/usr/share/perl5/DBIx/Class/Storage/DBI/mysql.pm is in libdbix-class-perl 0.082840-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 | package DBIx::Class::Storage::DBI::mysql;
use strict;
use warnings;
use base qw/DBIx::Class::Storage::DBI/;
use namespace::clean;
__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->_do_query('SET FOREIGN_KEY_CHECKS = 0');
$sub->();
$self->_do_query('SET FOREIGN_KEY_CHECKS = 1');
}
sub connect_call_set_strict_mode {
my $self = shift;
# 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)|);
$self->_do_query(q|SET SQL_AUTO_IS_NULL = 0|);
}
sub _dbh_last_insert_id {
my ($self, $dbh, $source, $col) = @_;
$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 hack
# it should be trivial for mst to port this to DQ (and a good
# exercise as well, since we do not yet have such wide tree walking
# in place). For the time being this will work in limited cases,
# mainly complex update/delete, which is really all we want it for
# currently (allows us to fix some bugs without breaking MySQL in
# the process, and is also crucial for Shadow to be usable)
# 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 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 $name");
}
sub _exec_svp_release {
my ($self, $name) = @_;
$self->_dbh->do("RELEASE SAVEPOINT $name");
}
sub _exec_svp_rollback {
my ($self, $name) = @_;
$self->_dbh->do("ROLLBACK TO SAVEPOINT $name")
}
sub is_replicating {
my $status = shift->_get_dbh->selectrow_hashref('show slave status');
return ($status->{Slave_IO_Running} eq 'Yes') && ($status->{Slave_SQL_Running} eq 'Yes');
}
sub lag_behind_master {
return shift->_get_dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master};
}
1;
=head1 NAME
DBIx::Class::Storage::DBI::mysql - Storage::DBI class implementing MySQL specifics
=head1 SYNOPSIS
Storage::DBI autodetects the underlying MySQL database, and re-blesses the
C<$storage> object into this class.
my $schema = MyApp::Schema->connect( $dsn, $user, $pass, { on_connect_call => 'set_strict_mode' } );
=head1 DESCRIPTION
This class implements 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:
->connect ( ... , {
on_connect_do => [
q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|,
q|SET SQL_AUTO_IS_NULL = 0|,
]
});
=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>.
|