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'); |
515523bc |
26 | |
4cea30e6 |
27 | has lc_keywords => (is => 'ro', default => sub { 0 }); |
28 | |
29 | has always_quote => (is => 'ro', default => sub { 0 }); |
30 | |
07b0f7e0 |
31 | has collapse_aliases => (is => 'ro', default => sub { 1 }); |
32 | |
515523bc |
33 | sub _default_simple_ops { |
34 | +{ |
f8343502 |
35 | (map +($_ => 'binop'), qw(= > < >= <= != LIKE), 'NOT LIKE' ), |
36 | (map +($_ => 'unop'), qw(NOT) ), |
37 | (map +($_ => 'unop_reverse'), ('IS NULL', 'IS NOT NULL')), |
515523bc |
38 | (map +($_ => 'flatten'), qw(AND OR) ), |
f8343502 |
39 | (map +($_ => 'in'), ('IN', 'NOT IN')), |
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40 | (map +($_ => 'between'), ('BETWEEN', 'NOT BETWEEN')), |
41 | (apply => 'apply'), |
515523bc |
42 | } |
43 | } |
44 | |
45 | sub render { |
46 | my $self = shift; |
47 | $self->_flatten_structure($self->_render(@_)) |
48 | } |
49 | |
50 | sub _flatten_structure { |
51 | my ($self, $struct) = @_; |
52 | my @bind; |
bdb576cb |
53 | [ do { |
54 | my @p = map { |
55 | my $r = ref; |
56 | if (!$r) { $_ } |
57 | elsif ($r eq 'ARRAY') { |
58 | my ($sql, @b) = @{$self->_flatten_structure($_)}; |
59 | push @bind, @b; |
60 | $sql; |
61 | } |
62 | elsif ($r eq 'HASH') { push @bind, $_; () } |
63 | else { die "_flatten_structure can't handle ref type $r for $_" } |
64 | } @$struct; |
65 | join '', map { |
66 | ($p[$_], (($p[$_+1]||',') eq ',') ? () : (' ')) |
67 | } 0 .. $#p; |
68 | }, |
69 | @bind |
70 | ]; |
515523bc |
71 | } |
72 | |
04d30ecb |
73 | # I presented this to permit strange people to easily supply a patch to lc() |
9c8fc055 |
74 | # their keywords, as I have heard many desire to do, lest they infect me |
75 | # with whatever malady caused this desire by their continued proximity for |
76 | # want of such a feature. |
04d30ecb |
77 | # |
78 | # Then I realised that SQL::Abstract compatibility work required it. |
79 | # |
80 | # FEH. |
9c8fc055 |
81 | |
4cea30e6 |
82 | sub _format_keyword { $_[0]->lc_keywords ? lc($_[1]) : $_[1] } |
9c8fc055 |
83 | |
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84 | sub _render { |
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85 | $_[0]->${\"_render_${\(lc($_[1]->{type})||'broken')}"}($_[1]); |
86 | } |
87 | |
88 | sub _render_broken { |
89 | my ($self, $dq) = @_; |
90 | require Data::Dumper::Concise; |
91 | die "Broken DQ entry: ".Data::Dumper::Concise::Dumper($dq); |
515523bc |
92 | } |
93 | |
94 | sub _render_identifier { |
95 | die "Unidentified identifier (SQL can no has \$_)" |
96 | unless my @i = @{$_[1]->{elements}}; |
97 | # handle single or paired quote chars |
8b4289c8 |
98 | my ($q1, $q2) = @{$_[0]->quote_chars}[0,-1]; |
4cea30e6 |
99 | my $always_quote = $_[0]->always_quote; |
8b4289c8 |
100 | my $res_check = $_[0]->reserved_ident_parts; |
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101 | return [ |
102 | join |
4cea30e6 |
103 | $_[0]->identifier_sep, |
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104 | map +( |
105 | $_ eq '*' # Yes, this means you can't have a column just called '*'. |
106 | ? $_ # Yes, this is a feature. Go shoot the DBA if he disagrees. |
107 | : ( # reserved are stored uc, quote if non-word |
713f29aa |
108 | ($always_quote and $q1) || $res_check->{+uc} || /\W/ |
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109 | ? $q1.$_.$q2 |
110 | : $_ |
111 | ) |
112 | ), @i |
113 | ]; |
114 | } |
115 | |
116 | sub _render_value { |
a5c0a2d5 |
117 | [ '?', $_[1] ] |
515523bc |
118 | } |
119 | |
12e6eab8 |
120 | sub _operator_type { 'SQL.Naive' } |
121 | |
515523bc |
122 | sub _render_operator { |
123 | my ($self, $dq) = @_; |
124 | my $op = $dq->{operator}; |
12e6eab8 |
125 | unless (exists $op->{$self->_operator_type}) { |
126 | $op->{$self->_operator_type} = $self->_convert_op($dq); |
515523bc |
127 | } |
f8343502 |
128 | my $op_name = $op->{$self->_operator_type}; |
d17f527f |
129 | if (my $op_type = $self->simple_ops->{$op_name}) { |
515523bc |
130 | return $self->${\"_handle_op_type_${op_type}"}($op_name, $dq); |
f8343502 |
131 | } elsif (my $meth = $self->can("_handle_op_special_${op_name}")) { |
132 | return $self->$meth($dq); |
515523bc |
133 | } |
6e055841 |
134 | if (my $argc = @{$dq->{args}}) { |
135 | if ($argc == 1) { |
136 | return $self->_handle_op_type_unop($op_name, $dq); |
137 | } elsif ($argc == 2) { |
138 | return $self->_handle_op_type_binop($op_name, $dq); |
139 | } |
140 | } |
141 | die "Unsure how to handle ${op_name}"; |
515523bc |
142 | } |
143 | |
144 | sub _handle_op_type_binop { |
145 | my ($self, $op_name, $dq) = @_; |
146 | die "${op_name} registered as binary op but args contain " |
147 | .scalar(@{$dq->{args}})." entries" |
148 | unless @{$dq->{args}} == 2; |
149 | [ |
150 | $self->_render($dq->{args}[0]), |
151 | $op_name, |
152 | $self->_render($dq->{args}[1]), |
153 | ] |
154 | } |
155 | |
156 | sub _handle_op_type_unop { |
157 | my ($self, $op_name, $dq) = @_; |
158 | die "${op_name} registered as unary op but args contain " |
159 | .scalar(@{$dq->{args}})." entries" |
160 | unless @{$dq->{args}} == 1; |
161 | [ |
f8343502 |
162 | '(', |
163 | $op_name, |
164 | $self->_render($dq->{args}[0]), |
165 | ')', |
166 | ] |
167 | } |
168 | |
169 | sub _handle_op_type_unop_reverse { |
170 | my ($self, $op_name, $dq) = @_; |
171 | die "${op_name} registered as unary op but args contain " |
172 | .scalar(@{$dq->{args}})." entries" |
173 | unless @{$dq->{args}} == 1; |
174 | [ |
515523bc |
175 | $self->_render($dq->{args}[0]), |
f8343502 |
176 | $op_name, |
515523bc |
177 | ] |
178 | } |
179 | |
180 | sub _handle_op_type_flatten { |
181 | my ($self, $op_name, $dq) = @_; |
182 | my @argq = @{$dq->{args}}; |
183 | my @arg_final; |
184 | while (my $arg = shift @argq) { |
185 | |
186 | unless ($arg->{type} eq DQ_OPERATOR) { |
187 | push @arg_final, $arg; |
188 | next; |
189 | } |
190 | |
191 | my $op = $arg->{operator}; |
12e6eab8 |
192 | unless (exists $op->{$self->_operator_type}) { |
193 | $op->{$self->_operator_type} = $self->_convert_op($arg); |
515523bc |
194 | } |
195 | |
12e6eab8 |
196 | if ($op->{$self->_operator_type} eq $op_name) { |
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197 | unshift @argq, @{$arg->{args}}; |
198 | } else { |
199 | push @arg_final, $arg; |
200 | } |
201 | } |
9d8243ac |
202 | [ '(', |
203 | intersperse( |
204 | $self->_format_keyword($op_name), |
205 | map $self->_render($_), @arg_final |
206 | ), |
207 | ')' |
208 | ]; |
515523bc |
209 | } |
210 | |
f8343502 |
211 | sub _handle_op_type_in { |
212 | my ($self, $op, $dq) = @_; |
213 | my ($lhs, @in) = @{$dq->{args}}; |
9d8243ac |
214 | [ $self->_render($lhs), |
215 | $op, |
216 | '(', |
217 | intersperse(',', map $self->_render($_), @in), |
218 | ')' |
219 | ]; |
f8343502 |
220 | } |
221 | |
222 | sub _handle_op_type_between { |
223 | my ($self, $op_name, $dq) = @_; |
f3f803da |
224 | my @args = @{$dq->{args}}; |
225 | if (@args == 3) { |
226 | my ($lhs, $rhs1, $rhs2) = (map $self->_render($_), @args); |
839687b2 |
227 | [ '(', $lhs, $op_name, $rhs1, 'AND', $rhs2, ')' ]; |
f3f803da |
228 | } elsif (@args == 2 and $args[1]->{type} eq DQ_LITERAL) { |
229 | my ($lhs, $rhs) = (map $self->_render($_), @args); |
839687b2 |
230 | [ '(', $lhs, $op_name, $rhs, ')' ]; |
f3f803da |
231 | } else { |
232 | die "Invalid args for between: ${\scalar @args} given"; |
233 | } |
f8343502 |
234 | } |
235 | |
829906e0 |
236 | sub _handle_op_type_apply { |
237 | my ($self, $op_name, $dq) = @_; |
238 | my ($func, @args) = @{$dq->{args}}; |
239 | die "Function name must be identifier" |
240 | unless $func->{type} eq DQ_IDENTIFIER; |
54a46537 |
241 | my $ident = do { |
242 | # The problem we have here is that built-ins can't be quoted, generally. |
243 | # I rather wonder if things like MAX(...) need to -not- be handled as |
244 | # an apply and instead of something else, maybe a parenop type - but |
245 | # as an explicitly Naive renderer this seems like a reasonable answer. |
246 | local @{$self}{qw(reserved_ident_parts always_quote)}; |
247 | $self->_render_identifier($func)->[0]; |
248 | }; |
829906e0 |
249 | [ |
250 | "$ident(", |
9d8243ac |
251 | intersperse(',', map $self->_render($_), @args), |
829906e0 |
252 | ')' |
253 | ] |
254 | } |
255 | |
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256 | sub _convert_op { |
257 | my ($self, $dq) = @_; |
258 | if (my $perl_op = $dq->{'operator'}->{'Perl'}) { |
259 | for ($perl_op) { |
260 | $_ eq '==' and return '='; |
261 | $_ eq 'eq' and return '='; |
262 | $_ eq '!' and return 'NOT'; |
263 | } |
264 | return uc $perl_op; # hope! |
265 | } |
266 | die "Can't convert non-perl op yet"; |
267 | } |
9c8fc055 |
268 | |
269 | sub _render_select { |
270 | my ($self, $dq) = @_; |
271 | die "Empty select list" unless @{$dq->{select}}; |
272 | |
273 | # it is, in fact, completely valid for there to be nothing for us |
274 | # to project from since many databases handle 'SELECT 1;' fine |
275 | |
9d8243ac |
276 | my @select = intersperse(',', |
277 | map +($_->{type} eq DQ_ALIAS |
278 | ? $self->_render_alias($_, $self->_format_keyword('AS')) |
279 | : $self->_render($_)), @{$dq->{select}} |
280 | ); |
9c8fc055 |
281 | |
282 | return [ |
283 | $self->_format_keyword('SELECT'), |
284 | \@select, |
285 | # if present this may be a bare FROM, a FROM+WHERE, or a FROM+WHERE+GROUP |
286 | # since we're the SELECT and therefore always come first, we don't care. |
2cf0bb42 |
287 | ($dq->{from} |
288 | ? ($self->_format_keyword('FROM'), @{$self->_render($dq->{from})}) |
289 | : () |
290 | ) |
291 | ]; |
292 | } |
293 | |
294 | sub _render_alias { |
bdb576cb |
295 | my ($self, $dq, $as) = @_; |
2cf0bb42 |
296 | # FROM foo foo -> FROM foo |
297 | # FROM foo.bar bar -> FROM foo.bar |
07b0f7e0 |
298 | if ($self->collapse_aliases) { |
299 | if ($dq->{from}{type} eq DQ_IDENTIFIER) { |
300 | if ($dq->{from}{elements}[-1] eq $dq->{to}) { |
301 | return $self->_render($dq->{from}); |
302 | } |
2cf0bb42 |
303 | } |
304 | } |
305 | return [ |
07b0f7e0 |
306 | $self->_render($dq->{from}), |
bdb576cb |
307 | $as || ' ', |
07b0f7e0 |
308 | $self->_render_identifier({ elements => [ $dq->{to} ] }) |
2cf0bb42 |
309 | ]; |
310 | } |
311 | |
312 | sub _render_literal { |
313 | my ($self, $dq) = @_; |
314 | unless ($dq->{subtype} eq 'SQL') { |
315 | die "Can't render non-SQL literal"; |
316 | } |
5edb4362 |
317 | if ($dq->{literal}) { |
318 | return [ |
319 | $dq->{literal}, @{$dq->{values}||[]} |
320 | ]; |
321 | } elsif ($dq->{parts}) { |
322 | return [ map $self->_render($_), @{$dq->{parts}} ]; |
323 | } else { |
324 | die "Invalid SQL literal - neither 'literal' nor 'parts' found"; |
325 | } |
9c8fc055 |
326 | } |
327 | |
bdb576cb |
328 | sub _render_join { |
329 | my ($self, $dq) = @_; |
07b0f7e0 |
330 | my ($left, $right) = @{$dq}{qw(left right)}; |
2f95eef1 |
331 | my $join = do { |
332 | if ($dq->{outer}) { |
333 | $self->_format_keyword(uc($dq->{outer}).' JOIN'); |
334 | } elsif ($dq->{on}) { |
335 | $self->_format_keyword('JOIN'); |
336 | } else { |
337 | ',' |
338 | } |
339 | }; |
340 | [ |
341 | $self->_render($left), $join, $self->_render($right), |
342 | ($dq->{on} |
343 | ? ($self->_format_keyword('ON'), $self->_render($dq->{on})) |
344 | : ()) |
345 | ]; |
bdb576cb |
346 | } |
347 | |
7f462f86 |
348 | sub _render_where { |
349 | my ($self, $dq) = @_; |
350 | my ($from, $where) = @{$dq}{qw(from where)}; |
a1042388 |
351 | my $keyword = ($from && $from->{type} eq DQ_GROUP) ? 'HAVING' : 'WHERE'; |
7f462f86 |
352 | [ |
353 | ($from ? $self->_render($from) : ()), |
a1042388 |
354 | $self->_format_keyword($keyword), |
7f462f86 |
355 | $self->_render($where) |
356 | ] |
357 | } |
358 | |
359 | sub _render_order { |
360 | my ($self, $dq) = @_; |
361 | my @ret = ( |
362 | $self->_format_keyword('ORDER BY'), |
363 | $self->_render($dq->{by}), |
364 | ($dq->{direction} ? $self->_format_keyword($dq->{direction}) : ()) |
365 | ); |
366 | my $from; |
367 | while ($from = $dq->{from}) { |
368 | last unless $from->{type} eq DQ_ORDER; |
369 | $dq = $from; |
370 | push @ret, ( |
371 | ',', |
372 | $self->_render($dq->{by}), |
373 | ($dq->{direction} ? $self->_format_keyword($dq->{direction}) : ()) |
374 | ); |
375 | } |
376 | unshift @ret, $self->_render($from) if $from; |
377 | \@ret; |
378 | } |
379 | |
a1042388 |
380 | sub _render_group { |
381 | my ($self, $dq) = @_; |
382 | # this could also squash like order does. but I dunno whether that should |
383 | # move somewhere else just yet. |
384 | my @ret = ( |
385 | ($dq->{from} ? $self->_render($dq->{from}) : ()), |
386 | $self->_format_keyword('GROUP BY'), |
387 | intersperse(',', map $self->_render($_), @{$dq->{by}}) |
388 | ); |
389 | \@ret; |
390 | } |
391 | |
dc657ce1 |
392 | sub _render_delete { |
393 | my ($self, $dq) = @_; |
87867dad |
394 | my ($target, $where) = @{$dq}{qw(target where)}; |
395 | [ $self->_format_keyword('DELETE FROM'), |
396 | $self->_render($target), |
397 | ($where |
398 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
399 | : ()) |
400 | ]; |
401 | } |
402 | |
403 | sub _render_update { |
404 | my ($self, $dq) = @_; |
405 | my ($target, $set, $where) = @{$dq}{qw(target set where)}; |
a5c0a2d5 |
406 | unless ($set) { |
407 | die "Must have set key - names+value keys not yet tested"; |
408 | my ($names, $value) = @{$dq}{qw(names value)}; |
409 | die "Must have names and value or set" unless $names and $value; |
410 | die "names and value must be same size" unless @$names == @$value; |
411 | $set = [ map [ $names->[$_], $value->[$_] ], 0..$#$names ]; |
412 | } |
87867dad |
413 | my @rendered_set = intersperse( |
414 | ',', map [ intersperse('=', map $self->_render($_), @$_) ], @{$set} |
415 | ); |
416 | [ $self->_format_keyword('UPDATE'), |
417 | $self->_render($target), |
418 | $self->_format_keyword('SET'), |
419 | @rendered_set, |
420 | ($where |
421 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
422 | : ()) |
423 | ]; |
dc657ce1 |
424 | } |
425 | |
a5c0a2d5 |
426 | sub _render_insert { |
427 | my ($self, $dq) = @_; |
428 | my ($target, $names, $values, $returning) |
429 | = @{$dq}{qw(target names values returning)}; |
430 | unless ($values) { |
431 | die "Must have values key - sets key not yet implemented"; |
432 | } |
433 | [ $self->_format_keyword('INSERT INTO'), |
434 | $self->_render($target), |
435 | ($names |
436 | ? ('(', intersperse(',', map $self->_render($_), @$names), ')') |
437 | : ()), |
438 | $self->_format_keyword('VALUES'), |
439 | intersperse(',', |
440 | map [ '(', intersperse(',', map $self->_render($_), @$_), ')' ], |
441 | @$values |
442 | ), |
443 | ($returning |
444 | ? ($self->_format_keyword('RETURNING'), |
445 | intersperse(',', map $self->_render($_), @$returning)) |
446 | : ()), |
447 | ]; |
448 | } |
449 | |
515523bc |
450 | 1; |