Current File : C:/xampp/perl/vendor/lib/DBIx/Class/Storage/DBI/ODBC/ACCESS.pm
package DBIx::Class::Storage::DBI::ODBC::ACCESS;
use strict;
use warnings;
use base qw/
DBIx::Class::Storage::DBI::ODBC
DBIx::Class::Storage::DBI::ACCESS
/;
use mro 'c3';
__PACKAGE__->mk_group_accessors(inherited =>
'disable_sth_caching_for_image_insert_or_update'
);
__PACKAGE__->disable_sth_caching_for_image_insert_or_update(1);
=head1 NAME
DBIx::Class::Storage::DBI::ODBC::ACCESS - Support specific to MS Access over ODBC
=head1 DESCRIPTION
This class implements support specific to Microsoft Access over ODBC.
It is a subclass of L<DBIx::Class::Storage::DBI::ODBC> and
L<DBIx::Class::Storage::DBI::ACCESS>, see those classes for more
information.
It is loaded automatically by L<DBIx::Class::Storage::DBI::ODBC> when it
detects a MS Access back-end.
This driver implements workarounds for C<IMAGE> and C<MEMO> columns, and
L<DBIx::Class::InflateColumn::DateTime> support for C<DATETIME> columns.
=head1 EXAMPLE DSN
dbi:ODBC:driver={Microsoft Access Driver (*.mdb, *.accdb)};dbq=C:\Users\rkitover\Documents\access_sample.accdb
=head1 TEXT/IMAGE/MEMO COLUMNS
Avoid using C<TEXT> columns as they will be truncated to 255 bytes. Some other
drivers (like L<ADO|DBIx::Class::Storage::DBI::ADO::MS_Jet>) will automatically
convert C<TEXT> columns to C<MEMO>, but the ODBC driver does not.
C<IMAGE> columns work correctly, but the statements for inserting or updating an
C<IMAGE> column will not be L<cached|DBI/prepare_cached>, due to a bug in the
Access ODBC driver.
C<MEMO> columns work correctly as well, but you must take care to set
L<LongReadLen|DBI/LongReadLen> to C<$max_memo_size * 2 + 1>. This is done for
you automatically if you pass L<LongReadLen|DBI/LongReadLen> in your
L<connect_info|DBIx::Class::Storage::DBI/connect_info>; but if you set this
attribute directly on the C<$dbh>, keep this limitation in mind.
=cut
# set LongReadLen = LongReadLen * 2 + 1 (see docs on MEMO)
sub _run_connection_actions {
my $self = shift;
my $long_read_len = $self->_dbh->{LongReadLen};
# 80 is another default (just like 0) on some drivers
if ($long_read_len != 0 && $long_read_len != 80) {
$self->_dbh->{LongReadLen} = $long_read_len * 2 + 1;
}
# batch operations do not work
$self->_disable_odbc_array_ops;
return $self->next::method(@_);
}
sub insert {
my $self = shift;
my ($source, $to_insert) = @_;
my $columns_info = $source->columns_info;
my $is_image_insert = 0;
for my $col (keys %$to_insert) {
if ($self->_is_binary_lob_type($columns_info->{$col}{data_type})) {
$is_image_insert = 1;
last;
}
}
local $self->{disable_sth_caching} = 1 if $is_image_insert
&& $self->disable_sth_caching_for_image_insert_or_update;
return $self->next::method(@_);
}
sub update {
my $self = shift;
my ($source, $fields) = @_;
my $columns_info = $source->columns_info;
my $is_image_insert = 0;
for my $col (keys %$fields) {
if ($self->_is_binary_lob_type($columns_info->{$col}{data_type})) {
$is_image_insert = 1;
last;
}
}
local $self->{disable_sth_caching} = 1 if $is_image_insert
&& $self->disable_sth_caching_for_image_insert_or_update;
return $self->next::method(@_);
}
sub datetime_parser_type {
'DBIx::Class::Storage::DBI::ODBC::ACCESS::DateTime::Format'
}
package # hide from PAUSE
DBIx::Class::Storage::DBI::ODBC::ACCESS::DateTime::Format;
my $datetime_format = '%Y-%m-%d %H:%M:%S'; # %F %T, no fractional part
my $datetime_parser;
sub parse_datetime {
shift;
require DateTime::Format::Strptime;
$datetime_parser ||= DateTime::Format::Strptime->new(
pattern => $datetime_format,
on_error => 'croak',
);
return $datetime_parser->parse_datetime(shift);
}
sub format_datetime {
shift;
require DateTime::Format::Strptime;
$datetime_parser ||= DateTime::Format::Strptime->new(
pattern => $datetime_format,
on_error => 'croak',
);
return $datetime_parser->format_datetime(shift);
}
=head1 FURTHER QUESTIONS?
Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
=head1 COPYRIGHT AND LICENSE
This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
redistribute it and/or modify it under the same terms as the
L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.
=cut
1;
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