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1 | package DBIx::Class::Storage::DBI::mysql; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | use base qw/DBIx::Class::Storage::DBI/; |
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7 | |
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8 | use List::Util 'first'; |
9 | use namespace::clean; |
10 | |
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11 | __PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::MySQL'); |
6a247f33 |
12 | __PACKAGE__->sql_limit_dialect ('LimitXY'); |
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13 | __PACKAGE__->sql_quote_char ('`'); |
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14 | |
be64931c |
15 | __PACKAGE__->_use_multicolumn_in (1); |
16 | |
e96a93df |
17 | sub with_deferred_fk_checks { |
18 | my ($self, $sub) = @_; |
19 | |
5cf7285e |
20 | $self->_do_query('SET FOREIGN_KEY_CHECKS = 0'); |
e96a93df |
21 | $sub->(); |
5cf7285e |
22 | $self->_do_query('SET FOREIGN_KEY_CHECKS = 1'); |
e96a93df |
23 | } |
24 | |
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25 | sub connect_call_set_strict_mode { |
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26 | my $self = shift; |
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27 | |
28 | # the @@sql_mode puts back what was previously set on the session handle |
29 | $self->_do_query(q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|); |
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30 | $self->_do_query(q|SET SQL_AUTO_IS_NULL = 0|); |
31 | } |
32 | |
d4f16b21 |
33 | sub _dbh_last_insert_id { |
34 | my ($self, $dbh, $source, $col) = @_; |
35 | $dbh->{mysql_insertid}; |
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36 | } |
37 | |
45150bc4 |
38 | sub _prep_for_execute { |
39 | my $self = shift; |
40 | #(my $op, $ident, $args) = @_; |
41 | |
42 | # Only update and delete need special double-subquery treatment |
43 | # Insert referencing the same table (i.e. SELECT MAX(id) + 1) seems |
44 | # to work just fine on MySQL |
45 | return $self->next::method(@_) if ( $_[0] eq 'select' or $_[0] eq 'insert' ); |
46 | |
47 | |
48 | # FIXME FIXME FIXME - this is a terrible, gross, incomplete hack |
49 | # it should be trivial for mst to port this to DQ (and a good |
50 | # exercise as well, since we do not yet have such wide tree walking |
51 | # in place). For the time being this will work in limited cases, |
52 | # mainly complex update/delete, which is really all we want it for |
53 | # currently (allows us to fix some bugs without breaking MySQL in |
54 | # the process, and is also crucial for Shadow to be usable) |
55 | |
56 | # extract the source name, construct modification indicator re |
57 | my $sm = $self->sql_maker; |
58 | |
59 | my $target_name = $_[1]->from; |
60 | |
61 | if (ref $target_name) { |
62 | if ( |
63 | ref $target_name eq 'SCALAR' |
64 | and |
65 | $$target_name =~ /^ (?: |
66 | \` ( [^`]+ ) \` #` |
67 | | ( [\w\-]+ ) |
68 | ) $/x |
69 | ) { |
70 | # this is just a plain-ish name, which has been literal-ed for |
71 | # whatever reason |
72 | $target_name = first { defined $_ } ($1, $2); |
73 | } |
74 | else { |
75 | # this is something very complex, perhaps a custom result source or whatnot |
76 | # can't deal with it |
77 | undef $target_name; |
78 | } |
79 | } |
80 | |
81 | local $sm->{_modification_target_referenced_re} = |
82 | qr/ (?<!DELETE) [\s\)] FROM \s (?: \` \Q$target_name\E \` | \Q$target_name\E ) [\s\(] /xi |
83 | if $target_name; |
84 | |
85 | $self->next::method(@_); |
86 | } |
87 | |
f98120e4 |
88 | # here may seem like an odd place to override, but this is the first |
89 | # method called after we are connected *and* the driver is determined |
90 | # ($self is reblessed). See code flow in ::Storage::DBI::_populate_dbh |
91 | sub _run_connection_actions { |
92 | my $self = shift; |
93 | |
94 | # default mysql_auto_reconnect to off unless explicitly set |
95 | if ( |
96 | $self->_dbh->{mysql_auto_reconnect} |
97 | and |
98 | ! exists $self->_dbic_connect_attributes->{mysql_auto_reconnect} |
99 | ) { |
100 | $self->_dbh->{mysql_auto_reconnect} = 0; |
101 | } |
102 | |
103 | $self->next::method(@_); |
104 | } |
105 | |
d3944540 |
106 | # we need to figure out what mysql version we're running |
107 | sub sql_maker { |
108 | my $self = shift; |
109 | |
110 | unless ($self->_sql_maker) { |
111 | my $maker = $self->next::method (@_); |
112 | |
113 | # mysql 3 does not understand a bare JOIN |
af1f4f84 |
114 | my $mysql_ver = $self->_dbh_get_info('SQL_DBMS_VER'); |
d3944540 |
115 | $maker->{_default_jointype} = 'INNER' if $mysql_ver =~ /^3/; |
116 | } |
117 | |
118 | return $self->_sql_maker; |
119 | } |
120 | |
e8d293df |
121 | sub sqlt_type { |
122 | return 'MySQL'; |
123 | } |
124 | |
96736321 |
125 | sub deployment_statements { |
126 | my $self = shift; |
127 | my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_; |
128 | |
129 | $sqltargs ||= {}; |
130 | |
131 | if ( |
132 | ! exists $sqltargs->{producer_args}{mysql_version} |
8273e845 |
133 | and |
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134 | my $dver = $self->_server_info->{normalized_dbms_version} |
135 | ) { |
136 | $sqltargs->{producer_args}{mysql_version} = $dver; |
137 | } |
138 | |
139 | $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest); |
140 | } |
141 | |
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142 | sub _exec_svp_begin { |
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143 | my ($self, $name) = @_; |
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144 | |
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145 | $self->_dbh->do("SAVEPOINT $name"); |
adb3554a |
146 | } |
147 | |
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148 | sub _exec_svp_release { |
eeb8cfeb |
149 | my ($self, $name) = @_; |
adb3554a |
150 | |
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151 | $self->_dbh->do("RELEASE SAVEPOINT $name"); |
adb3554a |
152 | } |
153 | |
90d7422f |
154 | sub _exec_svp_rollback { |
eeb8cfeb |
155 | my ($self, $name) = @_; |
adb3554a |
156 | |
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157 | $self->_dbh->do("ROLLBACK TO SAVEPOINT $name") |
adb3554a |
158 | } |
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159 | |
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160 | sub is_replicating { |
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161 | my $status = shift->_get_dbh->selectrow_hashref('show slave status'); |
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162 | return ($status->{Slave_IO_Running} eq 'Yes') && ($status->{Slave_SQL_Running} eq 'Yes'); |
106d5f3b |
163 | } |
164 | |
165 | sub lag_behind_master { |
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166 | return shift->_get_dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master}; |
106d5f3b |
167 | } |
168 | |
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169 | 1; |
170 | |
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171 | =head1 NAME |
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172 | |
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173 | DBIx::Class::Storage::DBI::mysql - Storage::DBI class implementing MySQL specifics |
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174 | |
175 | =head1 SYNOPSIS |
176 | |
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177 | Storage::DBI autodetects the underlying MySQL database, and re-blesses the |
178 | C<$storage> object into this class. |
179 | |
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180 | my $schema = MyDb::Schema->connect( $dsn, $user, $pass, { on_connect_call => 'set_strict_mode' } ); |
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181 | |
182 | =head1 DESCRIPTION |
183 | |
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184 | This class implements MySQL specific bits of L<DBIx::Class::Storage::DBI>, |
185 | like AutoIncrement column support and savepoints. Also it augments the |
186 | SQL maker to support the MySQL-specific C<STRAIGHT_JOIN> join type, which |
187 | you can use by specifying C<< join_type => 'straight' >> in the |
188 | L<relationship attributes|DBIx::Class::Relationship::Base/join_type> |
189 | |
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190 | |
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191 | It also provides a one-stop on-connect macro C<set_strict_mode> which sets |
192 | session variables such that MySQL behaves more predictably as far as the |
193 | SQL standard is concerned. |
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194 | |
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195 | =head1 STORAGE OPTIONS |
196 | |
197 | =head2 set_strict_mode |
198 | |
199 | Enables session-wide strict options upon connecting. Equivalent to: |
200 | |
201 | ->connect ( ... , { |
202 | on_connect_do => [ |
203 | q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|, |
204 | q|SET SQL_AUTO_IS_NULL = 0|, |
205 | ] |
206 | }); |
207 | |
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208 | =head1 AUTHORS |
209 | |
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210 | See L<DBIx::Class/CONTRIBUTORS> |
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211 | |
212 | =head1 LICENSE |
213 | |
214 | You may distribute this code under the same terms as Perl itself. |
215 | |
216 | =cut |