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1 | package SQL::Translator::Parser::SQLite; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: SQLite.pm,v 1.8 2006-06-07 16:08:45 schiffbruechige Exp $ |
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5 | # ------------------------------------------------------------------- |
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6 | # Copyright (C) 2002-4 SQLFairy Authors |
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7 | # |
8 | # This program is free software; you can redistribute it and/or |
9 | # modify it under the terms of the GNU General Public License as |
10 | # published by the Free Software Foundation; version 2. |
11 | # |
12 | # This program is distributed in the hope that it will be useful, but |
13 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | # General Public License for more details. |
16 | # |
17 | # You should have received a copy of the GNU General Public License |
18 | # along with this program; if not, write to the Free Software |
19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
20 | # 02111-1307 USA |
21 | # ------------------------------------------------------------------- |
22 | |
23 | =head1 NAME |
24 | |
25 | SQL::Translator::Parser::SQLite - parser for SQLite |
26 | |
27 | =head1 SYNOPSIS |
28 | |
29 | use SQL::Translator; |
30 | use SQL::Translator::Parser::SQLite; |
31 | |
32 | my $translator = SQL::Translator->new; |
33 | $translator->parser("SQL::Translator::Parser::SQLite"); |
34 | |
35 | =head1 DESCRIPTION |
36 | |
37 | This is a grammar for parsing CREATE statements for SQLite as |
38 | described here: |
39 | |
40 | http://www.sqlite.org/lang.html |
41 | |
42 | CREATE INDEX |
43 | |
44 | sql-statement ::= |
45 | CREATE [TEMP | TEMPORARY] [UNIQUE] INDEX index-name |
46 | ON [database-name .] table-name ( column-name [, column-name]* ) |
47 | [ ON CONFLICT conflict-algorithm ] |
48 | |
49 | column-name ::= |
50 | name [ ASC | DESC ] |
51 | |
52 | CREATE TABLE |
53 | |
54 | sql-command ::= |
55 | CREATE [TEMP | TEMPORARY] TABLE table-name ( |
56 | column-def [, column-def]* |
57 | [, constraint]* |
58 | ) |
59 | |
60 | sql-command ::= |
61 | CREATE [TEMP | TEMPORARY] TABLE table-name AS select-statement |
62 | |
63 | column-def ::= |
64 | name [type] [[CONSTRAINT name] column-constraint]* |
65 | |
66 | type ::= |
67 | typename | |
68 | typename ( number ) | |
69 | typename ( number , number ) |
70 | |
71 | column-constraint ::= |
72 | NOT NULL [ conflict-clause ] | |
73 | PRIMARY KEY [sort-order] [ conflict-clause ] | |
74 | UNIQUE [ conflict-clause ] | |
75 | CHECK ( expr ) [ conflict-clause ] | |
76 | DEFAULT value |
77 | |
78 | constraint ::= |
79 | PRIMARY KEY ( name [, name]* ) [ conflict-clause ]| |
80 | UNIQUE ( name [, name]* ) [ conflict-clause ] | |
81 | CHECK ( expr ) [ conflict-clause ] |
82 | |
83 | conflict-clause ::= |
84 | ON CONFLICT conflict-algorithm |
85 | |
86 | CREATE TRIGGER |
87 | |
88 | sql-statement ::= |
89 | CREATE [TEMP | TEMPORARY] TRIGGER trigger-name [ BEFORE | AFTER ] |
90 | database-event ON [database-name .] table-name |
91 | trigger-action |
92 | |
93 | sql-statement ::= |
94 | CREATE [TEMP | TEMPORARY] TRIGGER trigger-name INSTEAD OF |
95 | database-event ON [database-name .] view-name |
96 | trigger-action |
97 | |
98 | database-event ::= |
99 | DELETE | |
100 | INSERT | |
101 | UPDATE | |
102 | UPDATE OF column-list |
103 | |
104 | trigger-action ::= |
105 | [ FOR EACH ROW | FOR EACH STATEMENT ] [ WHEN expression ] |
106 | BEGIN |
107 | trigger-step ; [ trigger-step ; ]* |
108 | END |
109 | |
110 | trigger-step ::= |
111 | update-statement | insert-statement | |
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112 | delete-statement | select-statement |
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113 | |
114 | CREATE VIEW |
115 | |
116 | sql-command ::= |
117 | CREATE [TEMP | TEMPORARY] VIEW view-name AS select-statement |
118 | |
119 | ON CONFLICT clause |
120 | |
121 | conflict-clause ::= |
122 | ON CONFLICT conflict-algorithm |
123 | |
124 | conflict-algorithm ::= |
125 | ROLLBACK | ABORT | FAIL | IGNORE | REPLACE |
126 | |
127 | expression |
128 | |
129 | expr ::= |
130 | expr binary-op expr | |
131 | expr like-op expr | |
132 | unary-op expr | |
133 | ( expr ) | |
134 | column-name | |
135 | table-name . column-name | |
136 | database-name . table-name . column-name | |
137 | literal-value | |
138 | function-name ( expr-list | * ) | |
139 | expr (+) | |
140 | expr ISNULL | |
141 | expr NOTNULL | |
142 | expr [NOT] BETWEEN expr AND expr | |
143 | expr [NOT] IN ( value-list ) | |
144 | expr [NOT] IN ( select-statement ) | |
145 | ( select-statement ) | |
146 | CASE [expr] ( WHEN expr THEN expr )+ [ELSE expr] END |
147 | |
148 | like-op::= |
149 | LIKE | GLOB | NOT LIKE | NOT GLOB |
150 | |
151 | =cut |
152 | |
153 | use strict; |
154 | use vars qw[ $DEBUG $VERSION $GRAMMAR @EXPORT_OK ]; |
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155 | $VERSION = sprintf "%d.%02d", q$Revision: 1.8 $ =~ /(\d+)\.(\d+)/; |
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156 | $DEBUG = 0 unless defined $DEBUG; |
157 | |
158 | use Data::Dumper; |
159 | use Parse::RecDescent; |
160 | use Exporter; |
161 | use base qw(Exporter); |
162 | |
163 | @EXPORT_OK = qw(parse); |
164 | |
165 | # Enable warnings within the Parse::RecDescent module. |
166 | $::RD_ERRORS = 1; # Make sure the parser dies when it encounters an error |
167 | $::RD_WARN = 1; # Enable warnings. This will warn on unused rules &c. |
168 | $::RD_HINT = 1; # Give out hints to help fix problems. |
169 | |
170 | $GRAMMAR = q! |
171 | |
172 | { |
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173 | my ( %tables, $table_order, @table_comments, @views, @triggers ); |
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174 | } |
175 | |
176 | # |
177 | # The "eofile" rule makes the parser fail if any "statement" rule |
178 | # fails. Otherwise, the first successful match by a "statement" |
179 | # won't cause the failure needed to know that the parse, as a whole, |
180 | # failed. -ky |
181 | # |
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182 | startrule : statement(s) eofile { |
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183 | $return = { |
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184 | tables => \%tables, |
185 | views => \@views, |
186 | triggers => \@triggers, |
187 | } |
188 | } |
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189 | |
190 | eofile : /^\Z/ |
191 | |
192 | statement : begin_transaction |
193 | | commit |
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194 | | drop |
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195 | | comment |
196 | | create |
197 | | <error> |
198 | |
199 | begin_transaction : /begin transaction/i SEMICOLON |
200 | |
201 | commit : /commit/i SEMICOLON |
202 | |
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203 | drop : /drop/i TABLE <commit> table_name SEMICOLON |
204 | |
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205 | comment : /^\s*(?:#|-{2}).*\n/ |
206 | { |
207 | my $comment = $item[1]; |
208 | $comment =~ s/^\s*(#|-{2})\s*//; |
209 | $comment =~ s/\s*$//; |
210 | $return = $comment; |
211 | } |
212 | |
213 | comment : /\/\*/ /[^\*]+/ /\*\// |
214 | { |
215 | my $comment = $item[2]; |
216 | $comment =~ s/^\s*|\s*$//g; |
217 | $return = $comment; |
218 | } |
219 | |
220 | # |
221 | # Create Index |
222 | # |
223 | create : CREATE TEMPORARY(?) UNIQUE(?) INDEX WORD ON table_name parens_field_list conflict_clause(?) SEMICOLON |
224 | { |
225 | my $db_name = $item[7]->{'db_name'} || ''; |
226 | my $table_name = $item[7]->{'name'}; |
227 | |
228 | my $index = { |
229 | name => $item[5], |
230 | fields => $item[8], |
231 | on_conflict => $item[9][0], |
232 | is_temporary => $item[2][0] ? 1 : 0, |
233 | }; |
234 | |
235 | my $is_unique = $item[3][0]; |
236 | |
237 | if ( $is_unique ) { |
238 | $index->{'type'} = 'unique'; |
239 | push @{ $tables{ $table_name }{'constraints'} }, $index; |
240 | } |
241 | else { |
242 | push @{ $tables{ $table_name }{'indices'} }, $index; |
243 | } |
244 | } |
245 | |
246 | # |
247 | # Create Table |
248 | # |
249 | create : CREATE TEMPORARY(?) TABLE table_name '(' definition(s /,/) ')' SEMICOLON |
250 | { |
251 | my $db_name = $item[4]->{'db_name'} || ''; |
252 | my $table_name = $item[4]->{'name'}; |
253 | |
254 | $tables{ $table_name }{'name'} = $table_name; |
255 | $tables{ $table_name }{'is_temporary'} = $item[2][0] ? 1 : 0; |
256 | $tables{ $table_name }{'order'} = ++$table_order; |
257 | |
258 | for my $def ( @{ $item[6] } ) { |
259 | if ( $def->{'supertype'} eq 'column' ) { |
260 | push @{ $tables{ $table_name }{'fields'} }, $def; |
261 | } |
262 | elsif ( $def->{'supertype'} eq 'constraint' ) { |
263 | push @{ $tables{ $table_name }{'constraints'} }, $def; |
264 | } |
265 | } |
266 | } |
267 | |
268 | definition : constraint_def | column_def |
269 | |
270 | column_def: NAME type(?) column_constraint(s?) |
271 | { |
272 | my $column = { |
273 | supertype => 'column', |
274 | name => $item[1], |
275 | data_type => $item[2][0]->{'type'}, |
276 | size => $item[2][0]->{'size'}, |
277 | is_nullable => 1, |
278 | is_primary_key => 0, |
279 | is_unique => 0, |
280 | check => '', |
281 | default => undef, |
282 | constraints => $item[3], |
283 | }; |
284 | |
285 | for my $c ( @{ $item[3] } ) { |
286 | if ( $c->{'type'} eq 'not_null' ) { |
287 | $column->{'is_nullable'} = 0; |
288 | } |
289 | elsif ( $c->{'type'} eq 'primary_key' ) { |
290 | $column->{'is_primary_key'} = 1; |
291 | } |
292 | elsif ( $c->{'type'} eq 'unique' ) { |
293 | $column->{'is_unique'} = 1; |
294 | } |
295 | elsif ( $c->{'type'} eq 'check' ) { |
296 | $column->{'check'} = $c->{'expression'}; |
297 | } |
298 | elsif ( $c->{'type'} eq 'default' ) { |
299 | $column->{'default'} = $c->{'value'}; |
300 | } |
301 | } |
302 | |
303 | $column; |
304 | } |
305 | |
306 | type : WORD parens_value_list(?) |
307 | { |
308 | $return = { |
309 | type => $item[1], |
310 | size => $item[2][0], |
311 | } |
312 | } |
313 | |
314 | column_constraint : NOT_NULL conflict_clause(?) |
315 | { |
316 | $return = { |
317 | type => 'not_null', |
318 | } |
319 | } |
320 | | |
321 | PRIMARY_KEY sort_order(?) conflict_clause(?) |
322 | { |
323 | $return = { |
324 | type => 'primary_key', |
325 | sort_order => $item[2][0], |
326 | on_conflict => $item[2][0], |
327 | } |
328 | } |
329 | | |
330 | UNIQUE conflict_clause(?) |
331 | { |
332 | $return = { |
333 | type => 'unique', |
334 | on_conflict => $item[2][0], |
335 | } |
336 | } |
337 | | |
338 | CHECK_C '(' expr ')' conflict_clause(?) |
339 | { |
340 | $return = { |
341 | type => 'check', |
342 | expression => $item[3], |
343 | on_conflict => $item[5][0], |
344 | } |
345 | } |
346 | | |
347 | DEFAULT VALUE |
348 | { |
349 | $return = { |
350 | type => 'default', |
351 | value => $item[2], |
352 | } |
353 | } |
354 | |
355 | constraint_def : PRIMARY_KEY parens_field_list conflict_clause(?) |
356 | { |
357 | $return = { |
358 | supertype => 'constraint', |
359 | type => 'primary_key', |
360 | fields => $item[2], |
361 | on_conflict => $item[3][0], |
362 | } |
363 | } |
364 | | |
365 | UNIQUE parens_field_list conflict_clause(?) |
366 | { |
367 | $return = { |
368 | supertype => 'constraint', |
369 | type => 'unique', |
370 | fields => $item[2], |
371 | on_conflict => $item[3][0], |
372 | } |
373 | } |
374 | | |
375 | CHECK_C '(' expr ')' conflict_clause(?) |
376 | { |
377 | $return = { |
378 | supertype => 'constraint', |
379 | type => 'check', |
380 | expression => $item[3], |
381 | on_conflict => $item[5][0], |
382 | } |
383 | } |
384 | |
385 | table_name : qualified_name |
386 | |
387 | qualified_name : NAME |
388 | { $return = { name => $item[1] } } |
389 | |
390 | qualified_name : /(\w+)\.(\w+)/ |
391 | { $return = { db_name => $1, name => $2 } } |
392 | |
393 | field_name : NAME |
394 | |
395 | conflict_clause : /on conflict/i conflict_algorigthm |
396 | |
397 | conflict_algorigthm : /(rollback|abort|fail|ignore|replace)/i |
398 | |
399 | parens_field_list : '(' column_list ')' |
400 | { $item[2] } |
401 | |
402 | column_list : field_name(s /,/) |
403 | |
404 | parens_value_list : '(' VALUE(s /,/) ')' |
405 | { $item[2] } |
406 | |
407 | expr : /[^)]+/ |
408 | |
409 | sort_order : /(ASC|DESC)/i |
410 | |
411 | # |
412 | # Create Trigger |
413 | |
414 | create : CREATE TEMPORARY(?) TRIGGER NAME before_or_after(?) database_event ON table_name trigger_action |
415 | { |
416 | my $table_name = $item[8]->{'name'}; |
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417 | push @triggers, { |
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418 | name => $item[4], |
419 | is_temporary => $item[2][0] ? 1 : 0, |
420 | when => $item[5][0], |
421 | instead_of => 0, |
422 | db_event => $item[6], |
423 | action => $item[9], |
424 | } |
425 | } |
426 | |
427 | create : CREATE TEMPORARY(?) TRIGGER NAME instead_of database_event ON view_name trigger_action |
428 | { |
429 | my $table_name = $item[8]->{'name'}; |
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430 | push @triggers, { |
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431 | name => $item[4], |
432 | is_temporary => $item[2][0] ? 1 : 0, |
433 | when => undef, |
434 | instead_of => 1, |
435 | db_event => $item[6], |
436 | action => $item[9], |
437 | } |
438 | } |
439 | |
440 | database_event : /(delete|insert|update)/i |
441 | |
442 | database_event : /update of/i column_list |
443 | |
444 | trigger_action : for_each(?) when(?) BEGIN_C trigger_step(s) END_C |
445 | { |
446 | $return = { |
447 | for_each => $item[1][0], |
448 | when => $item[2][0], |
449 | steps => $item[4], |
450 | } |
451 | } |
452 | |
453 | for_each : /FOR EACH ROW/i | /FOR EACH STATEMENT/i |
454 | |
455 | when : WHEN expr { $item[2] } |
456 | |
457 | trigger_step : /(select|delete|insert|update)/i /[^;]+/ SEMICOLON |
458 | { |
459 | $return = join( ' ', $item[1], $item[2] ) |
460 | } |
461 | |
462 | before_or_after : /(before|after)/i { $return = lc $1 } |
463 | |
464 | instead_of : /instead of/i |
465 | |
466 | view_name : qualified_name |
467 | |
468 | # |
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469 | # Create View |
470 | # |
471 | create : CREATE TEMPORARY(?) VIEW view_name AS select_statement |
472 | { |
473 | push @views, { |
474 | name => $item[4]->{'name'}, |
475 | sql => $item[6], |
476 | is_temporary => $item[2][0] ? 1 : 0, |
477 | } |
478 | } |
479 | |
480 | select_statement : SELECT /[^;]+/ SEMICOLON |
481 | { |
482 | $return = join( ' ', $item[1], $item[2] ); |
483 | } |
484 | |
485 | # |
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486 | # Tokens |
487 | # |
488 | BEGIN_C : /begin/i |
489 | |
490 | END_C : /end/i |
491 | |
492 | CREATE : /create/i |
493 | |
494 | TEMPORARY : /temp(orary)?/i { 1 } |
495 | |
496 | TABLE : /table/i |
497 | |
498 | INDEX : /index/i |
499 | |
500 | NOT_NULL : /not null/i |
501 | |
502 | PRIMARY_KEY : /primary key/i |
503 | |
504 | CHECK_C : /check/i |
505 | |
506 | DEFAULT : /default/i |
507 | |
508 | TRIGGER : /trigger/i |
509 | |
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510 | VIEW : /view/i |
511 | |
512 | SELECT : /select/i |
513 | |
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514 | ON : /on/i |
515 | |
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516 | AS : /as/i |
517 | |
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518 | WORD : /\w+/ |
519 | |
520 | WHEN : /when/i |
521 | |
522 | UNIQUE : /unique/i { 1 } |
523 | |
524 | SEMICOLON : ';' |
525 | |
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526 | NAME : /'?(\w+)'?/ { $return = $1 } |
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527 | |
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528 | VALUE : /[-+]?\.?\d+(?:[eE]\d+)?/ |
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529 | { $item[1] } |
530 | | /'.*?'/ |
531 | { |
532 | # remove leading/trailing quotes |
533 | my $val = $item[1]; |
534 | $val =~ s/^['"]|['"]$//g; |
535 | $return = $val; |
536 | } |
537 | | /NULL/ |
538 | { 'NULL' } |
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539 | | /CURRENT_TIMESTAMP/i |
540 | { 'CURRENT_TIMESTAMP' } |
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541 | |
542 | !; |
543 | |
544 | # ------------------------------------------------------------------- |
545 | sub parse { |
546 | my ( $translator, $data ) = @_; |
547 | my $parser = Parse::RecDescent->new($GRAMMAR); |
548 | |
549 | local $::RD_TRACE = $translator->trace ? 1 : undef; |
550 | local $DEBUG = $translator->debug; |
551 | |
552 | unless (defined $parser) { |
553 | return $translator->error("Error instantiating Parse::RecDescent ". |
554 | "instance: Bad grammer"); |
555 | } |
556 | |
557 | my $result = $parser->startrule($data); |
558 | return $translator->error( "Parse failed." ) unless defined $result; |
559 | warn Dumper( $result ) if $DEBUG; |
560 | |
561 | my $schema = $translator->schema; |
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562 | my @tables = |
563 | map { $_->[1] } |
564 | sort { $a->[0] <=> $b->[0] } |
565 | map { [ $result->{'tables'}{ $_ }->{'order'}, $_ ] } |
566 | keys %{ $result->{'tables'} }; |
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567 | |
568 | for my $table_name ( @tables ) { |
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569 | my $tdata = $result->{'tables'}{ $table_name }; |
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570 | my $table = $schema->add_table( |
571 | name => $tdata->{'name'}, |
572 | ) or die $schema->error; |
573 | |
574 | $table->comments( $tdata->{'comments'} ); |
575 | |
576 | for my $fdata ( @{ $tdata->{'fields'} } ) { |
577 | my $field = $table->add_field( |
578 | name => $fdata->{'name'}, |
579 | data_type => $fdata->{'data_type'}, |
580 | size => $fdata->{'size'}, |
581 | default_value => $fdata->{'default'}, |
582 | is_auto_increment => $fdata->{'is_auto_inc'}, |
583 | is_nullable => $fdata->{'is_nullable'}, |
584 | comments => $fdata->{'comments'}, |
585 | ) or die $table->error; |
586 | |
587 | $table->primary_key( $field->name ) if $fdata->{'is_primary_key'}; |
588 | |
589 | for my $cdata ( @{ $fdata->{'constraints'} } ) { |
590 | next unless $cdata->{'type'} eq 'foreign_key'; |
591 | $cdata->{'fields'} ||= [ $field->name ]; |
592 | push @{ $tdata->{'constraints'} }, $cdata; |
593 | } |
594 | } |
595 | |
596 | for my $idata ( @{ $tdata->{'indices'} || [] } ) { |
597 | my $index = $table->add_index( |
598 | name => $idata->{'name'}, |
599 | type => uc $idata->{'type'}, |
600 | fields => $idata->{'fields'}, |
601 | ) or die $table->error; |
602 | } |
603 | |
604 | for my $cdata ( @{ $tdata->{'constraints'} || [] } ) { |
605 | my $constraint = $table->add_constraint( |
606 | name => $cdata->{'name'}, |
607 | type => $cdata->{'type'}, |
608 | fields => $cdata->{'fields'}, |
609 | reference_table => $cdata->{'reference_table'}, |
610 | reference_fields => $cdata->{'reference_fields'}, |
611 | match_type => $cdata->{'match_type'} || '', |
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612 | on_delete => $cdata->{'on_delete'} || $cdata->{'on_delete_do'}, |
613 | on_update => $cdata->{'on_update'} || $cdata->{'on_update_do'}, |
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614 | ) or die $table->error; |
615 | } |
616 | } |
617 | |
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618 | for my $def ( @{ $result->{'views'} || [] } ) { |
619 | my $view = $schema->add_view( |
620 | name => $def->{'name'}, |
621 | sql => $def->{'sql'}, |
622 | ); |
623 | } |
624 | |
625 | for my $def ( @{ $result->{'triggers'} || [] } ) { |
626 | my $view = $schema->add_trigger( |
627 | name => $def->{'name'}, |
628 | perform_action_when => $def->{'when'}, |
629 | database_event => $def->{'db_event'}, |
630 | action => $def->{'action'}, |
631 | ); |
632 | } |
633 | |
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634 | return 1; |
635 | } |
636 | |
637 | 1; |
638 | |
639 | # ------------------------------------------------------------------- |
640 | # All wholsome food is caught without a net or a trap. |
641 | # William Blake |
642 | # ------------------------------------------------------------------- |
643 | |
644 | =pod |
645 | |
646 | =head1 AUTHOR |
647 | |
648 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt>. |
649 | |
650 | =head1 SEE ALSO |
651 | |
652 | perl(1), Parse::RecDescent, SQL::Translator::Schema. |
653 | |
654 | =cut |