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bbe638af |
1 | package SQL::Abstract::Clauses; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use mro 'c3'; |
6 | use base 'SQL::Abstract'; |
7 | |
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8 | BEGIN { *puke = \&SQL::Abstract::puke } |
9 | |
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10 | sub new { |
11 | shift->next::method(@_)->register_defaults |
12 | } |
13 | |
14 | sub register_defaults { |
15 | my ($self) = @_; |
16 | $self->{clauses_of}{select} = [ qw(select from where order_by) ]; |
17 | $self->{expand}{select} = sub { shift->_expand_statement(@_) }; |
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18 | $self->{render}{select} = sub { shift->_render_statement(select => @_) }; |
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19 | $self->{expand_clause}{"select.$_"} = "_expand_select_clause_$_" |
20 | for @{$self->{clauses_of}{select}}; |
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21 | $self->{clauses_of}{update} = [ qw(update set where returning) ]; |
22 | $self->{expand}{update} = sub { shift->_expand_statement(@_) }; |
23 | $self->{render}{update} = sub { shift->_render_statement(update => @_) }; |
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24 | $self->{expand_clause}{"update.$_"} = "_expand_update_clause_$_" |
25 | for @{$self->{clauses_of}{update}}; |
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26 | $self->{clauses_of}{delete} = [ qw(delete_from where returning) ]; |
27 | $self->{expand}{delete} = sub { shift->_expand_statement(@_) }; |
28 | $self->{render}{delete} = sub { shift->_render_statement(delete => @_) }; |
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29 | $self->{expand_clause}{"delete.$_"} = "_expand_delete_clause_$_" |
30 | for @{$self->{clauses_of}{delete}}; |
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31 | $self->{clauses_of}{insert} = [ |
32 | 'insert_into', 'fields', 'values', 'returning' |
33 | ]; |
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34 | $self->{expand}{insert} = sub { shift->_expand_statement(@_) }; |
35 | $self->{render}{insert} = sub { shift->_render_statement(insert => @_) }; |
36 | $self->{expand_clause}{'insert.insert_into'} = sub { |
37 | shift->expand_expr(@_, -ident); |
38 | }; |
39 | $self->{expand_clause}{'insert.returning'} = sub { |
40 | shift->_expand_maybe_list_expr(@_, -ident); |
41 | }; |
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42 | $self->{render_clause}{'insert.fields'} = sub { |
43 | return $_[0]->render_aqt({ -row => [ $_[1] ] }); |
44 | }; |
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45 | return $self; |
46 | } |
47 | |
df0f5af9 |
48 | sub _expand_select_clause_select { |
49 | my ($self, $select) = @_; |
50 | +(select => $self->_expand_maybe_list_expr($select, -ident)); |
51 | } |
52 | |
53 | sub _expand_select_clause_from { |
54 | my ($self, $from) = @_; |
55 | +(from => $self->_expand_maybe_list_expr($from, -ident)); |
56 | } |
57 | |
58 | sub _expand_select_clause_where { |
59 | my ($self, $where) = @_; |
60 | +(where => $self->expand_expr($where)); |
61 | } |
62 | |
63 | sub _expand_select_clause_order_by { |
64 | my ($self, $order_by) = @_; |
65 | +(order_by => $self->_expand_order_by($order_by)); |
66 | } |
67 | |
889fdd38 |
68 | sub _expand_update_clause_update { |
69 | my ($self, $target) = @_; |
70 | +(update => $self->expand_expr($target, -ident)); |
71 | } |
72 | |
73 | sub _expand_update_clause_set { |
74 | +(set => shift->_expand_update_set_values(@_)); |
75 | } |
76 | |
77 | sub _expand_update_clause_where { |
78 | +(where => shift->expand_expr(@_)); |
79 | } |
80 | |
81 | sub _expand_update_clause_returning { |
82 | +(returning => shift->_expand_maybe_list_expr(@_, -ident)); |
83 | } |
84 | |
44296b4e |
85 | sub _expand_delete_clause_delete_from { |
86 | +(delete_from => shift->_expand_maybe_list_expr(@_, -ident)); |
87 | } |
88 | |
89 | sub _expand_delete_clause_where { +(where => shift->expand_expr(@_)); } |
90 | |
91 | sub _expand_delete_clause_returning { |
92 | +(returning => shift->_expand_maybe_list_expr(@_, -ident)); |
93 | } |
94 | |
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95 | sub _expand_statement { |
96 | my ($self, $type, $args) = @_; |
97 | my $ec = $self->{expand_clause}; |
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98 | return +{ "-${type}" => +{ |
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99 | map { |
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100 | my $val = $args->{$_}; |
101 | if (defined($val) and my $exp = $ec->{"${type}.$_"}) { |
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102 | if ((my (@exp) = $self->$exp($val)) == 1) { |
103 | ($_ => $exp[0]) |
104 | } else { |
105 | @exp |
106 | } |
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107 | } else { |
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108 | ($_ => $val) |
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109 | } |
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110 | } sort keys %$args |
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111 | } }; |
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112 | } |
113 | |
114 | sub _render_statement { |
115 | my ($self, $type, $args) = @_; |
116 | my @parts; |
117 | foreach my $clause (@{$self->{clauses_of}{$type}}) { |
118 | next unless my $clause_expr = $args->{$clause}; |
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119 | local $self->{convert_where} = $self->{convert} if $clause eq 'where'; |
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120 | my ($sql) = my @part = do { |
121 | if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) { |
122 | $self->$rdr($clause_expr); |
123 | } else { |
124 | my ($clause_sql, @bind) = $self->render_aqt($clause_expr); |
125 | my $sql = join ' ', |
126 | $self->_sqlcase(join ' ', split '_', $clause), |
127 | $clause_sql; |
128 | ($sql, @bind); |
129 | } |
130 | }; |
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131 | next unless defined($sql) and length($sql); |
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132 | push @parts, \@part; |
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133 | } |
134 | return $self->_join_parts(' ', @parts); |
135 | } |
136 | |
81b270e7 |
137 | sub select { |
138 | my ($self, @args) = @_; |
139 | my %clauses; |
140 | @clauses{qw(from select where order_by)} = @args; |
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141 | |
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142 | # This oddity is to literalify since historically SQLA doesn't quote |
8e6988ce |
143 | # a single identifier argument, so we convert it into a literal |
144 | |
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145 | $clauses{select} = { -literal => [ $clauses{select}||'*' ] } |
146 | unless ref($clauses{select}); |
147 | |
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148 | my ($sql, @bind) = $self->render_expr({ -select => \%clauses }); |
149 | return wantarray ? ($sql, @bind) : $sql; |
150 | } |
151 | |
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152 | sub update { |
153 | my ($self, $table, $set, $where, $options) = @_; |
154 | my %clauses; |
155 | @clauses{qw(update set where)} = ($table, $set, $where); |
156 | puke "Unsupported data type specified to \$sql->update" |
157 | unless ref($clauses{set}) eq 'HASH'; |
158 | @clauses{keys %$options} = values %$options; |
159 | my ($sql, @bind) = $self->render_expr({ -update => \%clauses }); |
160 | return wantarray ? ($sql, @bind) : $sql; |
161 | } |
162 | |
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163 | sub delete { |
164 | my ($self, $table, $where, $options) = @_; |
165 | my %clauses = (delete_from => $table, where => $where, %{$options||{}}); |
166 | my ($sql, @bind) = $self->render_expr({ -delete => \%clauses }); |
167 | return wantarray ? ($sql, @bind) : $sql; |
168 | } |
169 | |
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170 | sub insert { |
171 | my ($self, $table, $data, $options) = @_; |
172 | my %clauses = (insert_into => $table, %{$options||{}}); |
173 | my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data); |
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174 | $clauses{fields} = $f_aqt if $f_aqt; |
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175 | $clauses{values} = $v_aqt; |
176 | my ($sql, @bind) = $self->render_expr({ -insert => \%clauses }); |
177 | return wantarray ? ($sql, @bind) : $sql; |
178 | } |
179 | |
bbe638af |
180 | 1; |