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843f8ecd |
1 | package DBIx::Class::Storage::DBI::mysql; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
698775ed |
6 | use base qw/ |
7 | DBIx::Class::Storage::DBI::MultiColumnIn |
8 | DBIx::Class::Storage::DBI::AmbiguousGlob |
9 | DBIx::Class::Storage::DBI |
10 | /; |
2ad62d97 |
11 | use mro 'c3'; |
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12 | |
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13 | __PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MySQL'); |
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14 | |
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15 | sub with_deferred_fk_checks { |
16 | my ($self, $sub) = @_; |
17 | |
5cf7285e |
18 | $self->_do_query('SET FOREIGN_KEY_CHECKS = 0'); |
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19 | $sub->(); |
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20 | $self->_do_query('SET FOREIGN_KEY_CHECKS = 1'); |
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21 | } |
22 | |
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23 | sub connect_call_set_strict_mode { |
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24 | my $self = shift; |
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25 | |
26 | # the @@sql_mode puts back what was previously set on the session handle |
27 | $self->_do_query(q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|); |
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28 | $self->_do_query(q|SET SQL_AUTO_IS_NULL = 0|); |
29 | } |
30 | |
d4f16b21 |
31 | sub _dbh_last_insert_id { |
32 | my ($self, $dbh, $source, $col) = @_; |
33 | $dbh->{mysql_insertid}; |
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34 | } |
35 | |
d3944540 |
36 | # we need to figure out what mysql version we're running |
37 | sub sql_maker { |
38 | my $self = shift; |
39 | |
40 | unless ($self->_sql_maker) { |
41 | my $maker = $self->next::method (@_); |
42 | |
43 | # mysql 3 does not understand a bare JOIN |
44 | my $mysql_ver = $self->_get_dbh->get_info(18); |
45 | $maker->{_default_jointype} = 'INNER' if $mysql_ver =~ /^3/; |
46 | } |
47 | |
48 | return $self->_sql_maker; |
49 | } |
50 | |
e8d293df |
51 | sub sqlt_type { |
52 | return 'MySQL'; |
53 | } |
54 | |
adb3554a |
55 | sub _svp_begin { |
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56 | my ($self, $name) = @_; |
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57 | |
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58 | $self->_get_dbh->do("SAVEPOINT $name"); |
adb3554a |
59 | } |
60 | |
61 | sub _svp_release { |
eeb8cfeb |
62 | my ($self, $name) = @_; |
adb3554a |
63 | |
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64 | $self->_get_dbh->do("RELEASE SAVEPOINT $name"); |
adb3554a |
65 | } |
66 | |
67 | sub _svp_rollback { |
eeb8cfeb |
68 | my ($self, $name) = @_; |
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69 | |
9ae966b9 |
70 | $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name") |
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71 | } |
48fe9087 |
72 | |
106d5f3b |
73 | sub is_replicating { |
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74 | my $status = shift->_get_dbh->selectrow_hashref('show slave status'); |
f797e89e |
75 | return ($status->{Slave_IO_Running} eq 'Yes') && ($status->{Slave_SQL_Running} eq 'Yes'); |
106d5f3b |
76 | } |
77 | |
78 | sub lag_behind_master { |
9ae966b9 |
79 | return shift->_get_dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master}; |
106d5f3b |
80 | } |
81 | |
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82 | # MySql can not do subquery update/deletes, only way is slow per-row operations. |
ab807c12 |
83 | # This assumes you have set proper transaction isolation and use innodb. |
b5963465 |
84 | sub _subq_update_delete { |
613f65e5 |
85 | return shift->_per_row_update_delete (@_); |
86 | } |
87 | |
843f8ecd |
88 | 1; |
89 | |
75d07914 |
90 | =head1 NAME |
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91 | |
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92 | DBIx::Class::Storage::DBI::mysql - Storage::DBI class implementing MySQL specifics |
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93 | |
94 | =head1 SYNOPSIS |
95 | |
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96 | Storage::DBI autodetects the underlying MySQL database, and re-blesses the |
97 | C<$storage> object into this class. |
98 | |
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99 | my $schema = MyDb::Schema->connect( $dsn, $user, $pass, { on_connect_call => 'set_strict_mode' } ); |
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100 | |
101 | =head1 DESCRIPTION |
102 | |
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103 | This class implements MySQL specific bits of L<DBIx::Class::Storage::DBI>. |
104 | |
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105 | It also provides a one-stop on-connect macro C<set_strict_mode> which sets |
106 | session variables such that MySQL behaves more predictably as far as the |
107 | SQL standard is concerned. |
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108 | |
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109 | =head1 AUTHORS |
110 | |
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111 | See L<DBIx::Class/CONTRIBUTORS> |
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112 | |
113 | =head1 LICENSE |
114 | |
115 | You may distribute this code under the same terms as Perl itself. |
116 | |
117 | =cut |