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f8f0253c |
1 | package SQL::Translator::Producer::PostgreSQL; |
2 | |
3 | # ------------------------------------------------------------------- |
61aa0c9d |
4 | # $Id: PostgreSQL.pm,v 1.11 2003-06-23 21:47:30 kycl4rk Exp $ |
f8f0253c |
5 | # ------------------------------------------------------------------- |
abfa405a |
6 | # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>, |
7 | # darren chamberlain <darren@cpan.org>, |
8 | # Chris Mungall <cjm@fruitfly.org> |
f8f0253c |
9 | # |
10 | # This program is free software; you can redistribute it and/or |
11 | # modify it under the terms of the GNU General Public License as |
12 | # published by the Free Software Foundation; version 2. |
13 | # |
14 | # This program is distributed in the hope that it will be useful, but |
15 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | # General Public License for more details. |
18 | # |
19 | # You should have received a copy of the GNU General Public License |
20 | # along with this program; if not, write to the Free Software |
21 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
22 | # 02111-1307 USA |
23 | # ------------------------------------------------------------------- |
24 | |
96844cae |
25 | =head1 NAME |
26 | |
27 | SQL::Translator::Producer::PostgreSQL - PostgreSQL producer for SQL::Translator |
28 | |
29 | =cut |
30 | |
f8f0253c |
31 | use strict; |
96844cae |
32 | use vars qw[ $DEBUG $WARN $VERSION ]; |
61aa0c9d |
33 | $VERSION = sprintf "%d.%02d", q$Revision: 1.11 $ =~ /(\d+)\.(\d+)/; |
f8f0253c |
34 | $DEBUG = 1 unless defined $DEBUG; |
35 | |
0c43e0a1 |
36 | use SQL::Translator::Schema::Constants; |
5ee19df8 |
37 | use SQL::Translator::Utils qw(header_comment); |
f8f0253c |
38 | use Data::Dumper; |
39 | |
d529894e |
40 | my %translate = ( |
41 | # |
42 | # MySQL types |
43 | # |
44 | bigint => 'bigint', |
45 | double => 'double precision', |
46 | decimal => 'decimal', |
47 | float => 'double precision', |
48 | int => 'integer', |
49 | mediumint => 'integer', |
50 | smallint => 'smallint', |
51 | tinyint => 'smallint', |
52 | char => 'char', |
da8e499e |
53 | varchar => 'character varying', |
d529894e |
54 | longtext => 'text', |
55 | mediumtext => 'text', |
56 | text => 'text', |
57 | tinytext => 'text', |
58 | tinyblob => 'bytea', |
59 | blob => 'bytea', |
60 | mediumblob => 'bytea', |
61 | longblob => 'bytea', |
da8e499e |
62 | enum => 'character varying', |
63 | set => 'character varying', |
d529894e |
64 | date => 'date', |
65 | datetime => 'timestamp', |
66 | time => 'date', |
67 | timestamp => 'timestamp', |
68 | year => 'date', |
69 | |
70 | # |
71 | # Oracle types |
72 | # |
96844cae |
73 | number => 'integer', |
74 | char => 'char', |
da8e499e |
75 | varchar2 => 'character varying', |
96844cae |
76 | long => 'text', |
77 | CLOB => 'bytea', |
78 | date => 'date', |
79 | |
80 | # |
81 | # Sybase types |
82 | # |
83 | int => 'integer', |
84 | money => 'money', |
da8e499e |
85 | varchar => 'character varying', |
96844cae |
86 | datetime => 'timestamp', |
87 | text => 'text', |
88 | real => 'double precision', |
89 | comment => 'text', |
90 | bit => 'bit', |
91 | tinyint => 'smallint', |
92 | float => 'double precision', |
d529894e |
93 | ); |
94 | |
96844cae |
95 | my %reserved = map { $_, 1 } qw[ |
96 | ALL ANALYSE ANALYZE AND ANY AS ASC |
97 | BETWEEN BINARY BOTH |
98 | CASE CAST CHECK COLLATE COLUMN CONSTRAINT CROSS |
99 | CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER |
100 | DEFAULT DEFERRABLE DESC DISTINCT DO |
101 | ELSE END EXCEPT |
102 | FALSE FOR FOREIGN FREEZE FROM FULL |
103 | GROUP HAVING |
104 | ILIKE IN INITIALLY INNER INTERSECT INTO IS ISNULL |
105 | JOIN LEADING LEFT LIKE LIMIT |
106 | NATURAL NEW NOT NOTNULL NULL |
107 | OFF OFFSET OLD ON ONLY OR ORDER OUTER OVERLAPS |
108 | PRIMARY PUBLIC REFERENCES RIGHT |
109 | SELECT SESSION_USER SOME TABLE THEN TO TRAILING TRUE |
110 | UNION UNIQUE USER USING VERBOSE WHEN WHERE |
111 | ]; |
d529894e |
112 | |
96844cae |
113 | my $max_id_length = 30; |
114 | my %used_identifiers = (); |
115 | my %global_names; |
116 | my %unreserve; |
117 | my %truncated; |
118 | |
119 | =pod |
120 | |
121 | =head1 PostgreSQL Create Table Syntax |
122 | |
123 | CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( |
124 | { column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ] |
125 | | table_constraint } [, ... ] |
126 | ) |
127 | [ INHERITS ( parent_table [, ... ] ) ] |
128 | [ WITH OIDS | WITHOUT OIDS ] |
129 | |
130 | where column_constraint is: |
131 | |
132 | [ CONSTRAINT constraint_name ] |
133 | { NOT NULL | NULL | UNIQUE | PRIMARY KEY | |
134 | CHECK (expression) | |
135 | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ] |
136 | [ ON DELETE action ] [ ON UPDATE action ] } |
137 | [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
138 | |
139 | and table_constraint is: |
140 | |
141 | [ CONSTRAINT constraint_name ] |
142 | { UNIQUE ( column_name [, ... ] ) | |
143 | PRIMARY KEY ( column_name [, ... ] ) | |
144 | CHECK ( expression ) | |
145 | FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ] |
146 | [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] } |
147 | [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
148 | |
da8e499e |
149 | =head1 Create Index Syntax |
150 | |
151 | CREATE [ UNIQUE ] INDEX index_name ON table |
152 | [ USING acc_method ] ( column [ ops_name ] [, ...] ) |
153 | [ WHERE predicate ] |
154 | CREATE [ UNIQUE ] INDEX index_name ON table |
155 | [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] ) |
156 | [ WHERE predicate ] |
157 | |
96844cae |
158 | =cut |
f8f0253c |
159 | |
96844cae |
160 | # ------------------------------------------------------------------- |
f8f0253c |
161 | sub produce { |
a1d94525 |
162 | my $translator = shift; |
163 | $DEBUG = $translator->debug; |
164 | $WARN = $translator->show_warnings; |
165 | my $no_comments = $translator->no_comments; |
166 | my $add_drop_table = $translator->add_drop_table; |
167 | my $schema = $translator->schema; |
96844cae |
168 | |
da8e499e |
169 | my $output; |
5ee19df8 |
170 | $output .= header_comment unless ($no_comments); |
96844cae |
171 | |
0c43e0a1 |
172 | for my $table ( $schema->get_tables ) { |
173 | my $table_name = $table->name or next; |
da8e499e |
174 | $table_name = mk_name( $table_name, '', undef, 1 ); |
175 | my $table_name_ur = unreserve($table_name); |
176 | |
0c43e0a1 |
177 | my ( @comments, @field_defs, @sequence_defs, @constraint_defs ); |
96844cae |
178 | |
da8e499e |
179 | push @comments, "--\n-- Table: $table_name_ur\n--" unless $no_comments; |
f8f0253c |
180 | |
181 | # |
182 | # Fields |
183 | # |
96844cae |
184 | my %field_name_scope; |
0c43e0a1 |
185 | for my $field ( $table->get_fields ) { |
96844cae |
186 | my $field_name = mk_name( |
0c43e0a1 |
187 | $field->name, '', \%field_name_scope, 1 |
96844cae |
188 | ); |
189 | my $field_name_ur = unreserve( $field_name, $table_name ); |
0c43e0a1 |
190 | my $field_def = qq["$field_name_ur"]; |
da8e499e |
191 | |
192 | # |
193 | # Datatype |
194 | # |
0c43e0a1 |
195 | my @size = $field->size; |
196 | my $data_type = lc $field->data_type; |
197 | my %extra = $field->extra; |
198 | my $list = $extra{'list'} || []; |
da8e499e |
199 | my $commalist = join ",", @$list; |
200 | my $seq_name; |
201 | |
202 | if ( $data_type eq 'enum' ) { |
203 | my $len = 0; |
204 | $len = ($len < length($_)) ? length($_) : $len for (@$list); |
205 | my $check_name = mk_name( $table_name.'_'.$field_name, 'chk' ); |
0c43e0a1 |
206 | push @constraint_defs, |
da8e499e |
207 | "CONSTRAINT $check_name CHECK ($field_name IN ($commalist))"; |
0c43e0a1 |
208 | $data_type = 'character varying'; |
da8e499e |
209 | } |
210 | elsif ( $data_type eq 'set' ) { |
211 | # XXX add a CHECK constraint maybe |
212 | # (trickier and slower, than enum :) |
0c43e0a1 |
213 | # my $len = length $commalist; |
214 | # $field_def .= " character varying($len) /* set $commalist */"; |
215 | $data_type = 'character varying'; |
da8e499e |
216 | } |
0c43e0a1 |
217 | elsif ( $field->is_auto_increment ) { |
218 | $field_def .= ' serial'; |
219 | # $seq_name = mk_name( $table_name.'_'.$field_name, 'sq' ); |
220 | # push @sequence_defs, qq[DROP SEQUENCE "$seq_name";]; |
221 | # push @sequence_defs, qq[CREATE SEQUENCE "$seq_name";]; |
da8e499e |
222 | } |
223 | else { |
224 | $data_type = defined $translate{ $data_type } ? |
225 | $translate{ $data_type } : |
61aa0c9d |
226 | $data_type; |
0c43e0a1 |
227 | } |
228 | |
229 | $field_def .= " $data_type"; |
230 | |
231 | if ( defined $size[0] && $size[0] > 0 ) { |
232 | $field_def .= '(' . join( ', ', @size ) . ')'; |
f8f0253c |
233 | } |
234 | |
da8e499e |
235 | # |
236 | # Default value |
237 | # |
0c43e0a1 |
238 | my $default = $field->default_value; |
239 | if ( defined $default ) { |
240 | $field_def .= sprintf( ' DEFAULT %s', |
241 | ( $field->is_auto_increment && $seq_name ) |
da8e499e |
242 | ? qq[nextval('"$seq_name"'::text)] : |
0c43e0a1 |
243 | ( $default =~ m/null/i ) ? 'NULL' : "'$default'" |
da8e499e |
244 | ); |
245 | } |
f8f0253c |
246 | |
da8e499e |
247 | # |
248 | # Not null constraint |
249 | # |
0c43e0a1 |
250 | $field_def .= ' NOT NULL' unless $field->is_nullable; |
f8f0253c |
251 | |
0c43e0a1 |
252 | push @field_defs, $field_def; |
f8f0253c |
253 | } |
f8f0253c |
254 | |
255 | # |
da8e499e |
256 | # Index Declarations |
f8f0253c |
257 | # |
0c43e0a1 |
258 | my @index_defs = (); |
da8e499e |
259 | my $idx_name_default; |
0c43e0a1 |
260 | for my $index ( $table->get_indices ) { |
261 | my $name = $index->name || ''; |
262 | my $type = $index->type || NORMAL; |
d8dcdb7a |
263 | my @fields = |
264 | map { $_ =~ s/\(.+\)//; $_ } |
265 | map { unreserve( $_, $table_name ) } |
0c43e0a1 |
266 | $index->fields; |
da8e499e |
267 | next unless @fields; |
268 | |
0c43e0a1 |
269 | if ( $type eq PRIMARY_KEY ) { |
270 | $name ||= mk_name( $table_name, 'pk' ); |
271 | push @constraint_defs, 'CONSTRAINT '.$name.' PRIMARY KEY '. |
da8e499e |
272 | '(' . join( ', ', @fields ) . ')'; |
273 | } |
0c43e0a1 |
274 | elsif ( $type eq UNIQUE ) { |
275 | $name ||= mk_name( |
276 | $table_name, $name || ++$idx_name_default |
da8e499e |
277 | ); |
0c43e0a1 |
278 | push @constraint_defs, 'CONSTRAINT ' . $name . ' UNIQUE ' . |
da8e499e |
279 | '(' . join( ', ', @fields ) . ')'; |
280 | } |
0c43e0a1 |
281 | elsif ( $type eq NORMAL ) { |
282 | $name ||= mk_name( |
283 | $table_name, $name || ++$idx_name_default |
da8e499e |
284 | ); |
0c43e0a1 |
285 | push @index_defs, |
286 | qq[CREATE INDEX "$name" on $table_name_ur (]. |
da8e499e |
287 | join( ', ', @fields ). |
288 | ');'; |
289 | } |
f8f0253c |
290 | else { |
0c43e0a1 |
291 | warn "Unknown index type ($type) on table $table_name.\n" |
da8e499e |
292 | if $WARN; |
f8f0253c |
293 | } |
294 | } |
295 | |
0c43e0a1 |
296 | # |
297 | # Table constraints |
298 | # |
299 | my $c_name_default; |
300 | for my $c ( $table->get_constraints ) { |
301 | my $name = $c->name || ''; |
302 | my @fields = |
303 | map { $_ =~ s/\(.+\)//; $_ } |
304 | map { unreserve( $_, $table_name ) } |
305 | $c->fields; |
306 | my @rfields = |
307 | map { $_ =~ s/\(.+\)//; $_ } |
308 | map { unreserve( $_, $table_name ) } |
309 | $c->reference_fields; |
310 | next unless @fields; |
311 | |
312 | if ( $c->type eq PRIMARY_KEY ) { |
313 | $name ||= mk_name( $table_name, 'pk' ); |
314 | push @constraint_defs, "CONSTRAINT $name PRIMARY KEY ". |
315 | '(' . join( ', ', @fields ) . ')'; |
316 | } |
317 | elsif ( $c->type eq UNIQUE ) { |
318 | $name ||= mk_name( |
319 | $table_name, $name || ++$c_name_default |
320 | ); |
321 | push @constraint_defs, "CONSTRAINT $name UNIQUE " . |
322 | '(' . join( ', ', @fields ) . ')'; |
323 | } |
324 | elsif ( $c->type eq FOREIGN_KEY ) { |
325 | my $def = join(' ', |
326 | map { $_ || () } 'FOREIGN KEY', $c->name |
327 | ); |
328 | |
329 | $def .= ' (' . join( ', ', @fields ) . ')'; |
330 | |
331 | $def .= ' REFERENCES ' . $c->reference_table; |
332 | |
333 | if ( @rfields ) { |
334 | $def .= ' (' . join( ', ', @rfields ) . ')'; |
335 | } |
336 | |
337 | if ( $c->match_type ) { |
338 | $def .= ' MATCH ' . |
339 | ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL'; |
340 | } |
341 | |
342 | if ( $c->on_delete ) { |
343 | $def .= ' ON DELETE '.join( ' ', $c->on_delete ); |
344 | } |
345 | |
346 | if ( $c->on_update ) { |
347 | $def .= ' ON UPDATE '.join( ' ', $c->on_update ); |
348 | } |
349 | |
350 | push @constraint_defs, $def; |
351 | } |
352 | } |
353 | |
da8e499e |
354 | my $create_statement; |
355 | $create_statement = qq[DROP TABLE "$table_name_ur";\n] |
356 | if $add_drop_table; |
357 | $create_statement .= qq[CREATE TABLE "$table_name_ur" (\n]. |
0c43e0a1 |
358 | join( ",\n", map { " $_" } @field_defs, @constraint_defs ). |
da8e499e |
359 | "\n);" |
360 | ; |
361 | |
362 | $output .= join( "\n\n", |
363 | @comments, |
0c43e0a1 |
364 | @sequence_defs, |
da8e499e |
365 | $create_statement, |
0c43e0a1 |
366 | @index_defs, |
da8e499e |
367 | '' |
368 | ); |
369 | } |
370 | |
371 | if ( $WARN ) { |
372 | if ( %truncated ) { |
373 | warn "Truncated " . keys( %truncated ) . " names:\n"; |
374 | warn "\t" . join( "\n\t", sort keys %truncated ) . "\n"; |
375 | } |
376 | |
377 | if ( %unreserve ) { |
378 | warn "Encounted " . keys( %unreserve ) . |
379 | " unsafe names in schema (reserved or invalid):\n"; |
380 | warn "\t" . join( "\n\t", sort keys %unreserve ) . "\n"; |
381 | } |
f8f0253c |
382 | } |
383 | |
da8e499e |
384 | return $output; |
f8f0253c |
385 | } |
386 | |
96844cae |
387 | # ------------------------------------------------------------------- |
388 | sub mk_name { |
0c43e0a1 |
389 | my $basename = shift || ''; |
390 | my $type = shift || ''; |
391 | my $scope = shift || ''; |
392 | my $critical = shift || ''; |
96844cae |
393 | my $basename_orig = $basename; |
2ad4c2c8 |
394 | my $max_name = $type |
395 | ? $max_id_length - (length($type) + 1) |
396 | : $max_id_length; |
96844cae |
397 | $basename = substr( $basename, 0, $max_name ) |
398 | if length( $basename ) > $max_name; |
399 | my $name = $type ? "${type}_$basename" : $basename; |
400 | |
401 | if ( $basename ne $basename_orig and $critical ) { |
402 | my $show_type = $type ? "+'$type'" : ""; |
403 | warn "Truncating '$basename_orig'$show_type to $max_id_length ", |
404 | "character limit to make '$name'\n" if $WARN; |
405 | $truncated{ $basename_orig } = $name; |
406 | } |
407 | |
408 | $scope ||= \%global_names; |
409 | if ( my $prev = $scope->{ $name } ) { |
410 | my $name_orig = $name; |
411 | $name .= sprintf( "%02d", ++$prev ); |
412 | substr($name, $max_id_length - 3) = "00" |
413 | if length( $name ) > $max_id_length; |
414 | |
415 | warn "The name '$name_orig' has been changed to ", |
416 | "'$name' to make it unique.\n" if $WARN; |
417 | |
418 | $scope->{ $name_orig }++; |
f8f0253c |
419 | } |
96844cae |
420 | |
421 | $scope->{ $name }++; |
422 | return $name; |
423 | } |
424 | |
425 | # ------------------------------------------------------------------- |
426 | sub unreserve { |
0c43e0a1 |
427 | my $name = shift || ''; |
428 | my $schema_obj_name = shift || ''; |
429 | |
96844cae |
430 | my ( $suffix ) = ( $name =~ s/(\W.*)$// ) ? $1 : ''; |
431 | |
432 | # also trap fields that don't begin with a letter |
0c43e0a1 |
433 | return $name if !$reserved{ uc $name } && $name =~ /^[a-z]/i; |
96844cae |
434 | |
435 | if ( $schema_obj_name ) { |
436 | ++$unreserve{"$schema_obj_name.$name"}; |
437 | } |
438 | else { |
439 | ++$unreserve{"$name (table name)"}; |
440 | } |
441 | |
442 | my $unreserve = sprintf '%s_', $name; |
443 | return $unreserve.$suffix; |
f8f0253c |
444 | } |
445 | |
446 | 1; |
f8f0253c |
447 | |
96844cae |
448 | # ------------------------------------------------------------------- |
449 | # Life is full of misery, loneliness, and suffering -- |
450 | # and it's all over much too soon. |
451 | # Woody Allen |
452 | # ------------------------------------------------------------------- |
f8f0253c |
453 | |
96844cae |
454 | =pod |
f8f0253c |
455 | |
456 | =head1 AUTHOR |
457 | |
458 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |
459 | |
460 | =cut |