line |
stmt |
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cond |
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pod |
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code |
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package DBIx::Class::Storage::DBI::mysql; |
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2041
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use strict; |
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99
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use warnings; |
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use base qw/DBIx::Class::Storage::DBI/; |
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2964
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__PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::MySQL'); |
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__PACKAGE__->sql_limit_dialect ('LimitXY'); |
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__PACKAGE__->sql_quote_char ('`'); |
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__PACKAGE__->_use_multicolumn_in (1); |
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sub with_deferred_fk_checks { |
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0
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0
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1
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my ($self, $sub) = @_; |
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17
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0
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0
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$self->_do_query('SET FOREIGN_KEY_CHECKS = 0'); |
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0
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0
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$sub->(); |
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0
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0
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$self->_do_query('SET FOREIGN_KEY_CHECKS = 1'); |
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} |
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22
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sub connect_call_set_strict_mode { |
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0
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0
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my $self = shift; |
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25
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# the @@sql_mode puts back what was previously set on the session handle |
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0
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0
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$self->_do_query(q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|); |
27
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0
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0
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$self->_do_query(q|SET SQL_AUTO_IS_NULL = 0|); |
28
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} |
29
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30
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sub _dbh_last_insert_id { |
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0
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0
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0
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my ($self, $dbh, $source, $col) = @_; |
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0
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0
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$dbh->{mysql_insertid}; |
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} |
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35
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sub _prep_for_execute { |
36
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4
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4
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my $self = shift; |
37
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#(my $op, $ident, $args) = @_; |
38
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39
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# Only update and delete need special double-subquery treatment |
40
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# Insert referencing the same table (i.e. SELECT MAX(id) + 1) seems |
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# to work just fine on MySQL |
42
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4
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50
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33
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return $self->next::method(@_) if ( $_[0] eq 'select' or $_[0] eq 'insert' ); |
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44
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45
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# FIXME FIXME FIXME - this is a terrible, gross, incomplete, MySQL-specific |
46
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# hack but it works rather well for the limited amount of actual use cases |
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# which can not be done in any other way on MySQL. This allows us to fix |
48
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# some bugs without breaking MySQL support in the process and is also |
49
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# crucial for more complex things like Shadow to be usable |
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# |
51
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# This code is just a pre-analyzer, working in tandem with ::SQLMaker::MySQL, |
52
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# where the possibly-set value of {_modification_target_referenced_re} is |
53
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# used to demarcate which part of the final SQL to double-wrap in a subquery. |
54
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# |
55
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# This is covered extensively by "offline" tests, so when the DQ work |
56
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# resumes, this will get flagged. Afaik there are no AST-visitor code of that |
57
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# magnitude yet (Oct 2015) within DQ, so a good exercise overall. |
58
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59
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# extract the source name, construct modification indicator re |
60
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4
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11
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my $sm = $self->sql_maker; |
61
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62
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4
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19
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my $target_name = $_[1]->from; |
63
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64
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4
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100
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10
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if (ref $target_name) { |
65
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2
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50
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33
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16
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if ( |
66
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ref $target_name eq 'SCALAR' |
67
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and |
68
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$$target_name =~ /^ (?: |
69
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\` ( [^`]+ ) \` #` |
70
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| ( [\w\-]+ ) |
71
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) $/x |
72
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) { |
73
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# this is just a plain-ish name, which has been literal-ed for |
74
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# whatever reason |
75
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2
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50
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9
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$target_name = (defined $1) ? $1 : $2; |
76
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} |
77
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else { |
78
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# this is something very complex, perhaps a custom result source or whatnot |
79
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# can't deal with it |
80
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0
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0
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undef $target_name; |
81
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} |
82
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} |
83
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84
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local $sm->{_modification_target_referenced_re} = |
85
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4
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50
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130
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qr/ (?
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86
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if $target_name; |
87
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88
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4
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18
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$self->next::method(@_); |
89
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} |
90
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91
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# here may seem like an odd place to override, but this is the first |
92
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# method called after we are connected *and* the driver is determined |
93
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# ($self is reblessed). See code flow in ::Storage::DBI::_populate_dbh |
94
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sub _run_connection_actions { |
95
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3
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3
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5
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my $self = shift; |
96
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97
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# default mysql_auto_reconnect to off unless explicitly set |
98
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3
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50
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33
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23
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if ( |
99
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$self->_dbh->{mysql_auto_reconnect} |
100
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and |
101
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! exists $self->_dbic_connect_attributes->{mysql_auto_reconnect} |
102
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) { |
103
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0
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0
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$self->_dbh->{mysql_auto_reconnect} = 0; |
104
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} |
105
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106
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3
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16
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$self->next::method(@_); |
107
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} |
108
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109
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# we need to figure out what mysql version we're running |
110
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sub sql_maker { |
111
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34
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34
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1
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144
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my $self = shift; |
112
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113
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# it is critical to get the version *before* calling next::method |
114
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# otherwise the potential connect will obliterate the sql_maker |
115
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# next::method will populate in the _sql_maker accessor |
116
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34
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605
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my $mysql_ver = $self->_server_info->{normalized_dbms_version}; |
117
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118
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34
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141
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my $sm = $self->next::method(@_); |
119
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120
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# mysql 3 does not understand a bare JOIN |
121
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34
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100
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124
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$sm->{_default_jointype} = 'INNER' if $mysql_ver < 4; |
122
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123
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34
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136
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$sm; |
124
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} |
125
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126
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sub sqlt_type { |
127
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0
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0
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1
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return 'MySQL'; |
128
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} |
129
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130
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sub deployment_statements { |
131
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0
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0
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1
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my $self = shift; |
132
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0
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my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_; |
133
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134
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0
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0
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$sqltargs ||= {}; |
135
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136
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0
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0
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0
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if ( |
137
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! exists $sqltargs->{producer_args}{mysql_version} |
138
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and |
139
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my $dver = $self->_server_info->{normalized_dbms_version} |
140
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) { |
141
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0
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$sqltargs->{producer_args}{mysql_version} = $dver; |
142
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} |
143
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144
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0
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$self->next::method($schema, $type, $version, $dir, $sqltargs, @rest); |
145
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} |
146
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147
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sub _exec_svp_begin { |
148
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0
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0
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my ($self, $name) = @_; |
149
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150
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0
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$self->_dbh->do("SAVEPOINT $name"); |
151
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} |
152
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153
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sub _exec_svp_release { |
154
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0
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0
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my ($self, $name) = @_; |
155
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156
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0
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$self->_dbh->do("RELEASE SAVEPOINT $name"); |
157
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} |
158
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159
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sub _exec_svp_rollback { |
160
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0
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0
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my ($self, $name) = @_; |
161
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162
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0
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$self->_dbh->do("ROLLBACK TO SAVEPOINT $name") |
163
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} |
164
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165
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sub is_replicating { |
166
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0
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0
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1
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my $status = shift->_get_dbh->selectrow_hashref('show slave status'); |
167
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0
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0
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return ($status->{Slave_IO_Running} eq 'Yes') && ($status->{Slave_SQL_Running} eq 'Yes'); |
168
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} |
169
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170
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sub lag_behind_master { |
171
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0
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0
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1
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return shift->_get_dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master}; |
172
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} |
173
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174
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1; |
175
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176
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=head1 NAME |
177
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178
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DBIx::Class::Storage::DBI::mysql - Storage::DBI class implementing MySQL specifics |
179
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180
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=head1 SYNOPSIS |
181
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182
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Storage::DBI autodetects the underlying MySQL database, and re-blesses the |
183
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C<$storage> object into this class. |
184
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185
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my $schema = MyApp::Schema->connect( $dsn, $user, $pass, { on_connect_call => 'set_strict_mode' } ); |
186
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187
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=head1 DESCRIPTION |
188
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189
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This class implements MySQL specific bits of L, |
190
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like AutoIncrement column support and savepoints. Also it augments the |
191
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SQL maker to support the MySQL-specific C join type, which |
192
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you can use by specifying C<< join_type => 'straight' >> in the |
193
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L |
194
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195
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196
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It also provides a one-stop on-connect macro C which sets |
197
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session variables such that MySQL behaves more predictably as far as the |
198
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SQL standard is concerned. |
199
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200
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=head1 STORAGE OPTIONS |
201
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202
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=head2 set_strict_mode |
203
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204
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Enables session-wide strict options upon connecting. Equivalent to: |
205
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206
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->connect ( ... , { |
207
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on_connect_do => [ |
208
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q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|, |
209
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|
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q|SET SQL_AUTO_IS_NULL = 0|, |
210
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] |
211
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}); |
212
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213
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=head1 FURTHER QUESTIONS? |
214
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215
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Check the list of L. |
216
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217
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=head1 COPYRIGHT AND LICENSE |
218
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219
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This module is free software L |
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by the L. You can |
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redistribute it and/or modify it under the same terms as the |
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L. |