1 package SQL::Translator::Producer::PostgreSQL;
3 # -------------------------------------------------------------------
4 # $Id: PostgreSQL.pm,v 1.17 2003-09-26 22:35:23 kycl4rk Exp $
5 # -------------------------------------------------------------------
6 # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>,
7 # darren chamberlain <darren@cpan.org>,
8 # Chris Mungall <cjm@fruitfly.org>
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.
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.
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
23 # -------------------------------------------------------------------
27 SQL::Translator::Producer::PostgreSQL - PostgreSQL producer for SQL::Translator
32 use vars qw[ $DEBUG $WARN $VERSION ];
33 $VERSION = sprintf "%d.%02d", q$Revision: 1.17 $ =~ /(\d+)\.(\d+)/;
34 $DEBUG = 1 unless defined $DEBUG;
36 use SQL::Translator::Schema::Constants;
37 use SQL::Translator::Utils qw(header_comment);
49 mediumint => 'integer',
50 smallint => 'smallint',
51 tinyint => 'smallint',
53 varchar => 'character varying',
60 mediumblob => 'bytea',
62 enum => 'character varying',
63 set => 'character varying',
65 datetime => 'timestamp',
67 timestamp => 'timestamp',
75 varchar2 => 'character varying',
85 varchar => 'character varying',
86 datetime => 'timestamp',
91 tinyint => 'smallint',
95 my %reserved = map { $_, 1 } qw[
96 ALL ANALYSE ANALYZE AND ANY AS ASC
98 CASE CAST CHECK COLLATE COLUMN CONSTRAINT CROSS
99 CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER
100 DEFAULT DEFERRABLE DESC DISTINCT DO
102 FALSE FOR FOREIGN FREEZE FROM FULL
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
113 my $max_id_length = 30;
114 my %used_identifiers = ();
121 =head1 PostgreSQL Create Table Syntax
123 CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name (
124 { column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ]
125 | table_constraint } [, ... ]
127 [ INHERITS ( parent_table [, ... ] ) ]
128 [ WITH OIDS | WITHOUT OIDS ]
130 where column_constraint is:
132 [ CONSTRAINT constraint_name ]
133 { NOT NULL | NULL | UNIQUE | PRIMARY KEY |
135 REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ]
136 [ ON DELETE action ] [ ON UPDATE action ] }
137 [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
139 and table_constraint is:
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 ]
149 =head1 Create Index Syntax
151 CREATE [ UNIQUE ] INDEX index_name ON table
152 [ USING acc_method ] ( column [ ops_name ] [, ...] )
154 CREATE [ UNIQUE ] INDEX index_name ON table
155 [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] )
160 # -------------------------------------------------------------------
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;
170 $output .= header_comment unless ($no_comments);
171 my %used_index_names;
173 for my $table ( $schema->get_tables ) {
174 my $table_name = $table->name or next;
175 $table_name = mk_name( $table_name, '', undef, 1 );
176 my $table_name_ur = unreserve($table_name);
178 my ( @comments, @field_defs, @sequence_defs, @constraint_defs );
180 push @comments, "--\n-- Table: $table_name_ur\n--" unless $no_comments;
185 my %field_name_scope;
186 for my $field ( $table->get_fields ) {
187 my $field_name = mk_name(
188 $field->name, '', \%field_name_scope, 1
190 my $field_name_ur = unreserve( $field_name, $table_name );
191 my $field_def = qq["$field_name_ur"];
196 my @size = $field->size;
197 my $data_type = lc $field->data_type;
198 my %extra = $field->extra;
199 my $list = $extra{'list'} || [];
200 # todo deal with embedded quotes
201 my $commalist = join( ', ', map { qq['$_'] } @$list );
204 if ( $data_type eq 'enum' ) {
206 $len = ($len < length($_)) ? length($_) : $len for (@$list);
207 my $chk_name = mk_name( $table_name.'_'.$field_name, 'chk' );
208 push @constraint_defs,
209 qq[Constraint "$chk_name" CHECK ("$field_name" ].
210 qq[IN ($commalist))];
211 $data_type = 'character varying';
213 elsif ( $data_type eq 'set' ) {
214 # XXX add a CHECK constraint maybe
215 # (trickier and slower, than enum :)
216 # my $len = length $commalist;
217 # $field_def .= " character varying($len) /* set $commalist */";
218 $data_type = 'character varying';
220 elsif ( $field->is_auto_increment ) {
221 if ( defined $size[0] && $size[0] > 11 ) {
222 $data_type = 'bigserial';
225 $data_type = 'serial';
229 # $seq_name = mk_name( $table_name.'_'.$field_name, 'sq' );
230 # push @sequence_defs, qq[DROP SEQUENCE "$seq_name";];
231 # push @sequence_defs, qq[CREATE SEQUENCE "$seq_name";];
234 $data_type = defined $translate{ $data_type } ?
235 $translate{ $data_type } :
239 if ( $data_type =~ /timestamp/i ) {
240 if ( defined $size[0] && $size[0] > 6 ) {
245 if ( $data_type eq 'integer' ) {
246 if ( defined $size[0] ) {
247 if ( $size[0] > 10 ) {
248 $data_type = 'bigint';
250 elsif ( $size[0] < 5 ) {
251 $data_type = 'smallint';
254 $data_type = 'integer';
258 $data_type = 'integer';
263 # PG doesn't need a size for integers or text
265 undef @size if $data_type =~ m/(integer|smallint|bigint|text)/;
267 $field_def .= " $data_type";
269 if ( defined $size[0] && $size[0] > 0 ) {
270 $field_def .= '(' . join( ',', @size ) . ')';
274 # Default value -- disallow for timestamps
276 my $default = $data_type =~ /(timestamp|date)/i
277 ? undef : $field->default_value;
278 if ( defined $default ) {
279 $field_def .= sprintf( ' DEFAULT %s',
280 ( $field->is_auto_increment && $seq_name )
281 ? qq[nextval('"$seq_name"'::text)] :
282 ( $default =~ m/null/i ) ? 'NULL' : "'$default'"
287 # Not null constraint
289 $field_def .= ' NOT NULL' unless $field->is_nullable;
291 push @field_defs, $field_def;
298 my $idx_name_default;
299 for my $index ( $table->get_indices ) {
300 my $name = $index->name || '';
302 $name = next_unused_name($name, \%used_index_names);
303 $used_index_names{$name} = $name;
306 my $type = $index->type || NORMAL;
308 map { $_ =~ s/\(.+\)//; $_ }
309 map { unreserve( $_, $table_name ) }
313 my $def_start = qq[Constraint "$name" ];
314 if ( $type eq PRIMARY_KEY ) {
315 push @constraint_defs, "${def_start}PRIMARY KEY ".
316 '("' . join( '", "', @fields ) . '")';
318 elsif ( $type eq UNIQUE ) {
319 push @constraint_defs, "${def_start}UNIQUE " .
320 '("' . join( '", "', @fields ) . '")';
322 elsif ( $type eq NORMAL ) {
324 'CREATE INDEX "' . $name . "\" on $table_name_ur (".
325 join( ', ', map { qq["$_"] } @fields ).
330 warn "Unknown index type ($type) on table $table_name.\n"
339 for my $c ( $table->get_constraints ) {
340 my $name = $c->name || '';
342 $name = next_unused_name($name, \%used_index_names);
343 $used_index_names{$name} = $name;
347 map { $_ =~ s/\(.+\)//; $_ }
348 map { unreserve( $_, $table_name ) }
352 map { $_ =~ s/\(.+\)//; $_ }
353 map { unreserve( $_, $table_name ) }
354 $c->reference_fields;
356 next if !@fields && $c->type ne CHECK_C;
358 my $def_start = $name ? qq[Constraint "$name" ] : '';
359 if ( $c->type eq PRIMARY_KEY ) {
360 push @constraint_defs, "${def_start}PRIMARY KEY ".
361 '("' . join( '", "', @fields ) . '")';
363 elsif ( $c->type eq UNIQUE ) {
364 $name = next_unused_name($name, \%used_index_names);
365 $used_index_names{$name} = $name;
366 push @constraint_defs, "${def_start}UNIQUE " .
367 '("' . join( '", "', @fields ) . '")';
369 elsif ( $c->type eq CHECK_C ) {
370 my $expression = $c->expression;
371 push @constraint_defs, "${def_start}CHECK ($expression)";
373 elsif ( $c->type eq FOREIGN_KEY ) {
374 # my $def = join(' ',
375 # map { $_ || () } 'FOREIGN KEY', $c->name
378 my $def .= 'FOREIGN KEY ("' . join( '", "', @fields ) . '")';
380 $def .= ' REFERENCES ' . $c->reference_table;
383 $def .= ' ("' . join( '", "', @rfields ) . '")';
386 if ( $c->match_type ) {
388 ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
391 if ( $c->on_delete ) {
392 $def .= ' ON DELETE '.join( ' ', $c->on_delete );
395 if ( $c->on_update ) {
396 $def .= ' ON UPDATE '.join( ' ', $c->on_update );
399 push @constraint_defs, $def;
403 my $create_statement;
404 $create_statement = qq[DROP TABLE "$table_name_ur";\n]
406 $create_statement .= qq[CREATE TABLE "$table_name_ur" (\n].
407 join( ",\n", map { " $_" } @field_defs, @constraint_defs ).
411 $output .= join( "\n\n",
422 warn "Truncated " . keys( %truncated ) . " names:\n";
423 warn "\t" . join( "\n\t", sort keys %truncated ) . "\n";
427 warn "Encounted " . keys( %unreserve ) .
428 " unsafe names in schema (reserved or invalid):\n";
429 warn "\t" . join( "\n\t", sort keys %unreserve ) . "\n";
436 # -------------------------------------------------------------------
438 my $basename = shift || '';
439 my $type = shift || '';
440 my $scope = shift || '';
441 my $critical = shift || '';
442 my $basename_orig = $basename;
444 ? $max_id_length - (length($type) + 1)
446 $basename = substr( $basename, 0, $max_name )
447 if length( $basename ) > $max_name;
448 my $name = $type ? "${type}_$basename" : $basename;
450 if ( $basename ne $basename_orig and $critical ) {
451 my $show_type = $type ? "+'$type'" : "";
452 warn "Truncating '$basename_orig'$show_type to $max_id_length ",
453 "character limit to make '$name'\n" if $WARN;
454 $truncated{ $basename_orig } = $name;
457 $scope ||= \%global_names;
458 if ( my $prev = $scope->{ $name } ) {
459 my $name_orig = $name;
460 $name .= sprintf( "%02d", ++$prev );
461 substr($name, $max_id_length - 3) = "00"
462 if length( $name ) > $max_id_length;
464 warn "The name '$name_orig' has been changed to ",
465 "'$name' to make it unique.\n" if $WARN;
467 $scope->{ $name_orig }++;
474 # -------------------------------------------------------------------
476 my $name = shift || '';
477 my $schema_obj_name = shift || '';
479 my ( $suffix ) = ( $name =~ s/(\W.*)$// ) ? $1 : '';
481 # also trap fields that don't begin with a letter
482 return $name if !$reserved{ uc $name } && $name =~ /^[a-z]/i;
484 if ( $schema_obj_name ) {
485 ++$unreserve{"$schema_obj_name.$name"};
488 ++$unreserve{"$name (table name)"};
491 my $unreserve = sprintf '%s_', $name;
492 return $unreserve.$suffix;
495 # -------------------------------------------------------------------
496 sub next_unused_name {
497 my $name = shift || '';
498 my $used_names = shift || '';
500 my %used_names = %$used_names;
502 if ( !defined($used_names{$name}) ) {
503 $used_names{$name} = $name;
508 while ( defined($used_names{$name . $i}) ) {
512 $used_names{$name} = $name;
518 # -------------------------------------------------------------------
519 # Life is full of misery, loneliness, and suffering --
520 # and it's all over much too soon.
522 # -------------------------------------------------------------------
528 Ken Y. Clark E<lt>kclark@cpan.orgE<gt>