| 1 | # Movable Type (r) Open Source (C) 2001-2008 Six Apart, Ltd. |
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| 2 | # This program is distributed under the terms of the |
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| 3 | # GNU General Public License, version 2. |
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| 4 | # |
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| 5 | # $Id$ |
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| 6 | |
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| 7 | package MT::ObjectDriver::Driver::DBI; |
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| 8 | |
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| 9 | use strict; |
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| 10 | use base qw( Data::ObjectDriver::Driver::DBI ); |
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| 11 | |
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| 12 | sub init { |
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| 13 | my $driver = shift; |
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| 14 | my (%param) = @_; |
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| 15 | $param{prefix} ||= 'mt_'; |
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| 16 | $driver->SUPER::init(%param); |
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| 17 | my $opts = $driver->connect_options || {}; |
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| 18 | $opts->{RaiseError} = 0; |
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| 19 | $driver->connect_options($opts); |
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| 20 | $driver; |
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| 21 | } |
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| 22 | |
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| 23 | sub configure { |
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| 24 | my $driver = shift; |
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| 25 | $driver->dbd->configure($driver, @_); |
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| 26 | } |
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| 27 | |
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| 28 | sub table_exists { |
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| 29 | my $driver = shift; |
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| 30 | my ($class) = @_; |
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| 31 | return $driver->dbd->ddl_class->table_exists($class); |
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| 32 | } |
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| 33 | |
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| 34 | # Be mindful of SQLite when you modify the method. |
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| 35 | # SQLite has its own count method in its DBD. |
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| 36 | sub count { |
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| 37 | my $driver = shift; |
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| 38 | my($class, $terms, $args) = @_; |
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| 39 | |
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| 40 | my $join = $args->{join}; |
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| 41 | my $select = 'COUNT(*)'; |
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| 42 | if ($join && $join->[3]->{unique}) { |
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| 43 | my $col; |
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| 44 | if ($join->[3]{unique} =~ m/\D/) { |
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| 45 | $col = $args->{join}[3]{unique}; |
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| 46 | } else { |
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| 47 | $col = $class->properties->{primary_key}; |
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| 48 | } |
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| 49 | my $dbcol = $driver->dbd->db_column_name($class->datasource, $col); |
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| 50 | $select = "COUNT(DISTINCT $dbcol)"; |
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| 51 | } |
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| 52 | |
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| 53 | return $driver->_select_aggregate( |
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| 54 | select => $select, |
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| 55 | class => $class, |
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| 56 | terms => $terms, |
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| 57 | args => $args, |
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| 58 | override => { |
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| 59 | order => '', |
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| 60 | limit => undef, |
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| 61 | offset => undef, |
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| 62 | }, |
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| 63 | ); |
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| 64 | } |
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| 65 | |
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| 66 | sub exist { |
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| 67 | my $driver = shift; |
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| 68 | my($class, $terms, $args) = @_; |
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| 69 | |
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| 70 | return $driver->_select_aggregate( |
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| 71 | select => '1', |
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| 72 | class => $class, |
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| 73 | terms => $terms, |
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| 74 | args => $args, |
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| 75 | override => { |
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| 76 | order => '', |
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| 77 | limit => 1, |
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| 78 | offset => undef, |
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| 79 | }, |
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| 80 | ); |
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| 81 | } |
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| 82 | |
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| 83 | sub remove_all { |
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| 84 | my $driver = shift; |
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| 85 | my ($class) = @_; |
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| 86 | return $driver->direct_remove($class); |
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| 87 | } |
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| 88 | |
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| 89 | sub count_group_by { |
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| 90 | my $driver = shift; |
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| 91 | my ($class, $terms, $args) = @_; |
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| 92 | |
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| 93 | $driver->_do_group_by('COUNT(*)', @_); |
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| 94 | } |
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| 95 | |
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| 96 | sub sum_group_by { |
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| 97 | my $driver = shift; |
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| 98 | my ($class, $terms, $args) = @_; |
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| 99 | |
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| 100 | my $sum_column = delete $args->{sum}; |
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| 101 | return unless $sum_column; |
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| 102 | $sum_column = $driver->_decorate_column_name($class, $sum_column); |
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| 103 | $args->{sort} = "sum_$sum_column" unless exists $args->{sort}; |
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| 104 | $args->{direction} = 'descend' unless exists $args->{direction}; |
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| 105 | $driver->_do_group_by("SUM($sum_column) AS sum_$sum_column", @_); |
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| 106 | } |
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| 107 | |
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| 108 | sub avg_group_by { |
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| 109 | my $driver = shift; |
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| 110 | my ($class, $terms, $args) = @_; |
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| 111 | |
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| 112 | my $avg_column = delete $args->{avg}; |
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| 113 | return unless $avg_column; |
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| 114 | $avg_column = $driver->_decorate_column_name($class, $avg_column); |
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| 115 | $args->{sort} = "avg_$avg_column" unless exists $args->{sort}; |
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| 116 | $args->{direction} = 'descend' unless exists $args->{direction}; |
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| 117 | $driver->_do_group_by("AVG($avg_column) AS avg_$avg_column", @_); |
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| 118 | } |
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| 119 | |
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| 120 | sub _do_group_by { |
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| 121 | my $driver = shift; |
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| 122 | my ($agg_func, $class, $terms, $args) = @_; |
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| 123 | my $props = $class->properties; |
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| 124 | if ($args->{no_class}) { |
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| 125 | delete $terms->{$props->{class_column}}; |
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| 126 | delete $args->{no_class}; |
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| 127 | } |
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| 128 | else { |
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| 129 | $class->pre_search_scope_terms_to_class( $terms, $args ); |
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| 130 | } |
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| 131 | my $order = delete $args->{sort}; |
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| 132 | my $direction = delete $args->{direction}; |
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| 133 | my $limit = exists $args->{limit} ? delete $args->{limit} : undef; |
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| 134 | my $offset = exists $args->{offset} ? delete $args->{offset} : undef; |
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| 135 | my $stmt = $driver->prepare_statement($class, $terms, $args); |
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| 136 | |
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| 137 | ## Ugly. Maybe we need a clear_select method in D::OD::SQL? |
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| 138 | $stmt->select([]); |
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| 139 | $stmt->select_map({}); |
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| 140 | $stmt->select_map_reverse({}); |
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| 141 | |
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| 142 | $stmt->add_select($agg_func); |
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| 143 | |
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| 144 | ## This is the nastiest thing I've ever seen. The caller should really |
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| 145 | ## just give the full column name, instead, rather than having to |
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| 146 | ## loop over all of the columns to replace something like |
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| 147 | ## EXTRACT(year FROM created_on) with EXTRACT(year FROM entry_created_on). |
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| 148 | my $decorate = $stmt->field_decorator($class); |
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| 149 | |
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| 150 | my @group = map { $decorate->($_) } @{ $args->{group} }; |
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| 151 | for my $term (@group) { |
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| 152 | $stmt->add_select($term); |
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| 153 | } |
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| 154 | $stmt->group([ map { { column => $_ } } @group ]); |
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| 155 | |
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| 156 | ## Ugly. |
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| 157 | my $sql = $stmt->as_sql; |
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| 158 | |
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| 159 | ## Set statement's ORDER clause if any. |
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| 160 | if ($order) { |
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| 161 | if (! ref($order)) { |
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| 162 | $sql .= "\nORDER BY " . $decorate->($order); |
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| 163 | if ($direction) { |
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| 164 | $sql .= $direction eq 'descend' ? ' DESC' : ' ASC'; |
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| 165 | } |
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| 166 | } else { |
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| 167 | my @order; |
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| 168 | foreach my $ord (@$order) { |
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| 169 | push @order, { |
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| 170 | column => $decorate->($ord->{column}), |
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| 171 | desc => $ord->{desc}, |
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| 172 | }; |
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| 173 | } |
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| 174 | $stmt->order(\@order); |
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| 175 | $sql .= "\n" . $stmt->as_aggregate('order'); |
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| 176 | } |
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| 177 | } |
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| 178 | |
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| 179 | my $dbh = $driver->r_handle; |
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| 180 | $driver->start_query($sql, $stmt->bind); |
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| 181 | my $sth = $dbh->prepare_cached($sql); |
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| 182 | $sth->execute(@{ $stmt->bind }); |
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| 183 | |
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| 184 | my @bindvars; |
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| 185 | for (@{ $args->{group} }) { |
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| 186 | push @bindvars, \my($var); |
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| 187 | } |
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| 188 | $sth->bind_columns(undef, \my($count), @bindvars); |
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| 189 | |
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| 190 | if ($offset) { |
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| 191 | while ($offset--) { |
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| 192 | unless ($sth->fetch) { |
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| 193 | $driver->end_query($sth); |
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| 194 | return; |
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| 195 | } |
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| 196 | } |
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| 197 | } |
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| 198 | my $i = 0; |
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| 199 | return sub { |
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| 200 | unless ($sth->fetch && defined $count && (!defined $limit || ($i < $limit))) { |
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| 201 | $sth->finish; |
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| 202 | $driver->end_query($sth); |
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| 203 | return; |
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| 204 | } |
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| 205 | my @returnvals = map { $$_ } @bindvars; |
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| 206 | $i++; |
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| 207 | return($count, @returnvals); |
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| 208 | } |
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| 209 | } |
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| 210 | |
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| 211 | sub _select_aggregate { |
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| 212 | my $driver = shift; |
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| 213 | my %param = @_; |
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| 214 | |
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| 215 | my($class, $orig_terms, $orig_args) = @param{qw( class terms args )}; |
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| 216 | my $overrides = $param{override}; |
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| 217 | my $select = $param{select}; |
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| 218 | |
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| 219 | ## Handle legacy load-by-id syntax. |
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| 220 | if($orig_terms && !ref $orig_terms) { |
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| 221 | $orig_terms = { id => $orig_terms }; |
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| 222 | } |
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| 223 | |
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| 224 | ## Convert $terms and $args like we would for a search. |
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| 225 | my $terms; |
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| 226 | if (ref($orig_terms) eq 'HASH') { |
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| 227 | $terms = { %$orig_terms }; |
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| 228 | } elsif (ref($orig_terms) eq 'ARRAY') { |
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| 229 | $terms = [ @$orig_terms ]; |
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| 230 | } |
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| 231 | my $args = $orig_args ? { %$orig_args } : undef; |
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| 232 | $class->call_trigger('pre_search', $terms, $args); |
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| 233 | |
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| 234 | my $stmt = $driver->prepare_statement($class, $terms, $args); |
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| 235 | ## Remove any unnecessary clauses, because they will cause errors in |
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| 236 | ## some drivers (and they're not necessary) |
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| 237 | while(my ($clause, $value) = each %$overrides) { |
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| 238 | $stmt->$clause($value); |
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| 239 | } |
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| 240 | $stmt->select([]); |
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| 241 | my $sql = "SELECT $select\n" . $stmt->as_sql; |
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| 242 | $driver->select_one($sql, $stmt->bind); |
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| 243 | } |
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| 244 | |
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| 245 | sub _decorate_column_names_in { |
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| 246 | my $driver = shift; |
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| 247 | my ($hash, $class) = @_; |
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| 248 | |
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| 249 | my $dbd = $driver->dbd; |
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| 250 | for my $col (keys %$hash) { |
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| 251 | my $new_col = $dbd->db_column_name($class->datasource, $col); |
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| 252 | $hash->{$new_col} = delete $hash->{$col}; |
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| 253 | } |
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| 254 | |
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| 255 | return $hash; |
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| 256 | } |
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| 257 | |
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| 258 | sub _decorate_column_name { |
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| 259 | my $driver = shift; |
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| 260 | my ($class, $col) = @_; |
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| 261 | return $driver->dbd->db_column_name($class->datasource, $col); |
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| 262 | } |
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| 263 | |
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| 264 | sub prepare_statement { |
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| 265 | my $driver = shift; |
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| 266 | my($class, $terms, $orig_args) = @_; |
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| 267 | my $args = defined $orig_args ? { %$orig_args } : {}; |
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| 268 | |
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| 269 | my %stmt_args; |
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| 270 | |
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| 271 | ## Statements don't know anything about table/column name decoration, |
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| 272 | ## so for any set of column names we send the statement, we must pre- |
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| 273 | ## decorate the column names. |
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| 274 | |
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| 275 | for my $arg (qw( transform range range_incl not null not_null like binary count_distinct )) { |
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| 276 | if(exists $args->{$arg}) { |
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| 277 | my %stmt_data = %{ delete $args->{$arg} }; |
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| 278 | $driver->_decorate_column_names_in(\%stmt_data, $class); |
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| 279 | $stmt_args{$arg} = \%stmt_data; |
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| 280 | } |
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| 281 | } |
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| 282 | |
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| 283 | ## Tell the statement what's a date column. |
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| 284 | if(my $date_columns = $class->columns_of_type('datetime')) { |
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| 285 | my %date_columns_hash; |
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| 286 | @date_columns_hash{@$date_columns} = (1) x scalar @$date_columns; |
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| 287 | $driver->_decorate_column_names_in(\%date_columns_hash, $class); |
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| 288 | $stmt_args{date_columns} = \%date_columns_hash; |
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| 289 | } |
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| 290 | |
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| 291 | ## Tell the statement what's a lob column. |
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| 292 | if(my $lob_columns = $class->columns_of_type('text', 'blob')) { |
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| 293 | my %lob_columns_hash; |
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| 294 | @lob_columns_hash{@$lob_columns} = (1) x scalar @$lob_columns; |
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| 295 | $driver->_decorate_column_names_in(\%lob_columns_hash, $class); |
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| 296 | $stmt_args{lob_columns} = \%lob_columns_hash; |
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| 297 | } |
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| 298 | |
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| 299 | my $join = delete $args->{join}; |
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| 300 | |
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| 301 | ## Convert fetchonly args from legacy hashes to Data::ObjectDriver's |
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| 302 | ## expected arrays. |
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| 303 | ## TODO: handle this in MT::OD::SQL instead of converting a hash to an |
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| 304 | ## array to a hash again? |
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| 305 | if(exists $args->{fetchonly}) { |
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| 306 | if ('HASH' eq ref $args->{fetchonly}) { |
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| 307 | $args->{fetchonly} = [ keys %{ $args->{fetchonly} } ]; |
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| 308 | } |
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| 309 | } |
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| 310 | |
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| 311 | ## Make sure to include our ORDER BY field in the SELECT fields if |
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| 312 | ## we're doing a SELECT DISTINCT (for postgres). |
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| 313 | if($join && $join->[3]->{unique}) { |
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| 314 | my $sort = $args->{sort}; |
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| 315 | if (my $fonly = $args->{fetchonly}) { |
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| 316 | if (defined $sort) { |
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| 317 | unless (grep { $_ eq $sort } @$fonly) { |
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| 318 | push @$fonly, $sort; |
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| 319 | } |
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| 320 | } |
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| 321 | $args->{fetchonly} = $fonly; |
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| 322 | } |
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| 323 | |
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| 324 | my $j_sort = $join->[3]->{sort}; |
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| 325 | if (my $j_fonly = $join->[3]->{fetchonly}) { |
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| 326 | if (defined $j_sort) { |
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| 327 | unless (grep { $_ eq $j_sort } @$j_fonly) { |
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| 328 | push @$j_fonly, $j_sort; |
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| 329 | } |
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| 330 | } |
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| 331 | $join->[3]->{fetchonly} = $j_fonly; |
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| 332 | } |
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| 333 | } |
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| 334 | |
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| 335 | my $start_val = $args->{sort} ? delete $args->{start_val} : undef; |
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| 336 | |
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| 337 | my $stmt = $driver->dbd->sql_class->new(%stmt_args); |
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| 338 | |
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| 339 | ## START CORE D::OD::Driver::DBI prepare_statement |
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| 340 | my $dbd = $driver->dbd; |
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| 341 | my $tbl = $driver->table_for($class); |
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| 342 | |
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| 343 | if ($tbl) { |
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| 344 | my $cols = $class->column_names; |
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| 345 | my %fetch = $args->{fetchonly} ? |
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| 346 | (map { $_ => 1 } @{ $args->{fetchonly} }) : (); |
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| 347 | my $skip = $stmt->select_map_reverse; |
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| 348 | for my $col (@$cols) { |
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| 349 | next if $skip->{$col}; |
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| 350 | if (keys %fetch) { |
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| 351 | next unless $fetch{$col}; |
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| 352 | } |
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| 353 | my $dbcol = $dbd->db_column_name($tbl, $col); |
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| 354 | $stmt->add_select($dbcol => $col); |
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| 355 | } |
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| 356 | |
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| 357 | if ( my $alias = $orig_args->{alias} ) { |
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| 358 | $stmt->from([ "$tbl $alias" ]); |
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| 359 | } |
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| 360 | else { |
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| 361 | $stmt->from([ $tbl ]); |
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| 362 | } |
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| 363 | |
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| 364 | if (defined($terms)) { |
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| 365 | $stmt->column_mutator(sub { |
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| 366 | my ($col) = @_; |
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| 367 | my $db_col = $dbd->db_column_name($tbl, $col); |
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| 368 | if ( my $alias = $orig_args->{alias} ) { |
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| 369 | $db_col = "$alias.$db_col"; |
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| 370 | } |
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| 371 | return $db_col; |
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| 372 | }); |
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| 373 | if (ref $terms eq 'ARRAY') { |
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| 374 | $stmt->add_complex_where($terms); |
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| 375 | } |
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| 376 | else { |
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| 377 | for my $col (keys %$terms) { |
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| 378 | $stmt->add_where(join('.', $tbl, $col), $terms->{$col}); |
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| 379 | } |
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| 380 | } |
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| 381 | $stmt->column_mutator(undef); |
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| 382 | } |
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| 383 | |
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| 384 | ## Set statement's ORDER clause if any. |
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| 385 | if ($args->{sort} || $args->{direction}) { |
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| 386 | my $order = $args->{sort} || 'id'; |
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| 387 | if (! ref($order)) { |
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| 388 | my $dir = $args->{direction} && |
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| 389 | $args->{direction} eq 'descend' ? 'DESC' : 'ASC'; |
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| 390 | $stmt->order({ |
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| 391 | column => $dbd->db_column_name($tbl, $order), |
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| 392 | desc => $dir, |
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| 393 | }); |
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| 394 | } else { |
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| 395 | my @order; |
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| 396 | foreach my $ord (@$order) { |
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| 397 | push @order, { |
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| 398 | column => $dbd->db_column_name($tbl, $ord->{column}), |
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| 399 | desc => $ord->{desc}, |
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| 400 | }; |
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| 401 | } |
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| 402 | $stmt->order(\@order); |
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| 403 | } |
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| 404 | } |
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| 405 | |
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| 406 | if ( my $ft_arg = delete $args->{'freetext'} ) { |
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| 407 | my @columns = map { $dbd->db_column_name($tbl, $_) } @{ $ft_arg->{'columns'} }; |
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| 408 | $stmt->add_freetext_where( \@columns, $ft_arg->{'search_string'} ); |
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| 409 | } |
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| 410 | } |
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| 411 | $stmt->limit($args->{limit}) if $args->{limit}; |
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| 412 | $stmt->offset($args->{offset}) if $args->{offset}; |
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| 413 | |
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| 414 | if (my $terms = $args->{having}) { |
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| 415 | for my $col (keys %$terms) { |
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| 416 | $stmt->add_having($col => $terms->{$col}); |
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| 417 | } |
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| 418 | } |
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| 419 | ## END |
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| 420 | |
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| 421 | ## Keep the statement reference we're going to return with, in case |
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| 422 | ## we have to subselect from it. |
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| 423 | my $major_stmt = $stmt; |
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| 424 | |
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| 425 | ## Implement `join` arg like MT::ObjectDriver, for compatibility. |
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| 426 | if($join) { |
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| 427 | my ($j_class, $j_col, $j_terms, $j_args) = @$join; |
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| 428 | my $j_unique; |
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| 429 | if($j_unique = delete $j_args->{unique}) { |
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| 430 | $stmt->distinct(1); |
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| 431 | } |
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| 432 | |
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| 433 | ## Handle legacy load-by-ID in join. |
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| 434 | if(defined $j_terms && !ref $j_terms) { |
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| 435 | ## TODO: don't assume primary key |
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| 436 | my $key = $j_class->properties->{primary_key}; |
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| 437 | $j_terms = { $key => $j_terms }; |
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| 438 | } |
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| 439 | |
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| 440 | my $join_stmt = $driver->prepare_statement($j_class, $j_terms, $j_args); # recursive |
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| 441 | |
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| 442 | $j_args->{unique} = $j_unique if $j_unique; |
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| 443 | |
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| 444 | for my $field (qw( from where bind )) { |
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| 445 | push @{ $stmt->$field() }, @{ $join_stmt->$field() }; |
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| 446 | } |
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| 447 | $stmt->from_stmt($join_stmt->from_stmt); |
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| 448 | $stmt->limit($j_args->{limit}) if exists $j_args->{limit}; |
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| 449 | $stmt->offset($j_args->{offset}) if exists $j_args->{offset}; |
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| 450 | |
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| 451 | if($join_stmt->order) { |
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| 452 | ## Preserve the sort order. |
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| 453 | my @new_order; |
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| 454 | for my $sql_stmt ($stmt, $join_stmt) { |
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| 455 | if(my $order = $sql_stmt->order) { |
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| 456 | if('ARRAY' eq ref $order) { |
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| 457 | push @new_order, @$order; |
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| 458 | } else { |
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| 459 | push @new_order, $order; |
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| 460 | } |
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| 461 | } |
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| 462 | } |
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| 463 | $stmt->order(\@new_order); |
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| 464 | |
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| 465 | if ($stmt->distinct) { |
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| 466 | $major_stmt = $driver->dbd->sql_class->distinct_stmt($stmt); |
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| 467 | } |
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| 468 | } |
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| 469 | |
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| 470 | ## Join across the given column(s). |
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| 471 | $j_col = [$j_col] unless ref $j_col; |
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| 472 | my $tuple = $class->primary_key_tuple; |
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| 473 | COLUMN: foreach my $i (0..$#$j_col) { |
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| 474 | next unless defined $j_col->[$i]; |
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| 475 | my $t = $tuple->[$i]; |
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| 476 | my $c = $j_col->[$i]; |
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| 477 | |
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| 478 | my $where_col = $driver->_decorate_column_name($class, $t); |
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| 479 | my $dec_j_col = $driver->_decorate_column_name($j_class, $c); |
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| 480 | my $where_val = "= $dec_j_col"; |
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| 481 | $stmt->add_where($where_col, \$where_val); |
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| 482 | } |
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| 483 | } |
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| 484 | |
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| 485 | if ($start_val) { |
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| 486 | ## TODO: support complex primary keys |
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| 487 | my $col = $args->{sort} || $class->primary_key; |
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| 488 | if (ref $col eq 'ARRAY') { |
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| 489 | if (ref $col->[0] eq 'HASH') { |
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| 490 | # complex 'sort' array/hash structure |
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| 491 | foreach (@$col) { |
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| 492 | $_->{column} = $driver->_decorate_column_name($class, $_->{column}); |
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| 493 | } |
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| 494 | } else { |
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| 495 | # primary key as array of column names |
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| 496 | foreach (@$col) { |
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| 497 | $_ = $driver->_decorate_column_name($class, $_); |
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| 498 | } |
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| 499 | } |
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| 500 | } else { |
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| 501 | $col = $driver->_decorate_column_name($class, $col); |
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| 502 | } |
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| 503 | my $op = $args->{direction} eq 'descend' ? '<' : '>'; |
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| 504 | $stmt->add_where($col, { value => $start_val, op => $op }); |
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| 505 | } |
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| 506 | |
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| 507 | ## Return with this reference, because we might have wrapped $stmt in |
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| 508 | ## a subselect. |
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| 509 | return $major_stmt; |
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| 510 | } |
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| 511 | |
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| 512 | sub sql { |
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| 513 | my $driver = shift; |
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| 514 | my ($sql) = @_; |
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| 515 | my $dbh = $driver->rw_handle; |
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| 516 | if (!ref $sql) { |
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| 517 | $sql = [ $sql ]; |
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| 518 | } |
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| 519 | foreach (@$sql) { |
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| 520 | $dbh->do($_) or return $driver->last_error; |
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| 521 | } |
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| 522 | 1; |
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| 523 | } |
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| 524 | |
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| 525 | 1; |
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| 526 | __END__ |
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| 527 | |
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| 528 | =head1 NAME |
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| 529 | |
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| 530 | MT::ObjectDriver::Driver::DBI |
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| 531 | |
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| 532 | =head1 METHODS |
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| 533 | |
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| 534 | TODO |
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| 535 | |
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| 536 | =head1 AUTHOR & COPYRIGHT |
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| 537 | |
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| 538 | Please see L<MT/AUTHOR & COPYRIGHT>. |
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| 539 | |
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| 540 | =cut |
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