use strict;
use warnings;
-use base qw/DBIx::Class::Storage::DBI/;
+use base qw/
+ DBIx::Class::Storage::DBI::Sybase::Base
+ DBIx::Class::Storage::DBI
+/;
+use mro 'c3';
+use Carp::Clan qw/^DBIx::Class/;
+use List::Util ();
+
+__PACKAGE__->mk_group_accessors('simple' =>
+ qw/_identity _blob_log_on_update/
+);
+
+=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.
+
+You need a version of L<DBD::Sybase> compiled with the Sybase OpenClient
+libraries, B<NOT> FreeTDS, for placeholder support. Otherwise your storage will
+be automatically reblessed into C<::NoBindVars>.
+
+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 $self = shift;
if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
bless $self, $subclass;
$self->_rebless;
- } else { # probably real Sybase
+ } else { # real Sybase
+ my $no_bind_vars = 'DBIx::Class::Storage::DBI::Sybase::NoBindVars';
+
+ if ($self->_using_freetds) {
+ carp <<'EOF';
+
+Your version of Sybase potentially supports placeholders and query caching,
+however you seem to be using FreeTDS which does not (yet?) support this.
+
+Please recompile DBD::Sybase with the Sybase OpenClient libraries if you want
+these features.
+
+TEXT/IMAGE column support will also not work under FreeTDS.
+
+See perldoc DBIx::Class::Storage::DBI::Sybase for more details.
+EOF
+ $self->ensure_class_loaded($no_bind_vars);
+ bless $self, $no_bind_vars;
+ $self->_rebless;
+ }
+
if (not $self->dbh->{syb_dynamic_supported}) {
- bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars';
+ $self->ensure_class_loaded($no_bind_vars);
+ bless $self, $no_bind_vars;
$self->_rebless;
}
+
+ $self->_set_maxConnect;
+ }
+ }
+}
+
+# Make sure we have CHAINED mode turned on, we don't know how DBD::Sybase was
+# compiled.
+sub _populate_dbh {
+ my $self = shift;
+ $self->next::method(@_);
+ $self->_dbh->{syb_chained_txn} = 1;
+}
+
+sub _using_freetds {
+ my $self = shift;
+
+ return $self->_dbh->{syb_oc_version} =~ /freetds/i;
+}
+
+sub _set_maxConnect {
+ my $self = shift;
- $self->dbh->syb_date_fmt('ISO_strict');
- $self->dbh->do('set dateformat mdy');
+ my $dsn = $self->_dbi_connect_info->[0];
+
+ return if ref($dsn) eq 'CODE';
+
+ if ($dsn !~ /maxConnect=/) {
+ $self->_dbi_connect_info->[0] = "$dsn;maxConnect=256";
+ my $connected = defined $self->_dbh;
+ $self->disconnect;
+ $self->ensure_connected if $connected;
+ }
+}
+
+=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 && $type =~ /(?:text|image|lob|bytea|binary|memo)/i;
+}
+
+## This will be useful if we ever implement BLOB filehandle inflation and will
+## need to use the API, but for now it isn't.
+#
+#sub order_columns_for_select {
+# my ($self, $source, $columns) = @_;
+#
+# my (@non_blobs, @blobs);
+#
+# for my $col (@$columns) {
+# if ($self->_is_lob_type($source->column_info($col)->{data_type})) {
+# push @blobs, $col;
+# } else {
+# push @non_blobs, $col;
+# }
+# }
+#
+# croak "cannot select more than a one TEXT/IMAGE column at a time"
+# if @blobs > 1;
+#
+# return (@non_blobs, @blobs);
+#}
+
+# 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) = $self->next::method (@_);
+
+ if ($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, $identity_col) . "\n";
}
}
+
+ return ($sql, $bind);
+}
+
+sub _fetch_identity_sql {
+ my ($self, $source, $col) = @_;
+
+ return "SELECT MAX($col) FROM ".$source->from;
}
-sub _dbh_last_insert_id {
- my ($self, $dbh, $source, $col) = @_;
+sub _execute {
+ my $self = shift;
+ my ($op) = @_;
+
+ my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_);
- if (not $self->dbh->{syb_dynamic_supported}) {
- # @@identity works only if not using placeholders
- # Should this query be cached?
- return ($dbh->selectrow_array('select @@identity'))[0];
+ if ($op eq 'insert') {
+ $self->_identity($sth->fetchrow_array);
+ $sth->finish;
}
- # sorry, there's no other way!
- my $sth = $dbh->prepare_cached("select max($col) from ".$source->from);
- return ($dbh->selectrow_array($sth))[0];
+ return wantarray ? ($rv, $sth, @bind) : $rv;
}
-sub datetime_parser_type { "DBIx::Class::Storage::DBI::Sybase::DateTime" }
+sub last_insert_id { shift->_identity }
-1;
+# override to handle TEXT/IMAGE and nested txn
+sub insert {
+ my ($self, $source, $to_insert) = splice @_, 0, 3;
+ my $dbh = $self->_dbh;
-=head1 NAME
+ my $blob_cols = $self->_remove_blob_cols($source, $to_insert);
-DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
+# Sybase has nested transactions fortunately, because 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 {
+ local $self->{auto_savepoint} = 1;
+ my $args = \@_;
+ my $method = $self->next::can;
+ $self->txn_do(
+ sub { $self->$method($source, $to_insert, @$args) }
+ );
+ };
-=head1 SYNOPSIS
+ $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols;
-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>.
+ return $updated_cols;
+}
-=head1 CAVEATS
+sub update {
+ my ($self, $source) = splice @_, 0, 2;
+ my ($fields, $where) = @_;
+ my $wantarray = wantarray;
-If your version of Sybase does not support placeholders, then this storage
-driver uses L<DBIx::Class::Storage::DBI::NoBindVars> as a base,
+ my $blob_cols = $self->_remove_blob_cols($source, $fields);
-In which case, bind variables will be interpolated (properly quoted of course)
-into the SQL query itself, without using bind placeholders.
+ my @res;
+ if ($wantarray) {
+ @res = $self->next::method($source, @_);
+ } else {
+ $res[0] = $self->next::method($source, @_);
+ }
-More importantly this means that caching of prepared statements is explicitly
-disabled, as the interpolation renders it useless.
+ $self->_update_blobs($source, $blob_cols, $where) if %$blob_cols;
-If your version of Sybase B<DOES> support placeholders (check
-C<<$dbh->{syb_dynamic_supported}>> then unfortunately there's no way to get the
-C<last_insert_id> without doing a C<select max(col)>.
+ return $wantarray ? @res : $res[0];
+}
-But your queries will be cached.
+sub _remove_blob_cols {
+ my ($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 $sth;
+
+ if (not $self->isa('DBIx::Class::Storage::DBI::NoBindVars')) {
+ my $search_cond = join ',' => map "$_ = ?", @primary_cols;
+
+ $sth = $self->sth(
+ "select $col from $table where $search_cond"
+ );
+ $sth->execute(map $row{$_}, @primary_cols);
+ } else {
+ my $search_cond = join ',' => map "$_ = $row{$_}", @primary_cols;
+
+ $sth = $dbh->prepare(
+ "select $col from $table where $search_cond"
+ );
+ $sth->execute;
+ }
+
+ eval {
+ while ($sth->fetch) {
+ $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr;
+ }
+ $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;
+ croak $exception if $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')) {
+ $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;
+ }
+
+ $dbh->do('set dateformat mdy');
+
+ 1;
+ }
+}
+
+sub datetime_parser_type { "DateTime::Format::Sybase" }
+
+# savepoint support using ASE syntax
+
+sub _svp_begin {
+ my ($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");
+}
+
+1;
+
+=head1 MAXIMUM CONNECTIONS
+
+L<DBD::Sybase> 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, so on connection the clientside 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
-On connection C<syb_date_fmt> is set to C<ISO_strict>, e.g.:
-C<2004-08-21T14:36:48.080Z> and C<dateformat> is set to C<mdy>, e.g.:
-C<08/13/1979>.
+See L</connect_call_datetime_setup> to setup date formats
+for L<DBIx::Class::InflateColumn::DateTime>.
-You will need the L<DateTime::Format::Strptime> module if you are going to use
-L<DBIx::Class::InflateColumn::DateTime>.
+=head1 IMAGE AND TEXT COLUMNS
-=head1 AUTHORS
+L<DBD::Sybase> compiled with FreeTDS will B<NOT> work with C<TEXT/IMAGE>
+columns.
-Brandon L Black <blblack@gmail.com>
+See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
+setting you need to work with C<IMAGE> columns.
-Justin Hunter <justin.d.hunter@gmail.com>
+=head1 AUTHORS
-Rafael Kitover <rkitover@cpan.org>
+See L<DBIx::Class/CONTRIBUTORS>.
=head1 LICENSE
projects / dbsrgits/DBIx-Class.git / blobdiff