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; |
cbcfedc1 |
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/; |
ef0d6124 |
12 | use Devel::PartialDump qw/dump/; |
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13 | |
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14 | # set things that are valid in where clauses |
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15 | override _build_expr_dispatch_table { |
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16 | return { |
17 | %{super()}, |
1b85673a |
18 | in => $self->can('_in'), |
19 | not_in => $self->can('_in'), |
1f4bd99c |
20 | between => $self->can('_between'), |
21 | not_between => $self->can('_between'), |
a464be15 |
22 | and => $self->can('_recurse_where'), |
23 | or => $self->can('_recurse_where'), |
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24 | map { +"$_" => $self->can("_$_") } qw/ |
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25 | value |
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26 | identifier |
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27 | true |
28 | false |
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29 | expr |
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30 | / |
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31 | }; |
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32 | } |
33 | |
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34 | method _select(AST $ast) { |
747f7c21 |
35 | # Default to requiring columns and from. |
36 | # DB specific ones (i.e. mysql/Pg) can not require the FROM part with a bit |
37 | # of refactoring |
38 | |
39 | for (qw/columns tablespec/) { |
40 | confess "'$_' is required in select AST with " . dump ($ast) |
41 | unless exists $ast->{$_}; |
4ee32f41 |
42 | } |
43 | |
44 | # Check that columns is a -list |
747f7c21 |
45 | confess "'columns' should be an array ref, not " . dump($ast->{columns}) |
46 | unless is_ArrayRef($ast->{columns}); |
47 | |
64c32031 |
48 | my $cols = $self->_list({-type => 'list', args => $ast->{columns} }); |
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49 | |
50 | my @output = ( |
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51 | SELECT => $cols |
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52 | ); |
53 | |
747f7c21 |
54 | push @output, FROM => $self->dispatch($ast->{tablespec}) |
55 | if exists $ast->{tablespec}; |
56 | |
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57 | if (exists $ast->{where}) { |
58 | my $sub_ast = $ast->{where}; |
59 | |
60 | confess "$_ option is not an AST: " . dump($sub_ast) |
61 | unless is_AST($sub_ast); |
62 | |
63 | push @output, "WHERE", $self->_expr($sub_ast); |
64 | } |
65 | |
66 | for (qw/group_by having order_by/) { |
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67 | if (exists $ast->{$_}) { |
68 | my $sub_ast = $ast->{$_}; |
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69 | |
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70 | confess "$_ option is not an AST or an ArrayRef: " . dump($sub_ast) |
71 | unless is_AST($sub_ast) || is_ArrayRef($sub_ast);; |
4ee32f41 |
72 | |
e68f980b |
73 | my $meth = "__$_"; |
74 | push @output, $self->$meth($sub_ast); |
4ee32f41 |
75 | } |
76 | } |
77 | |
78 | return join(' ', @output); |
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79 | } |
80 | |
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81 | method _update(AST $ast) { |
82 | |
83 | for (qw/columns values tablespec/) { |
84 | confess "'$_' is required in update AST with " . dump ($ast) |
85 | unless exists $ast->{$_}; |
86 | } |
fc20481d |
87 | |
88 | my $table = $ast->{tablespec}; |
89 | confess 'update: tablespec must be an ident or an alias in ' . dump($ast) |
90 | unless $table->{-type} =~ /^identifier|alias$/; |
91 | |
92 | my @output = ( |
93 | 'UPDATE', |
94 | $self->dispatch($table), |
95 | 'SET' |
96 | ); |
97 | |
99124578 |
98 | confess 'update: Number of values does not match columns: ' . dump($ast) |
fc20481d |
99 | if @{$ast->{columns}} != @{$ast->{values}}; |
100 | |
fc20481d |
101 | my $list = { |
102 | -type => 'list', |
103 | args => [ map { |
104 | { -type => 'expr', |
105 | op => '==', # This should really be '=' but hmmmmmmmm |
106 | args => [ |
107 | $ast->{columns}[$_], |
108 | $ast->{values}[$_] |
109 | ] |
110 | } |
111 | } 0..$#{$ast->{columns}} ] |
112 | }; |
113 | |
114 | push @output, $self->dispatch($list); |
115 | |
116 | return join(' ', @output); |
d4656fcf |
117 | |
118 | } |
119 | |
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120 | method _join(HashRef $ast) { |
d0ad3a92 |
121 | |
122 | # TODO: Validate join type |
123 | my $type = $ast->{join_type} || ""; |
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124 | |
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125 | my @output = $self->dispatch($ast->{lhs}); |
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126 | |
127 | push @output, uc $type if $type; |
f7dc4536 |
128 | push @output, "JOIN", $self->dispatch($ast->{rhs}); |
64c32031 |
129 | |
d0ad3a92 |
130 | push @output, |
131 | exists $ast->{on} |
132 | ? ('ON', '(' . $self->_expr( $ast->{on} ) . ')' ) |
924d940e |
133 | : ('USING', '(' .$self->dispatch($ast->{using} |
134 | || croak "No 'on' or 'uinsg' clause passed to join cluase: " . |
135 | dump($ast) |
136 | ) . |
d0ad3a92 |
137 | ')' ); |
64c32031 |
138 | |
d0ad3a92 |
139 | return join(" ", @output); |
64c32031 |
140 | |
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141 | } |
142 | |
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143 | method _ordering(AST $ast) { |
144 | |
145 | my $output = $self->_expr($ast->{expr}); |
146 | |
147 | $output .= " " . uc $1 |
148 | if $ast->{direction} && |
149 | ( $ast->{direction} =~ /^(asc|desc)$/i |
150 | || confess "Unknown ordering direction " . dump($ast) |
151 | ); |
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152 | |
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153 | return $output; |
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154 | } |
155 | |
627dcb62 |
156 | method _identifier(AST $ast) { |
157 | my @names = @{$ast->{elements}}; |
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158 | |
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159 | my $sep = $self->ident_separator; |
4ee32f41 |
160 | my $quote = $self->is_quoting |
161 | ? $self->quote_chars |
162 | : [ '' ]; |
163 | |
164 | my $join = $quote->[-1] . $sep . $quote->[0]; |
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165 | |
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166 | # We dont want to quote * in [qw/me */]: `me`.* is the desired output there |
167 | # This means you can't have a field called `*`. I am willing to accept this |
168 | # situation, cos thats a really stupid thing to want. |
169 | my $post; |
170 | $post = pop @names if $names[-1] eq '*'; |
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171 | |
8b398780 |
172 | my $ret; |
173 | $ret = $quote->[0] . |
174 | join( $join, @names ) . |
175 | $quote->[-1] |
176 | if @names; |
177 | |
178 | $ret = $ret |
179 | ? $ret . $sep . $post |
180 | : $post |
181 | if defined $post; |
182 | |
4ee32f41 |
183 | |
4ee32f41 |
184 | return $ret; |
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185 | } |
186 | |
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187 | |
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188 | method _list(AST $ast) { |
e6a33ce3 |
189 | return "" unless $ast->{args}; |
190 | |
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191 | my @items = is_ArrayRef($ast->{args}) |
192 | ? @{$ast->{args}} |
193 | : $ast->{args}; |
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194 | |
195 | return join( |
196 | $self->list_separator, |
197 | map { $self->dispatch($_) } @items); |
198 | } |
199 | |
747f7c21 |
200 | # TODO: I think i want to parameterized AST type to get better validation |
7a56723e |
201 | method _alias(AST $ast) { |
202 | |
4ee32f41 |
203 | # TODO: Maybe we want qq{ AS "$as"} here |
7a56723e |
204 | return $self->dispatch($ast->{ident}) . " AS " . $ast->{as}; |
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205 | |
206 | } |
207 | |
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208 | method _value(AST $ast) { |
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209 | |
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210 | $self->add_bind($ast->{value}); |
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211 | return "?"; |
212 | } |
213 | |
e68f980b |
214 | # Not dispatchable to. |
924d940e |
215 | method __having($args) { |
216 | return "HAVING " . $self->_list({-type => 'list', args => $args}); |
217 | } |
218 | |
219 | method __group_by($args) { |
220 | return "GROUP BY " . $self->_list({-type => 'list', args => $args}); |
e68f980b |
221 | } |
222 | |
924d940e |
223 | method __order_by($args) { |
224 | return "ORDER BY " . $self->_list({-type => 'list', args => $args}); |
225 | } |
226 | |
227 | |
ef0d6124 |
228 | # Perhaps badly named. handles 'and' and 'or' clauses |
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229 | method _recurse_where(AST $ast) { |
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230 | |
a464be15 |
231 | my $op = $ast->{op}; |
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232 | |
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233 | my $OP = uc $op; |
234 | my $prio = $SQL::Abstract::PRIO{$op}; |
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235 | |
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236 | my $dispatch_table = $self->expr_dispatch_table; |
0bf8a8c4 |
237 | |
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238 | my @output; |
a464be15 |
239 | foreach ( @{$ast->{args}} ) { |
bad761ba |
240 | croak "invalid component in where clause: $_" unless is_AST($_); |
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241 | |
9d7d0694 |
242 | if ($_->{-type} eq 'expr' && $_->{op} =~ /^(and|or)$/) { |
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243 | my $sub_prio = $SQL::Abstract::PRIO{$1}; |
244 | |
39f7dc30 |
245 | if ($sub_prio == $prio) { |
246 | # When the element below has same priority, i.e. 'or' as a child of |
247 | # 'or', dont produce extra brackets |
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248 | push @output, $self->_recurse_where($_); |
249 | } else { |
250 | push @output, '(' . $self->_recurse_where($_) . ')'; |
251 | } |
252 | } else { |
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253 | push @output, $self->_expr($_); |
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254 | } |
255 | } |
256 | |
257 | return join(" $OP ", @output); |
258 | } |
259 | |
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260 | method _expr(AST $ast) { |
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261 | my $op = $ast->{-type}; |
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262 | |
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263 | $op = $ast->{op} if $op eq 'expr'; |
264 | |
265 | if (my $code = $self->lookup_expr_dispatch($op)) { |
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266 | |
267 | return $code->($self, $ast); |
268 | |
269 | } |
ef0d6124 |
270 | croak "'$op' is not a valid AST type in an expression with " . dump($ast) |
271 | if $ast->{-type} ne 'expr'; |
0c371882 |
272 | |
e6a33ce3 |
273 | # This is an attempt to do some form of validation on function names. This |
274 | # might end up being a bad thing. |
275 | croak "'$op' is not a valid operator in an expression with " . dump($ast) |
276 | if $op =~ /\W/; |
277 | |
278 | return $self->_generic_function_op($ast); |
1b85673a |
279 | |
1b85673a |
280 | } |
0c371882 |
281 | |
bad761ba |
282 | method _binop(AST $ast) { |
1b85673a |
283 | my ($lhs, $rhs) = @{$ast->{args}}; |
284 | my $op = $ast->{op}; |
0bf8a8c4 |
285 | |
ec376489 |
286 | # IS NOT? NULL |
287 | if ($rhs->{-type} eq 'value' && !defined $rhs->{value} && |
288 | ($op eq '==' || $op eq '!=')) |
289 | { |
290 | return $self->_expr($lhs) . |
291 | ($op eq '==' ? " IS " : " IS NOT ") . |
292 | "NULL"; |
293 | } |
294 | |
ef0d6124 |
295 | join (' ', $self->_expr($lhs), |
0bf8a8c4 |
296 | $self->binop_mapping($op) || croak("Unknown binary operator $op"), |
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297 | $self->_expr($rhs) |
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298 | ); |
299 | } |
300 | |
e6a33ce3 |
301 | method _generic_function_op(AST $ast) { |
302 | my $op = $ast->{op}; |
303 | |
304 | return "$op(" . $self->_list($ast) . ")"; |
305 | } |
306 | |
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307 | method _in(AST $ast) { |
a464be15 |
308 | |
9d7d0694 |
309 | my ($field,@values) = @{$ast->{args}}; |
a464be15 |
310 | |
9d7d0694 |
311 | my $not = ($ast->{op} =~ /^not_/) ? " NOT" : ""; |
0bf8a8c4 |
312 | |
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313 | return $self->_false unless @values; |
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314 | |
ef0d6124 |
315 | return $self->_expr($field) . |
9d7d0694 |
316 | $not . |
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317 | " IN (" . |
9d7d0694 |
318 | join(", ", map { $self->dispatch($_) } @values ) . |
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319 | ")"; |
320 | } |
321 | |
1f4bd99c |
322 | method _between(AST $ast) { |
323 | |
324 | my ($field,@values) = @{$ast->{args}}; |
325 | |
326 | my $not = ($ast->{op} =~ /^not_/) ? " NOT" : ""; |
327 | croak "between requires 3 arguments: " . dump($ast) |
328 | unless @values == 2; |
329 | |
39f7dc30 |
330 | # The brackets are to work round an issue with SQL::A::Test |
331 | return "(" . |
332 | $self->_expr($field) . |
1f4bd99c |
333 | $not . |
334 | " BETWEEN " . |
39f7dc30 |
335 | join(" AND ", map { $self->dispatch($_) } @values ) . |
336 | ")"; |
1f4bd99c |
337 | } |
338 | |
44cfd1f6 |
339 | # 'constants' that are portable across DBs |
340 | method _false($ast?) { "0 = 1" } |
341 | method _true($ast?) { "1 = 1" } |
342 | |
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343 | } |