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1 | package SQL::Translator::Parser::PostgreSQL; |
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2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: PostgreSQL.pm,v 1.12 2003-04-17 23:16:29 allenday Exp $ |
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5 | # ------------------------------------------------------------------- |
6 | # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>, |
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7 | # Allen Day <allenday@users.sourceforge.net>, |
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8 | # darren chamberlain <darren@cpan.org>, |
9 | # Chris Mungall <cjm@fruitfly.org> |
10 | # |
11 | # This program is free software; you can redistribute it and/or |
12 | # modify it under the terms of the GNU General Public License as |
13 | # published by the Free Software Foundation; version 2. |
14 | # |
15 | # This program is distributed in the hope that it will be useful, but |
16 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | # General Public License for more details. |
19 | # |
20 | # You should have received a copy of the GNU General Public License |
21 | # along with this program; if not, write to the Free Software |
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22 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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23 | # 02111-1307 USA |
24 | # ------------------------------------------------------------------- |
25 | |
26 | =head1 NAME |
27 | |
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28 | SQL::Translator::Parser::PostgreSQL - parser for PostgreSQL |
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29 | |
30 | =head1 SYNOPSIS |
31 | |
32 | use SQL::Translator; |
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33 | use SQL::Translator::Parser::PostgreSQL; |
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34 | |
35 | my $translator = SQL::Translator->new; |
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36 | $translator->parser("SQL::Translator::Parser::PostgreSQL"); |
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37 | |
38 | =head1 DESCRIPTION |
39 | |
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40 | The grammar was started from the MySQL parsers. Here is the description |
41 | from PostgreSQL: |
42 | |
43 | Table: |
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44 | (http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createtable.html) |
45 | |
46 | CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( |
47 | { column_name data_type [ DEFAULT default_expr ] |
48 | [ column_constraint [, ... ] ] |
49 | | table_constraint } [, ... ] |
50 | ) |
51 | [ INHERITS ( parent_table [, ... ] ) ] |
52 | [ WITH OIDS | WITHOUT OIDS ] |
53 | |
54 | where column_constraint is: |
55 | |
56 | [ CONSTRAINT constraint_name ] |
57 | { NOT NULL | NULL | UNIQUE | PRIMARY KEY | |
58 | CHECK (expression) | |
59 | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ] |
60 | [ ON DELETE action ] [ ON UPDATE action ] } |
61 | [ DEFERRABLE | NOT DEFERRABLE ] |
62 | [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
63 | |
64 | and table_constraint is: |
65 | |
66 | [ CONSTRAINT constraint_name ] |
67 | { UNIQUE ( column_name [, ... ] ) | |
68 | PRIMARY KEY ( column_name [, ... ] ) | |
69 | CHECK ( expression ) | |
70 | FOREIGN KEY ( column_name [, ... ] ) |
71 | REFERENCES reftable [ ( refcolumn [, ... ] ) ] |
72 | [ MATCH FULL | MATCH PARTIAL ] |
73 | [ ON DELETE action ] [ ON UPDATE action ] } |
74 | [ DEFERRABLE | NOT DEFERRABLE ] |
75 | [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
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76 | |
77 | Index: |
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78 | (http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createindex.html) |
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79 | |
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80 | CREATE [ UNIQUE ] INDEX index_name ON table |
81 | [ USING acc_method ] ( column [ ops_name ] [, ...] ) |
82 | [ WHERE predicate ] |
83 | CREATE [ UNIQUE ] INDEX index_name ON table |
84 | [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] ) |
85 | [ WHERE predicate ] |
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86 | |
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87 | Alter table: |
88 | |
89 | ALTER TABLE [ ONLY ] table [ * ] |
90 | ADD [ COLUMN ] column type [ column_constraint [ ... ] ] |
91 | ALTER TABLE [ ONLY ] table [ * ] |
92 | ALTER [ COLUMN ] column { SET DEFAULT value | DROP DEFAULT } |
93 | ALTER TABLE [ ONLY ] table [ * ] |
94 | ALTER [ COLUMN ] column SET STATISTICS integer |
95 | ALTER TABLE [ ONLY ] table [ * ] |
96 | RENAME [ COLUMN ] column TO newcolumn |
97 | ALTER TABLE table |
98 | RENAME TO new_table |
99 | ALTER TABLE table |
100 | ADD table_constraint_definition |
101 | ALTER TABLE [ ONLY ] table |
102 | DROP CONSTRAINT constraint { RESTRICT | CASCADE } |
103 | ALTER TABLE table |
104 | OWNER TO new_owner |
105 | |
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106 | =cut |
107 | |
108 | use strict; |
109 | use vars qw[ $DEBUG $VERSION $GRAMMAR @EXPORT_OK ]; |
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110 | $VERSION = sprintf "%d.%02d", q$Revision: 1.12 $ =~ /(\d+)\.(\d+)/; |
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111 | $DEBUG = 0 unless defined $DEBUG; |
112 | |
113 | use Data::Dumper; |
114 | use Parse::RecDescent; |
115 | use Exporter; |
116 | use base qw(Exporter); |
117 | |
118 | @EXPORT_OK = qw(parse); |
119 | |
120 | # Enable warnings within the Parse::RecDescent module. |
121 | $::RD_ERRORS = 1; # Make sure the parser dies when it encounters an error |
122 | $::RD_WARN = 1; # Enable warnings. This will warn on unused rules &c. |
123 | $::RD_HINT = 1; # Give out hints to help fix problems. |
124 | |
125 | my $parser; # should we do this? There's no programmic way to |
126 | # change the grammar, so I think this is safe. |
127 | |
128 | $GRAMMAR = q! |
129 | |
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130 | { our ( %tables, $table_order ) } |
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131 | |
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132 | # |
133 | # The "eofile" rule makes the parser fail if any "statement" rule |
134 | # fails. Otherwise, the first successful match by a "statement" |
135 | # won't cause the failure needed to know that the parse, as a whole, |
136 | # failed. -ky |
137 | # |
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138 | startrule : statement(s) eofile { \%tables } |
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139 | |
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140 | eofile : /^\Z/ |
141 | |
142 | statement : create |
143 | | comment |
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144 | | alter |
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145 | | grant |
146 | | revoke |
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147 | | drop |
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148 | | connect |
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149 | | set |
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150 | | <error> |
151 | |
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152 | connect : /^\s*\\\connect.*\n/ |
153 | |
0012a163 |
154 | set : /SET/ /[^;]*/ ';' |
155 | |
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156 | revoke : /revoke/i WORD(s /,/) /on/i table_name /from/i name_with_opt_quotes(s /,/) ';' |
157 | { |
158 | my $table_name = $item{'table_name'}; |
159 | push @{ $tables{ $table_name }{'permissions'} }, { |
160 | type => 'revoke', |
161 | actions => $item[2], |
162 | users => $item[6], |
163 | } |
164 | } |
165 | |
166 | grant : /grant/i WORD(s /,/) /on/i table_name /to/i name_with_opt_quotes(s /,/) ';' |
167 | { |
168 | my $table_name = $item{'table_name'}; |
169 | push @{ $tables{ $table_name }{'permissions'} }, { |
170 | type => 'grant', |
171 | actions => $item[2], |
172 | users => $item[6], |
173 | } |
174 | } |
175 | |
176 | drop : /drop/i /[^;]*/ ';' |
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177 | |
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178 | # |
179 | # Create table. |
180 | # |
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181 | create : create_table table_name '(' create_definition(s /,/) ')' table_option(s?) ';' |
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182 | { |
183 | my $table_name = $item{'table_name'}; |
184 | $tables{ $table_name }{'order'} = ++$table_order; |
185 | $tables{ $table_name }{'table_name'} = $table_name; |
186 | |
187 | my $i = 1; |
188 | my @constraints; |
189 | for my $definition ( @{ $item[4] } ) { |
190 | if ( $definition->{'type'} eq 'field' ) { |
191 | my $field_name = $definition->{'name'}; |
192 | $tables{ $table_name }{'fields'}{ $field_name } = |
193 | { %$definition, order => $i }; |
194 | $i++; |
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195 | |
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196 | if ( $definition->{'is_primary_key'} ) { |
197 | push @{ $tables{ $table_name }{'indices'} }, { |
198 | type => 'primary_key', |
199 | fields => [ $field_name ], |
200 | }; |
201 | } |
202 | |
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203 | for my $constraint ( @{ $definition->{'constraints'} || [] } ) { |
204 | $constraint->{'fields'} = [ $field_name ]; |
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205 | push @{ $tables{ $table_name }{'constraints'} }, |
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206 | $constraint; |
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207 | } |
208 | } |
209 | elsif ( $definition->{'type'} eq 'constraint' ) { |
210 | $definition->{'type'} = $definition->{'constraint_type'}; |
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211 | # group FKs at the field level |
212 | if ( $definition->{'type'} eq 'foreign_key' ) { |
213 | for my $fld ( @{ $definition->{'fields'} || [] } ) { |
214 | push @{ |
215 | $tables{$table_name}{'fields'}{$fld}{'constraints'} |
216 | }, $definition; |
217 | } |
218 | } |
219 | else { |
220 | push @{ $tables{ $table_name }{'constraints'} }, |
221 | $definition; |
222 | } |
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223 | } |
224 | else { |
225 | push @{ $tables{ $table_name }{'indices'} }, $definition; |
226 | } |
227 | } |
228 | |
229 | for my $option ( @{ $item[6] } ) { |
230 | $tables{ $table_name }{'table_options'}{ $option->{'type'} } = |
231 | $option; |
232 | } |
233 | |
234 | 1; |
235 | } |
236 | |
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237 | # |
238 | # Create index. |
239 | # |
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240 | create : /create/i unique(?) /(index|key)/i index_name /on/i table_name using_method(?) '(' field_name(s /,/) ')' where_predicate(?) ';' |
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241 | { |
242 | push @{ $tables{ $item{'table_name'} }{'indices'} }, |
243 | { |
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244 | name => $item{'index_name'}, |
245 | type => $item{'unique'}[0] ? 'unique' : 'normal', |
246 | fields => $item[9], |
247 | method => $item{'using_method'}[0], |
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248 | } |
249 | ; |
250 | } |
251 | |
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252 | # |
253 | # Create anything else (e.g., domain, function, etc.) |
254 | # |
255 | create : /create/i WORD /[^;]+/ ';' |
256 | |
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257 | using_method : /using/i WORD { $item[2] } |
258 | |
259 | where_predicate : /where/i /[^;]+/ |
260 | |
261 | create_definition : field |
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262 | | table_constraint |
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263 | | <error> |
264 | |
265 | comment : /^\s*(?:#|-{2}).*\n/ |
266 | |
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267 | field : comment(s?) field_name data_type field_meta(s?) comment(s?) |
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268 | { |
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269 | my ( $default, @constraints ); |
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270 | for my $meta ( @{ $item[4] } ) { |
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271 | $default = $meta if $meta->{'meta_type'} eq 'default'; |
272 | push @constraints, $meta if $meta->{'meta_type'} eq 'constraint'; |
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273 | } |
274 | |
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275 | my $null = ( grep { $_->{'type'} eq 'not_null' } @constraints ) ? 0 : 1; |
276 | |
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277 | my @comments = ( @{ $item[1] }, @{ $item[5] } ); |
278 | |
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279 | $return = { |
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280 | type => 'field', |
281 | name => $item{'field_name'}, |
282 | data_type => $item{'data_type'}{'type'}, |
283 | size => $item{'data_type'}{'size'}, |
284 | list => $item{'data_type'}{'list'}, |
285 | null => $null, |
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286 | default => $default->{'value'}, |
287 | constraints => [ @constraints ], |
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288 | comments => [ @comments ], |
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289 | } |
290 | } |
291 | | <error> |
292 | |
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293 | field_meta : default_val |
294 | | |
295 | column_constraint |
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296 | |
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297 | column_constraint : constraint_name(?) column_constraint_type deferrable(?) deferred(?) |
298 | { |
299 | my $desc = $item{'column_constraint_type'}; |
300 | my $type = $desc->{'type'}; |
301 | my $fields = $desc->{'fields'} || []; |
302 | my $expression = $desc->{'expression'} || ''; |
303 | |
304 | $return = { |
305 | meta_type => 'constraint', |
306 | name => $item{'constraint_name'}[0] || '', |
307 | type => $type, |
308 | expression => $type eq 'check' ? $expression : '', |
309 | deferreable => $item{'deferrable'}, |
310 | deferred => $item{'deferred'}, |
311 | reference_table => $desc->{'reference_table'}, |
312 | reference_fields => $desc->{'reference_fields'}, |
313 | match_type => $desc->{'match_type'}, |
314 | on_delete_do => $desc->{'on_delete_do'}, |
315 | on_update_do => $desc->{'on_update_do'}, |
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316 | } |
317 | } |
318 | |
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319 | constraint_name : /constraint/i name_with_opt_quotes { $item[2] } |
320 | |
321 | column_constraint_type : /not null/i { $return = { type => 'not_null' } } |
322 | | |
323 | /null/ |
324 | { $return = { type => 'null' } } |
325 | | |
326 | /unique/ |
327 | { $return = { type => 'unique' } } |
328 | | |
329 | /primary key/i |
330 | { $return = { type => 'primary_key' } } |
331 | | |
332 | /check/i '(' /[^)]+/ ')' |
333 | { $return = { type => 'check', expression => $item[2] } } |
334 | | |
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335 | /references/i table_name parens_word_list(?) match_type(?) on_delete_do(?) on_update_do(?) |
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336 | { |
337 | $return = { |
338 | type => 'foreign_key', |
339 | reference_table => $item[2], |
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340 | reference_fields => $item[3][0], |
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341 | match_type => $item[4][0], |
342 | on_delete_do => $item[5][0], |
343 | on_update_do => $item[6][0], |
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344 | } |
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345 | } |
346 | |
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347 | table_name : name_with_opt_quotes |
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348 | |
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349 | field_name : name_with_opt_quotes |
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350 | |
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351 | name_with_opt_quotes : double_quote(?) NAME double_quote(?) { $item[2] } |
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352 | |
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353 | double_quote: /"/ |
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354 | |
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355 | index_name : WORD |
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356 | |
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357 | data_type : pg_data_type parens_value_list(?) |
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358 | { |
359 | my $type = $item[1]; |
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360 | |
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361 | # |
362 | # We can deduce some sizes from the data type's name. |
363 | # |
364 | my $size; |
365 | if ( ref $type eq 'ARRAY' ) { |
366 | $size = [ $type->[1] ]; |
367 | $type = $type->[0]; |
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368 | } |
369 | else { |
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370 | $size = $item[2][0] || ''; |
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371 | } |
372 | |
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373 | $return = { |
374 | type => $type, |
375 | size => $size, |
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376 | } |
377 | } |
378 | |
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379 | pg_data_type : |
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380 | /(bigint|int8|bigserial|serial8)/ { $return = [ 'integer(8) auto_increment'] } |
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381 | | |
382 | /(smallint|int2)/ { $return = [ 'integer', 2 ] } |
383 | | |
384 | /int(eger)?|int4/ { $return = [ 'integer', 4 ] } |
385 | | |
386 | /(double precision|float8?)/ { $return = [ 'float', 8 ] } |
387 | | |
388 | /(real|float4)/ { $return = [ 'real', 4 ] } |
389 | | |
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390 | /serial4?/ { $return = [ 'integer(4) auto_increment'] } |
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391 | | |
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392 | /bigserial/ { $return = [ 'integer(8) auto_increment'] } |
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393 | | |
394 | /(bit varying|varbit)/ { $return = 'varbit' } |
395 | | |
396 | /character varying/ { $return = 'varchar' } |
397 | | |
398 | /char(acter)?/ { $return = 'char' } |
399 | | |
400 | /bool(ean)?/ { $return = 'boolean' } |
401 | | |
402 | /(bytea|binary data)/ { $return = 'binary' } |
403 | | |
404 | /timestampz?/ { $return = 'timestamp' } |
405 | | |
406 | /(bit|box|cidr|circle|date|inet|interval|line|lseg|macaddr|money|numeric|decimal|path|point|polygon|text|time|varchar)/ |
407 | { $item[1] } |
408 | |
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409 | parens_value_list : '(' VALUE(s /,/) ')' |
410 | { $item[2] } |
411 | |
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412 | parens_word_list : '(' WORD(s /,/) ')' |
413 | { $item[2] } |
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414 | |
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415 | field_size : '(' num_range ')' { $item{'num_range'} } |
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416 | |
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417 | num_range : DIGITS ',' DIGITS |
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418 | { $return = $item[1].','.$item[3] } |
419 | | DIGITS |
420 | { $return = $item[1] } |
421 | |
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422 | table_constraint : comment(s?) constraint_name(?) table_constraint_type deferrable(?) deferred(?) comment(s?) |
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423 | { |
424 | my $desc = $item{'table_constraint_type'}; |
425 | my $type = $desc->{'type'}; |
426 | my $fields = $desc->{'fields'}; |
427 | my $expression = $desc->{'expression'}; |
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428 | my @comments = ( @{ $item[1] }, @{ $item[-1] } ); |
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429 | |
430 | $return = { |
431 | name => $item{'constraint_name'}[0] || '', |
432 | type => 'constraint', |
433 | constraint_type => $type, |
434 | fields => $type ne 'check' ? $fields : [], |
435 | expression => $type eq 'check' ? $expression : '', |
436 | deferreable => $item{'deferrable'}, |
437 | deferred => $item{'deferred'}, |
438 | reference_table => $desc->{'reference_table'}, |
439 | reference_fields => $desc->{'reference_fields'}, |
440 | match_type => $desc->{'match_type'}[0], |
0012a163 |
441 | on_delete_do => $desc->{'on_delete_do'}, |
442 | on_update_do => $desc->{'on_update_do'}, |
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443 | comments => [ @comments ], |
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444 | } |
445 | } |
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446 | |
0efb6e1b |
447 | table_constraint_type : /primary key/i '(' name_with_opt_quotes(s /,/) ')' |
448 | { |
449 | $return = { |
450 | type => 'primary_key', |
451 | fields => $item[3], |
452 | } |
453 | } |
454 | | |
455 | /unique/i '(' name_with_opt_quotes(s /,/) ')' |
456 | { |
457 | $return = { |
458 | type => 'unique', |
459 | fields => $item[3], |
460 | } |
461 | } |
462 | | |
463 | /check/ '(' /(.+)/ ')' |
464 | { |
465 | $return = { |
466 | type => 'check', |
467 | expression => $item[3], |
468 | } |
469 | } |
470 | | |
471 | /foreign key/i '(' name_with_opt_quotes(s /,/) ')' /references/i table_name parens_word_list(?) match_type(?) on_delete_do(?) on_update_do(?) |
472 | { |
473 | $return = { |
474 | type => 'foreign_key', |
475 | fields => $item[3], |
476 | reference_table => $item[6], |
477 | reference_fields => $item[7][0], |
478 | match_type => $item[8][0], |
479 | on_delete_do => $item[9][0], |
480 | on_update_do => $item[10][0], |
481 | } |
482 | } |
483 | |
484 | deferrable : /not/i /deferrable/i |
485 | { |
486 | $return = ( $item[1] =~ /not/i ) ? 0 : 1; |
487 | } |
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488 | |
0efb6e1b |
489 | deferred : /initially/i /(deferred|immediate)/i { $item[2] } |
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490 | |
0efb6e1b |
491 | match_type : /match full/i { 'match_full' } |
492 | | |
493 | /match partial/i { 'match_partial' } |
494 | |
0012a163 |
495 | on_delete_do : /on delete/i WORD(s) |
0efb6e1b |
496 | { $item[2] } |
497 | |
0012a163 |
498 | on_update_do : /on update/i WORD(s) |
0efb6e1b |
499 | { $item[2] } |
500 | |
0012a163 |
501 | alter : alter_table table_name /add/i table_constraint ';' |
502 | { |
503 | my $table_name = $item[2]; |
504 | my $constraint = $item[4]; |
505 | $constraint->{'type'} = $constraint->{'constraint_type'}; |
506 | push @{ $tables{ $table_name }{'constraints'} }, $constraint; |
507 | } |
508 | |
509 | alter_table : /alter/i /table/i only(?) |
510 | |
511 | only : /only/i |
512 | |
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513 | create_table : /create/i /table/i |
514 | |
515 | create_index : /create/i /index/i |
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516 | |
517 | default_val : /default/i /(?:')?[\w\d.-]*(?:')?/ |
518 | { |
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519 | my $val = $item[2] || ''; |
520 | $val =~ s/'//g; |
521 | $return = { |
522 | meta_type => 'default', |
523 | value => $val, |
524 | } |
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525 | } |
526 | |
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527 | name_with_opt_paren : NAME parens_value_list(s?) |
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528 | { $item[2][0] ? "$item[1]($item[2][0][0])" : $item[1] } |
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529 | |
530 | unique : /unique/i { 1 } |
531 | |
532 | key : /key/i | /index/i |
533 | |
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534 | table_option : /inherits/i '(' name_with_opt_quotes(s /,/) ')' |
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535 | { |
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536 | $return = { type => 'inherits', table_name => $item[3] } |
537 | } |
538 | | |
539 | /with(out)? oids/i |
540 | { |
541 | $return = { type => $item[1] =~ /out/i ? 'without_oids' : 'with_oids' } |
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542 | } |
543 | |
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544 | SEMICOLON : /\s*;\n?/ |
545 | |
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546 | WORD : /\w+/ |
547 | |
548 | DIGITS : /\d+/ |
549 | |
550 | COMMA : ',' |
551 | |
552 | NAME : "`" /\w+/ "`" |
553 | { $item[2] } |
554 | | /\w+/ |
555 | { $item[1] } |
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556 | | /[\$\w]+/ |
557 | { $item[1] } |
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558 | |
559 | VALUE : /[-+]?\.?\d+(?:[eE]\d+)?/ |
560 | { $item[1] } |
561 | | /'.*?'/ # XXX doesn't handle embedded quotes |
562 | { $item[1] } |
563 | | /NULL/ |
564 | { 'NULL' } |
565 | |
566 | !; |
567 | |
568 | # ------------------------------------------------------------------- |
569 | sub parse { |
570 | my ( $translator, $data ) = @_; |
571 | $parser ||= Parse::RecDescent->new($GRAMMAR); |
572 | |
573 | $::RD_TRACE = $translator->trace ? 1 : undef; |
574 | $DEBUG = $translator->debug; |
575 | |
576 | unless (defined $parser) { |
577 | return $translator->error("Error instantiating Parse::RecDescent ". |
578 | "instance: Bad grammer"); |
579 | } |
580 | |
581 | my $result = $parser->startrule($data); |
582 | die "Parse failed.\n" unless defined $result; |
583 | warn Dumper($result) if $DEBUG; |
584 | return $result; |
585 | } |
586 | |
587 | 1; |
588 | |
589 | #----------------------------------------------------- |
590 | # Where man is not nature is barren. |
591 | # William Blake |
592 | #----------------------------------------------------- |
593 | |
594 | =pod |
595 | |
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596 | =head1 AUTHORS |
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597 | |
598 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt>, |
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599 | Allen Day <allenday@ucla.edu>. |
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600 | |
601 | =head1 SEE ALSO |
602 | |
603 | perl(1), Parse::RecDescent. |
604 | |
605 | =cut |