use strict;
use warnings;
-use base qw/
- DBIx::Class::Storage::DBI::MultiColumnIn
- DBIx::Class::Storage::DBI::AmbiguousGlob
- DBIx::Class::Storage::DBI
-/;
+use base qw/DBIx::Class::Storage::DBI/;
-__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MySQL');
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::MySQL');
+__PACKAGE__->sql_limit_dialect ('LimitXY');
+__PACKAGE__->sql_quote_char ('`');
+
+__PACKAGE__->_use_multicolumn_in (1);
sub with_deferred_fk_checks {
my ($self, $sub) = @_;
- $self->dbh->do('SET foreign_key_checks=0');
+ $self->_do_query('SET FOREIGN_KEY_CHECKS = 0');
$sub->();
- $self->dbh->do('SET foreign_key_checks=1');
+ $self->_do_query('SET FOREIGN_KEY_CHECKS = 1');
}
-sub connect_call_set_ansi_mode {
+sub connect_call_set_strict_mode {
my $self = shift;
- $self->dbh->do(q|SET sql_mode = 'ANSI,TRADITIONAL'|);
- $self->dbh->do(q|SET sql_mode = 'ANSI,TRADITIONAL'|);
+
+ # the @@sql_mode puts back what was previously set on the session handle
+ $self->_do_query(q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|);
+ $self->_do_query(q|SET SQL_AUTO_IS_NULL = 0|);
}
sub _dbh_last_insert_id {
$dbh->{mysql_insertid};
}
+sub _prep_for_execute {
+ my $self = shift;
+ #(my $op, $ident, $args) = @_;
+
+ # Only update and delete need special double-subquery treatment
+ # Insert referencing the same table (i.e. SELECT MAX(id) + 1) seems
+ # to work just fine on MySQL
+ return $self->next::method(@_) if ( $_[0] eq 'select' or $_[0] eq 'insert' );
+
+
+ # FIXME FIXME FIXME - this is a terrible, gross, incomplete, MySQL-specific
+ # hack but it works rather well for the limited amount of actual use cases
+ # which can not be done in any other way on MySQL. This allows us to fix
+ # some bugs without breaking MySQL support in the process and is also
+ # crucial for more complex things like Shadow to be usable
+ #
+ # This code is just a pre-analyzer, working in tandem with ::SQLMaker::MySQL,
+ # where the possibly-set value of {_modification_target_referenced_re} is
+ # used to demarcate which part of the final SQL to double-wrap in a subquery.
+ #
+ # This is covered extensively by "offline" tests, so when the DQ work
+ # resumes, this will get flagged. Afaik there are no AST-visitor code of that
+ # magnitude yet (Oct 2015) within DQ, so a good exercise overall.
+
+ # extract the source name, construct modification indicator re
+ my $sm = $self->sql_maker;
+
+ my $target_name = $_[1]->from;
+
+ if (ref $target_name) {
+ if (
+ ref $target_name eq 'SCALAR'
+ and
+ $$target_name =~ /^ (?:
+ \` ( [^`]+ ) \` #`
+ | ( [\w\-]+ )
+ ) $/x
+ ) {
+ # this is just a plain-ish name, which has been literal-ed for
+ # whatever reason
+ $target_name = (defined $1) ? $1 : $2;
+ }
+ else {
+ # this is something very complex, perhaps a custom result source or whatnot
+ # can't deal with it
+ undef $target_name;
+ }
+ }
+
+ local $sm->{_modification_target_referenced_re} =
+ qr/ (?<!DELETE) [\s\)] (?: FROM | JOIN ) \s (?: \` \Q$target_name\E \` | \Q$target_name\E ) [\s\(] /xi
+ if $target_name;
+
+ $self->next::method(@_);
+}
+
+# here may seem like an odd place to override, but this is the first
+# method called after we are connected *and* the driver is determined
+# ($self is reblessed). See code flow in ::Storage::DBI::_populate_dbh
+sub _run_connection_actions {
+ my $self = shift;
+
+ # default mysql_auto_reconnect to off unless explicitly set
+ if (
+ $self->_dbh->{mysql_auto_reconnect}
+ and
+ ! exists $self->_dbic_connect_attributes->{mysql_auto_reconnect}
+ ) {
+ $self->_dbh->{mysql_auto_reconnect} = 0;
+ }
+
+ $self->next::method(@_);
+}
+
+# we need to figure out what mysql version we're running
+sub sql_maker {
+ my $self = shift;
+
+ # it is critical to get the version *before* calling next::method
+ # otherwise the potential connect will obliterate the sql_maker
+ # next::method will populate in the _sql_maker accessor
+ my $mysql_ver = $self->_server_info->{normalized_dbms_version};
+
+ my $sm = $self->next::method(@_);
+
+ # mysql 3 does not understand a bare JOIN
+ $sm->{_default_jointype} = 'INNER' if $mysql_ver < 4;
+
+ $sm;
+}
+
sub sqlt_type {
return 'MySQL';
}
-sub _svp_begin {
+sub deployment_statements {
+ my $self = shift;
+ my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_;
+
+ $sqltargs ||= {};
+
+ if (
+ ! exists $sqltargs->{producer_args}{mysql_version}
+ and
+ my $dver = $self->_server_info->{normalized_dbms_version}
+ ) {
+ $sqltargs->{producer_args}{mysql_version} = $dver;
+ }
+
+ $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
+}
+
+sub _exec_svp_begin {
my ($self, $name) = @_;
- $self->dbh->do("SAVEPOINT $name");
+ $self->_dbh->do("SAVEPOINT $name");
}
-sub _svp_release {
+sub _exec_svp_release {
my ($self, $name) = @_;
- $self->dbh->do("RELEASE SAVEPOINT $name");
+ $self->_dbh->do("RELEASE SAVEPOINT $name");
}
-sub _svp_rollback {
+sub _exec_svp_rollback {
my ($self, $name) = @_;
- $self->dbh->do("ROLLBACK TO SAVEPOINT $name")
+ $self->_dbh->do("ROLLBACK TO SAVEPOINT $name")
}
sub is_replicating {
- my $status = shift->dbh->selectrow_hashref('show slave status');
+ my $status = shift->_get_dbh->selectrow_hashref('show slave status');
return ($status->{Slave_IO_Running} eq 'Yes') && ($status->{Slave_SQL_Running} eq 'Yes');
}
sub lag_behind_master {
- return shift->dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master};
-}
-
-# MySql can not do subquery update/deletes, only way is slow per-row operations.
-# This assumes you have set proper transaction isolation and use innodb.
-sub _subq_update_delete {
- return shift->_per_row_update_delete (@_);
+ return shift->_get_dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master};
}
1;
=head1 NAME
-DBIx::Class::Storage::DBI::mysql - Automatic primary key class for MySQL
+DBIx::Class::Storage::DBI::mysql - Storage::DBI class implementing MySQL specifics
=head1 SYNOPSIS
- # In your table classes
- __PACKAGE__->load_components(qw/PK::Auto Core/);
- __PACKAGE__->set_primary_key('id');
+Storage::DBI autodetects the underlying MySQL database, and re-blesses the
+C<$storage> object into this class.
+
+ my $schema = MyApp::Schema->connect( $dsn, $user, $pass, { on_connect_call => 'set_strict_mode' } );
=head1 DESCRIPTION
-This class implements autoincrements for MySQL.
+This class implements MySQL specific bits of L<DBIx::Class::Storage::DBI>,
+like AutoIncrement column support and savepoints. Also it augments the
+SQL maker to support the MySQL-specific C<STRAIGHT_JOIN> join type, which
+you can use by specifying C<< join_type => 'straight' >> in the
+L<relationship attributes|DBIx::Class::Relationship::Base/join_type>
+
+
+It also provides a one-stop on-connect macro C<set_strict_mode> which sets
+session variables such that MySQL behaves more predictably as far as the
+SQL standard is concerned.
+
+=head1 STORAGE OPTIONS
+
+=head2 set_strict_mode
+
+Enables session-wide strict options upon connecting. Equivalent to:
-=head1 AUTHORS
+ ->connect ( ... , {
+ on_connect_do => [
+ q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|,
+ q|SET SQL_AUTO_IS_NULL = 0|,
+ ]
+ });
-Matt S. Trout <mst@shadowcatsystems.co.uk>
+=head1 FURTHER QUESTIONS?
-=head1 LICENSE
+Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
-You may distribute this code under the same terms as Perl itself.
+=head1 COPYRIGHT AND LICENSE
-=cut
+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>.
projects / dbsrgits/DBIx-Class.git / blobdiff