=head1 NAME
-DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
+DBIx::Class::Storage::DBI::Sybase - Sybase support for DBIx::Class
=head1 SYNOPSIS
But your queries will be cached.
-A recommended L<DBIx::Class::Storage::DBI/connect_info> settings:
+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>.
- on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]]
+A recommended L<DBIx::Class::Storage::DBI/connect_info> setting:
+
+ on_connect_call => [['datetime_setup'], ['blob_setup', log_on_update => 0]]
=head1 METHODS
if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
bless $self, $subclass;
$self->_rebless;
- } else {
- # 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}) {
- $self->ensure_class_loaded('DBIx::Class::Storage::DBI::Sybase::NoBindVars');
- 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;
}
}
}
+sub _using_freetds {
+ my $self = shift;
+
+ return $self->_dbh->{syb_oc_version} =~ /freetds/i;
+}
+
+sub _set_maxConnect {
+ my $self = shift;
+
+ 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 ] ]
+ 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.
sub _is_lob_type {
my $self = shift;
- shift =~ /(?:text|image|lob|bytea|binary)/i;
+ 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, $col;
+# }
+# }
+#
+# croak "cannot select more than a one TEXT/IMAGE column at a time"
+# if @blobs > 1;
+#
+# return (@non_blobs, @blobs);
+#}
+
+# override to handle TEXT/IMAGE
sub insert {
my ($self, $source, $to_insert) = splice @_, 0, 3;
my $updated_cols = $self->next::method($source, $to_insert, @_);
- $self->_update_blobs($source, $blob_cols, $to_insert) if %$blob_cols;
+ $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols;
return $updated_cols;
}
-#sub update {
-# my ($self, $source) = splice @_, 0, 2;
-# my ($fields) = @_;
-#
-# my $blob_cols = $self->_remove_blob_cols($source, $fields);
-#
-# my @res = 1;
-#
-# if (%$fields) {
-# if (wantarray) {
-# @res = $self->next::method($source, @_);
-# } else {
-# $res[0] = $self->next::method($source, @_);
-# }
-# }
-#
-# $self->_update_blobs($source, $blob_cols, $fields) if %$blob_cols;
-#
-# return wantarray ? @res : $res[0];
-#}
+sub update {
+ my ($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) {
- $blob_cols{$col} = delete $fields->{$col}
- if $self->_is_lob_type($source->column_info($col)->{data_type});
+ if ($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, $inserted) = @_;
+ my ($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 without a primary key!"
+ croak "Cannot update TEXT/IMAGE column(s) without a primary key"
unless @primary_cols;
- my $search_cond = join ',' => map "$_ = ?", @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;
-# First update to empty string in case it's NULL, can't update a NULL blob using
-# the API.
- my $sth = $dbh->prepare_cached(
- qq{update $table set $col = '' where $search_cond}
- );
- $sth->execute(map $inserted->{$_}, @primary_cols) or die $sth->errstr;
- $sth->finish;
+ if (not $self->isa('DBIx::Class::Storage::DBI::NoBindVars')) {
+ my $search_cond = join ',' => map "$_ = ?", @primary_cols;
- $sth = $dbh->prepare_cached(
- "select $col from $table where $search_cond"
- );
- $sth->execute(map $inserted->{$_}, @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) {
my ($self, $dbh, $source, $col) = @_;
# sorry, there's no other way!
- my $sth = $dbh->prepare_cached("select max($col) from ".$source->from);
- return ($dbh->selectrow_array($sth))[0];
+ my $sth = $self->sth("select max($col) from ".$source->from);
+ my ($id) = $dbh->selectrow_array($sth);
+ $sth->finish;
+
+ return $id;
}
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
See L</connect_call_datetime_setup> to setup date formats
=head1 IMAGE AND TEXT COLUMNS
+L<DBD::Sybase> compiled with FreeTDS will B<NOT> work with C<TEXT/IMAGE>
+columns.
+
See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
setting you need to work with C<IMAGE> columns.
-Due to limitations in L<DBD::Sybase> and this driver, it is only possible to
-select one C<TEXT> or C<IMAGE> column at a time.
-
=head1 AUTHORS
See L<DBIx::Class/CONTRIBUTORS>.
projects / dbsrgits/DBIx-Class.git / blobdiff