Commit | Line | Data |
515523bc |
1 | package Data::Query::Renderer::SQL::Naive; |
2 | |
3 | use strictures 1; |
87867dad |
4 | |
5 | sub intersperse { my $i = shift; my @i = map +($_, $i), @_; pop @i; @i } |
6 | |
515523bc |
7 | use SQL::ReservedWords; |
bdb576cb |
8 | use Data::Query::Constants qw( |
f3f803da |
9 | DQ_IDENTIFIER DQ_OPERATOR DQ_VALUE DQ_JOIN DQ_ALIAS DQ_ORDER DQ_LITERAL |
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10 | DQ_GROUP |
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11 | ); |
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12 | |
8b4289c8 |
13 | use Moo; |
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14 | |
8b4289c8 |
15 | has reserved_ident_parts => ( |
16 | is => 'ro', default => sub { |
17 | our $_DEFAULT_RESERVED ||= { map +($_ => 1), SQL::ReservedWords->words } |
18 | } |
19 | ); |
20 | |
21 | has quote_chars => (is => 'ro', default => sub { [''] }); |
22 | |
4cea30e6 |
23 | has identifier_sep => (is => 'ro', default => sub { '.' }); |
24 | |
8b4289c8 |
25 | has simple_ops => (is => 'ro', builder => '_default_simple_ops'); |
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26 | |
4cea30e6 |
27 | has lc_keywords => (is => 'ro', default => sub { 0 }); |
28 | |
29 | has always_quote => (is => 'ro', default => sub { 0 }); |
30 | |
515523bc |
31 | sub _default_simple_ops { |
32 | +{ |
f8343502 |
33 | (map +($_ => 'binop'), qw(= > < >= <= != LIKE), 'NOT LIKE' ), |
34 | (map +($_ => 'unop'), qw(NOT) ), |
35 | (map +($_ => 'unop_reverse'), ('IS NULL', 'IS NOT NULL')), |
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36 | (map +($_ => 'flatten'), qw(AND OR) ), |
f8343502 |
37 | (map +($_ => 'in'), ('IN', 'NOT IN')), |
829906e0 |
38 | (map +($_ => 'between'), ('BETWEEN', 'NOT BETWEEN')), |
39 | (apply => 'apply'), |
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40 | } |
41 | } |
42 | |
43 | sub render { |
44 | my $self = shift; |
45 | $self->_flatten_structure($self->_render(@_)) |
46 | } |
47 | |
48 | sub _flatten_structure { |
49 | my ($self, $struct) = @_; |
50 | my @bind; |
bdb576cb |
51 | [ do { |
52 | my @p = map { |
53 | my $r = ref; |
54 | if (!$r) { $_ } |
55 | elsif ($r eq 'ARRAY') { |
56 | my ($sql, @b) = @{$self->_flatten_structure($_)}; |
57 | push @bind, @b; |
58 | $sql; |
59 | } |
60 | elsif ($r eq 'HASH') { push @bind, $_; () } |
61 | else { die "_flatten_structure can't handle ref type $r for $_" } |
62 | } @$struct; |
63 | join '', map { |
64 | ($p[$_], (($p[$_+1]||',') eq ',') ? () : (' ')) |
65 | } 0 .. $#p; |
66 | }, |
67 | @bind |
68 | ]; |
515523bc |
69 | } |
70 | |
04d30ecb |
71 | # I presented this to permit strange people to easily supply a patch to lc() |
9c8fc055 |
72 | # their keywords, as I have heard many desire to do, lest they infect me |
73 | # with whatever malady caused this desire by their continued proximity for |
74 | # want of such a feature. |
04d30ecb |
75 | # |
76 | # Then I realised that SQL::Abstract compatibility work required it. |
77 | # |
78 | # FEH. |
9c8fc055 |
79 | |
4cea30e6 |
80 | sub _format_keyword { $_[0]->lc_keywords ? lc($_[1]) : $_[1] } |
9c8fc055 |
81 | |
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82 | sub _render { |
bdb576cb |
83 | $_[0]->${\"_render_${\(lc($_[1]->{type})||'broken')}"}($_[1]); |
84 | } |
85 | |
86 | sub _render_broken { |
87 | my ($self, $dq) = @_; |
88 | require Data::Dumper::Concise; |
89 | die "Broken DQ entry: ".Data::Dumper::Concise::Dumper($dq); |
515523bc |
90 | } |
91 | |
92 | sub _render_identifier { |
93 | die "Unidentified identifier (SQL can no has \$_)" |
94 | unless my @i = @{$_[1]->{elements}}; |
95 | # handle single or paired quote chars |
8b4289c8 |
96 | my ($q1, $q2) = @{$_[0]->quote_chars}[0,-1]; |
4cea30e6 |
97 | my $always_quote = $_[0]->always_quote; |
8b4289c8 |
98 | my $res_check = $_[0]->reserved_ident_parts; |
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99 | return [ |
100 | join |
4cea30e6 |
101 | $_[0]->identifier_sep, |
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102 | map +( |
103 | $_ eq '*' # Yes, this means you can't have a column just called '*'. |
104 | ? $_ # Yes, this is a feature. Go shoot the DBA if he disagrees. |
105 | : ( # reserved are stored uc, quote if non-word |
713f29aa |
106 | ($always_quote and $q1) || $res_check->{+uc} || /\W/ |
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107 | ? $q1.$_.$q2 |
108 | : $_ |
109 | ) |
110 | ), @i |
111 | ]; |
112 | } |
113 | |
114 | sub _render_value { |
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115 | [ '?', $_[1] ] |
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116 | } |
117 | |
12e6eab8 |
118 | sub _operator_type { 'SQL.Naive' } |
119 | |
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120 | sub _render_operator { |
121 | my ($self, $dq) = @_; |
122 | my $op = $dq->{operator}; |
12e6eab8 |
123 | unless (exists $op->{$self->_operator_type}) { |
124 | $op->{$self->_operator_type} = $self->_convert_op($dq); |
515523bc |
125 | } |
f8343502 |
126 | my $op_name = $op->{$self->_operator_type}; |
d17f527f |
127 | if (my $op_type = $self->simple_ops->{$op_name}) { |
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128 | return $self->${\"_handle_op_type_${op_type}"}($op_name, $dq); |
f8343502 |
129 | } elsif (my $meth = $self->can("_handle_op_special_${op_name}")) { |
130 | return $self->$meth($dq); |
515523bc |
131 | } |
6e055841 |
132 | if (my $argc = @{$dq->{args}}) { |
133 | if ($argc == 1) { |
134 | return $self->_handle_op_type_unop($op_name, $dq); |
135 | } elsif ($argc == 2) { |
136 | return $self->_handle_op_type_binop($op_name, $dq); |
137 | } |
138 | } |
139 | die "Unsure how to handle ${op_name}"; |
515523bc |
140 | } |
141 | |
142 | sub _handle_op_type_binop { |
143 | my ($self, $op_name, $dq) = @_; |
144 | die "${op_name} registered as binary op but args contain " |
145 | .scalar(@{$dq->{args}})." entries" |
146 | unless @{$dq->{args}} == 2; |
147 | [ |
148 | $self->_render($dq->{args}[0]), |
149 | $op_name, |
150 | $self->_render($dq->{args}[1]), |
151 | ] |
152 | } |
153 | |
154 | sub _handle_op_type_unop { |
155 | my ($self, $op_name, $dq) = @_; |
156 | die "${op_name} registered as unary op but args contain " |
157 | .scalar(@{$dq->{args}})." entries" |
158 | unless @{$dq->{args}} == 1; |
159 | [ |
f8343502 |
160 | '(', |
161 | $op_name, |
162 | $self->_render($dq->{args}[0]), |
163 | ')', |
164 | ] |
165 | } |
166 | |
167 | sub _handle_op_type_unop_reverse { |
168 | my ($self, $op_name, $dq) = @_; |
169 | die "${op_name} registered as unary op but args contain " |
170 | .scalar(@{$dq->{args}})." entries" |
171 | unless @{$dq->{args}} == 1; |
172 | [ |
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173 | $self->_render($dq->{args}[0]), |
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174 | $op_name, |
515523bc |
175 | ] |
176 | } |
177 | |
178 | sub _handle_op_type_flatten { |
179 | my ($self, $op_name, $dq) = @_; |
180 | my @argq = @{$dq->{args}}; |
181 | my @arg_final; |
182 | while (my $arg = shift @argq) { |
183 | |
184 | unless ($arg->{type} eq DQ_OPERATOR) { |
185 | push @arg_final, $arg; |
186 | next; |
187 | } |
188 | |
189 | my $op = $arg->{operator}; |
12e6eab8 |
190 | unless (exists $op->{$self->_operator_type}) { |
191 | $op->{$self->_operator_type} = $self->_convert_op($arg); |
515523bc |
192 | } |
193 | |
12e6eab8 |
194 | if ($op->{$self->_operator_type} eq $op_name) { |
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195 | unshift @argq, @{$arg->{args}}; |
196 | } else { |
197 | push @arg_final, $arg; |
198 | } |
199 | } |
9d8243ac |
200 | [ '(', |
201 | intersperse( |
202 | $self->_format_keyword($op_name), |
203 | map $self->_render($_), @arg_final |
204 | ), |
205 | ')' |
206 | ]; |
515523bc |
207 | } |
208 | |
f8343502 |
209 | sub _handle_op_type_in { |
210 | my ($self, $op, $dq) = @_; |
211 | my ($lhs, @in) = @{$dq->{args}}; |
9d8243ac |
212 | [ $self->_render($lhs), |
213 | $op, |
214 | '(', |
215 | intersperse(',', map $self->_render($_), @in), |
216 | ')' |
217 | ]; |
f8343502 |
218 | } |
219 | |
220 | sub _handle_op_type_between { |
221 | my ($self, $op_name, $dq) = @_; |
f3f803da |
222 | my @args = @{$dq->{args}}; |
223 | if (@args == 3) { |
224 | my ($lhs, $rhs1, $rhs2) = (map $self->_render($_), @args); |
839687b2 |
225 | [ '(', $lhs, $op_name, $rhs1, 'AND', $rhs2, ')' ]; |
f3f803da |
226 | } elsif (@args == 2 and $args[1]->{type} eq DQ_LITERAL) { |
227 | my ($lhs, $rhs) = (map $self->_render($_), @args); |
839687b2 |
228 | [ '(', $lhs, $op_name, $rhs, ')' ]; |
f3f803da |
229 | } else { |
230 | die "Invalid args for between: ${\scalar @args} given"; |
231 | } |
f8343502 |
232 | } |
233 | |
829906e0 |
234 | sub _handle_op_type_apply { |
235 | my ($self, $op_name, $dq) = @_; |
236 | my ($func, @args) = @{$dq->{args}}; |
237 | die "Function name must be identifier" |
238 | unless $func->{type} eq DQ_IDENTIFIER; |
54a46537 |
239 | my $ident = do { |
240 | # The problem we have here is that built-ins can't be quoted, generally. |
241 | # I rather wonder if things like MAX(...) need to -not- be handled as |
242 | # an apply and instead of something else, maybe a parenop type - but |
243 | # as an explicitly Naive renderer this seems like a reasonable answer. |
244 | local @{$self}{qw(reserved_ident_parts always_quote)}; |
245 | $self->_render_identifier($func)->[0]; |
246 | }; |
829906e0 |
247 | [ |
248 | "$ident(", |
9d8243ac |
249 | intersperse(',', map $self->_render($_), @args), |
829906e0 |
250 | ')' |
251 | ] |
252 | } |
253 | |
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254 | sub _convert_op { |
255 | my ($self, $dq) = @_; |
256 | if (my $perl_op = $dq->{'operator'}->{'Perl'}) { |
257 | for ($perl_op) { |
258 | $_ eq '==' and return '='; |
259 | $_ eq 'eq' and return '='; |
260 | $_ eq '!' and return 'NOT'; |
261 | } |
262 | return uc $perl_op; # hope! |
263 | } |
264 | die "Can't convert non-perl op yet"; |
265 | } |
9c8fc055 |
266 | |
267 | sub _render_select { |
268 | my ($self, $dq) = @_; |
269 | die "Empty select list" unless @{$dq->{select}}; |
270 | |
271 | # it is, in fact, completely valid for there to be nothing for us |
272 | # to project from since many databases handle 'SELECT 1;' fine |
273 | |
9d8243ac |
274 | my @select = intersperse(',', |
275 | map +($_->{type} eq DQ_ALIAS |
276 | ? $self->_render_alias($_, $self->_format_keyword('AS')) |
277 | : $self->_render($_)), @{$dq->{select}} |
278 | ); |
9c8fc055 |
279 | |
280 | return [ |
281 | $self->_format_keyword('SELECT'), |
282 | \@select, |
283 | # if present this may be a bare FROM, a FROM+WHERE, or a FROM+WHERE+GROUP |
284 | # since we're the SELECT and therefore always come first, we don't care. |
2cf0bb42 |
285 | ($dq->{from} |
286 | ? ($self->_format_keyword('FROM'), @{$self->_render($dq->{from})}) |
287 | : () |
288 | ) |
289 | ]; |
290 | } |
291 | |
292 | sub _render_alias { |
bdb576cb |
293 | my ($self, $dq, $as) = @_; |
2cf0bb42 |
294 | # FROM foo foo -> FROM foo |
295 | # FROM foo.bar bar -> FROM foo.bar |
296 | if ($dq->{alias}{type} eq DQ_IDENTIFIER) { |
297 | if ($dq->{alias}{elements}[-1] eq $dq->{as}) { |
298 | return $self->_render($dq->{alias}); |
299 | } |
300 | } |
301 | return [ |
302 | $self->_render($dq->{alias}), |
bdb576cb |
303 | $as || ' ', |
2cf0bb42 |
304 | $self->_render_identifier({ elements => [ $dq->{as} ] }) |
305 | ]; |
306 | } |
307 | |
308 | sub _render_literal { |
309 | my ($self, $dq) = @_; |
310 | unless ($dq->{subtype} eq 'SQL') { |
311 | die "Can't render non-SQL literal"; |
312 | } |
5edb4362 |
313 | if ($dq->{literal}) { |
314 | return [ |
315 | $dq->{literal}, @{$dq->{values}||[]} |
316 | ]; |
317 | } elsif ($dq->{parts}) { |
318 | return [ map $self->_render($_), @{$dq->{parts}} ]; |
319 | } else { |
320 | die "Invalid SQL literal - neither 'literal' nor 'parts' found"; |
321 | } |
9c8fc055 |
322 | } |
323 | |
bdb576cb |
324 | sub _render_join { |
325 | my ($self, $dq) = @_; |
326 | my ($left, $right) = @{$dq->{join}}; |
2f95eef1 |
327 | my $join = do { |
328 | if ($dq->{outer}) { |
329 | $self->_format_keyword(uc($dq->{outer}).' JOIN'); |
330 | } elsif ($dq->{on}) { |
331 | $self->_format_keyword('JOIN'); |
332 | } else { |
333 | ',' |
334 | } |
335 | }; |
336 | [ |
337 | $self->_render($left), $join, $self->_render($right), |
338 | ($dq->{on} |
339 | ? ($self->_format_keyword('ON'), $self->_render($dq->{on})) |
340 | : ()) |
341 | ]; |
bdb576cb |
342 | } |
343 | |
7f462f86 |
344 | sub _render_where { |
345 | my ($self, $dq) = @_; |
346 | my ($from, $where) = @{$dq}{qw(from where)}; |
a1042388 |
347 | my $keyword = ($from && $from->{type} eq DQ_GROUP) ? 'HAVING' : 'WHERE'; |
7f462f86 |
348 | [ |
349 | ($from ? $self->_render($from) : ()), |
a1042388 |
350 | $self->_format_keyword($keyword), |
7f462f86 |
351 | $self->_render($where) |
352 | ] |
353 | } |
354 | |
355 | sub _render_order { |
356 | my ($self, $dq) = @_; |
357 | my @ret = ( |
358 | $self->_format_keyword('ORDER BY'), |
359 | $self->_render($dq->{by}), |
360 | ($dq->{direction} ? $self->_format_keyword($dq->{direction}) : ()) |
361 | ); |
362 | my $from; |
363 | while ($from = $dq->{from}) { |
364 | last unless $from->{type} eq DQ_ORDER; |
365 | $dq = $from; |
366 | push @ret, ( |
367 | ',', |
368 | $self->_render($dq->{by}), |
369 | ($dq->{direction} ? $self->_format_keyword($dq->{direction}) : ()) |
370 | ); |
371 | } |
372 | unshift @ret, $self->_render($from) if $from; |
373 | \@ret; |
374 | } |
375 | |
a1042388 |
376 | sub _render_group { |
377 | my ($self, $dq) = @_; |
378 | # this could also squash like order does. but I dunno whether that should |
379 | # move somewhere else just yet. |
380 | my @ret = ( |
381 | ($dq->{from} ? $self->_render($dq->{from}) : ()), |
382 | $self->_format_keyword('GROUP BY'), |
383 | intersperse(',', map $self->_render($_), @{$dq->{by}}) |
384 | ); |
385 | \@ret; |
386 | } |
387 | |
dc657ce1 |
388 | sub _render_delete { |
389 | my ($self, $dq) = @_; |
87867dad |
390 | my ($target, $where) = @{$dq}{qw(target where)}; |
391 | [ $self->_format_keyword('DELETE FROM'), |
392 | $self->_render($target), |
393 | ($where |
394 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
395 | : ()) |
396 | ]; |
397 | } |
398 | |
399 | sub _render_update { |
400 | my ($self, $dq) = @_; |
401 | my ($target, $set, $where) = @{$dq}{qw(target set where)}; |
a5c0a2d5 |
402 | unless ($set) { |
403 | die "Must have set key - names+value keys not yet tested"; |
404 | my ($names, $value) = @{$dq}{qw(names value)}; |
405 | die "Must have names and value or set" unless $names and $value; |
406 | die "names and value must be same size" unless @$names == @$value; |
407 | $set = [ map [ $names->[$_], $value->[$_] ], 0..$#$names ]; |
408 | } |
87867dad |
409 | my @rendered_set = intersperse( |
410 | ',', map [ intersperse('=', map $self->_render($_), @$_) ], @{$set} |
411 | ); |
412 | [ $self->_format_keyword('UPDATE'), |
413 | $self->_render($target), |
414 | $self->_format_keyword('SET'), |
415 | @rendered_set, |
416 | ($where |
417 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
418 | : ()) |
419 | ]; |
dc657ce1 |
420 | } |
421 | |
a5c0a2d5 |
422 | sub _render_insert { |
423 | my ($self, $dq) = @_; |
424 | my ($target, $names, $values, $returning) |
425 | = @{$dq}{qw(target names values returning)}; |
426 | unless ($values) { |
427 | die "Must have values key - sets key not yet implemented"; |
428 | } |
429 | [ $self->_format_keyword('INSERT INTO'), |
430 | $self->_render($target), |
431 | ($names |
432 | ? ('(', intersperse(',', map $self->_render($_), @$names), ')') |
433 | : ()), |
434 | $self->_format_keyword('VALUES'), |
435 | intersperse(',', |
436 | map [ '(', intersperse(',', map $self->_render($_), @$_), ')' ], |
437 | @$values |
438 | ), |
439 | ($returning |
440 | ? ($self->_format_keyword('RETURNING'), |
441 | intersperse(',', map $self->_render($_), @$returning)) |
442 | : ()), |
443 | ]; |
444 | } |
445 | |
515523bc |
446 | 1; |