1 package SQL::Translator::Producer::MySQL;
3 # -------------------------------------------------------------------
4 # Copyright (C) 2002-2009 SQLFairy Authors
6 # This program is free software; you can redistribute it and/or
7 # modify it under the terms of the GNU General Public License as
8 # published by the Free Software Foundation; version 2.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 # -------------------------------------------------------------------
23 SQL::Translator::Producer::MySQL - MySQL-specific producer for SQL::Translator
27 Use via SQL::Translator:
31 my $t = SQL::Translator->new( parser => '...', producer => 'MySQL', '...' );
36 This module will produce text output of the schema suitable for MySQL.
37 There are still some issues to be worked out with syntax differences
38 between MySQL versions 3 and 4 ("SET foreign_key_checks," character sets
43 This producer takes a single optional producer_arg C<mysql_version>, which
44 provides the desired version for the target database. By default MySQL v3 is
45 assumed, and statements pertaining to any features introduced in later versions
46 (e.g. CREATE VIEW) are not produced.
48 Valid version specifiers for C<mysql_version> are listed L<here|SQL::Translator::Utils/parse_mysql_version>
52 Normally the tables will be created without any explicit table type given and
53 so will use the MySQL default.
55 Any tables involved in foreign key constraints automatically get a table type
56 of InnoDB, unless this is overridden by setting the C<mysql_table_type> extra
57 attribute explicitly on the table.
59 =head2 Extra attributes.
61 The producer recognises the following extra attributes on the Schema objects.
67 Set the list of allowed values for Enum fields.
69 =item B<field.binary>, B<field.unsigned>, B<field.zerofill>
71 Set the MySQL field options of the same name.
73 =item B<field.renamed_from>, B<table.renamed_from>
75 Use when producing diffs to indicate that the current table/field has been
76 renamed from the old name as given in the attribute value.
78 =item B<table.mysql_table_type>
80 Set the type of the table e.g. 'InnoDB', 'MyISAM'. This will be
81 automatically set for tables involved in foreign key constraints if it is
82 not already set explicitly. See L<"Table Types">.
84 Please note that the C<ENGINE> option is the preferred method of specifying
85 the MySQL storage engine to use, but this method still works for backwards
88 =item B<table.mysql_charset>, B<table.mysql_collate>
90 Set the tables default charater set and collation order.
92 =item B<field.mysql_charset>, B<field.mysql_collate>
94 Set the fields charater set and collation order.
102 use vars qw[ $VERSION $DEBUG %used_names ];
104 $DEBUG = 0 unless defined $DEBUG;
106 # Maximum length for most identifiers is 64, according to:
107 # http://dev.mysql.com/doc/refman/4.1/en/identifiers.html
108 # http://dev.mysql.com/doc/refman/5.0/en/identifiers.html
109 my $DEFAULT_MAX_ID_LENGTH = 64;
112 use SQL::Translator::Schema::Constants;
113 use SQL::Translator::Utils qw(debug header_comment
114 truncate_id_uniquely parse_mysql_version);
117 # Use only lowercase for the keys (e.g. "long" and not "LONG")
123 varchar2 => 'varchar',
139 'long integer' => 'integer',
141 'datetime' => 'datetime',
150 # Column types that do not support lenth attribute
152 my @no_length_attr = qw/
153 date time timestamp datetime year
157 sub preprocess_schema {
160 # extra->{mysql_table_type} used to be the type. It belongs in options, so
161 # move it if we find it. Return Engine type if found in extra or options
162 # Similarly for mysql_charset and mysql_collate
163 my $extra_to_options = sub {
164 my ($table, $extra_name, $opt_name) = @_;
166 my $extra = $table->extra;
168 my $extra_type = delete $extra->{$extra_name};
170 # Now just to find if there is already an Engine or Type option...
171 # and lets normalize it to ENGINE since:
173 # The ENGINE table option specifies the storage engine for the table.
174 # TYPE is a synonym, but ENGINE is the preferred option name.
177 # We have to use the hash directly here since otherwise there is no way
179 my $options = ( $table->{options} ||= []);
181 # If multiple option names, normalize to the first one
183 OPT_NAME: for ( @$opt_name[1..$#$opt_name] ) {
184 for my $idx ( 0..$#{$options} ) {
185 my ($key, $value) = %{ $options->[$idx] };
188 $options->[$idx] = { $opt_name->[0] => $value };
193 $opt_name = $opt_name->[0];
198 # This assumes that there isn't both a Type and an Engine option.
200 for my $idx ( 0..$#{$options} ) {
201 my ($key, $value) = %{ $options->[$idx] };
203 next unless uc $key eq $opt_name;
205 # make sure case is right on option name
206 delete $options->[$idx]{$key};
207 return $options->[$idx]{$opt_name} = $value || $extra_type;
212 push @$options, { $opt_name => $extra_type };
218 # Names are only specific to a given schema
219 local %used_names = ();
222 # Work out which tables need to be InnoDB to support foreign key
223 # constraints. We do this first as we need InnoDB at both ends.
225 foreach my $table ( $schema->get_tables ) {
227 $extra_to_options->($table, 'mysql_table_type', ['ENGINE', 'TYPE'] );
228 $extra_to_options->($table, 'mysql_charset', 'CHARACTER SET' );
229 $extra_to_options->($table, 'mysql_collate', 'COLLATE' );
231 foreach my $c ( $table->get_constraints ) {
232 next unless $c->type eq FOREIGN_KEY;
234 # Normalize constraint names here.
235 my $c_name = $c->name;
236 # Give the constraint a name if it doesn't have one, so it doens't feel
238 $c_name = $table->name . '_fk' unless length $c_name;
240 $c->name( next_unused_name($c_name) );
242 for my $meth (qw/table reference_table/) {
243 my $table = $schema->get_table($c->$meth) || next;
244 # This normalizes the types to ENGINE and returns the value if its there
245 next if $extra_to_options->($table, 'mysql_table_type', ['ENGINE', 'TYPE']);
246 $table->options( { 'ENGINE' => 'InnoDB' } );
248 } # foreach constraints
250 my %map = ( mysql_collate => 'collate', mysql_charset => 'character set');
251 foreach my $f ( $table->get_fields ) {
252 my $extra = $f->extra;
254 $extra->{$map{$_}} = delete $extra->{$_} if exists $extra->{$_};
258 if ( !$size[0] && $f->data_type =~ /char$/ ) {
267 my $translator = shift;
268 local $DEBUG = $translator->debug;
270 my $no_comments = $translator->no_comments;
271 my $add_drop_table = $translator->add_drop_table;
272 my $schema = $translator->schema;
273 my $show_warnings = $translator->show_warnings || 0;
274 my $producer_args = $translator->producer_args;
275 my $mysql_version = parse_mysql_version ($producer_args->{mysql_version}, 'perl') || 0;
276 my $max_id_length = $producer_args->{mysql_max_id_length} || $DEFAULT_MAX_ID_LENGTH;
278 my ($qt, $qf, $qc) = ('','', '');
279 $qt = '`' if $translator->quote_table_names;
280 $qf = '`' if $translator->quote_field_names;
282 debug("PKG: Beginning production\n");
285 $create .= header_comment unless ($no_comments);
286 # \todo Don't set if MySQL 3.x is set on command line
287 my @create = "SET foreign_key_checks=0";
289 preprocess_schema($schema);
296 for my $table ( $schema->get_tables ) {
297 # print $table->name, "\n";
298 push @table_defs, create_table($table,
299 { add_drop_table => $add_drop_table,
300 show_warnings => $show_warnings,
301 no_comments => $no_comments,
302 quote_table_names => $qt,
303 quote_field_names => $qf,
304 max_id_length => $max_id_length,
305 mysql_version => $mysql_version
309 if ($mysql_version >= 5.000001) {
310 for my $view ( $schema->get_views ) {
311 push @table_defs, create_view($view,
312 { add_replace_view => $add_drop_table,
313 show_warnings => $show_warnings,
314 no_comments => $no_comments,
315 quote_table_names => $qt,
316 quote_field_names => $qf,
317 max_id_length => $max_id_length,
318 mysql_version => $mysql_version
323 if ($mysql_version >= 5.000002) {
324 for my $trigger ( $schema->get_triggers ) {
325 push @table_defs, create_trigger($trigger,
326 { add_drop_trigger => $add_drop_table,
327 show_warnings => $show_warnings,
328 no_comments => $no_comments,
329 quote_table_names => $qt,
330 quote_field_names => $qf,
331 max_id_length => $max_id_length,
332 mysql_version => $mysql_version
338 # print "@table_defs\n";
339 push @table_defs, "SET foreign_key_checks=1";
341 return wantarray ? ($create ? $create : (), @create, @table_defs) : ($create . join('', map { $_ ? "$_;\n\n" : () } (@create, @table_defs)));
345 my ($trigger, $options) = @_;
346 my $qt = $options->{quote_table_names} || '';
347 my $qf = $options->{quote_field_names} || '';
349 my $trigger_name = $trigger->name;
350 debug("PKG: Looking at trigger '${trigger_name}'\n");
354 my $events = $trigger->database_events;
355 for my $event ( @$events ) {
356 my $name = $trigger_name;
360 warn "Multiple database events supplied for trigger '${trigger_name}', ",
361 "creating trigger '${name}' for the '${event}' event\n"
362 if $options->{show_warnings};
365 my $action = $trigger->action;
366 $action .= ";" unless $action =~ /;\s*\z/;
368 push @statements, "DROP TRIGGER IF EXISTS ${qt}${name}${qt}" if $options->{add_drop_trigger};
369 push @statements, sprintf(
370 "CREATE TRIGGER ${qt}%s${qt} %s %s ON ${qt}%s${qt}\n FOR EACH ROW BEGIN %s END",
371 $name, $trigger->perform_action_when, $event, $trigger->on_table, $action,
375 # Tack the comment onto the first statement
376 $statements[0] = "--\n-- Trigger ${qt}${trigger_name}${qt}\n--\n" . $statements[0] unless $options->{no_comments};
381 my ($view, $options) = @_;
382 my $qt = $options->{quote_table_names} || '';
383 my $qf = $options->{quote_field_names} || '';
385 my $view_name = $view->name;
386 debug("PKG: Looking at view '${view_name}'\n");
388 # Header. Should this look like what mysqldump produces?
390 $create .= "--\n-- View: ${qt}${view_name}${qt}\n--\n" unless $options->{no_comments};
392 $create .= ' OR REPLACE' if $options->{add_replace_view};
395 my $extra = $view->extra;
397 if( exists($extra->{mysql_algorithm}) && defined(my $algorithm = $extra->{mysql_algorithm}) ){
398 $create .= " ALGORITHM = ${algorithm}\n" if $algorithm =~ /(?:UNDEFINED|MERGE|TEMPTABLE)/i;
401 if( exists($extra->{mysql_definer}) && defined(my $user = $extra->{mysql_definer}) ){
402 $create .= " DEFINER = ${user}\n";
405 if( exists($extra->{mysql_security}) && defined(my $security = $extra->{mysql_security}) ){
406 $create .= " SQL SECURITY ${security}\n" if $security =~ /(?:DEFINER|INVOKER)/i;
410 $create .= " VIEW ${qt}${view_name}${qt}";
412 if( my @fields = $view->fields ){
413 my $list = join ', ', map { "${qf}${_}${qf}"} @fields;
414 $create .= " ( ${list} )";
416 if( my $sql = $view->sql ){
417 # do not wrap parenthesis around the selector, mysql doesn't like this
418 # http://bugs.mysql.com/bug.php?id=9198
419 $create .= " AS\n ${sql}\n";
427 my ($table, $options) = @_;
429 my $qt = $options->{quote_table_names} || '';
430 my $qf = $options->{quote_field_names} || '';
432 my $table_name = quote_table_name($table->name, $qt);
433 debug("PKG: Looking at table '$table_name'\n");
436 # Header. Should this look like what mysqldump produces?
440 $create .= "--\n-- Table: $table_name\n--\n" unless $options->{no_comments};
441 $drop = qq[DROP TABLE IF EXISTS $table_name] if $options->{add_drop_table};
442 $create .= "CREATE TABLE $table_name (\n";
448 for my $field ( $table->get_fields ) {
449 push @field_defs, create_field($field, $options);
457 for my $index ( $table->get_indices ) {
458 push @index_defs, create_index($index, $options);
459 $indexed_fields{ $_ } = 1 for $index->fields;
463 # Constraints -- need to handle more than just FK. -ky
466 my @constraints = $table->get_constraints;
467 for my $c ( @constraints ) {
468 my $constr = create_constraint($c, $options);
469 push @constraint_defs, $constr if($constr);
471 unless ( $indexed_fields{ ($c->fields())[0] } || $c->type ne FOREIGN_KEY ) {
472 push @index_defs, "INDEX ($qf" . ($c->fields())[0] . "$qf)";
473 $indexed_fields{ ($c->fields())[0] } = 1;
477 $create .= join(",\n", map { " $_" }
478 @field_defs, @index_defs, @constraint_defs
485 $create .= generate_table_options($table, $options) || '';
486 # $create .= ";\n\n";
488 return $drop ? ($drop,$create) : $create;
491 sub quote_table_name {
492 my ($table_name, $qt) = @_;
494 $table_name =~ s/\./$qt.$qt/g;
496 return "$qt$table_name$qt";
499 sub generate_table_options
501 my ($table, $options) = @_;
504 my $table_type_defined = 0;
505 my $qf = $options->{quote_field_names} ||= '';
506 my $charset = $table->extra('mysql_charset');
507 my $collate = $table->extra('mysql_collate');
509 for my $t1_option_ref ( $table->options ) {
510 my($key, $value) = %{$t1_option_ref};
511 $table_type_defined = 1
512 if uc $key eq 'ENGINE' or uc $key eq 'TYPE';
513 if (uc $key eq 'CHARACTER SET') {
516 } elsif (uc $key eq 'COLLATE') {
519 } elsif (uc $key eq 'UNION') {
520 $union = "($qf". join("$qf, $qf", @$value) ."$qf)";
523 $create .= " $key=$value";
526 my $mysql_table_type = $table->extra('mysql_table_type');
527 $create .= " ENGINE=$mysql_table_type"
528 if $mysql_table_type && !$table_type_defined;
529 my $comments = $table->comments;
531 $create .= " DEFAULT CHARACTER SET $charset" if $charset;
532 $create .= " COLLATE $collate" if $collate;
533 $create .= " UNION=$union" if $union;
534 $create .= qq[ comment='$comments'] if $comments;
540 my ($field, $options) = @_;
542 my $qf = $options->{quote_field_names} ||= '';
544 my $field_name = $field->name;
545 debug("PKG: Looking at field '$field_name'\n");
546 my $field_def = "$qf$field_name$qf";
549 my $data_type = $field->data_type;
550 my @size = $field->size;
551 my %extra = $field->extra;
552 my $list = $extra{'list'} || [];
553 # \todo deal with embedded quotes
554 my $commalist = join( ', ', map { qq['$_'] } @$list );
555 my $charset = $extra{'mysql_charset'};
556 my $collate = $extra{'mysql_collate'};
558 my $mysql_version = $options->{mysql_version} || 0;
560 # Oracle "number" type -- figure best MySQL type
562 if ( lc $data_type eq 'number' ) {
564 if ( scalar @size > 1 ) {
565 $data_type = 'double';
567 elsif ( $size[0] && $size[0] >= 12 ) {
568 $data_type = 'bigint';
570 elsif ( $size[0] && $size[0] <= 1 ) {
571 $data_type = 'tinyint';
578 # Convert a large Oracle varchar to "text"
579 # (not necessary as of 5.0.3 http://dev.mysql.com/doc/refman/5.0/en/char.html)
581 elsif ( $data_type =~ /char/i && $size[0] > 255 ) {
582 unless ($size[0] <= 65535 && $mysql_version >= 5.000003 ) {
587 elsif ( $data_type =~ /boolean/i ) {
588 if ($mysql_version >= 4) {
589 $data_type = 'boolean';
592 $commalist = "'0','1'";
595 elsif ( exists $translate{ lc $data_type } ) {
596 $data_type = $translate{ lc $data_type };
599 @size = () if $data_type =~ /(text|blob)/i;
601 if ( $data_type =~ /(double|float)/ && scalar @size == 1 ) {
605 $field_def .= " $data_type";
607 if ( lc($data_type) eq 'enum' || lc($data_type) eq 'set') {
608 $field_def .= '(' . $commalist . ')';
611 defined $size[0] && $size[0] > 0
613 ! grep lc($data_type) eq $_, @no_length_attr
615 $field_def .= '(' . join( ', ', @size ) . ')';
619 $field_def .= " CHARACTER SET $charset" if $charset;
620 $field_def .= " COLLATE $collate" if $collate;
623 for my $qual ( qw[ binary unsigned zerofill ] ) {
624 my $val = $extra{ $qual } || $extra{ uc $qual } or next;
625 $field_def .= " $qual";
627 for my $qual ( 'character set', 'collate', 'on update' ) {
628 my $val = $extra{ $qual } || $extra{ uc $qual } or next;
629 $field_def .= " $qual $val";
633 $field_def .= ' NOT NULL' unless $field->is_nullable;
636 SQL::Translator::Producer->_apply_default_value(
644 if ( my $comments = $field->comments ) {
645 $field_def .= qq[ comment '$comments'];
649 $field_def .= " auto_increment" if $field->is_auto_increment;
654 sub alter_create_index
656 my ($index, $options) = @_;
658 my $qt = $options->{quote_table_names} || '';
659 my $qf = $options->{quote_field_names} || '';
663 $qt.$index->table->name.$qt,
671 my ( $index, $options ) = @_;
673 my $qf = $options->{quote_field_names} || '';
678 lc $index->type eq 'normal' ? 'INDEX' : $index->type . ' INDEX',
680 ? $qf . truncate_id_uniquely(
682 $options->{max_id_length} || $DEFAULT_MAX_ID_LENGTH
685 '(' . $qf . join( "$qf, $qf", $index->fields ) . $qf . ')'
691 my ($index, $options) = @_;
693 my $qt = $options->{quote_table_names} || '';
694 my $qf = $options->{quote_field_names} || '';
698 $qt.$index->table->name.$qt,
701 $index->name || $index->fields
706 sub alter_drop_constraint
708 my ($c, $options) = @_;
710 my $qt = $options->{quote_table_names} || '';
711 my $qc = $options->{quote_field_names} || '';
713 my $out = sprintf('ALTER TABLE %s DROP %s %s',
714 $qt . $c->table->name . $qt,
715 $c->type eq FOREIGN_KEY ? $c->type : "INDEX",
716 $qc . $c->name . $qc );
721 sub alter_create_constraint
723 my ($index, $options) = @_;
725 my $qt = $options->{quote_table_names} || '';
728 $qt.$index->table->name.$qt,
730 create_constraint(@_) );
733 sub create_constraint
735 my ($c, $options) = @_;
737 my $qf = $options->{quote_field_names} || '';
738 my $qt = $options->{quote_table_names} || '';
739 my $leave_name = $options->{leave_name} || undef;
741 my @fields = $c->fields or next;
743 if ( $c->type eq PRIMARY_KEY ) {
744 return 'PRIMARY KEY (' . $qf . join("$qf, $qf", @fields). $qf . ')';
746 elsif ( $c->type eq UNIQUE ) {
749 (defined $c->name ? $qf.truncate_id_uniquely( $c->name, $options->{max_id_length} || $DEFAULT_MAX_ID_LENGTH ).$qf.' ' : '').
750 '(' . $qf . join("$qf, $qf", @fields). $qf . ')';
752 elsif ( $c->type eq FOREIGN_KEY ) {
754 # Make sure FK field is indexed or MySQL complains.
757 my $table = $c->table;
758 my $c_name = truncate_id_uniquely( $c->name, $options->{max_id_length} || $DEFAULT_MAX_ID_LENGTH );
768 $def .= ' ('.$qf . join( "$qf, $qf", @fields ) . $qf . ')';
770 $def .= ' REFERENCES ' . $qt . $c->reference_table . $qt;
772 my @rfields = map { $_ || () } $c->reference_fields;
773 unless ( @rfields ) {
774 my $rtable_name = $c->reference_table;
775 if ( my $ref_table = $table->schema->get_table( $rtable_name ) ) {
776 push @rfields, $ref_table->primary_key;
779 warn "Can't find reference table '$rtable_name' " .
780 "in schema\n" if $options->{show_warnings};
785 $def .= ' (' . $qf . join( "$qf, $qf", @rfields ) . $qf . ')';
788 warn "FK constraint on " . $table->name . '.' .
789 join('', @fields) . " has no reference fields\n"
790 if $options->{show_warnings};
793 if ( $c->match_type ) {
795 ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
798 if ( $c->on_delete ) {
799 $def .= ' ON DELETE '.join( ' ', $c->on_delete );
802 if ( $c->on_update ) {
803 $def .= ' ON UPDATE '.join( ' ', $c->on_update );
813 my ($to_table, $options) = @_;
815 my $qt = $options->{quote_table_names} || '';
817 my $table_options = generate_table_options($to_table, $options) || '';
818 my $out = sprintf('ALTER TABLE %s%s',
819 $qt . $to_table->name . $qt,
825 sub rename_field { alter_field(@_) }
828 my ($from_field, $to_field, $options) = @_;
830 my $qf = $options->{quote_field_names} || '';
831 my $qt = $options->{quote_table_names} || '';
833 my $out = sprintf('ALTER TABLE %s CHANGE COLUMN %s %s',
834 $qt . $to_field->table->name . $qt,
835 $qf . $from_field->name . $qf,
836 create_field($to_field, $options));
843 my ($new_field, $options) = @_;
845 my $qt = $options->{quote_table_names} || '';
847 my $out = sprintf('ALTER TABLE %s ADD COLUMN %s',
848 $qt . $new_field->table->name . $qt,
849 create_field($new_field, $options));
857 my ($old_field, $options) = @_;
859 my $qf = $options->{quote_field_names} || '';
860 my $qt = $options->{quote_table_names} || '';
862 my $out = sprintf('ALTER TABLE %s DROP COLUMN %s',
863 $qt . $old_field->table->name . $qt,
864 $qf . $old_field->name . $qf);
870 sub batch_alter_table {
871 my ($table, $diff_hash, $options) = @_;
873 # InnoDB has an issue with dropping and re-adding a FK constraint under the
874 # name in a single alter statment, see: http://bugs.mysql.com/bug.php?id=13741
876 # We have to work round this.
879 my %fks_to_drop = map {
880 $_->type eq FOREIGN_KEY
883 } @{$diff_hash->{alter_drop_constraint} };
885 my %fks_to_create = map {
886 if ( $_->type eq FOREIGN_KEY) {
887 $fks_to_alter{$_->name} = $fks_to_drop{$_->name} if $fks_to_drop{$_->name};
890 } @{$diff_hash->{alter_create_constraint} };
893 if (scalar keys %fks_to_alter) {
894 $diff_hash->{alter_drop_constraint} = [
895 grep { !$fks_to_alter{$_->name} } @{ $diff_hash->{alter_drop_constraint} }
898 @drop_stmt = batch_alter_table($table, { alter_drop_constraint => [ values %fks_to_alter ] }, $options);
903 if (@{ $diff_hash->{$_} || [] }) {
904 my $meth = __PACKAGE__->can($_) or die __PACKAGE__ . " cant $_";
905 map { $meth->( (ref $_ eq 'ARRAY' ? @$_ : $_), $options ) } @{ $diff_hash->{$_} }
908 alter_drop_constraint
915 alter_create_constraint
918 # rename_table makes things a bit more complex
919 my $renamed_from = "";
920 $renamed_from = $diff_hash->{rename_table}[0][0]->name
921 if $diff_hash->{rename_table} && @{$diff_hash->{rename_table}};
923 return unless @stmts;
924 # Just zero or one stmts. return now
925 return (@drop_stmt,@stmts) unless @stmts > 1;
927 # Now strip off the 'ALTER TABLE xyz' of all but the first one
929 my $qt = $options->{quote_table_names} || '';
930 my $table_name = $qt . $table->name . $qt;
933 my $re = $renamed_from
934 ? qr/^ALTER TABLE (?:\Q$table_name\E|\Q$qt$renamed_from$qt\E) /
935 : qr/^ALTER TABLE \Q$table_name\E /;
937 my $first = shift @stmts;
938 my ($alter_table) = $first =~ /($re)/;
940 my $padd = " " x length($alter_table);
942 return @drop_stmt, join( ",\n", $first, map { s/$re//; $padd . $_ } @stmts);
947 my ($table, $options) = @_;
949 my $qt = $options->{quote_table_names} || '';
951 # Drop (foreign key) constraints so table drops cleanly
952 my @sql = batch_alter_table($table, { alter_drop_constraint => [ grep { $_->type eq 'FOREIGN KEY' } $table->get_constraints ] }, $options);
954 return (@sql, "DROP TABLE $qt$table$qt");
955 # return join("\n", @sql, "DROP TABLE $qt$table$qt");
960 my ($old_table, $new_table, $options) = @_;
962 my $qt = $options->{quote_table_names} || '';
964 return "ALTER TABLE $qt$old_table$qt RENAME TO $qt$new_table$qt";
967 sub next_unused_name {
968 my $name = shift || '';
969 if ( !defined($used_names{$name}) ) {
970 $used_names{$name} = $name;
975 while ( defined($used_names{$name . '_' . $i}) ) {
979 $used_names{$name} = $name;
985 # -------------------------------------------------------------------
991 SQL::Translator, http://www.mysql.com/.
995 darren chamberlain E<lt>darren@cpan.orgE<gt>,
996 Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>.