1 package SQL::Translator::Producer::PostgreSQL;
5 SQL::Translator::Producer::PostgreSQL - PostgreSQL producer for SQL::Translator
9 my $t = SQL::Translator->new( parser => '...', producer => 'PostgreSQL' );
14 Creates a DDL suitable for PostgreSQL. Very heavily based on the Oracle
17 Now handles PostGIS Geometry and Geography data types on table definitions.
18 Does not yet support PostGIS Views.
24 our ( $DEBUG, $WARN );
25 our $VERSION = '1.60';
26 $DEBUG = 0 unless defined $DEBUG;
28 use base qw(SQL::Translator::Producer);
29 use SQL::Translator::Schema::Constants;
30 use SQL::Translator::Utils qw(debug header_comment parse_dbms_version batch_alter_table_statements normalize_quote_options);
31 use SQL::Translator::Generator::DDL::PostgreSQL;
34 use constant MAX_ID_LENGTH => 62;
37 my ($quoting_generator, $nonquoting_generator);
40 return $options->{generator} if exists $options->{generator};
42 return normalize_quote_options($options)
43 ? $quoting_generator ||= SQL::Translator::Generator::DDL::PostgreSQL->new
44 : $nonquoting_generator ||= SQL::Translator::Generator::DDL::PostgreSQL->new(
58 double => 'double precision',
61 mediumint => 'integer',
62 tinyint => 'smallint',
64 varchar => 'character varying',
70 mediumblob => 'bytea',
72 enum => 'character varying',
73 set => 'character varying',
74 datetime => 'timestamp',
81 varchar2 => 'character varying',
100 =head1 PostgreSQL Create Table Syntax
102 CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name (
103 { column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ]
104 | table_constraint } [, ... ]
106 [ INHERITS ( parent_table [, ... ] ) ]
107 [ WITH OIDS | WITHOUT OIDS ]
109 where column_constraint is:
111 [ CONSTRAINT constraint_name ]
112 { NOT NULL | NULL | UNIQUE | PRIMARY KEY |
114 REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ]
115 [ ON DELETE action ] [ ON UPDATE action ] }
116 [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
118 and table_constraint is:
120 [ CONSTRAINT constraint_name ]
121 { UNIQUE ( column_name [, ... ] ) |
122 PRIMARY KEY ( column_name [, ... ] ) |
123 CHECK ( expression ) |
124 FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ]
125 [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] }
126 [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
128 =head1 Create Index Syntax
130 CREATE [ UNIQUE ] INDEX index_name ON table
131 [ USING acc_method ] ( column [ ops_name ] [, ...] )
133 CREATE [ UNIQUE ] INDEX index_name ON table
134 [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] )
140 my $translator = shift;
141 local $DEBUG = $translator->debug;
142 local $WARN = $translator->show_warnings;
143 my $no_comments = $translator->no_comments;
144 my $add_drop_table = $translator->add_drop_table;
145 my $schema = $translator->schema;
146 my $pargs = $translator->producer_args;
147 my $postgres_version = parse_dbms_version(
148 $pargs->{postgres_version}, 'perl'
151 my $generator = _generator({ quote_identifiers => $translator->quote_identifiers });
154 push @output, header_comment unless ($no_comments);
156 my (@table_defs, @fks);
158 for my $table ( $schema->get_tables ) {
160 my ($table_def, $fks) = create_table($table, {
161 generator => $generator,
162 no_comments => $no_comments,
163 postgres_version => $postgres_version,
164 add_drop_table => $add_drop_table,
165 type_defs => \%type_defs,
168 push @table_defs, $table_def;
172 for my $view ( $schema->get_views ) {
173 push @table_defs, create_view($view, {
174 postgres_version => $postgres_version,
175 add_drop_view => $add_drop_table,
176 generator => $generator,
177 no_comments => $no_comments,
181 for my $trigger ( $schema->get_triggers ) {
182 push @table_defs, create_trigger( $trigger, {
183 add_drop_trigger => $add_drop_table,
184 generator => $generator,
185 no_comments => $no_comments,
189 push @output, map { "$_;\n\n" } values %type_defs;
190 push @output, map { "$_;\n\n" } @table_defs;
192 push @output, "--\n-- Foreign Key Definitions\n--\n\n" unless $no_comments;
193 push @output, map { "$_;\n\n" } @fks;
198 warn "Truncated " . keys( %truncated ) . " names:\n";
199 warn "\t" . join( "\n\t", sort keys %truncated ) . "\n";
205 : join ('', @output);
211 my $basename = shift || '';
212 my $type = shift || '';
213 my $scope = shift || '';
214 my $critical = shift || '';
215 my $basename_orig = $basename;
218 ? MAX_ID_LENGTH - (length($type) + 1)
220 $basename = substr( $basename, 0, $max_name )
221 if length( $basename ) > $max_name;
222 my $name = $type ? "${type}_$basename" : $basename;
224 if ( $basename ne $basename_orig and $critical ) {
225 my $show_type = $type ? "+'$type'" : "";
226 warn "Truncating '$basename_orig'$show_type to ", MAX_ID_LENGTH,
227 " character limit to make '$name'\n" if $WARN;
228 $truncated{ $basename_orig } = $name;
231 $scope ||= \%global_names;
232 if ( my $prev = $scope->{ $name } ) {
233 my $name_orig = $name;
234 $name .= sprintf( "%02d", ++$prev );
235 substr($name, MAX_ID_LENGTH - 3) = "00"
236 if length( $name ) > MAX_ID_LENGTH;
238 warn "The name '$name_orig' has been changed to ",
239 "'$name' to make it unique.\n" if $WARN;
241 $scope->{ $name_orig }++;
251 return 1 if $field->data_type eq 'geometry';
256 return 1 if $field->data_type eq 'geography';
261 my ($table, $options) = @_;
263 my $generator = _generator($options);
264 my $no_comments = $options->{no_comments} || 0;
265 my $add_drop_table = $options->{add_drop_table} || 0;
266 my $postgres_version = $options->{postgres_version} || 0;
267 my $type_defs = $options->{type_defs} || {};
269 my $table_name = $table->name or next;
270 my $table_name_qt = $generator->quote($table_name);
272 my ( @comments, @field_defs, @index_defs, @constraint_defs, @fks );
274 push @comments, "--\n-- Table: $table_name\n--\n" unless $no_comments;
276 if ( !$no_comments and my $comments = $table->comments ) {
277 $comments =~ s/^/-- /mg;
278 push @comments, "-- Comments:\n$comments\n--\n";
284 for my $field ( $table->get_fields ) {
285 push @field_defs, create_field($field, {
286 generator => $generator,
287 postgres_version => $postgres_version,
288 type_defs => $type_defs,
289 constraint_defs => \@constraint_defs,
296 for my $index ( $table->get_indices ) {
297 my ($idef, $constraints) = create_index($index, {
298 generator => $generator,
300 $idef and push @index_defs, $idef;
301 push @constraint_defs, @$constraints;
307 for my $c ( $table->get_constraints ) {
308 my ($cdefs, $fks) = create_constraint($c, {
309 generator => $generator,
311 push @constraint_defs, @$cdefs;
316 my $create_statement = join("\n", @comments);
317 if ($add_drop_table) {
318 if ($postgres_version >= 8.002) {
319 $create_statement .= "DROP TABLE IF EXISTS $table_name_qt CASCADE;\n";
321 $create_statement .= "DROP TABLE $table_name_qt CASCADE;\n";
324 my $temporary = $table->extra->{temporary} ? "TEMPORARY " : "";
325 $create_statement .= "CREATE ${temporary}TABLE $table_name_qt (\n" .
326 join( ",\n", map { " $_" } @field_defs, @constraint_defs ).
329 $create_statement .= @index_defs ? ';' : q{};
330 $create_statement .= ( $create_statement =~ /;$/ ? "\n" : q{} )
331 . join(";\n", @index_defs);
336 if (my @geometry_columns = grep { is_geometry($_) } $table->get_fields) {
337 $create_statement .= join(";\n", '', map{ drop_geometry_column($_, $options) } @geometry_columns) if $options->{add_drop_table};
338 $create_statement .= join(";\n", '', map{ add_geometry_column($_, $options) } @geometry_columns);
341 return $create_statement, \@fks;
345 my ($view, $options) = @_;
346 my $generator = _generator($options);
347 my $postgres_version = $options->{postgres_version} || 0;
348 my $add_drop_view = $options->{add_drop_view};
350 my $view_name = $view->name;
351 debug("PKG: Looking at view '${view_name}'\n");
354 $create .= "--\n-- View: " . $generator->quote($view_name) . "\n--\n"
355 unless $options->{no_comments};
356 if ($add_drop_view) {
357 if ($postgres_version >= 8.002) {
358 $create .= "DROP VIEW IF EXISTS " . $generator->quote($view_name) . ";\n";
360 $create .= "DROP VIEW " . $generator->quote($view_name) . ";\n";
365 my $extra = $view->extra;
366 $create .= " TEMPORARY" if exists($extra->{temporary}) && $extra->{temporary};
367 $create .= " VIEW " . $generator->quote($view_name);
369 if ( my @fields = $view->fields ) {
370 my $field_list = join ', ', map { $generator->quote($_) } @fields;
371 $create .= " ( ${field_list} )";
374 if ( my $sql = $view->sql ) {
375 $create .= " AS\n ${sql}\n";
378 if ( $extra->{check_option} ) {
379 $create .= ' WITH ' . uc $extra->{check_option} . ' CHECK OPTION';
387 my %field_name_scope;
391 my ($field, $options) = @_;
393 my $generator = _generator($options);
394 my $table_name = $field->table->name;
395 my $constraint_defs = $options->{constraint_defs} || [];
396 my $postgres_version = $options->{postgres_version} || 0;
397 my $type_defs = $options->{type_defs} || {};
399 $field_name_scope{$table_name} ||= {};
400 my $field_name = $field->name;
401 my $field_comments = '';
402 if (my $comments = $field->comments) {
403 $comments =~ s/(?<!\A)^/ -- /mg;
404 $field_comments = "-- $comments\n ";
407 my $field_def = $field_comments . $generator->quote($field_name);
412 my $data_type = lc $field->data_type;
413 my %extra = $field->extra;
414 my $list = $extra{'list'} || [];
415 my $commalist = join( ', ', map { __PACKAGE__->_quote_string($_) } @$list );
417 if ($postgres_version >= 8.003 && $data_type eq 'enum') {
418 my $type_name = $extra{'custom_type_name'} || $field->table->name . '_' . $field->name . '_type';
419 $field_def .= ' '. $type_name;
420 my $new_type_def = "DROP TYPE IF EXISTS $type_name CASCADE;\n" .
421 "CREATE TYPE $type_name AS ENUM ($commalist)";
422 if (! exists $type_defs->{$type_name} ) {
423 $type_defs->{$type_name} = $new_type_def;
424 } elsif ( $type_defs->{$type_name} ne $new_type_def ) {
425 die "Attempted to redefine type name '$type_name' as a different type.\n";
428 $field_def .= ' '. convert_datatype($field);
434 __PACKAGE__->_apply_default_value(
440 'CURRENT_TIMESTAMP' => 'CURRENT_TIMESTAMP',
445 # Not null constraint
447 $field_def .= ' NOT NULL' unless $field->is_nullable;
450 # Geometry constraints
452 if (is_geometry($field)) {
453 foreach ( create_geometry_constraints($field, $options) ) {
454 my ($cdefs, $fks) = create_constraint($_, $options);
455 push @$constraint_defs, @$cdefs;
464 sub create_geometry_constraints {
465 my ($field, $options) = @_;
467 my $fname = _generator($options)->quote($field);
469 push @constraints, SQL::Translator::Schema::Constraint->new(
470 name => "enforce_dims_".$field->name,
471 expression => "(ST_NDims($fname) = ".$field->extra->{dimensions}.")",
472 table => $field->table,
476 push @constraints, SQL::Translator::Schema::Constraint->new(
477 name => "enforce_srid_".$field->name,
478 expression => "(ST_SRID($fname) = ".$field->extra->{srid}.")",
479 table => $field->table,
482 push @constraints, SQL::Translator::Schema::Constraint->new(
483 name => "enforce_geotype_".$field->name,
484 expression => "(GeometryType($fname) = ". __PACKAGE__->_quote_string($field->extra->{geometry_type}) ."::text OR $fname IS NULL)",
485 table => $field->table,
496 my ($index, $options) = @_;
498 my $generator = _generator($options);
499 my $table_name = $index->table->name;
501 my ($index_def, @constraint_defs);
505 || join('_', $table_name, 'idx', ++$index_name{ $table_name });
507 my $type = $index->type || NORMAL;
508 my @fields = $index->fields;
509 return unless @fields;
513 for my $opt ( $index->options ) {
514 if ( ref $opt eq 'HASH' ) {
515 foreach my $key (keys %$opt) {
516 my $value = $opt->{$key};
517 next unless defined $value;
518 if ( uc($key) eq 'USING' ) {
519 $index_using = "USING $value";
521 elsif ( uc($key) eq 'WHERE' ) {
522 $index_where = "WHERE $value";
528 my $def_start = 'CONSTRAINT ' . $generator->quote($name) . ' ';
529 my $field_names = '(' . join(", ", (map { $_ =~ /\(.*\)/ ? $_ : ( $generator->quote($_) ) } @fields)) . ')';
530 if ( $type eq PRIMARY_KEY ) {
531 push @constraint_defs, "${def_start}PRIMARY KEY ".$field_names;
533 elsif ( $type eq UNIQUE ) {
534 push @constraint_defs, "${def_start}UNIQUE " .$field_names;
536 elsif ( $type eq NORMAL ) {
538 'CREATE INDEX ' . $generator->quote($name) . ' on ' . $generator->quote($table_name) . ' ' .
539 join ' ', grep { defined } $index_using, $field_names, $index_where;
542 warn "Unknown index type ($type) on table $table_name.\n"
546 return $index_def, \@constraint_defs;
550 sub create_constraint
552 my ($c, $options) = @_;
554 my $generator = _generator($options);
555 my $table_name = $c->table->name;
556 my (@constraint_defs, @fks);
558 my $name = $c->name || '';
560 my @fields = grep { defined } $c->fields;
562 my @rfields = grep { defined } $c->reference_fields;
564 next if !@fields && $c->type ne CHECK_C;
565 my $def_start = $name ? 'CONSTRAINT ' . $generator->quote($name) . ' ' : '';
566 my $field_names = '(' . join(", ", (map { $_ =~ /\(.*\)/ ? $_ : ( $generator->quote($_) ) } @fields)) . ')';
567 if ( $c->type eq PRIMARY_KEY ) {
568 push @constraint_defs, "${def_start}PRIMARY KEY ".$field_names;
570 elsif ( $c->type eq UNIQUE ) {
571 push @constraint_defs, "${def_start}UNIQUE " .$field_names;
573 elsif ( $c->type eq CHECK_C ) {
574 my $expression = $c->expression;
575 push @constraint_defs, "${def_start}CHECK ($expression)";
577 elsif ( $c->type eq FOREIGN_KEY ) {
578 my $def .= "ALTER TABLE " . $generator->quote($table_name) . " ADD ${def_start}FOREIGN KEY $field_names"
579 . "\n REFERENCES " . $generator->quote($c->reference_table);
582 $def .= ' (' . join( ', ', map { $generator->quote($_) } @rfields ) . ')';
585 if ( $c->match_type ) {
587 ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
590 if ( $c->on_delete ) {
591 $def .= ' ON DELETE '. $c->on_delete;
594 if ( $c->on_update ) {
595 $def .= ' ON UPDATE '. $c->on_update;
598 if ( $c->deferrable ) {
599 $def .= ' DEFERRABLE';
605 return \@constraint_defs, \@fks;
609 my ($trigger,$options) = @_;
610 my $generator = _generator($options);
614 push @statements, sprintf( 'DROP TRIGGER IF EXISTS %s', $generator->quote($trigger->name) )
615 if $options->{add_drop_trigger};
617 my $scope = $trigger->scope || '';
618 $scope = " FOR EACH $scope" if $scope;
620 push @statements, sprintf(
621 'CREATE TRIGGER %s %s %s ON %s%s %s',
622 $generator->quote($trigger->name),
623 $trigger->perform_action_when,
624 join( ' OR ', @{ $trigger->database_events } ),
625 $generator->quote($trigger->on_table),
637 my @size = $field->size;
638 my $data_type = lc $field->data_type;
639 my $array = $data_type =~ s/\[\]$//;
641 if ( $data_type eq 'enum' ) {
643 # $len = ($len < length($_)) ? length($_) : $len for (@$list);
644 # my $chk_name = mk_name( $table_name.'_'.$field_name, 'chk' );
645 # push @$constraint_defs,
646 # 'CONSTRAINT "$chk_name" CHECK (' . $generator->quote(field_name) .
647 # qq[IN ($commalist))];
648 $data_type = 'character varying';
650 elsif ( $data_type eq 'set' ) {
651 $data_type = 'character varying';
653 elsif ( $field->is_auto_increment ) {
654 if ( (defined $size[0] && $size[0] > 11) or $data_type eq 'bigint' ) {
655 $data_type = 'bigserial';
658 $data_type = 'serial';
663 $data_type = defined $translate{ lc $data_type } ?
664 $translate{ lc $data_type } :
668 if ( $data_type =~ /^time/i || $data_type =~ /^interval/i ) {
669 if ( defined $size[0] && $size[0] > 6 ) {
674 if ( $data_type eq 'integer' ) {
675 if ( defined $size[0] && $size[0] > 0) {
676 if ( $size[0] > 10 ) {
677 $data_type = 'bigint';
679 elsif ( $size[0] < 5 ) {
680 $data_type = 'smallint';
683 $data_type = 'integer';
687 $data_type = 'integer';
691 my $type_with_size = join('|',
692 'bit', 'varbit', 'character', 'bit varying', 'character varying',
693 'time', 'timestamp', 'interval', 'numeric', 'float'
696 if ( $data_type !~ /$type_with_size/ ) {
700 if (defined $size[0] && $size[0] > 0 && $data_type =~ /^time/i ) {
701 $data_type =~ s/^(time.*?)( with.*)?$/$1($size[0])/;
702 $data_type .= $2 if(defined $2);
703 } elsif ( defined $size[0] && $size[0] > 0 ) {
704 $data_type .= '(' . join( ',', @size ) . ')';
714 if($data_type eq 'geography'){
715 $data_type .= '('.$field->extra->{geography_type}.','. $field->extra->{srid} .')'
724 my ($from_field, $to_field, $options) = @_;
726 die "Can't alter field in another table"
727 if($from_field->table->name ne $to_field->table->name);
729 my $generator = _generator($options);
732 # drop geometry column and constraints
734 drop_geometry_column($from_field, $options),
735 drop_geometry_constraints($from_field, $options),
736 if is_geometry($from_field);
738 # it's necessary to start with rename column cause this would affect
739 # all of the following statements which would be broken if do the
741 # BUT: drop geometry is done before the rename, cause it work's on the
742 # $from_field directly
743 push @out, sprintf('ALTER TABLE %s RENAME COLUMN %s TO %s',
744 map($generator->quote($_),
745 $to_field->table->name,
750 if($from_field->name ne $to_field->name);
752 push @out, sprintf('ALTER TABLE %s ALTER COLUMN %s SET NOT NULL',
753 map($generator->quote($_),
754 $to_field->table->name,
758 if(!$to_field->is_nullable and $from_field->is_nullable);
760 push @out, sprintf('ALTER TABLE %s ALTER COLUMN %s DROP NOT NULL',
761 map($generator->quote($_),
762 $to_field->table->name,
766 if (!$from_field->is_nullable and $to_field->is_nullable);
769 my $from_dt = convert_datatype($from_field);
770 my $to_dt = convert_datatype($to_field);
771 push @out, sprintf('ALTER TABLE %s ALTER COLUMN %s TYPE %s',
772 map($generator->quote($_),
773 $to_field->table->name,
778 if($to_dt ne $from_dt);
780 my $old_default = $from_field->default_value;
781 my $new_default = $to_field->default_value;
782 my $default_value = $to_field->default_value;
784 # fixes bug where output like this was created:
785 # ALTER TABLE users ALTER COLUMN column SET DEFAULT ThisIsUnescaped;
786 if(ref $default_value eq "SCALAR" ) {
787 $default_value = $$default_value;
788 } elsif( defined $default_value && $to_dt =~ /^(character|text)/xsmi ) {
789 $default_value = __PACKAGE__->_quote_string($default_value);
792 push @out, sprintf('ALTER TABLE %s ALTER COLUMN %s SET DEFAULT %s',
793 map($generator->quote($_),
794 $to_field->table->name,
799 if ( defined $new_default &&
800 (!defined $old_default || $old_default ne $new_default) );
802 # fixes bug where removing the DEFAULT statement of a column
803 # would result in no change
805 push @out, sprintf('ALTER TABLE %s ALTER COLUMN %s DROP DEFAULT',
806 map($generator->quote($_),
807 $to_field->table->name,
811 if ( !defined $new_default && defined $old_default );
813 # add geometry column and constraints
815 add_geometry_column($to_field, $options),
816 add_geometry_constraints($to_field, $options),
817 if is_geometry($to_field);
819 return wantarray ? @out : join(";\n", @out);
822 sub rename_field { alter_field(@_) }
826 my ($new_field,$options) = @_;
828 my $out = sprintf('ALTER TABLE %s ADD COLUMN %s',
829 _generator($options)->quote($new_field->table->name),
830 create_field($new_field, $options));
831 $out .= ";\n".add_geometry_column($new_field, $options)
832 . ";\n".add_geometry_constraints($new_field, $options)
833 if is_geometry($new_field);
840 my ($old_field, $options) = @_;
842 my $generator = _generator($options);
844 my $out = sprintf('ALTER TABLE %s DROP COLUMN %s',
845 $generator->quote($old_field->table->name),
846 $generator->quote($old_field->name));
847 $out .= ";\n".drop_geometry_column($old_field, $options)
848 if is_geometry($old_field);
852 sub add_geometry_column {
853 my ($field, $options) = @_;
856 "INSERT INTO geometry_columns VALUES (%s,%s,%s,%s,%s,%s,%s)",
857 map(__PACKAGE__->_quote_string($_),
859 $field->table->schema->name,
860 $options->{table} ? $options->{table} : $field->table->name,
862 $field->extra->{dimensions},
863 $field->extra->{srid},
864 $field->extra->{geometry_type},
869 sub drop_geometry_column {
873 "DELETE FROM geometry_columns WHERE f_table_schema = %s AND f_table_name = %s AND f_geometry_column = %s",
874 map(__PACKAGE__->_quote_string($_),
875 $field->table->schema->name,
882 sub add_geometry_constraints {
883 my ($field, $options) = @_;
885 return join(";\n", map { alter_create_constraint($_, $options) }
886 create_geometry_constraints($field, $options));
889 sub drop_geometry_constraints {
890 my ($field, $options) = @_;
892 return join(";\n", map { alter_drop_constraint($_, $options) }
893 create_geometry_constraints($field, $options));
898 my ($to_table, $options) = @_;
899 my $generator = _generator($options);
900 my $out = sprintf('ALTER TABLE %s %s',
901 $generator->quote($to_table->name),
902 $options->{alter_table_action});
903 $out .= ";\n".$options->{geometry_changes} if $options->{geometry_changes};
908 my ($old_table, $new_table, $options) = @_;
909 my $generator = _generator($options);
910 $options->{alter_table_action} = "RENAME TO " . $generator->quote($new_table);
912 my @geometry_changes = map {
913 drop_geometry_column($_, $options),
914 add_geometry_column($_, { %{$options}, table => $new_table }),
915 } grep { is_geometry($_) } $old_table->get_fields;
917 $options->{geometry_changes} = join (";\n",@geometry_changes) if @geometry_changes;
919 return alter_table($old_table, $options);
922 sub alter_create_index {
923 my ($index, $options) = @_;
924 my $generator = _generator($options);
925 my ($idef, $constraints) = create_index($index, $options);
926 return $index->type eq NORMAL ? $idef
927 : sprintf('ALTER TABLE %s ADD %s',
928 $generator->quote($index->table->name),
929 join(q{}, @$constraints)
933 sub alter_drop_index {
934 my ($index, $options) = @_;
935 return 'DROP INDEX '. _generator($options)->quote($index->name);
938 sub alter_drop_constraint {
939 my ($c, $options) = @_;
940 my $generator = _generator($options);
942 # attention: Postgres has a very special naming structure for naming
943 # foreign keys and primary keys. It names them using the name of the
944 # table as prefix and fkey or pkey as suffix, concatenated by an underscore
947 # Already has a name, just use it
949 } elsif ( $c->type eq FOREIGN_KEY ) {
950 # Doesn't have a name, and is foreign key, append '_fkey'
951 $c_name = $c->table->name . '_' . ($c->fields)[0] . '_fkey';
952 } elsif ( $c->type eq PRIMARY_KEY ) {
953 # Doesn't have a name, and is primary key, append '_pkey'
954 $c_name = $c->table->name . '_pkey';
958 'ALTER TABLE %s DROP CONSTRAINT %s',
959 map { $generator->quote($_) } $c->table->name, $c_name,
963 sub alter_create_constraint {
964 my ($index, $options) = @_;
965 my $generator = _generator($options);
966 my ($defs, $fks) = create_constraint(@_);
968 # return if there are no constraint definitions so we don't run
969 # into output like this:
970 # ALTER TABLE users ADD ;
972 return unless(@{$defs} || @{$fks});
973 return $index->type eq FOREIGN_KEY ? join(q{}, @{$fks})
974 : join( ' ', 'ALTER TABLE', $generator->quote($index->table->name),
975 'ADD', join(q{}, @{$defs}, @{$fks})
980 my ($table, $options) = @_;
981 my $generator = _generator($options);
982 my $out = "DROP TABLE " . $generator->quote($table) . " CASCADE";
984 my @geometry_drops = map { drop_geometry_column($_); } grep { is_geometry($_) } $table->get_fields;
986 $out .= join(";\n", '', @geometry_drops) if @geometry_drops;
990 sub batch_alter_table {
991 my ( $table, $diff_hash, $options ) = @_;
993 # as long as we're not renaming the table we don't need to be here
994 if ( @{$diff_hash->{rename_table}} == 0 ) {
995 return batch_alter_table_statements($diff_hash, $options);
998 # first we need to perform drops which are on old table
999 my @sql = batch_alter_table_statements($diff_hash, $options, qw(
1000 alter_drop_constraint
1005 # next comes the rename_table
1006 my $old_table = $diff_hash->{rename_table}[0][0];
1007 push @sql, rename_table( $old_table, $table, $options );
1009 # for alter_field (and so also rename_field) we need to make sure old
1010 # field has table name set to new table otherwise calling alter_field dies
1011 $diff_hash->{alter_field} =
1012 [map { $_->[0]->table($table) && $_ } @{$diff_hash->{alter_field}}];
1013 $diff_hash->{rename_field} =
1014 [map { $_->[0]->table($table) && $_ } @{$diff_hash->{rename_field}}];
1016 # now add everything else
1017 push @sql, batch_alter_table_statements($diff_hash, $options, qw(
1022 alter_create_constraint
1031 # -------------------------------------------------------------------
1032 # Life is full of misery, loneliness, and suffering --
1033 # and it's all over much too soon.
1035 # -------------------------------------------------------------------
1041 SQL::Translator, SQL::Translator::Producer::Oracle.
1045 Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>.