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1 | package SQL::Translator::Producer::PostgreSQL; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: PostgreSQL.pm,v 1.4 2002-12-04 01:53:51 kycl4rk Exp $ |
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5 | # ------------------------------------------------------------------- |
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6 | # Copyright (C) 2002 Ken Y. Clark <kclark@cpan.org>, |
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7 | # darren chamberlain <darren@cpan.org> |
8 | # |
9 | # This program is free software; you can redistribute it and/or |
10 | # modify it under the terms of the GNU General Public License as |
11 | # published by the Free Software Foundation; version 2. |
12 | # |
13 | # This program is distributed in the hope that it will be useful, but |
14 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | # General Public License for more details. |
17 | # |
18 | # You should have received a copy of the GNU General Public License |
19 | # along with this program; if not, write to the Free Software |
20 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
21 | # 02111-1307 USA |
22 | # ------------------------------------------------------------------- |
23 | |
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24 | =head1 NAME |
25 | |
26 | SQL::Translator::Producer::PostgreSQL - PostgreSQL producer for SQL::Translator |
27 | |
28 | =cut |
29 | |
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30 | use strict; |
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31 | use vars qw[ $DEBUG $WARN $VERSION ]; |
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32 | $VERSION = sprintf "%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/; |
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33 | $DEBUG = 1 unless defined $DEBUG; |
34 | |
35 | use Data::Dumper; |
36 | |
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37 | my %translate = ( |
38 | # |
39 | # MySQL types |
40 | # |
41 | bigint => 'bigint', |
42 | double => 'double precision', |
43 | decimal => 'decimal', |
44 | float => 'double precision', |
45 | int => 'integer', |
46 | mediumint => 'integer', |
47 | smallint => 'smallint', |
48 | tinyint => 'smallint', |
49 | char => 'char', |
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50 | varchar => 'character varying', |
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51 | longtext => 'text', |
52 | mediumtext => 'text', |
53 | text => 'text', |
54 | tinytext => 'text', |
55 | tinyblob => 'bytea', |
56 | blob => 'bytea', |
57 | mediumblob => 'bytea', |
58 | longblob => 'bytea', |
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59 | enum => 'character varying', |
60 | set => 'character varying', |
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61 | date => 'date', |
62 | datetime => 'timestamp', |
63 | time => 'date', |
64 | timestamp => 'timestamp', |
65 | year => 'date', |
66 | |
67 | # |
68 | # Oracle types |
69 | # |
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70 | number => 'integer', |
71 | char => 'char', |
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72 | varchar2 => 'character varying', |
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73 | long => 'text', |
74 | CLOB => 'bytea', |
75 | date => 'date', |
76 | |
77 | # |
78 | # Sybase types |
79 | # |
80 | int => 'integer', |
81 | money => 'money', |
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82 | varchar => 'character varying', |
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83 | datetime => 'timestamp', |
84 | text => 'text', |
85 | real => 'double precision', |
86 | comment => 'text', |
87 | bit => 'bit', |
88 | tinyint => 'smallint', |
89 | float => 'double precision', |
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90 | ); |
91 | |
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92 | my %reserved = map { $_, 1 } qw[ |
93 | ALL ANALYSE ANALYZE AND ANY AS ASC |
94 | BETWEEN BINARY BOTH |
95 | CASE CAST CHECK COLLATE COLUMN CONSTRAINT CROSS |
96 | CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER |
97 | DEFAULT DEFERRABLE DESC DISTINCT DO |
98 | ELSE END EXCEPT |
99 | FALSE FOR FOREIGN FREEZE FROM FULL |
100 | GROUP HAVING |
101 | ILIKE IN INITIALLY INNER INTERSECT INTO IS ISNULL |
102 | JOIN LEADING LEFT LIKE LIMIT |
103 | NATURAL NEW NOT NOTNULL NULL |
104 | OFF OFFSET OLD ON ONLY OR ORDER OUTER OVERLAPS |
105 | PRIMARY PUBLIC REFERENCES RIGHT |
106 | SELECT SESSION_USER SOME TABLE THEN TO TRAILING TRUE |
107 | UNION UNIQUE USER USING VERBOSE WHEN WHERE |
108 | ]; |
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109 | |
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110 | my $max_id_length = 30; |
111 | my %used_identifiers = (); |
112 | my %global_names; |
113 | my %unreserve; |
114 | my %truncated; |
115 | |
116 | =pod |
117 | |
118 | =head1 PostgreSQL Create Table Syntax |
119 | |
120 | CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( |
121 | { column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ] |
122 | | table_constraint } [, ... ] |
123 | ) |
124 | [ INHERITS ( parent_table [, ... ] ) ] |
125 | [ WITH OIDS | WITHOUT OIDS ] |
126 | |
127 | where column_constraint is: |
128 | |
129 | [ CONSTRAINT constraint_name ] |
130 | { NOT NULL | NULL | UNIQUE | PRIMARY KEY | |
131 | CHECK (expression) | |
132 | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ] |
133 | [ ON DELETE action ] [ ON UPDATE action ] } |
134 | [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
135 | |
136 | and table_constraint is: |
137 | |
138 | [ CONSTRAINT constraint_name ] |
139 | { UNIQUE ( column_name [, ... ] ) | |
140 | PRIMARY KEY ( column_name [, ... ] ) | |
141 | CHECK ( expression ) | |
142 | FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ] |
143 | [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] } |
144 | [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
145 | |
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146 | =head1 Create Index Syntax |
147 | |
148 | CREATE [ UNIQUE ] INDEX index_name ON table |
149 | [ USING acc_method ] ( column [ ops_name ] [, ...] ) |
150 | [ WHERE predicate ] |
151 | CREATE [ UNIQUE ] INDEX index_name ON table |
152 | [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] ) |
153 | [ WHERE predicate ] |
154 | |
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155 | =cut |
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156 | |
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157 | # ------------------------------------------------------------------- |
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158 | sub produce { |
159 | my ( $translator, $data ) = @_; |
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160 | $DEBUG = $translator->debug; |
161 | $WARN = $translator->show_warnings; |
162 | my $no_comments = $translator->no_comments; |
163 | my $add_drop_table = $translator->add_drop_table; |
164 | |
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165 | my $output; |
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166 | unless ( $no_comments ) { |
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167 | $output .= sprintf |
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168 | "--\n-- Created by %s\n-- Created on %s\n--\n\n", |
169 | __PACKAGE__, scalar localtime; |
170 | } |
171 | |
172 | for my $table ( |
173 | map { $_->[1] } |
174 | sort { $a->[0] <=> $b->[0] } |
175 | map { [ $_->{'order'}, $_ ] } |
176 | values %$data |
177 | ) { |
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178 | my $table_name = $table->{'table_name'}; |
179 | $table_name = mk_name( $table_name, '', undef, 1 ); |
180 | my $table_name_ur = unreserve($table_name); |
181 | |
182 | my ( @comments, @field_decs, @sequence_decs, @constraints ); |
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183 | |
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184 | push @comments, "--\n-- Table: $table_name_ur\n--" unless $no_comments; |
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185 | |
186 | # |
187 | # Fields |
188 | # |
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189 | my %field_name_scope; |
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190 | for my $field ( |
191 | map { $_->[1] } |
192 | sort { $a->[0] <=> $b->[0] } |
193 | map { [ $_->{'order'}, $_ ] } |
194 | values %{ $table->{'fields'} } |
195 | ) { |
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196 | my $field_name = mk_name( |
197 | $field->{'name'}, '', \%field_name_scope, 1 |
198 | ); |
199 | my $field_name_ur = unreserve( $field_name, $table_name ); |
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200 | my $field_str = qq["$field_name_ur"]; |
201 | |
202 | # |
203 | # Datatype |
204 | # |
205 | my $data_type = lc $field->{'data_type'}; |
206 | my $list = $field->{'list'} || []; |
207 | my $commalist = join ",", @$list; |
208 | my $seq_name; |
209 | |
210 | if ( $data_type eq 'enum' ) { |
211 | my $len = 0; |
212 | $len = ($len < length($_)) ? length($_) : $len for (@$list); |
213 | my $check_name = mk_name( $table_name.'_'.$field_name, 'chk' ); |
214 | push @constraints, |
215 | "CONSTRAINT $check_name CHECK ($field_name IN ($commalist))"; |
216 | $field_str .= " character varying($len)"; |
217 | } |
218 | elsif ( $data_type eq 'set' ) { |
219 | # XXX add a CHECK constraint maybe |
220 | # (trickier and slower, than enum :) |
221 | my $len = length $commalist; |
222 | $field_str .= " character varying($len) /* set $commalist */"; |
223 | } |
224 | elsif ( $field->{'is_auto_inc'} ) { |
225 | $field_str .= ' serial'; |
226 | $seq_name = mk_name( $table_name.'_'.$field_name, 'sq' ); |
227 | push @sequence_decs, qq[DROP SEQUENCE "$seq_name";]; |
228 | push @sequence_decs, qq[CREATE SEQUENCE "$seq_name";]; |
229 | } |
230 | else { |
231 | $data_type = defined $translate{ $data_type } ? |
232 | $translate{ $data_type } : |
233 | die "Unknown datatype: $data_type\n"; |
234 | $field_str .= ' '.$data_type; |
235 | if ( $data_type =~ /(char|varbit|numeric|decimal)/i ) { |
236 | $field_str .= '('.join(',', @{ $field->{'size'} }).')' |
237 | if @{ $field->{'size'} || [] }; |
238 | } |
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239 | } |
240 | |
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241 | # |
242 | # Default value |
243 | # |
244 | if ( defined $field->{'default'} ) { |
245 | $field_str .= sprintf( ' DEFAULT %s', |
246 | ( $field->{'is_auto_inc'} && $seq_name ) |
247 | ? qq[nextval('"$seq_name"'::text)] : |
248 | ( $field->{'default'} =~ m/null/i ) |
249 | ? 'NULL' : |
250 | "'".$field->{'default'}."'" |
251 | ); |
252 | } |
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253 | |
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254 | # |
255 | # Not null constraint |
256 | # |
257 | unless ( $field->{'null'} ) { |
258 | my $constraint_name = mk_name($field_name_ur, 'nn'); |
259 | # $field_str .= ' CONSTRAINT '.$constraint_name.' NOT NULL'; |
260 | $field_str .= ' NOT NULL'; |
261 | } |
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262 | |
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263 | # |
264 | # Primary key |
265 | # |
266 | # if ( $field->{'is_primary_key'} ) { |
267 | # my $constraint_name = mk_name($field_name_ur, 'pk'); |
268 | # $field_str .= ' CONSTRAINT '.$constraint_name.' PRIMARY KEY'; |
269 | # } |
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270 | |
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271 | push @field_decs, $field_str; |
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272 | } |
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273 | |
274 | # |
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275 | # Index Declarations |
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276 | # |
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277 | my @index_decs = (); |
278 | my $idx_name_default; |
279 | for my $index ( @{ $table->{'indices'} } ) { |
280 | my $index_name = $index->{'name'} || ''; |
281 | my $index_type = $index->{'type'} || 'normal'; |
282 | my @fields = map { unreserve( $_, $table_name ) } |
283 | @{ $index->{'fields'} }; |
284 | next unless @fields; |
285 | |
286 | if ( $index_type eq 'primary_key' ) { |
287 | $index_name = mk_name( $table_name, 'pk' ); |
288 | push @constraints, 'CONSTRAINT '.$index_name.' PRIMARY KEY '. |
289 | '(' . join( ', ', @fields ) . ')'; |
290 | } |
291 | elsif ( $index_type eq 'unique' ) { |
292 | $index_name = mk_name( |
293 | $table_name, $index_name || ++$idx_name_default |
294 | ); |
295 | push @constraints, 'CONSTRAINT ' . $index_name . ' UNIQUE ' . |
296 | '(' . join( ', ', @fields ) . ')'; |
297 | } |
298 | elsif ( $index_type eq 'normal' ) { |
299 | $index_name = mk_name( |
300 | $table_name, $index_name || ++$idx_name_default |
301 | ); |
302 | push @index_decs, |
303 | qq[CREATE INDEX "$index_name" on $table_name_ur (]. |
304 | join( ', ', @fields ). |
305 | ');'; |
306 | } |
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307 | else { |
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308 | warn "Unknown index type ($index_type) on table $table_name.\n" |
309 | if $WARN; |
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310 | } |
311 | } |
312 | |
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313 | my $create_statement; |
314 | $create_statement = qq[DROP TABLE "$table_name_ur";\n] |
315 | if $add_drop_table; |
316 | $create_statement .= qq[CREATE TABLE "$table_name_ur" (\n]. |
317 | join( ",\n", map { " $_" } @field_decs, @constraints ). |
318 | "\n);" |
319 | ; |
320 | |
321 | $output .= join( "\n\n", |
322 | @comments, |
323 | @sequence_decs, |
324 | $create_statement, |
325 | @index_decs, |
326 | '' |
327 | ); |
328 | } |
329 | |
330 | if ( $WARN ) { |
331 | if ( %truncated ) { |
332 | warn "Truncated " . keys( %truncated ) . " names:\n"; |
333 | warn "\t" . join( "\n\t", sort keys %truncated ) . "\n"; |
334 | } |
335 | |
336 | if ( %unreserve ) { |
337 | warn "Encounted " . keys( %unreserve ) . |
338 | " unsafe names in schema (reserved or invalid):\n"; |
339 | warn "\t" . join( "\n\t", sort keys %unreserve ) . "\n"; |
340 | } |
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341 | } |
342 | |
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343 | return $output; |
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344 | } |
345 | |
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346 | # ------------------------------------------------------------------- |
347 | sub mk_name { |
348 | my ($basename, $type, $scope, $critical) = @_; |
349 | my $basename_orig = $basename; |
350 | my $max_name = $max_id_length - (length($type) + 1); |
351 | $basename = substr( $basename, 0, $max_name ) |
352 | if length( $basename ) > $max_name; |
353 | my $name = $type ? "${type}_$basename" : $basename; |
354 | |
355 | if ( $basename ne $basename_orig and $critical ) { |
356 | my $show_type = $type ? "+'$type'" : ""; |
357 | warn "Truncating '$basename_orig'$show_type to $max_id_length ", |
358 | "character limit to make '$name'\n" if $WARN; |
359 | $truncated{ $basename_orig } = $name; |
360 | } |
361 | |
362 | $scope ||= \%global_names; |
363 | if ( my $prev = $scope->{ $name } ) { |
364 | my $name_orig = $name; |
365 | $name .= sprintf( "%02d", ++$prev ); |
366 | substr($name, $max_id_length - 3) = "00" |
367 | if length( $name ) > $max_id_length; |
368 | |
369 | warn "The name '$name_orig' has been changed to ", |
370 | "'$name' to make it unique.\n" if $WARN; |
371 | |
372 | $scope->{ $name_orig }++; |
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373 | } |
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374 | |
375 | $scope->{ $name }++; |
376 | return $name; |
377 | } |
378 | |
379 | # ------------------------------------------------------------------- |
380 | sub unreserve { |
381 | my ( $name, $schema_obj_name ) = @_; |
382 | my ( $suffix ) = ( $name =~ s/(\W.*)$// ) ? $1 : ''; |
383 | |
384 | # also trap fields that don't begin with a letter |
385 | return $_[0] if !$reserved{ uc $name } && $name =~ /^[a-z]/i; |
386 | |
387 | if ( $schema_obj_name ) { |
388 | ++$unreserve{"$schema_obj_name.$name"}; |
389 | } |
390 | else { |
391 | ++$unreserve{"$name (table name)"}; |
392 | } |
393 | |
394 | my $unreserve = sprintf '%s_', $name; |
395 | return $unreserve.$suffix; |
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396 | } |
397 | |
398 | 1; |
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399 | |
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400 | # ------------------------------------------------------------------- |
401 | # Life is full of misery, loneliness, and suffering -- |
402 | # and it's all over much too soon. |
403 | # Woody Allen |
404 | # ------------------------------------------------------------------- |
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405 | |
96844cae |
406 | =pod |
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407 | |
408 | =head1 AUTHOR |
409 | |
410 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |
411 | |
412 | =cut |