use base qw/
DBIx::Class::Storage::DBI::Sybase::Base
+ DBIx::Class::Storage::DBI::NoBindVars
/;
use mro 'c3';
-use Carp::Clan qw/^DBIx::Class/;
-use List::Util ();
-
-__PACKAGE__->mk_group_accessors('simple' =>
- qw/_identity _blob_log_on_update auto_cast _insert_txn/
-);
-
-=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)>.
-
-But your queries will be cached.
-
-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->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';
-
-# This is reset to 0 in ::NoBindVars, only necessary because we use max(col) to
-# get the identity.
- $self->_insert_txn(1);
-
- if ($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 $self->placeholders_with_type_conversion_supported) {
- if ($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;
- }
}
-
- $self->set_textsize; # based on LongReadLen in connect_info
-
- } elsif (not $self->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;
- }
-
- $self->_set_max_connect(256);
- }
- }
-}
-
-# 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 (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};
-}
-
-=head2 connect_call_set_auto_cast
-
-In some configurations (usually with L</FreeTDS>) statements with values bound
-to columns or conditions that are not strings will throw implicit type
-conversion errors. For L</FreeTDS> this is automatically detected, and this
-option is set.
-
-It converts placeholders to:
-
- CAST(? as $type)
-
-the type is taken from the L<DBIx::Class::ResultSource/data_type> setting from
-your Result class, and mapped to a Sybase type using a mapping based on
-L<SQL::Translator> if necessary.
-
-This setting can also be set outside of
-L<DBIx::Class::Storage::DBI/connect_info> at any time using:
-
- $schema->storage->auto_cast(1);
-
-=cut
-
-sub connect_call_set_auto_cast {
- my $self = shift;
- $self->auto_cast(1);
-}
-
-sub _is_lob_type {
- my $self = shift;
- my $type = shift;
- $type && $type =~ /(?:text|image|lob|bytea|binary|memo)/i;
-}
-
-# The select-piggybacking-on-insert trick stolen from odbc/mssql
-sub _prep_for_execute {
- my $self = shift;
- my ($op, $extra_bind, $ident, $args) = @_;
-
- my ($sql, $bind) = $self->next::method (@_);
-
-# Some combinations of FreeTDS and Sybase throw implicit conversion errors for
-# all placeeholders, so we convert them into CASTs here.
-# Based on code in ::DBI::NoBindVars .
-#
-# If we're using ::NoBindVars, there are no binds by this point so this code
-# gets skippeed.
- if ($self->auto_cast && @$bind) {
- my $new_sql;
- my @sql_part = split /\?/, $sql;
- my $col_info = $self->_resolve_column_info($ident,[ map $_->[0], @$bind ]);
-
- foreach my $bound (@$bind) {
- my $col = $bound->[0];
- my $syb_type = $self->_syb_base_type($col_info->{$col}{data_type});
-
- foreach my $data (@{$bound}[1..$#$bound]) {
- $new_sql .= shift(@sql_part) .
- ($syb_type ? "CAST(? AS $syb_type)" : '?');
- }
- }
- $new_sql .= join '', @sql_part;
- $sql = $new_sql;
- }
-
- if ($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 =
-"SET IDENTITY_INSERT $table ON\n" .
-"$sql\n" .
-"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, $bind);
-}
-
-# Stolen from SQLT, with some modifications. This will likely change when the
-# SQLT Sybase stuff is redone/fixed-up.
-my %TYPE_MAPPING = (
- number => 'numeric',
- money => 'money',
- varchar => 'varchar',
- varchar2 => 'varchar',
- timestamp => 'datetime',
- text => 'varchar',
- real => 'double precision',
- comment => 'text',
- bit => 'bit',
- tinyint => 'smallint',
- float => 'double precision',
- serial => 'numeric',
- bigserial => 'numeric',
- boolean => 'varchar',
- long => 'varchar',
-);
-
-sub _syb_base_type {
- my ($self, $type) = @_;
-
- $type = lc $type;
- $type =~ s/ identity//;
-
- return uc($TYPE_MAPPING{$type} || $type);
}
-sub _fetch_identity_sql {
- my ($self, $source, $col) = @_;
-
- return "SELECT MAX($col) FROM ".$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) : $rv;
-}
-
-sub last_insert_id { shift->_identity }
-
-# override to handle TEXT/IMAGE and to do a transaction if necessary
-sub insert {
- my ($self, $source, $to_insert) = splice @_, 0, 3;
- my $dbh = $self->_dbh;
-
- my $blob_cols = $self->_remove_blob_cols($source, $to_insert);
-
-# We have to do the insert in a transaction to avoid race conditions with the
-# SELECT MAX(COL) identity method used when placeholders are enabled.
- my $updated_cols = do {
- if ($self->_insert_txn && (not $self->{transaction_depth})) {
- my $args = \@_;
- my $method = $self->next::can;
- $self->txn_do(
- sub { $self->$method($source, $to_insert, @$args) }
- );
- } else {
- $self->next::method($source, $to_insert, @_);
- }
- };
-
- $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols;
-
- return $updated_cols;
-}
-
-sub update {
- my ($self, $source) = splice @_, 0, 2;
- my ($fields, $where) = @_;
- my $wantarray = wantarray;
-
- my $blob_cols = $self->_remove_blob_cols($source, $fields);
-
- my @res;
- if ($wantarray) {
- @res = $self->next::method($source, @_);
- } else {
- $res[0] = $self->next::method($source, @_);
- }
-
- $self->_update_blobs($source, $blob_cols, $where) if %$blob_cols;
-
- return $wantarray ? @res : $res[0];
-}
-
-sub _remove_blob_cols {
- my ($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 \%blob_cols;
-}
-
-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 $rs = $source->resultset->search(
- $where,
- {
- result_class => 'DBIx::Class::ResultClass::HashRefInflator',
- select => \@primary_cols
- }
- );
- @rows = $rs->all; # statement must finish
- }
-
- for my $row (@rows) {
- $self->_insert_blobs($source, $blob_cols, $row);
- }
-}
-
-sub _insert_blobs {
- my ($self, $source, $blob_cols, $row) = @_;
- my $dbh = $self->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) {
- if (@primary_cols == 1) {
- my $col = $primary_cols[0];
- $row{$col} = $self->last_insert_id($source, $col);
- } else {
- 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 = $source->resultset->search(\%where, {
- select => [$col]
- })->cursor;
- $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 ($self->using_freetds) {
- croak
-"TEXT/IMAGE operation failed, probably because you're using FreeTDS: " .
-$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;
- $self->next::method(@_);
- if ($self->using_freetds) {
- $self->dbh->do('BEGIN TRAN');
- }
-}
-
-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->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->dbh->do("ROLLBACK TRANSACTION $name");
+sub _dbh_last_insert_id {
+ my ($self, $dbh, $source, $col) = @_;
+ return ($dbh->selectrow_array('select @@identity'))[0];
}
1;
-=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
-conversion errors for anything that's not expecting a string. In such a case,
-the C<auto_cast> option is automatically set, which you may enable yourself with
-L</connect_call_set_auto_cast> (see the description of that method for more
-details.)
-
-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 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:
+=head1 NAME
- $schema->storage->dbh->do("SET TEXTSIZE $bytes");
+DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
-or
+=head1 SYNOPSIS
- $schema->storage->set_textsize($bytes);
+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>.
-instead.
+=head1 CAVEATS
-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.
+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.
-See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
-setting you need to work with C<IMAGE> columns.
+More importantly this means that caching of prepared statements is explicitly
+disabled, as the interpolation renders it useless.
=head1 AUTHORS
-See L<DBIx::Class/CONTRIBUTORS>.
+Brandon L Black <blblack@gmail.com>
+
+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