Commit | Line | Data |
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1 | use MooseX::Declare; |
2 | |
3 | class SQL::Abstract::AST::v1 extends SQL::Abstract { |
4 | |
5 | use Carp qw/croak/; |
6 | use Data::Dump qw/pp/; |
7 | |
8 | use Moose::Util::TypeConstraints; |
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9 | use MooseX::Types::Moose qw/ArrayRef Str Int Ref HashRef/; |
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10 | use MooseX::AttributeHelpers; |
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11 | use SQL::Abstract::Types qw/AST ArrayAST HashAST/; |
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12 | |
13 | clean; |
14 | |
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15 | # set things that are valid in where clauses |
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16 | override _build_where_dispatch_table { |
17 | return { |
18 | %{super()}, |
19 | -in => $self->can('_in'), |
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20 | -not_in => $self->can('_in'), |
21 | map { +"-$_" => $self->can("_$_") } qw/ |
22 | value |
23 | name |
24 | true |
25 | false |
26 | / |
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27 | }; |
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28 | } |
29 | |
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30 | method _select(HashAST $ast) { |
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31 | |
32 | } |
33 | |
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34 | method _where(ArrayAST $ast) { |
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35 | my (undef, @clauses) = @$ast; |
36 | |
37 | return 'WHERE ' . $self->_recurse_where(\@clauses); |
38 | } |
39 | |
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40 | method _order_by(ArrayAST $ast) { |
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41 | my (undef, @clauses) = @$ast; |
42 | |
43 | my @output; |
44 | |
45 | for (@clauses) { |
46 | if ($_->[0] =~ /^-(asc|desc)$/) { |
47 | my $o = $1; |
48 | push @output, $self->dispatch($_->[1]) . " " . uc($o); |
49 | next; |
50 | } |
51 | push @output, $self->dispatch($_); |
52 | } |
53 | |
54 | return "ORDER BY " . join(", ", @output); |
55 | } |
56 | |
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57 | method _name(ArrayAST $ast) { |
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58 | my (undef, @names) = @$ast; |
59 | |
60 | my $sep = $self->name_separator; |
61 | |
62 | return $sep->[0] . |
63 | join( $sep->[1] . $sep->[0], @names ) . |
64 | $sep->[1] |
65 | if (@$sep > 1); |
66 | |
67 | return join($sep->[0], @names); |
68 | } |
69 | |
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70 | method _join(HashAST $ast) { |
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71 | |
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72 | my $output = 'JOIN ' . $self->dispatch($ast->{tablespec}); |
73 | |
74 | $output .= exists $ast->{on} |
75 | ? ' ON (' . $self->_recurse_where( $ast->{on} ) |
76 | : ' USING (' .$self->dispatch($ast->{using} || croak "No 'on' or 'join' clause passed to -join"); |
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77 | |
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78 | $output .= ")"; |
79 | return $output; |
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80 | |
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81 | } |
82 | |
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83 | method _list(ArrayAST $ast) { |
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84 | my (undef, @items) = @$ast; |
85 | |
86 | return join( |
87 | $self->list_separator, |
88 | map { $self->dispatch($_) } @items); |
89 | } |
90 | |
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91 | method _alias(ArrayAST $ast) { |
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92 | my (undef, $alias, $as) = @$ast; |
93 | |
94 | return $self->dispatch($alias) . " AS $as"; |
95 | |
96 | } |
97 | |
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98 | method _value(ArrayAST $ast) { |
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99 | my ($undef, $value) = @$ast; |
100 | |
101 | $self->add_bind($value); |
102 | return "?"; |
103 | } |
104 | |
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105 | method _recurse_where(ArrayRef $clauses) { |
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106 | |
107 | my $OP = 'AND'; |
108 | my $prio = $SQL::Abstract::PRIO{and}; |
109 | my $first = $clauses->[0]; |
110 | |
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111 | if (!ref $first) { |
112 | if ($first =~ /^-(and|or)$/) { |
113 | $OP = uc($1); |
114 | $prio = $SQL::Abstract::PRIO{$1}; |
115 | shift @$clauses; |
116 | } else { |
117 | $clauses = [ $clauses ]; |
118 | } |
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119 | } |
120 | |
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121 | my $dispatch_table = $self->where_dispatch_table; |
122 | |
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123 | my @output; |
124 | foreach (@$clauses) { |
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125 | croak "invalid component in where clause: $_" unless is_ArrayRef($_); |
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126 | my $op = $_->[0]; |
127 | |
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128 | if ($op =~ /^-(and|or)$/) { |
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129 | my $sub_prio = $SQL::Abstract::PRIO{$1}; |
130 | |
131 | if ($sub_prio <= $prio) { |
132 | push @output, $self->_recurse_where($_); |
133 | } else { |
134 | push @output, '(' . $self->_recurse_where($_) . ')'; |
135 | } |
136 | } else { |
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137 | push @output, $self->_where_component($_); |
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138 | } |
139 | } |
140 | |
141 | return join(" $OP ", @output); |
142 | } |
143 | |
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144 | method _where_component(ArrayRef $ast) { |
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145 | my $op = $ast->[0]; |
146 | |
147 | if (my $code = $self->lookup_where_dispatch($op)) { |
148 | |
149 | return $code->($self, $ast); |
150 | |
151 | } |
152 | croak "'$op' is not a valid clause in a where AST" |
153 | if $op =~ /^-/; |
154 | |
155 | croak "'$op' is not a valid operator"; |
156 | |
157 | } |
158 | |
159 | |
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160 | method _binop(ArrayRef $ast) { |
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161 | my ($op, $lhs, $rhs) = @$ast; |
162 | |
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163 | join (' ', $self->_where_component($lhs), |
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164 | $self->binop_mapping($op) || croak("Unknown binary operator $op"), |
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165 | $self->_where_component($rhs) |
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166 | ); |
167 | } |
168 | |
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169 | method _in(ArrayAST $ast) { |
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170 | my ($tag, $field, @values) = @$ast; |
171 | |
172 | my $not = $tag =~ /^-not/ ? " NOT" : ""; |
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173 | |
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174 | return $self->_false if @values == 0; |
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175 | return $self->_where_component($field) . |
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176 | $not. |
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177 | " IN (" . |
178 | join(", ", map { $self->dispatch($_) } @values ) . |
179 | ")"; |
180 | } |
181 | |
182 | method _generic_func(ArrayRef $ast) { |
183 | } |
184 | |
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185 | # 'constants' that are portable across DBs |
186 | method _false($ast?) { "0 = 1" } |
187 | method _true($ast?) { "1 = 1" } |
188 | |
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189 | } |