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 |
0446ca9c |
10 | DQ_GROUP DQ_SELECT DQ_SLICE |
bdb576cb |
11 | ); |
515523bc |
12 | |
8b4289c8 |
13 | use Moo; |
515523bc |
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 +($_ => 'in'), ('IN', 'NOT IN')), |
829906e0 |
40 | (map +($_ => '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 | |
515523bc |
84 | sub _render { |
bdb576cb |
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; |
515523bc |
101 | return [ |
102 | join |
4cea30e6 |
103 | $_[0]->identifier_sep, |
515523bc |
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/ |
515523bc |
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 ${op_name}"; |
515523bc |
142 | } |
143 | |
410dc8ab |
144 | sub _maybe_parenthesise { |
145 | my ($self, $dq) = @_; |
146 | my %parenthesise = map +($_ => 1), DQ_SELECT, DQ_SLICE; |
147 | return |
148 | ($parenthesise{$dq->{type}} |
149 | ? [ '(', $self->_render($dq), ')' ] |
150 | : $self->_render($dq)); |
151 | } |
152 | |
515523bc |
153 | sub _handle_op_type_binop { |
154 | my ($self, $op_name, $dq) = @_; |
155 | die "${op_name} registered as binary op but args contain " |
156 | .scalar(@{$dq->{args}})." entries" |
157 | unless @{$dq->{args}} == 2; |
158 | [ |
410dc8ab |
159 | $self->_maybe_parenthesise($dq->{args}[0]), |
515523bc |
160 | $op_name, |
410dc8ab |
161 | $self->_maybe_parenthesise($dq->{args}[1]), |
515523bc |
162 | ] |
163 | } |
164 | |
165 | sub _handle_op_type_unop { |
166 | my ($self, $op_name, $dq) = @_; |
167 | die "${op_name} registered as unary op but args contain " |
168 | .scalar(@{$dq->{args}})." entries" |
169 | unless @{$dq->{args}} == 1; |
170 | [ |
f8343502 |
171 | '(', |
172 | $op_name, |
173 | $self->_render($dq->{args}[0]), |
174 | ')', |
175 | ] |
176 | } |
177 | |
178 | sub _handle_op_type_unop_reverse { |
179 | my ($self, $op_name, $dq) = @_; |
180 | die "${op_name} registered as unary op but args contain " |
181 | .scalar(@{$dq->{args}})." entries" |
182 | unless @{$dq->{args}} == 1; |
183 | [ |
515523bc |
184 | $self->_render($dq->{args}[0]), |
f8343502 |
185 | $op_name, |
515523bc |
186 | ] |
187 | } |
188 | |
189 | sub _handle_op_type_flatten { |
190 | my ($self, $op_name, $dq) = @_; |
191 | my @argq = @{$dq->{args}}; |
192 | my @arg_final; |
193 | while (my $arg = shift @argq) { |
194 | |
195 | unless ($arg->{type} eq DQ_OPERATOR) { |
196 | push @arg_final, $arg; |
197 | next; |
198 | } |
199 | |
200 | my $op = $arg->{operator}; |
12e6eab8 |
201 | unless (exists $op->{$self->_operator_type}) { |
202 | $op->{$self->_operator_type} = $self->_convert_op($arg); |
515523bc |
203 | } |
204 | |
12e6eab8 |
205 | if ($op->{$self->_operator_type} eq $op_name) { |
515523bc |
206 | unshift @argq, @{$arg->{args}}; |
207 | } else { |
208 | push @arg_final, $arg; |
209 | } |
210 | } |
9d8243ac |
211 | [ '(', |
212 | intersperse( |
213 | $self->_format_keyword($op_name), |
410dc8ab |
214 | map $self->_maybe_parenthesise($_), @arg_final |
9d8243ac |
215 | ), |
216 | ')' |
217 | ]; |
515523bc |
218 | } |
219 | |
f8343502 |
220 | sub _handle_op_type_in { |
221 | my ($self, $op, $dq) = @_; |
222 | my ($lhs, @in) = @{$dq->{args}}; |
9d8243ac |
223 | [ $self->_render($lhs), |
224 | $op, |
225 | '(', |
226 | intersperse(',', map $self->_render($_), @in), |
227 | ')' |
228 | ]; |
f8343502 |
229 | } |
230 | |
231 | sub _handle_op_type_between { |
232 | my ($self, $op_name, $dq) = @_; |
f3f803da |
233 | my @args = @{$dq->{args}}; |
234 | if (@args == 3) { |
410dc8ab |
235 | my ($lhs, $rhs1, $rhs2) = (map $self->_maybe_parenthesise($_), @args); |
839687b2 |
236 | [ '(', $lhs, $op_name, $rhs1, 'AND', $rhs2, ')' ]; |
f3f803da |
237 | } elsif (@args == 2 and $args[1]->{type} eq DQ_LITERAL) { |
238 | my ($lhs, $rhs) = (map $self->_render($_), @args); |
839687b2 |
239 | [ '(', $lhs, $op_name, $rhs, ')' ]; |
f3f803da |
240 | } else { |
241 | die "Invalid args for between: ${\scalar @args} given"; |
242 | } |
f8343502 |
243 | } |
244 | |
829906e0 |
245 | sub _handle_op_type_apply { |
246 | my ($self, $op_name, $dq) = @_; |
247 | my ($func, @args) = @{$dq->{args}}; |
248 | die "Function name must be identifier" |
249 | unless $func->{type} eq DQ_IDENTIFIER; |
54a46537 |
250 | my $ident = do { |
251 | # The problem we have here is that built-ins can't be quoted, generally. |
252 | # I rather wonder if things like MAX(...) need to -not- be handled as |
253 | # an apply and instead of something else, maybe a parenop type - but |
254 | # as an explicitly Naive renderer this seems like a reasonable answer. |
255 | local @{$self}{qw(reserved_ident_parts always_quote)}; |
256 | $self->_render_identifier($func)->[0]; |
257 | }; |
829906e0 |
258 | [ |
259 | "$ident(", |
410dc8ab |
260 | intersperse(',', map $self->_maybe_parenthesise($_), @args), |
829906e0 |
261 | ')' |
262 | ] |
263 | } |
264 | |
515523bc |
265 | sub _convert_op { |
266 | my ($self, $dq) = @_; |
267 | if (my $perl_op = $dq->{'operator'}->{'Perl'}) { |
268 | for ($perl_op) { |
269 | $_ eq '==' and return '='; |
270 | $_ eq 'eq' and return '='; |
271 | $_ eq '!' and return 'NOT'; |
272 | } |
273 | return uc $perl_op; # hope! |
274 | } |
275 | die "Can't convert non-perl op yet"; |
276 | } |
9c8fc055 |
277 | |
278 | sub _render_select { |
279 | my ($self, $dq) = @_; |
280 | die "Empty select list" unless @{$dq->{select}}; |
281 | |
282 | # it is, in fact, completely valid for there to be nothing for us |
283 | # to project from since many databases handle 'SELECT 1;' fine |
284 | |
9d8243ac |
285 | my @select = intersperse(',', |
286 | map +($_->{type} eq DQ_ALIAS |
287 | ? $self->_render_alias($_, $self->_format_keyword('AS')) |
288 | : $self->_render($_)), @{$dq->{select}} |
289 | ); |
9c8fc055 |
290 | |
291 | return [ |
292 | $self->_format_keyword('SELECT'), |
293 | \@select, |
294 | # if present this may be a bare FROM, a FROM+WHERE, or a FROM+WHERE+GROUP |
295 | # since we're the SELECT and therefore always come first, we don't care. |
2cf0bb42 |
296 | ($dq->{from} |
297 | ? ($self->_format_keyword('FROM'), @{$self->_render($dq->{from})}) |
298 | : () |
0446ca9c |
299 | ), |
2cf0bb42 |
300 | ]; |
301 | } |
302 | |
303 | sub _render_alias { |
bdb576cb |
304 | my ($self, $dq, $as) = @_; |
2cf0bb42 |
305 | # FROM foo foo -> FROM foo |
306 | # FROM foo.bar bar -> FROM foo.bar |
07b0f7e0 |
307 | if ($self->collapse_aliases) { |
308 | if ($dq->{from}{type} eq DQ_IDENTIFIER) { |
309 | if ($dq->{from}{elements}[-1] eq $dq->{to}) { |
310 | return $self->_render($dq->{from}); |
311 | } |
2cf0bb42 |
312 | } |
313 | } |
0446ca9c |
314 | my %parenthesise = map +($_ => 1), DQ_SELECT, DQ_SLICE; |
315 | return [ # XXX not sure this is the right place to detect this |
410dc8ab |
316 | $self->_maybe_parenthesise($dq->{from}), |
bdb576cb |
317 | $as || ' ', |
07b0f7e0 |
318 | $self->_render_identifier({ elements => [ $dq->{to} ] }) |
2cf0bb42 |
319 | ]; |
320 | } |
321 | |
322 | sub _render_literal { |
323 | my ($self, $dq) = @_; |
324 | unless ($dq->{subtype} eq 'SQL') { |
325 | die "Can't render non-SQL literal"; |
326 | } |
e8428681 |
327 | if (defined($dq->{literal})) { |
5edb4362 |
328 | return [ |
329 | $dq->{literal}, @{$dq->{values}||[]} |
330 | ]; |
331 | } elsif ($dq->{parts}) { |
332 | return [ map $self->_render($_), @{$dq->{parts}} ]; |
333 | } else { |
334 | die "Invalid SQL literal - neither 'literal' nor 'parts' found"; |
335 | } |
9c8fc055 |
336 | } |
337 | |
bdb576cb |
338 | sub _render_join { |
339 | my ($self, $dq) = @_; |
07b0f7e0 |
340 | my ($left, $right) = @{$dq}{qw(left right)}; |
2f95eef1 |
341 | my $join = do { |
342 | if ($dq->{outer}) { |
343 | $self->_format_keyword(uc($dq->{outer}).' JOIN'); |
344 | } elsif ($dq->{on}) { |
345 | $self->_format_keyword('JOIN'); |
346 | } else { |
347 | ',' |
348 | } |
349 | }; |
f16c57e9 |
350 | my $rhs = $self->_render($right); |
2f95eef1 |
351 | [ |
f16c57e9 |
352 | $self->_render($left), $join, |
353 | ($right->{type} eq DQ_JOIN ? ('(', $rhs, ')') : $rhs), |
2f95eef1 |
354 | ($dq->{on} |
355 | ? ($self->_format_keyword('ON'), $self->_render($dq->{on})) |
356 | : ()) |
357 | ]; |
bdb576cb |
358 | } |
359 | |
7f462f86 |
360 | sub _render_where { |
361 | my ($self, $dq) = @_; |
362 | my ($from, $where) = @{$dq}{qw(from where)}; |
a1042388 |
363 | my $keyword = ($from && $from->{type} eq DQ_GROUP) ? 'HAVING' : 'WHERE'; |
7f462f86 |
364 | [ |
365 | ($from ? $self->_render($from) : ()), |
a1042388 |
366 | $self->_format_keyword($keyword), |
7f462f86 |
367 | $self->_render($where) |
368 | ] |
369 | } |
370 | |
371 | sub _render_order { |
372 | my ($self, $dq) = @_; |
373 | my @ret = ( |
374 | $self->_format_keyword('ORDER BY'), |
375 | $self->_render($dq->{by}), |
b6b6113e |
376 | ($dq->{reverse} |
377 | ? $self->_format_keyword('DESC') |
0446ca9c |
378 | : ()) |
7f462f86 |
379 | ); |
380 | my $from; |
381 | while ($from = $dq->{from}) { |
382 | last unless $from->{type} eq DQ_ORDER; |
383 | $dq = $from; |
384 | push @ret, ( |
385 | ',', |
386 | $self->_render($dq->{by}), |
b6b6113e |
387 | ($dq->{reverse} |
388 | ? $self->_format_keyword('DESC') |
0446ca9c |
389 | : ()) |
7f462f86 |
390 | ); |
391 | } |
392 | unshift @ret, $self->_render($from) if $from; |
393 | \@ret; |
394 | } |
395 | |
a1042388 |
396 | sub _render_group { |
397 | my ($self, $dq) = @_; |
398 | # this could also squash like order does. but I dunno whether that should |
399 | # move somewhere else just yet. |
400 | my @ret = ( |
401 | ($dq->{from} ? $self->_render($dq->{from}) : ()), |
a010d224 |
402 | (@{$dq->{by}} |
403 | ? ( |
404 | $self->_format_keyword('GROUP BY'), |
405 | intersperse(',', map $self->_render($_), @{$dq->{by}}) |
406 | ) |
407 | : ()) |
a1042388 |
408 | ); |
409 | \@ret; |
410 | } |
411 | |
dc657ce1 |
412 | sub _render_delete { |
413 | my ($self, $dq) = @_; |
87867dad |
414 | my ($target, $where) = @{$dq}{qw(target where)}; |
415 | [ $self->_format_keyword('DELETE FROM'), |
416 | $self->_render($target), |
417 | ($where |
418 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
419 | : ()) |
420 | ]; |
421 | } |
422 | |
423 | sub _render_update { |
424 | my ($self, $dq) = @_; |
425 | my ($target, $set, $where) = @{$dq}{qw(target set where)}; |
a5c0a2d5 |
426 | unless ($set) { |
427 | die "Must have set key - names+value keys not yet tested"; |
428 | my ($names, $value) = @{$dq}{qw(names value)}; |
429 | die "Must have names and value or set" unless $names and $value; |
430 | die "names and value must be same size" unless @$names == @$value; |
431 | $set = [ map [ $names->[$_], $value->[$_] ], 0..$#$names ]; |
432 | } |
87867dad |
433 | my @rendered_set = intersperse( |
434 | ',', map [ intersperse('=', map $self->_render($_), @$_) ], @{$set} |
435 | ); |
436 | [ $self->_format_keyword('UPDATE'), |
437 | $self->_render($target), |
438 | $self->_format_keyword('SET'), |
439 | @rendered_set, |
440 | ($where |
441 | ? ($self->_format_keyword('WHERE'), $self->_render($where)) |
442 | : ()) |
443 | ]; |
dc657ce1 |
444 | } |
445 | |
a5c0a2d5 |
446 | sub _render_insert { |
447 | my ($self, $dq) = @_; |
448 | my ($target, $names, $values, $returning) |
449 | = @{$dq}{qw(target names values returning)}; |
450 | unless ($values) { |
451 | die "Must have values key - sets key not yet implemented"; |
452 | } |
453 | [ $self->_format_keyword('INSERT INTO'), |
454 | $self->_render($target), |
455 | ($names |
456 | ? ('(', intersperse(',', map $self->_render($_), @$names), ')') |
457 | : ()), |
458 | $self->_format_keyword('VALUES'), |
459 | intersperse(',', |
460 | map [ '(', intersperse(',', map $self->_render($_), @$_), ')' ], |
461 | @$values |
462 | ), |
463 | ($returning |
464 | ? ($self->_format_keyword('RETURNING'), |
465 | intersperse(',', map $self->_render($_), @$returning)) |
466 | : ()), |
467 | ]; |
468 | } |
469 | |
515523bc |
470 | 1; |