use warnings;
use base qw/
- DBIx::Class::Storage::DBI::Sybase::Base
+ DBIx::Class::Storage::DBI::Sybase::Common
+ DBIx::Class::Storage::DBI::AutoCast
/;
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 auto_cast _insert_txn/
+ 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/
+ connect_call_set_auto_cast auto_cast connect_call_blob_setup
+ connect_call_datetime_setup
+
+ 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
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.
+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:
if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') {
my $dbtype = eval {
- @{$self->last_dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
+ @{$self->_get_dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
} || '';
my $exception = $@;
} 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};
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) {
+ if (not $self->_typeless_placeholders_supported) {
+ if ($self->_placeholders_supported) {
$self->auto_cast(1);
} else {
$self->ensure_class_loaded($no_bind_vars);
$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
+ }
+ 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);
}
-
- $self->_set_max_connect(256);
}
}
}
+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);
+ $writer_storage->auto_cast($self->auto_cast);
+
+ $self->_writer_storage($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
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;
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 && $type =~ /(?:text|image|lob|bytea|binary|memo)/i;
}
-# The select-piggybacking-on-insert trick stolen from odbc/mssql
+sub _is_lob_column {
+ my ($self, $source, $column) = @_;
+
+ return $self->_is_lob_type($source->column_info($column)->{data_type});
+}
+
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 $table = Scalar::Util::blessed($ident) ? $ident->from : $ident;
+
+ my $bind_info = $self->_resolve_column_info(
+ $ident, [map $_->[0], @{$bind}]
+ );
+ my $bound_identity_col = List::Util::first
+ { $bind_info->{$_}{is_auto_increment} }
+ (keys %$bind_info)
+ ;
+ my $identity_col = Scalar::Util::blessed($ident) &&
+ List::Util::first
+ { $ident->column_info($_)->{is_auto_increment} }
+ $ident->columns
+ ;
+
+ if (($op eq 'insert' && $bound_identity_col) ||
+ ($op eq 'update' && exists $args->[0]{$identity_col})) {
+ $sql = join ("\n",
+ $self->_set_table_identity_sql($op => $table, 'on'),
+ $sql,
+ $self->_set_table_identity_sql($op => $table, 'off'),
);
- 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, $identity_col);
- }
+ if ($op eq 'insert' && (not $bound_identity_col) && $identity_col) {
+ $sql =
+ "$sql\n" .
+ $self->_fetch_identity_sql($ident, $identity_col);
}
return ($sql, $bind);
}
-# Stolen from SQLT, with some modifications. This will likely change when the
-# SQLT Sybase stuff is redone/fixed-up.
-my %TYPE_MAPPING = (
+sub _set_table_identity_sql {
+ my ($self, $op, $table, $on_off) = @_;
+
+ return sprintf 'SET IDENTITY_%s %s %s',
+ uc($op), $self->sql_maker->_quote($table), uc($on_off);
+}
+
+# Stolen from SQLT, with some modifications. This is a makeshift
+# solution before a sane type-mapping library is available, thus
+# the 'our' for easy overrides.
+our %TYPE_MAPPING = (
number => 'numeric',
money => 'money',
varchar => 'varchar',
long => 'varchar',
);
-sub _syb_base_type {
+sub _native_data_type {
my ($self, $type) = @_;
$type = lc $type;
- $type =~ s/ identity//;
+ $type =~ s/\s* identity//x;
return uc($TYPE_MAPPING{$type} || $type);
}
sub _fetch_identity_sql {
my ($self, $source, $col) = @_;
- return "SELECT MAX($col) FROM ".$source->from;
+ return sprintf ("SELECT MAX(%s) FROM %s",
+ map { $self->sql_maker->_quote ($_) } ($col, $source->from)
+ );
}
sub _execute {
sub last_insert_id { shift->_identity }
-# override to handle TEXT/IMAGE and to do a transaction if necessary
+# handles TEXT/IMAGE and transaction for last_insert_id
sub insert {
- my ($self, $source, $to_insert) = splice @_, 0, 3;
- my $dbh = $self->_dbh;
+ my $self = shift;
+ my ($source, $to_insert) = @_;
+
+ my $identity_col = (List::Util::first
+ { $source->column_info($_)->{is_auto_increment} }
+ $source->columns) || '';
+
+ # check for empty insert
+ # INSERT INTO foo DEFAULT VALUES -- does not work with Sybase
+ # try to insert explicit 'DEFAULT's instead (except for identity)
+ if (not %$to_insert) {
+ for my $col ($source->columns) {
+ next if $col eq $identity_col;
+ $to_insert->{$col} = \'DEFAULT';
+ }
+ }
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, @_);
- }
+ # 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 ?
+ ($identity_col => $self->last_insert_id($source, $identity_col)) : ()),
+ %$to_insert,
+ %$updated_cols,
};
- $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols;
+ $self->_insert_blobs ($source, $blob_cols, $final_row) if $blob_cols;
return $updated_cols;
}
sub update {
- my ($self, $source) = splice @_, 0, 2;
- my ($fields, $where) = @_;
- my $wantarray = wantarray;
+ my $self = shift;
+ my ($source, $fields, $where, @rest) = @_;
+
+ my $wantarray = wantarray;
my $blob_cols = $self->_remove_blob_cols($source, $fields);
+ my $table = $source->name;
+
+ my $identity_col = List::Util::first
+ { $source->column_info($_)->{is_auto_increment} }
+ $source->columns;
+
+ my $is_identity_update = $identity_col && defined $fields->{$identity_col};
+
+ return $self->next::method(@_) unless $blob_cols;
+
+# If there are any blobs in $where, Sybase will return a descriptive error
+# message.
+# XXX blobs can still be used with a LIKE query, and this should be handled.
+
+# update+blob update(s) done atomically on separate connection
+ $self = $self->_writer_storage;
+
+ my $guard = $self->txn_scope_guard;
+
+# First update the blob columns to be updated to '' (taken from $fields, where
+# it is originally put by _remove_blob_cols .)
+ my %blobs_to_empty = map { ($_ => delete $fields->{$_}) } keys %$blob_cols;
+
+ $self->next::method($source, \%blobs_to_empty, $where, @rest);
+
+# Now update the blobs before the other columns in case the update of other
+# columns makes the search condition invalid.
+ $self->_update_blobs($source, $blob_cols, $where);
+
my @res;
- if ($wantarray) {
- @res = $self->next::method($source, @_);
- } else {
- $res[0] = $self->next::method($source, @_);
+ if (%$fields) {
+ if ($wantarray) {
+ @res = $self->next::method(@_);
+ }
+ elsif (defined $wantarray) {
+ $res[0] = $self->next::method(@_);
+ }
+ else {
+ $self->next::method(@_);
+ }
}
- $self->_update_blobs($source, $blob_cols, $where) if %$blob_cols;
+ $guard->commit;
return $wantarray ? @res : $res[0];
}
+sub insert_bulk {
+ my $self = shift;
+ my ($source, $cols, $data) = @_;
+
+ my $identity_col = List::Util::first
+ { $source->column_info($_)->{is_auto_increment} }
+ $source->columns;
+
+ my $is_identity_insert = (List::Util::first
+ { $_ eq $identity_col }
+ @{$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
+regular array inserts.
+EOF
+ $self->_bulk_disabled_due_to_coderef_connect_info_warned(1);
+ }
+
+ if (not $use_bulk_api) {
+ my $blob_cols = $self->_remove_blob_cols_array($source, $cols, $data);
+
+ my $dumb_last_insert_id =
+ $identity_col
+ && (not $is_identity_insert)
+ && ($self->_identity_method||'') ne '@@IDENTITY';
+
+ ($self, my ($guard)) = do {
+ if ($self->{transaction_depth} == 0 && $blob_cols &&
+ $dumb_last_insert_id) {
+ ($self->_writer_storage, $self->_writer_storage->txn_scope_guard);
+ }
+ else {
+ ($self, undef);
+ }
+ };
+
+ $self->next::method(@_);
+
+ if ($blob_cols) {
+ if ($is_identity_insert) {
+ $self->_insert_blobs_array ($source, $blob_cols, $cols, $data);
+ }
+ else {
+ my @cols_with_identities = (@$cols, $identity_col);
+
+ ## calculate identities
+ # XXX This assumes identities always increase by 1, which may or may not
+ # be true.
+ my ($last_identity) =
+ $self->_dbh->selectrow_array (
+ $self->_fetch_identity_sql($source, $identity_col)
+ );
+ my @identities = (($last_identity - @$data + 1) .. $last_identity);
+
+ my @data_with_identities = map [@$_, shift @identities], @$data;
+
+ $self->_insert_blobs_array (
+ $source, $blob_cols, \@cols_with_identities, \@data_with_identities
+ );
+ }
+ }
+
+ $guard->commit if $guard;
+ return;
+ }
+
+# otherwise, use the bulk API
+
+# rearrange @$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;
+ }
+
+# 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 = do {
+ my $idx = 0;
+ map [ $_, $idx++ ], @source_columns;
+ };
+
+ $self->_execute_array(
+ $source, $sth, \@bind, \@source_columns, \@new_data, $guard
+ );
+
+ $bulk->_query_end($sql);
+ };
+
+ my $exception = $@;
+ DBD::Sybase::set_cslib_cb($orig_cslib_cb);
+
+ if ($exception =~ /-Y option/) {
+ carp <<"EOF";
+
+Sybase bulk API operation failed due to character set incompatibility, reverting
+to regular array inserts:
+
+*** Try unsetting the LANG environment variable.
+
+$exception
+EOF
+ $self->_bulk_storage(undef);
+ unshift @_, $self;
+ goto \&insert_bulk;
+ }
+ elsif ($exception) {
+# rollback makes the bulkLogin connection unusable
+ $self->_bulk_storage->disconnect;
+ $self->throw_exception($exception);
+ }
+}
+
+# Make sure blobs are not bound as placeholders, and return any non-empty ones
+# as a hash.
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} = \"''";
+ if ($self->_is_lob_column($source, $col)) {
+ my $blob_val = delete $fields->{$col};
+ if (not defined $blob_val) {
+ $fields->{$col} = \'NULL';
+ }
+ else {
+ $fields->{$col} = \"''";
+ $blob_cols{$col} = $blob_val unless $blob_val eq '';
+ }
+ }
+ }
+
+ return keys %blob_cols ? \%blob_cols : undef;
+}
+
+# same for insert_bulk
+sub _remove_blob_cols_array {
+ my ($self, $source, $cols, $data) = @_;
+
+ my @blob_cols;
+
+ for my $i (0..$#$cols) {
+ my $col = $cols->[$i];
+
+ if ($self->_is_lob_column($source, $col)) {
+ for my $j (0..$#$data) {
+ my $blob_val = delete $data->[$j][$i];
+ if (not defined $blob_val) {
+ $data->[$j][$i] = \'NULL';
+ }
+ else {
+ $data->[$j][$i] = \"''";
+ $blob_cols[$j][$i] = $blob_val
+ unless $blob_val eq '';
+ }
+ }
}
}
- return \%blob_cols;
+ return @blob_cols ? \@blob_cols : undef;
}
sub _update_blobs {
my (@primary_cols) = $source->primary_columns;
- croak "Cannot update TEXT/IMAGE column(s) without a primary key"
+ $self->throw_exception('Cannot update TEXT/IMAGE column(s) without a primary key')
unless @primary_cols;
# check if we're updating a single row by PK
@row_to_update{@primary_cols} = @{$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
+ my $cursor = $self->select ($source, \@primary_cols, $where, {});
+ @rows = map {
+ my %row; @row{@primary_cols} = @$_; \%row
+ } $cursor->all;
}
for my $row (@rows) {
sub _insert_blobs {
my ($self, $source, $blob_cols, $row) = @_;
- my $dbh = $self->dbh;
+ my $dbh = $self->_get_dbh;
- my $table = $source->from;
+ my $table = $source->name;
my %row = %$row;
my (@primary_cols) = $source->primary_columns;
- croak "Cannot update TEXT/IMAGE column(s) without a primary key"
+ $self->throw_exception('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";
- }
- }
+ $self->throw_exception('Cannot update TEXT/IMAGE column(s) without primary key values')
+ if ((grep { defined $row{$_} } @primary_cols) != @primary_cols);
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;
+
+ my $cursor = $self->select ($source, [$col], \%where, {});
$cursor->next;
my $sth = $cursor->sth;
+ if (not $sth) {
+
+ $self->throw_exception(
+ "Could not find row in table '$table' for blob update:\n"
+ . $self->_pretty_print (\%where)
+ );
+ }
+
eval {
do {
$sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr;
$sth->finish if $sth;
if ($exception) {
if ($self->using_freetds) {
- croak
-"TEXT/IMAGE operation failed, probably because you're using FreeTDS: " .
-$exception;
+ $self->throw_exception (
+ 'TEXT/IMAGE operation failed, probably because you are using FreeTDS: '
+ . $exception
+ );
} else {
- croak $exception;
+ $self->throw_exception($exception);
}
}
}
}
+sub _insert_blobs_array {
+ my ($self, $source, $blob_cols, $cols, $data) = @_;
+
+ for my $i (0..$#$data) {
+ my $datum = $data->[$i];
+
+ my %row;
+ @row{ @$cols } = @$datum;
+
+ my %blob_vals;
+ for my $j (0..$#$cols) {
+ if (exists $blob_cols->[$i][$j]) {
+ $blob_vals{ $cols->[$j] } = $blob_cols->[$i][$j];
+ }
+ }
+
+ $self->_insert_blobs ($source, \%blob_vals, \%row);
+ }
+}
+
=head2 connect_call_datetime_setup
Used as:
my $dbh = $self->_dbh;
if ($dbh->can('syb_date_fmt')) {
-# amazingly, this works with FreeTDS
+ # 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 ".
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->dbh->do('BEGIN TRAN');
+ $self->_get_dbh->do('BEGIN TRAN');
}
+
+ $self->_began_bulk_work(1) if $self->_is_bulk_storage;
}
sub _dbh_commit {
sub _svp_begin {
my ($self, $name) = @_;
- $self->dbh->do("SAVE TRANSACTION $name");
+ $self->_get_dbh->do("SAVE TRANSACTION $name");
}
# A new SAVE TRANSACTION with the same name releases the previous one.
sub _svp_rollback {
my ($self, $name) = @_;
- $self->dbh->do("ROLLBACK TRANSACTION $name");
+ $self->_get_dbh->do("ROLLBACK TRANSACTION $name");
}
1;
It is available via subversion from:
- http://dev.catalyst.perl.org/repos/bast/branches/DBIx-Class-Schema-Loader/mssql_tweaks
+ http://dev.catalyst.perl.org/repos/bast/branches/DBIx-Class-Schema-Loader/current/
=head1 FreeTDS
case the storage will be reblessed to
L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>.
-In some configurations, placeholders will work but will throw implicit
+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 is automatically set, which you may enable yourself with
-L</connect_call_set_auto_cast> (see the description of that method for more
-details.)
+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; nor can you use multiple
+active cursors within a transaction. 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,
+ ...
+ });
+ }
+ });
+
+This won't either:
+
+ my $first_row = $large_rs->first;
+ $schema->txn_do(sub { ... });
+
+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
See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
setting you need to work with C<IMAGE> columns.
-=head1 AUTHORS
+=head1 BULK API
+
+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.
+
+To use this feature effectively, use a large number of rows for each
+L<populate|DBIx::Class::ResultSet/populate> call, eg.:
+
+ while (my $rows = $data_source->get_100_rows()) {
+ $rs->populate($rows);
+ }
+
+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.
+
+When inserting IMAGE columns using this method, you'll need to use
+L</connect_call_blob_setup> as well.
+
+=head1 AUTHOR
See L<DBIx::Class/CONTRIBUTORS>.