;
+ return ($dbh->selectrow_array('select @@identity'))[0];
}
1;
-=head1 Schema::Loader Support
-
-There is an experimental branch of L<DBIx::Class::Schema::Loader> that will
-allow you to dump a schema from most (if not all) versions of Sybase.
-
-It is available via subversion from:
-
- http://dev.catalyst.perl.org/repos/bast/branches/DBIx-Class-Schema-Loader/current/
-
-=head1 FreeTDS
-
-This driver supports L<DBD::Sybase> compiled against FreeTDS
-(L<http://www.freetds.org/>) to the best of our ability, however it is
-recommended that you recompile L<DBD::Sybase> against the Sybase Open Client
-libraries. They are a part of the Sybase ASE distribution:
-
-The Open Client FAQ is here:
-L<http://www.isug.com/Sybase_FAQ/ASE/section7.html>.
-
-Sybase ASE for Linux (which comes with the Open Client libraries) may be
-downloaded here: L<http://response.sybase.com/forms/ASE_Linux_Download>.
-
-To see if you're using FreeTDS check C<< $schema->storage->using_freetds >>, or run:
-
- perl -MDBI -le 'my $dbh = DBI->connect($dsn, $user, $pass); print $dbh->{syb_oc_version}'
-
-Some versions of the libraries involved will not support placeholders, in which
-case the storage will be reblessed to
-L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>.
-
-In some configurations, placeholders will work but will throw implicit type
-conversion errors for anything that's not expecting a string. In such a case,
-the C<auto_cast> option from L<DBIx::Class::Storage::DBI::AutoCast> is
-automatically set, which you may enable on connection with
-L<DBIx::Class::Storage::DBI::AutoCast/connect_call_set_auto_cast>. The type info
-for the C<CAST>s is taken from the L<DBIx::Class::ResultSource/data_type>
-definitions in your Result classes, and are mapped to a Sybase type (if it isn't
-already) using a mapping based on L<SQL::Translator>.
-
-In other configurations, placeholers will work just as they do with the Sybase
-Open Client libraries.
-
-Inserts or updates of TEXT/IMAGE columns will B<NOT> work with FreeTDS.
-
-=head1 INSERTS WITH PLACEHOLDERS
-
-With placeholders enabled, inserts are done in a transaction so that there are
-no concurrency issues with getting the inserted identity value using
-C<SELECT MAX(col)>, which is the only way to get the C<IDENTITY> value in this
-mode.
-
-In addition, they are done on a separate connection so that it's possible to
-have active cursors when doing an insert.
-
-When using C<DBIx::Class::Storage::DBI::Sybase::NoBindVars> transactions are
-disabled, as there are no concurrency issues with C<SELECT @@IDENTITY> as it's a
-session variable.
-
-=head1 TRANSACTIONS
-
-Due to limitations of the TDS protocol, L<DBD::Sybase>, or both; you cannot
-begin a transaction while there are active cursors. An active cursor is, for
-example, a L<ResultSet|DBIx::Class::ResultSet> that has been executed using
-C<next> or C<first> but has not been exhausted or
-L<reset|DBIx::Class::ResultSet/reset>.
-
-For example, this will not work:
-
- $schema->txn_do(sub {
- my $rs = $schema->resultset('Book');
- while (my $row = $rs->next) {
- $schema->resultset('MetaData')->create({
- book_id => $row->id,
- ...
- });
- }
- });
-
-Transactions done for inserts in C<AutoCommit> mode when placeholders are in use
-are not affected, as they are done on an extra database handle.
-
-Some workarounds:
-
-=over 4
-
-=item * use L<DBIx::Class::Storage::DBI::Replicated>
-
-=item * L<connect|DBIx::Class::Schema/connect> another L<Schema|DBIx::Class::Schema>
-
-=item * load the data from your cursor with L<DBIx::Class::ResultSet/all>
-
-=back
-
-=head1 MAXIMUM CONNECTIONS
-
-The TDS protocol makes separate connections to the server for active statements
-in the background. By default the number of such connections is limited to 25,
-on both the client side and the server side.
-
-This is a bit too low for a complex L<DBIx::Class> application, so on connection
-the client side setting is set to C<256> (see L<DBD::Sybase/maxConnect>.) You
-can override it to whatever setting you like in the DSN.
-
-See
-L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm>
-for information on changing the setting on the server side.
-
-=head1 DATES
-
-See L</connect_call_datetime_setup> to setup date formats
-for L<DBIx::Class::InflateColumn::DateTime>.
-
-=head1 TEXT/IMAGE COLUMNS
-
-L<DBD::Sybase> compiled with FreeTDS will B<NOT> allow you to insert or update
-C<TEXT/IMAGE> columns.
-
-Setting C<< $dbh->{LongReadLen} >> will also not work with FreeTDS use either:
-
- $schema->storage->dbh->do("SET TEXTSIZE $bytes");
-
-or
-
- $schema->storage->set_textsize($bytes);
-
-instead.
-
-However, the C<LongReadLen> you pass in
-L<DBIx::Class::Storage::DBI/connect_info> is used to execute the equivalent
-C<SET TEXTSIZE> command on connection.
+=head1 NAME
-See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
-setting you need to work with C<IMAGE> columns.
+DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
-=head1 BULK API
+=head1 SYNOPSIS
-The experimental L<DBD::Sybase> Bulk API support is used for
-L<populate|DBIx::Class::ResultSet/populate> in B<void> context, in a transaction
-on a separate connection.
+This subclass supports L<DBD::Sybase> for real Sybase databases. If
+you are using an MSSQL database via L<DBD::Sybase>, see
+L<DBIx::Class::Storage::DBI::Sybase::MSSQL>.
-To use this feature effectively, use a large number of rows for each
-L<populate|DBIx::Class::ResultSet/populate> call, eg.:
+=head1 CAVEATS
- while (my $rows = $data_source->get_100_rows()) {
- $rs->populate($rows);
- }
+This storage driver uses L<DBIx::Class::Storage::DBI::NoBindVars> as a base.
+This means that bind variables will be interpolated (properly quoted of course)
+into the SQL query itself, without using bind placeholders.
-B<NOTE:> the L<add_columns|DBIx::Class::ResultSource/add_columns>
-calls in your C<Result> classes B<must> list columns in database order for this
-to work. Also, you may have to unset the C<LANG> environment variable before
-loading your app, if it doesn't match the character set of your database.
+More importantly this means that caching of prepared statements is explicitly
+disabled, as the interpolation renders it useless.
-When inserting IMAGE columns using this method, you'll need to use
-L</connect_call_blob_setup> as well.
+=head1 AUTHORS
-=head1 AUTHOR
+Brandon L Black <blblack@gmail.com>
-See L<DBIx::Class/CONTRIBUTORS>.
+Justin Hunter <justin.d.hunter@gmail.com>
=head1 LICENSE
You may distribute this code under the same terms as Perl itself.
=cut
-# vim:sts=2 sw=2:
projects / dbsrgits/DBIx-Class.git / blobdiff