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; |
6b45ffe4 |
8 | use Data::Query::ExprHelpers; |
515523bc |
9 | |
8b4289c8 |
10 | use Moo; |
515523bc |
11 | |
8b4289c8 |
12 | has reserved_ident_parts => ( |
13 | is => 'ro', default => sub { |
14 | our $_DEFAULT_RESERVED ||= { map +($_ => 1), SQL::ReservedWords->words } |
15 | } |
16 | ); |
17 | |
18 | has quote_chars => (is => 'ro', default => sub { [''] }); |
19 | |
4cea30e6 |
20 | has identifier_sep => (is => 'ro', default => sub { '.' }); |
21 | |
8b4289c8 |
22 | has simple_ops => (is => 'ro', builder => '_default_simple_ops'); |
515523bc |
23 | |
4cea30e6 |
24 | has lc_keywords => (is => 'ro', default => sub { 0 }); |
25 | |
26 | has always_quote => (is => 'ro', default => sub { 0 }); |
27 | |
07b0f7e0 |
28 | has collapse_aliases => (is => 'ro', default => sub { 1 }); |
29 | |
515523bc |
30 | sub _default_simple_ops { |
31 | +{ |
f8343502 |
32 | (map +($_ => 'binop'), qw(= > < >= <= != LIKE), 'NOT LIKE' ), |
33 | (map +($_ => 'unop'), qw(NOT) ), |
34 | (map +($_ => 'unop_reverse'), ('IS NULL', 'IS NOT NULL')), |
515523bc |
35 | (map +($_ => 'flatten'), qw(AND OR) ), |
f8343502 |
36 | (map +($_ => 'in'), ('IN', 'NOT IN')), |
829906e0 |
37 | (map +($_ => 'between'), ('BETWEEN', 'NOT BETWEEN')), |
38 | (apply => 'apply'), |
515523bc |
39 | } |
40 | } |
41 | |
42 | sub render { |
43 | my $self = shift; |
44 | $self->_flatten_structure($self->_render(@_)) |
45 | } |
46 | |
47 | sub _flatten_structure { |
48 | my ($self, $struct) = @_; |
49 | my @bind; |
bdb576cb |
50 | [ do { |
51 | my @p = map { |
52 | my $r = ref; |
53 | if (!$r) { $_ } |
54 | elsif ($r eq 'ARRAY') { |
55 | my ($sql, @b) = @{$self->_flatten_structure($_)}; |
56 | push @bind, @b; |
57 | $sql; |
58 | } |
59 | elsif ($r eq 'HASH') { push @bind, $_; () } |
60 | else { die "_flatten_structure can't handle ref type $r for $_" } |
61 | } @$struct; |
62 | join '', map { |
63 | ($p[$_], (($p[$_+1]||',') eq ',') ? () : (' ')) |
64 | } 0 .. $#p; |
65 | }, |
66 | @bind |
67 | ]; |
515523bc |
68 | } |
69 | |
04d30ecb |
70 | # I presented this to permit strange people to easily supply a patch to lc() |
9c8fc055 |
71 | # their keywords, as I have heard many desire to do, lest they infect me |
72 | # with whatever malady caused this desire by their continued proximity for |
73 | # want of such a feature. |
04d30ecb |
74 | # |
75 | # Then I realised that SQL::Abstract compatibility work required it. |
76 | # |
77 | # FEH. |
9c8fc055 |
78 | |
4cea30e6 |
79 | sub _format_keyword { $_[0]->lc_keywords ? lc($_[1]) : $_[1] } |
9c8fc055 |
80 | |
515523bc |
81 | sub _render { |
bdb576cb |
82 | $_[0]->${\"_render_${\(lc($_[1]->{type})||'broken')}"}($_[1]); |
83 | } |
84 | |
85 | sub _render_broken { |
86 | my ($self, $dq) = @_; |
87 | require Data::Dumper::Concise; |
88 | die "Broken DQ entry: ".Data::Dumper::Concise::Dumper($dq); |
515523bc |
89 | } |
90 | |
91 | sub _render_identifier { |
92 | die "Unidentified identifier (SQL can no has \$_)" |
93 | unless my @i = @{$_[1]->{elements}}; |
94 | # handle single or paired quote chars |
8b4289c8 |
95 | my ($q1, $q2) = @{$_[0]->quote_chars}[0,-1]; |
4cea30e6 |
96 | my $always_quote = $_[0]->always_quote; |
8b4289c8 |
97 | my $res_check = $_[0]->reserved_ident_parts; |
515523bc |
98 | return [ |
99 | join |
4cea30e6 |
100 | $_[0]->identifier_sep, |
515523bc |
101 | map +( |
102 | $_ eq '*' # Yes, this means you can't have a column just called '*'. |
103 | ? $_ # Yes, this is a feature. Go shoot the DBA if he disagrees. |
104 | : ( # reserved are stored uc, quote if non-word |
713f29aa |
105 | ($always_quote and $q1) || $res_check->{+uc} || /\W/ |
515523bc |
106 | ? $q1.$_.$q2 |
107 | : $_ |
108 | ) |
109 | ), @i |
110 | ]; |
111 | } |
112 | |
113 | sub _render_value { |
a5c0a2d5 |
114 | [ '?', $_[1] ] |
515523bc |
115 | } |
116 | |
12e6eab8 |
117 | sub _operator_type { 'SQL.Naive' } |
118 | |
515523bc |
119 | sub _render_operator { |
120 | my ($self, $dq) = @_; |
121 | my $op = $dq->{operator}; |
12e6eab8 |
122 | unless (exists $op->{$self->_operator_type}) { |
123 | $op->{$self->_operator_type} = $self->_convert_op($dq); |
515523bc |
124 | } |
f8343502 |
125 | my $op_name = $op->{$self->_operator_type}; |
d17f527f |
126 | if (my $op_type = $self->simple_ops->{$op_name}) { |
515523bc |
127 | return $self->${\"_handle_op_type_${op_type}"}($op_name, $dq); |
f8343502 |
128 | } elsif (my $meth = $self->can("_handle_op_special_${op_name}")) { |
129 | return $self->$meth($dq); |
515523bc |
130 | } |
6e055841 |
131 | if (my $argc = @{$dq->{args}}) { |
132 | if ($argc == 1) { |
133 | return $self->_handle_op_type_unop($op_name, $dq); |
134 | } elsif ($argc == 2) { |
135 | return $self->_handle_op_type_binop($op_name, $dq); |
136 | } |
137 | } |
138 | die "Unsure how to handle ${op_name}"; |
515523bc |
139 | } |
140 | |
410dc8ab |
141 | sub _maybe_parenthesise { |
142 | my ($self, $dq) = @_; |
6b45ffe4 |
143 | for ($dq) { |
144 | return is_Select() || is_Slice() |
410dc8ab |
145 | ? [ '(', $self->_render($dq), ')' ] |
6b45ffe4 |
146 | : $self->_render($dq); |
147 | } |
410dc8ab |
148 | } |
149 | |
515523bc |
150 | sub _handle_op_type_binop { |
151 | my ($self, $op_name, $dq) = @_; |
152 | die "${op_name} registered as binary op but args contain " |
153 | .scalar(@{$dq->{args}})." entries" |
154 | unless @{$dq->{args}} == 2; |
155 | [ |
410dc8ab |
156 | $self->_maybe_parenthesise($dq->{args}[0]), |
515523bc |
157 | $op_name, |
410dc8ab |
158 | $self->_maybe_parenthesise($dq->{args}[1]), |
515523bc |
159 | ] |
160 | } |
161 | |
162 | sub _handle_op_type_unop { |
163 | my ($self, $op_name, $dq) = @_; |
164 | die "${op_name} registered as unary op but args contain " |
165 | .scalar(@{$dq->{args}})." entries" |
166 | unless @{$dq->{args}} == 1; |
167 | [ |
f8343502 |
168 | '(', |
169 | $op_name, |
170 | $self->_render($dq->{args}[0]), |
171 | ')', |
172 | ] |
173 | } |
174 | |
175 | sub _handle_op_type_unop_reverse { |
176 | my ($self, $op_name, $dq) = @_; |
177 | die "${op_name} registered as unary op but args contain " |
178 | .scalar(@{$dq->{args}})." entries" |
179 | unless @{$dq->{args}} == 1; |
180 | [ |
515523bc |
181 | $self->_render($dq->{args}[0]), |
f8343502 |
182 | $op_name, |
515523bc |
183 | ] |
184 | } |
185 | |
186 | sub _handle_op_type_flatten { |
187 | my ($self, $op_name, $dq) = @_; |
188 | my @argq = @{$dq->{args}}; |
189 | my @arg_final; |
190 | while (my $arg = shift @argq) { |
191 | |
6b45ffe4 |
192 | unless (is_Operator($arg)) { |
515523bc |
193 | push @arg_final, $arg; |
194 | next; |
195 | } |
196 | |
197 | my $op = $arg->{operator}; |
12e6eab8 |
198 | unless (exists $op->{$self->_operator_type}) { |
199 | $op->{$self->_operator_type} = $self->_convert_op($arg); |
515523bc |
200 | } |
201 | |
12e6eab8 |
202 | if ($op->{$self->_operator_type} eq $op_name) { |
515523bc |
203 | unshift @argq, @{$arg->{args}}; |
204 | } else { |
205 | push @arg_final, $arg; |
206 | } |
207 | } |
9d8243ac |
208 | [ '(', |
209 | intersperse( |
210 | $self->_format_keyword($op_name), |
410dc8ab |
211 | map $self->_maybe_parenthesise($_), @arg_final |
9d8243ac |
212 | ), |
213 | ')' |
214 | ]; |
515523bc |
215 | } |
216 | |
f8343502 |
217 | sub _handle_op_type_in { |
218 | my ($self, $op, $dq) = @_; |
219 | my ($lhs, @in) = @{$dq->{args}}; |
9d8243ac |
220 | [ $self->_render($lhs), |
221 | $op, |
222 | '(', |
223 | intersperse(',', map $self->_render($_), @in), |
224 | ')' |
225 | ]; |
f8343502 |
226 | } |
227 | |
228 | sub _handle_op_type_between { |
229 | my ($self, $op_name, $dq) = @_; |
f3f803da |
230 | my @args = @{$dq->{args}}; |
231 | if (@args == 3) { |
410dc8ab |
232 | my ($lhs, $rhs1, $rhs2) = (map $self->_maybe_parenthesise($_), @args); |
839687b2 |
233 | [ '(', $lhs, $op_name, $rhs1, 'AND', $rhs2, ')' ]; |
6b45ffe4 |
234 | } elsif (@args == 2 and is_Literal $args[1]->{type}) { |
f3f803da |
235 | my ($lhs, $rhs) = (map $self->_render($_), @args); |
839687b2 |
236 | [ '(', $lhs, $op_name, $rhs, ')' ]; |
f3f803da |
237 | } else { |
238 | die "Invalid args for between: ${\scalar @args} given"; |
239 | } |
f8343502 |
240 | } |
241 | |
829906e0 |
242 | sub _handle_op_type_apply { |
243 | my ($self, $op_name, $dq) = @_; |
244 | my ($func, @args) = @{$dq->{args}}; |
245 | die "Function name must be identifier" |
6b45ffe4 |
246 | unless is_Identifier $func; |
54a46537 |
247 | my $ident = do { |
248 | # The problem we have here is that built-ins can't be quoted, generally. |
249 | # I rather wonder if things like MAX(...) need to -not- be handled as |
250 | # an apply and instead of something else, maybe a parenop type - but |
251 | # as an explicitly Naive renderer this seems like a reasonable answer. |
252 | local @{$self}{qw(reserved_ident_parts always_quote)}; |
253 | $self->_render_identifier($func)->[0]; |
254 | }; |
829906e0 |
255 | [ |
256 | "$ident(", |
410dc8ab |
257 | intersperse(',', map $self->_maybe_parenthesise($_), @args), |
829906e0 |
258 | ')' |
259 | ] |
260 | } |
261 | |
515523bc |
262 | sub _convert_op { |
263 | my ($self, $dq) = @_; |
264 | if (my $perl_op = $dq->{'operator'}->{'Perl'}) { |
265 | for ($perl_op) { |
266 | $_ eq '==' and return '='; |
267 | $_ eq 'eq' and return '='; |
268 | $_ eq '!' and return 'NOT'; |
269 | } |
270 | return uc $perl_op; # hope! |
271 | } |
272 | die "Can't convert non-perl op yet"; |
273 | } |
9c8fc055 |
274 | |
275 | sub _render_select { |
276 | my ($self, $dq) = @_; |
277 | die "Empty select list" unless @{$dq->{select}}; |
278 | |
279 | # it is, in fact, completely valid for there to be nothing for us |
280 | # to project from since many databases handle 'SELECT 1;' fine |
281 | |
9d8243ac |
282 | my @select = intersperse(',', |
6b45ffe4 |
283 | map +(is_Alias() |
9d8243ac |
284 | ? $self->_render_alias($_, $self->_format_keyword('AS')) |
285 | : $self->_render($_)), @{$dq->{select}} |
286 | ); |
9c8fc055 |
287 | |
288 | return [ |
289 | $self->_format_keyword('SELECT'), |
290 | \@select, |
291 | # if present this may be a bare FROM, a FROM+WHERE, or a FROM+WHERE+GROUP |
292 | # since we're the SELECT and therefore always come first, we don't care. |
2cf0bb42 |
293 | ($dq->{from} |
294 | ? ($self->_format_keyword('FROM'), @{$self->_render($dq->{from})}) |
295 | : () |
0446ca9c |
296 | ), |
2cf0bb42 |
297 | ]; |
298 | } |
299 | |
300 | sub _render_alias { |
bdb576cb |
301 | my ($self, $dq, $as) = @_; |
2cf0bb42 |
302 | # FROM foo foo -> FROM foo |
303 | # FROM foo.bar bar -> FROM foo.bar |
07b0f7e0 |
304 | if ($self->collapse_aliases) { |
6b45ffe4 |
305 | if (is_Identifier(my $from = $dq->{from})) { |
306 | if ($from->{elements}[-1] eq $dq->{to}) { |
307 | return $self->_render($from); |
07b0f7e0 |
308 | } |
2cf0bb42 |
309 | } |
310 | } |
6b45ffe4 |
311 | return [ |
410dc8ab |
312 | $self->_maybe_parenthesise($dq->{from}), |
bdb576cb |
313 | $as || ' ', |
07b0f7e0 |
314 | $self->_render_identifier({ elements => [ $dq->{to} ] }) |
2cf0bb42 |
315 | ]; |
316 | } |
317 | |
318 | sub _render_literal { |
319 | my ($self, $dq) = @_; |
320 | unless ($dq->{subtype} eq 'SQL') { |
321 | die "Can't render non-SQL literal"; |
322 | } |
e8428681 |
323 | if (defined($dq->{literal})) { |
5edb4362 |
324 | return [ |
325 | $dq->{literal}, @{$dq->{values}||[]} |
326 | ]; |
327 | } elsif ($dq->{parts}) { |
328 | return [ map $self->_render($_), @{$dq->{parts}} ]; |
329 | } else { |
330 | die "Invalid SQL literal - neither 'literal' nor 'parts' found"; |
331 | } |
9c8fc055 |
332 | } |
333 | |
bdb576cb |
334 | sub _render_join { |
335 | my ($self, $dq) = @_; |
07b0f7e0 |
336 | my ($left, $right) = @{$dq}{qw(left right)}; |
2f95eef1 |
337 | my $join = do { |
338 | if ($dq->{outer}) { |
339 | $self->_format_keyword(uc($dq->{outer}).' JOIN'); |
340 | } elsif ($dq->{on}) { |
341 | $self->_format_keyword('JOIN'); |
342 | } else { |
343 | ',' |
344 | } |
345 | }; |
f16c57e9 |
346 | my $rhs = $self->_render($right); |
2f95eef1 |
347 | [ |
f16c57e9 |
348 | $self->_render($left), $join, |
6b45ffe4 |
349 | (is_Join($right) ? ('(', $rhs, ')') : $rhs), |
2f95eef1 |
350 | ($dq->{on} |
351 | ? ($self->_format_keyword('ON'), $self->_render($dq->{on})) |
352 | : ()) |
353 | ]; |
bdb576cb |
354 | } |
355 | |
7f462f86 |
356 | sub _render_where { |
357 | my ($self, $dq) = @_; |
358 | my ($from, $where) = @{$dq}{qw(from where)}; |
6b45ffe4 |
359 | my $keyword = (is_Group($from) ? 'HAVING' : 'WHERE'); |
7f462f86 |
360 | [ |
361 | ($from ? $self->_render($from) : ()), |
a1042388 |
362 | $self->_format_keyword($keyword), |
7f462f86 |
363 | $self->_render($where) |
364 | ] |
365 | } |
366 | |
367 | sub _render_order { |
368 | my ($self, $dq) = @_; |
369 | my @ret = ( |
370 | $self->_format_keyword('ORDER BY'), |
371 | $self->_render($dq->{by}), |
b6b6113e |
372 | ($dq->{reverse} |
373 | ? $self->_format_keyword('DESC') |
0446ca9c |
374 | : ()) |
7f462f86 |
375 | ); |
376 | my $from; |
377 | while ($from = $dq->{from}) { |
6b45ffe4 |
378 | last unless is_Order $from; |
7f462f86 |
379 | $dq = $from; |
380 | push @ret, ( |
381 | ',', |
382 | $self->_render($dq->{by}), |
b6b6113e |
383 | ($dq->{reverse} |
384 | ? $self->_format_keyword('DESC') |
0446ca9c |
385 | : ()) |
7f462f86 |
386 | ); |
387 | } |
388 | unshift @ret, $self->_render($from) if $from; |
389 | \@ret; |
390 | } |
391 | |
a1042388 |
392 | sub _render_group { |
393 | my ($self, $dq) = @_; |
394 | # this could also squash like order does. but I dunno whether that should |
395 | # move somewhere else just yet. |
396 | my @ret = ( |
397 | ($dq->{from} ? $self->_render($dq->{from}) : ()), |
a010d224 |
398 | (@{$dq->{by}} |
399 | ? ( |
400 | $self->_format_keyword('GROUP BY'), |
401 | intersperse(',', map $self->_render($_), @{$dq->{by}}) |
402 | ) |
403 | : ()) |
a1042388 |
404 | ); |
405 | \@ret; |
406 | } |
407 | |
dc657ce1 |
408 | sub _render_delete { |
409 | my ($self, $dq) = @_; |
87867dad |
410 | my ($target, $where) = @{$dq}{qw(target where)}; |
411 | [ $self->_format_keyword('DELETE FROM'), |
412 | $self->_render($target), |
413 | ($where |
414 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
415 | : ()) |
416 | ]; |
417 | } |
418 | |
419 | sub _render_update { |
420 | my ($self, $dq) = @_; |
421 | my ($target, $set, $where) = @{$dq}{qw(target set where)}; |
a5c0a2d5 |
422 | unless ($set) { |
423 | die "Must have set key - names+value keys not yet tested"; |
424 | my ($names, $value) = @{$dq}{qw(names value)}; |
425 | die "Must have names and value or set" unless $names and $value; |
426 | die "names and value must be same size" unless @$names == @$value; |
427 | $set = [ map [ $names->[$_], $value->[$_] ], 0..$#$names ]; |
428 | } |
87867dad |
429 | my @rendered_set = intersperse( |
430 | ',', map [ intersperse('=', map $self->_render($_), @$_) ], @{$set} |
431 | ); |
432 | [ $self->_format_keyword('UPDATE'), |
433 | $self->_render($target), |
434 | $self->_format_keyword('SET'), |
435 | @rendered_set, |
436 | ($where |
437 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
438 | : ()) |
439 | ]; |
dc657ce1 |
440 | } |
441 | |
a5c0a2d5 |
442 | sub _render_insert { |
443 | my ($self, $dq) = @_; |
444 | my ($target, $names, $values, $returning) |
445 | = @{$dq}{qw(target names values returning)}; |
446 | unless ($values) { |
447 | die "Must have values key - sets key not yet implemented"; |
448 | } |
449 | [ $self->_format_keyword('INSERT INTO'), |
450 | $self->_render($target), |
451 | ($names |
452 | ? ('(', intersperse(',', map $self->_render($_), @$names), ')') |
453 | : ()), |
454 | $self->_format_keyword('VALUES'), |
455 | intersperse(',', |
456 | map [ '(', intersperse(',', map $self->_render($_), @$_), ')' ], |
457 | @$values |
458 | ), |
459 | ($returning |
460 | ? ($self->_format_keyword('RETURNING'), |
461 | intersperse(',', map $self->_render($_), @$returning)) |
462 | : ()), |
463 | ]; |
464 | } |
465 | |
515523bc |
466 | 1; |