Commit | Line | Data |
14774be0 |
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 $ast) { |
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31 | # Default to requiring columns and from |
32 | # Once TCs give better errors, make this a SelectAST type |
33 | for (qw/columns from/) { |
34 | confess "$_ key is required (and must be an AST) to select" |
35 | unless is_ArrayAST($ast->{$_}); |
36 | } |
37 | |
38 | # Check that columns is a -list |
39 | confess "columns key should be a -list AST, not " . $ast->{columns}[0] |
40 | unless $ast->{columns}[0] eq '-list'; |
41 | |
42 | my @output = ( |
43 | "SELECT", |
44 | $self->dispatch($ast->{columns}), |
45 | "FROM", |
46 | $self->dispatch($ast->{from}) |
47 | ); |
48 | |
49 | for (qw/join/) { |
50 | if (exists $ast->{$_}) { |
51 | my $sub_ast = $ast->{$_}; |
52 | $sub_ast->{-type} = "$_" if is_HashRef($sub_ast); |
53 | confess "$_ option is not an AST" |
54 | unless is_AST($sub_ast); |
55 | |
56 | push @output, $self->dispatch($sub_ast); |
57 | } |
58 | } |
59 | |
60 | return join(' ', @output); |
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61 | } |
62 | |
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63 | method _where(ArrayAST $ast) { |
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64 | my (undef, @clauses) = @$ast; |
65 | |
66 | return 'WHERE ' . $self->_recurse_where(\@clauses); |
67 | } |
68 | |
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69 | method _order_by(ArrayAST $ast) { |
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70 | my (undef, @clauses) = @$ast; |
71 | |
72 | my @output; |
73 | |
74 | for (@clauses) { |
75 | if ($_->[0] =~ /^-(asc|desc)$/) { |
76 | my $o = $1; |
77 | push @output, $self->dispatch($_->[1]) . " " . uc($o); |
78 | next; |
79 | } |
80 | push @output, $self->dispatch($_); |
81 | } |
82 | |
83 | return "ORDER BY " . join(", ", @output); |
84 | } |
85 | |
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86 | method _name(ArrayAST $ast) { |
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87 | my (undef, @names) = @$ast; |
88 | |
89 | my $sep = $self->name_separator; |
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90 | my $quote = $self->is_quoting |
91 | ? $self->quote_chars |
92 | : [ '' ]; |
93 | |
94 | my $join = $quote->[-1] . $sep . $quote->[0]; |
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95 | |
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96 | # We dont want to quote * in [qw/me */]: `me`.* is the desired output there |
97 | # This means you can't have a field called `*`. I am willing to accept this |
98 | # situation, cos thats a really stupid thing to want. |
99 | my $post; |
100 | $post = pop @names if $names[-1] eq '*'; |
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101 | |
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102 | my $ret = |
103 | $quote->[0] . |
104 | join( $join, @names ) . |
105 | $quote->[-1]; |
106 | |
107 | $ret .= $sep . $post if defined $post; |
108 | return $ret; |
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109 | } |
110 | |
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111 | method _join(HashRef $ast) { |
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112 | |
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113 | my $output = 'JOIN ' . $self->dispatch($ast->{tablespec}); |
114 | |
115 | $output .= exists $ast->{on} |
116 | ? ' ON (' . $self->_recurse_where( $ast->{on} ) |
117 | : ' USING (' .$self->dispatch($ast->{using} || croak "No 'on' or 'join' clause passed to -join"); |
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118 | |
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119 | $output .= ")"; |
120 | return $output; |
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121 | |
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122 | } |
123 | |
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124 | method _list(ArrayAST $ast) { |
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125 | my (undef, @items) = @$ast; |
126 | |
127 | return join( |
128 | $self->list_separator, |
129 | map { $self->dispatch($_) } @items); |
130 | } |
131 | |
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132 | method _alias(ArrayAST $ast) { |
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133 | my (undef, $alias, $as) = @$ast; |
134 | |
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135 | confess "Not enough paremeters to -alias" |
136 | unless defined $as; |
137 | |
138 | # TODO: Maybe we want qq{ AS "$as"} here |
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139 | return $self->dispatch($alias) . " AS $as"; |
140 | |
141 | } |
142 | |
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143 | method _value(ArrayAST $ast) { |
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144 | my ($undef, $value) = @$ast; |
145 | |
146 | $self->add_bind($value); |
147 | return "?"; |
148 | } |
149 | |
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150 | method _recurse_where(ArrayRef $clauses) { |
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151 | |
152 | my $OP = 'AND'; |
153 | my $prio = $SQL::Abstract::PRIO{and}; |
154 | my $first = $clauses->[0]; |
155 | |
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156 | if (!ref $first) { |
157 | if ($first =~ /^-(and|or)$/) { |
158 | $OP = uc($1); |
159 | $prio = $SQL::Abstract::PRIO{$1}; |
160 | shift @$clauses; |
161 | } else { |
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162 | # If first is not a ref, and its not -and or -or, then $clauses |
163 | # contains just a single clause |
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164 | $clauses = [ $clauses ]; |
165 | } |
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166 | } |
167 | |
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168 | my $dispatch_table = $self->where_dispatch_table; |
169 | |
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170 | my @output; |
171 | foreach (@$clauses) { |
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172 | croak "invalid component in where clause: $_" unless is_ArrayRef($_); |
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173 | my $op = $_->[0]; |
174 | |
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175 | if ($op =~ /^-(and|or)$/) { |
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176 | my $sub_prio = $SQL::Abstract::PRIO{$1}; |
177 | |
178 | if ($sub_prio <= $prio) { |
179 | push @output, $self->_recurse_where($_); |
180 | } else { |
181 | push @output, '(' . $self->_recurse_where($_) . ')'; |
182 | } |
183 | } else { |
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184 | push @output, $self->_where_component($_); |
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185 | } |
186 | } |
187 | |
188 | return join(" $OP ", @output); |
189 | } |
190 | |
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191 | method _where_component(ArrayRef $ast) { |
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192 | my $op = $ast->[0]; |
193 | |
194 | if (my $code = $self->lookup_where_dispatch($op)) { |
195 | |
196 | return $code->($self, $ast); |
197 | |
198 | } |
199 | croak "'$op' is not a valid clause in a where AST" |
200 | if $op =~ /^-/; |
201 | |
202 | croak "'$op' is not a valid operator"; |
203 | |
204 | } |
205 | |
206 | |
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207 | method _binop(ArrayRef $ast) { |
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208 | my ($op, $lhs, $rhs) = @$ast; |
209 | |
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210 | join (' ', $self->_where_component($lhs), |
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211 | $self->binop_mapping($op) || croak("Unknown binary operator $op"), |
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212 | $self->_where_component($rhs) |
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213 | ); |
214 | } |
215 | |
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216 | method _in(ArrayAST $ast) { |
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217 | my ($tag, $field, @values) = @$ast; |
218 | |
219 | my $not = $tag =~ /^-not/ ? " NOT" : ""; |
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220 | |
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221 | return $self->_false if @values == 0; |
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222 | return $self->_where_component($field) . |
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223 | $not. |
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224 | " IN (" . |
225 | join(", ", map { $self->dispatch($_) } @values ) . |
226 | ")"; |
227 | } |
228 | |
229 | method _generic_func(ArrayRef $ast) { |
230 | } |
231 | |
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232 | # 'constants' that are portable across DBs |
233 | method _false($ast?) { "0 = 1" } |
234 | method _true($ast?) { "1 = 1" } |
235 | |
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236 | } |