projects / dbsrgits/SQL-Translator-2.0-ish.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | history | HEAD
remove warning
[dbsrgits/SQL-Translator-2.0-ish.git] / lib / SQL / Translator / Producer / SQL / MySQL.pm
CommitLineData
24e6a53a 1use MooseX::Declare;
2role SQL::Translator::Producer::SQL::MySQL {
3 use SQL::Translator::Constants qw(:sqlt_types :sqlt_constants);
4 use SQL::Translator::Types qw(Column Constraint Index Table View);
5 my $DEFAULT_MAX_ID_LENGTH = 64;
6 my %used_names;
7
8 #
9 # Use only lowercase for the keys (e.g. "long" and not "LONG")
10 #
11 my %translate = (
12 #
13 # Oracle types
14 #
15 varchar2 => 'varchar',
16 long => 'text',
17 clob => 'longtext',
18
19 #
20 # Sybase types
21 #
22 int => 'integer',
23 money => 'float',
24 real => 'double',
25 comment => 'text',
26 bit => 'tinyint',
27
28 #
29 # Access types
30 #
31 'long integer' => 'integer',
32 'text' => 'text',
33 'datetime' => 'datetime',
34
35 #
36 # PostgreSQL types
37 #
38 bytea => 'BLOB',
39 );
40
41 #
42 # Column types that do not support lenth attribute
43 #
44 my @no_length_attr = qw/ date time timestamp datetime year /;
45
46 method preprocess_schema($schema) {
47# my ($schema) = @_;
48
49 # extra->{mysql_table_type} used to be the type. It belongs in options, so
50 # move it if we find it. Return Engine type if found in extra or options
51 # Similarly for mysql_charset and mysql_collate
52 my $extra_to_options = sub {
53 my ($table, $extra_name, $opt_name) = @_;
54
55 my $extra = $table->extra;
56
57 my $extra_type = delete $extra->{$extra_name};
58
59 # Now just to find if there is already an Engine or Type option...
60 # and lets normalize it to ENGINE since:
61 #
62 # The ENGINE table option specifies the storage engine for the table.
63 # TYPE is a synonym, but ENGINE is the preferred option name.
64 #
65
66 # We have to use the hash directly here since otherwise there is no way
67 # to remove options.
68 my $options = ( $table->{options} ||= []);
69
70 # If multiple option names, normalize to the first one
71 if (ref $opt_name) {
72 OPT_NAME: for ( @$opt_name[1..$#$opt_name] ) {
73 for my $idx ( 0..$#{$options} ) {
74 my ($key, $value) = %{ $options->[$idx] };
75
76 if (uc $key eq $_) {
77 $options->[$idx] = { $opt_name->[0] => $value };
78 last OPT_NAME;
79 }
80 }
81 }
82 $opt_name = $opt_name->[0];
83
84 }
85
86
87 # This assumes that there isn't both a Type and an Engine option.
88 OPTION:
89 for my $idx ( 0..$#{$options} ) {
90 my ($key, $value) = %{ $options->[$idx] };
91
92 next unless uc $key eq $opt_name;
93
94 # make sure case is right on option name
95 delete $options->[$idx]{$key};
96 return $options->[$idx]{$opt_name} = $value || $extra_type;
97
98 }
99
100 if ($extra_type) {
101 push @$options, { $opt_name => $extra_type };
102 return $extra_type;
103 }
104
105 };
106
107 # Names are only specific to a given schema
108 my %used_names = ();
109
110 #
111 # Work out which tables need to be InnoDB to support foreign key
112 # constraints. We do this first as we need InnoDB at both ends.
113 #
114 foreach my $table ( $schema->get_tables ) {
115
116 $extra_to_options->($table, 'mysql_table_type', ['ENGINE', 'TYPE'] );
117 $extra_to_options->($table, 'mysql_charset', 'CHARACTER SET' );
118 $extra_to_options->($table, 'mysql_collate', 'COLLATE' );
119
120 foreach my $c ( $table->get_constraints ) {
121 next unless $c->type eq FOREIGN_KEY;
122
123 # Normalize constraint names here.
124 my $c_name = $c->name;
125 # Give the constraint a name if it doesn't have one, so it doens't feel
126 # left out
127 $c_name = $table->name . '_fk' unless length $c_name;
128
129 $c->name( $self->next_unused_name($c_name) );
130
131 for my $meth (qw/table reference_table/) {
132 my $table = $schema->get_table($c->$meth) || next;
133 # This normalizes the types to ENGINE and returns the value if its there
5590bc43 134 next if $extra_to_options->($table, 'mysql_table_type', ['ENGINE', 'TYPE']);
135# $table->options( [ { ENGINE => 'InnoDB' } ] );
24e6a53a 136 }
137 } # foreach constraints
138
139 my %map = ( mysql_collate => 'collate', mysql_charset => 'character set');
140 foreach my $f ( $table->get_fields ) {
141 my $extra = $f->extra;
142 for (keys %map) {
143 $extra->{$map{$_}} = delete $extra->{$_} if exists $extra->{$_};
144 }
145
146 my @size = $f->size;
147 if ( !$size[0] && $f->data_type =~ /char$/ ) {
148 $f->size( (255) );
149 }
150 }
151
152 }
153 }
154
94f42333 155 method produce {
24e6a53a 156 my $translator = $self->translator;
157 my $DEBUG = 0;# = $translator->debug;
158 #local %used_names;
159 my $no_comments = $translator->no_comments;
160 my $add_drop_table = $translator->add_drop_table;
161 my $schema = $translator->schema;
162 my $show_warnings = $translator->show_warnings || 0;
163 my $producer_args = $translator->producer_args;
f48e6f55 164 my $mysql_version = $translator->engine_version ($producer_args->{mysql_version}, 'perl') || 0;
24e6a53a 165 my $max_id_length = $producer_args->{mysql_max_id_length} || $DEFAULT_MAX_ID_LENGTH;
166
167 my ($qt, $qf, $qc) = ('','', '');
168 $qt = '`' if $translator->quote_table_names;
169 $qf = '`' if $translator->quote_field_names;
170
171 #debug("PKG: Beginning production\n");
172 %used_names = ();
173 my $create = '';
174 $create .= $self->header_comment unless ($no_comments);
175 # \todo Don't set if MySQL 3.x is set on command line
176 my @create = "SET foreign_key_checks=0";
177
178 $self->preprocess_schema($schema);
179
180 #
181 # Generate sql
182 #
183 my @table_defs =();
184
185 for my $table ( $schema->get_tables ) {
186 # print $table->name, "\n";
187 push @table_defs, $self->create_table($table,
188 { add_drop_table => $add_drop_table,
189 show_warnings => $show_warnings,
190 no_comments => $no_comments,
191 quote_table_names => $qt,
192 quote_field_names => $qf,
193 max_id_length => $max_id_length,
194 mysql_version => $mysql_version
195 });
196 }
197
198 if ($mysql_version >= 5.000001) {
199 for my $view ( $schema->get_views ) {
200 push @table_defs, $self->create_view($view,
201 { add_replace_view => $add_drop_table,
202 show_warnings => $show_warnings,
203 no_comments => $no_comments,
204 quote_table_names => $qt,
205 quote_field_names => $qf,
206 max_id_length => $max_id_length,
207 mysql_version => $mysql_version
208 });
209 }
210 }
7c0c8240 211
24e6a53a 212 push @table_defs, "SET foreign_key_checks=1";
24e6a53a 213 return wantarray ? ($create ? $create : (), @create, @table_defs) : ($create . join('', map { $_ ? "$_;\n\n" : () } (@create, @table_defs)));
214 }
215
216 method create_view($view, $options) {
24e6a53a 217 my $qt = $options->{quote_table_names} || '';
218 my $qf = $options->{quote_field_names} || '';
219
220 my $view_name = $view->name;
221 #debug("PKG: Looking at view '${view_name}'\n");
222
223 # Header. Should this look like what mysqldump produces?
224 my $create = '';
225 $create .= "--\n-- View: ${qt}${view_name}${qt}\n--\n" unless $options->{no_comments};
226 $create .= 'CREATE';
227 $create .= ' OR REPLACE' if $options->{add_replace_view};
228 $create .= "\n";
229
230 my $extra = $view->extra;
231 # ALGORITHM
232 if( exists($extra->{mysql_algorithm}) && defined(my $algorithm = $extra->{mysql_algorithm}) ){
233 $create .= " ALGORITHM = ${algorithm}\n" if $algorithm =~ /(?:UNDEFINED|MERGE|TEMPTABLE)/i;
234 }
235 # DEFINER
236 if( exists($extra->{mysql_definer}) && defined(my $user = $extra->{mysql_definer}) ){
237 $create .= " DEFINER = ${user}\n";
238 }
239 # SECURITY
240 if( exists($extra->{mysql_security}) && defined(my $security = $extra->{mysql_security}) ){
241 $create .= " SQL SECURITY ${security}\n" if $security =~ /(?:DEFINER|INVOKER)/i;
242 }
243
244 #Header, cont.
245 $create .= " VIEW ${qt}${view_name}${qt}";
246
247 if( my @fields = $view->fields ){
248 my $list = join ', ', map { "${qf}${_}${qf}"} @fields;
249 $create .= " ( ${list} )";
250 }
251 if( my $sql = $view->sql ){
252 $create .= " AS (\n ${sql}\n )";
253 }
24e6a53a 254 return $create;
255 }
256
257 method create_table($table, $options) {
24e6a53a 258 my $qt = $options->{quote_table_names} || '';
259 my $qf = $options->{quote_field_names} || '';
260
261 my $table_name = $self->quote_table_name($table->name, $qt);
262 #debug("PKG: Looking at table '$table_name'\n");
263
264 #
265 # Header. Should this look like what mysqldump produces?
266 #
267 my $create = '';
268 my $drop;
269 $create .= "--\n-- Table: $table_name\n--\n" unless $options->{no_comments};
270 $drop = qq[DROP TABLE IF EXISTS $table_name] if $options->{add_drop_table};
271 $create .= "CREATE TABLE $table_name (\n";
272
273 #
274 # Fields
275 #
276 my @field_defs;
277 for my $field ( $table->get_fields ) {
278 push @field_defs, $self->create_field($field, $options);
279 }
280
281 #
282 # Indices
283 #
284 my @index_defs;
285 my %indexed_fields;
286 for my $index ( $table->get_indices ) {
287 push @index_defs, $self->create_index($index, $options);
288 $indexed_fields{ $_ } = 1 for $index->fields;
289 }
290
291 #
292 # Constraints -- need to handle more than just FK. -ky
293 #
294 my @constraint_defs;
295 my @constraints = $table->get_constraints;
296 for my $c ( @constraints ) {
94f42333 297 my $constr = $self->create_constraint($c, $options);
298 push @constraint_defs, $constr if($constr); #use Data::Dumper; warn Dumper($c->columns) if $constr =~ /^CONSTRAINT/; # unless $c->fields;
24e6a53a 299 next unless $c->fields;
94f42333 300
24e6a53a 301 unless ( $indexed_fields{ ($c->fields())[0] } || $c->type ne FOREIGN_KEY ) {
302 push @index_defs, "INDEX ($qf" . ($c->fields())[0] . "$qf)";
303 $indexed_fields{ ($c->fields())[0] } = 1;
304 }
305 }
94f42333 306
24e6a53a 307 $create .= join(",\n", map { " $_" }
308 @field_defs, @index_defs, @constraint_defs
309 );
94f42333 310
24e6a53a 311 #
312 # Footer
313 #
314 $create .= "\n)";
315 $create .= $self->generate_table_options($table, $options) || '';
316 # $create .= ";\n\n";
317
318 return $drop ? ($drop,$create) : $create;
319 }
320
321 method quote_table_name(Str $table_name, Str $qt) {
322 $table_name =~ s/\./$qt.$qt/g;
323
324 return "$qt$table_name$qt";
325 }
326
327 method generate_table_options(Table $table, $options?) {
328 my $create;
329
330 my $table_type_defined = 0;
331 my $qf = $options->{quote_field_names} ||= '';
332 my $charset = $table->extra->{'mysql_charset'};
333 my $collate = $table->extra->{'mysql_collate'};
334 my $union = undef;
94f42333 335
5590bc43 336 for my $t1_option_ref ($table->options) {
24e6a53a 337 my($key, $value) = %{$t1_option_ref};
338 $table_type_defined = 1
339 if uc $key eq 'ENGINE' or uc $key eq 'TYPE';
340 if (uc $key eq 'CHARACTER SET') {
341 $charset = $value;
342 next;
343 } elsif (uc $key eq 'COLLATE') {
344 $collate = $value;
345 next;
346 } elsif (uc $key eq 'UNION') {
347 $union = "($qf". join("$qf, $qf", @$value) ."$qf)";
348 next;
349 }
350 $create .= " $key=$value";
351 }
352
353 my $mysql_table_type = $table->extra->{'mysql_table_type'};
354 $create .= " ENGINE=$mysql_table_type"
355 if $mysql_table_type && !$table_type_defined;
356 my $comments = $table->comments;
357
358 $create .= " DEFAULT CHARACTER SET $charset" if $charset;
359 $create .= " COLLATE $collate" if $collate;
360 $create .= " UNION=$union" if $union;
361 $create .= qq[ comment='$comments'] if $comments;
362 return $create;
363 }
364
365 method create_field($field, $options?) {
366 my $qf = $options->{quote_field_names} ||= '';
367
368 my $field_name = $field->name;
369 #debug("PKG: Looking at field '$field_name'\n");
370 my $field_def = "$qf$field_name$qf";
371
372 # data type and size
373 my $data_type = $field->data_type;
374 my @size = $field->size;
375 my %extra = $field->extra;
376 my $list = $extra{'list'} || [];
377 # \todo deal with embedded quotes
378 my $commalist = join( ', ', map { qq['$_'] } @$list );
379 my $charset = $extra{'mysql_charset'};
380 my $collate = $extra{'mysql_collate'};
381
382 my $mysql_version = $options->{mysql_version} || 0;
383 #
384 # Oracle "number" type -- figure best MySQL type
385 #
386 if ( lc $data_type eq 'number' ) {
387 # not an integer
388 if ( scalar @size > 1 ) {
389 $data_type = 'double';
390 }
391 elsif ( $size[0] && $size[0] >= 12 ) {
392 $data_type = 'bigint';
393 }
394 elsif ( $size[0] && $size[0] <= 1 ) {
395 $data_type = 'tinyint';
396 }
397 else {
398 $data_type = 'int';
399 }
400 }
401 #
402 # Convert a large Oracle varchar to "text"
403 # (not necessary as of 5.0.3 http://dev.mysql.com/doc/refman/5.0/en/char.html)
404 #
405 elsif ( $data_type =~ /char/i && $size[0] > 255 ) {
406 unless ($size[0] <= 65535 && $mysql_version >= 5.000003 ) {
407 $data_type = 'text';
408 @size = ();
409 }
410 }
411 elsif ( $data_type =~ /boolean/i ) {
412 if ($mysql_version >= 4) {
413 $data_type = 'boolean';
414 } else {
415 $data_type = 'enum';
416 $commalist = "'0','1'";
417 }
418 }
419# elsif ( exists $translate{ lc $data_type } ) {
420# $data_type = $translate{ lc $data_type };
421# }
422
423 @size = () if $data_type =~ /(text|blob)/i;
424
425 if ( $data_type =~ /(double|float)/ && scalar @size == 1 ) {
426 push @size, '0';
427 }
428
429 $field_def .= " $data_type";
430
431 if ( lc($data_type) eq 'enum' || lc($data_type) eq 'set') {
432 $field_def .= '(' . $commalist . ')';
433 }
434 elsif (
435 defined $size[0] && $size[0] > 0
436 &&
437 ! grep lc($data_type) eq $_, @no_length_attr
438 ) {
439 $field_def .= '(' . join( ', ', @size ) . ')';
440 }
441
442 # char sets
443 $field_def .= " CHARACTER SET $charset" if $charset;
444 $field_def .= " COLLATE $collate" if $collate;
445
446 # MySQL qualifiers
447 for my $qual ( qw[ binary unsigned zerofill ] ) {
448 my $val = $extra{ $qual } || $extra{ uc $qual } or next;
449 $field_def .= " $qual";
450 }
451 for my $qual ( 'character set', 'collate', 'on update' ) {
452 my $val = $extra{ $qual } || $extra{ uc $qual } or next;
453 $field_def .= " $qual $val";
454 }
455
456 # Null?
457 $field_def .= ' NOT NULL' unless $field->is_nullable;
458
459 # Default? XXX Need better quoting!
460 my $default = $field->default_value;
e20b43c1 461
462# if ( defined $default ) {
463# SQL::Translator::Producer->_apply_default_value(
464# \$field_def,
465# $default,
466# [
467# 'NULL' => \'NULL',
468# ],
469# );
470# }
24e6a53a 471
472 if ( my $comments = $field->comments ) {
473 $field_def .= qq[ comment '$comments'];
474 }
475
476 # auto_increment?
477 $field_def .= " auto_increment" if $field->is_auto_increment;
478
479 return $field_def;
480 }
481
482 method alter_create_index(Index $index, $options?) {
483 my $qt = $options->{quote_table_names} || '';
484 my $qf = $options->{quote_field_names} || '';
485
486 return join( ' ',
487 'ALTER TABLE',
488 $qt.$index->table->name.$qt,
489 'ADD',
490 create_index(@_)
491 );
492 }
493
494 method create_index($index, $options?) {
495# my ( $index, $options ) = @_;
496
497 my $qf = $options->{quote_field_names} || '';
498
499 return join(
500 ' ',
501 map { $_ || () }
502 lc $index->type eq 'normal' ? 'INDEX' : $index->type . ' INDEX',
503 $index->name
504 ? (
505 $self->truncate_id_uniquely(
506 $index->name,
507 $options->{max_id_length} || $DEFAULT_MAX_ID_LENGTH
508 )
509 )
510 : '',
511 '(' . $qf . join( "$qf, $qf", $index->fields ) . $qf . ')'
512 );
513 }
514
515 method alter_drop_index(Index $index, $options?) {
516 my $qt = $options->{quote_table_names} || '';
517 my $qf = $options->{quote_field_names} || '';
518
519 return join( ' ',
520 'ALTER TABLE',
521 $qt.$index->table->name.$qt,
522 'DROP',
523 'INDEX',
524 $index->name || $index->fields
525 );
526
527 }
528
529 method alter_drop_constraint(Constraint $c, $options?) {
530 my $qt = $options->{quote_table_names} || '';
531 my $qc = $options->{quote_field_names} || '';
532
533 my $out = sprintf('ALTER TABLE %s DROP %s %s',
534 $qt . $c->table->name . $qt,
535 $c->type eq FOREIGN_KEY ? $c->type : "INDEX",
536 $qc . $c->name . $qc );
537
538 return $out;
539 }
540
541 method alter_create_constraint($index, $options?) {
542 my $qt = $options->{quote_table_names} || '';
543 return join( ' ',
544 'ALTER TABLE',
545 $qt.$index->table->name.$qt,
546 'ADD',
547 $self->create_constraint(@_) );
548 }
549
550 method create_constraint(Constraint $c, $options?) {
551 my $qf = $options->{quote_field_names} || '';
552 my $qt = $options->{quote_table_names} || '';
553 my $leave_name = $options->{leave_name} || undef;
554
555 my @fields = $c->fields or return;
556
557 if ( $c->type eq PRIMARY_KEY ) {
558 return 'PRIMARY KEY (' . $qf . join("$qf, $qf", @fields). $qf . ')';
559 }
560 elsif ( $c->type eq UNIQUE ) {
561 return
562 'UNIQUE '.
563 (defined $c->name ? $qf.$self->truncate_id_uniquely( $c->name, $options->{max_id_length} || $DEFAULT_MAX_ID_LENGTH ).$qf.' ' : '').
564 '(' . $qf . join("$qf, $qf", @fields). $qf . ')';
565 }
566 elsif ( $c->type eq FOREIGN_KEY ) {
567 #
568 # Make sure FK field is indexed or MySQL complains.
569 #
24e6a53a 570 my $table = $c->table;
571 my $c_name = $self->truncate_id_uniquely( $c->name, $options->{max_id_length} || $DEFAULT_MAX_ID_LENGTH );
572
573 my $def = join(' ',
574 map { $_ || () }
575 'CONSTRAINT',
576 $qf . $c_name . $qf,
577 'FOREIGN KEY'
578 );
579
580
581 $def .= ' ('.$qf . join( "$qf, $qf", @fields ) . $qf . ')';
94f42333 582
24e6a53a 583 $def .= ' REFERENCES ' . $qt . $c->reference_table . $qt;
24e6a53a 584 my @rfields = map { $_ || () } $c->reference_fields;
94f42333 585
24e6a53a 586 unless ( @rfields ) {
587 my $rtable_name = $c->reference_table;
588 if ( my $ref_table = $table->schema->get_table( $rtable_name ) ) {
589 push @rfields, $ref_table->primary_key;
590 }
591 else {
592 warn "Can't find reference table '$rtable_name' " .
593 "in schema\n" if $options->{show_warnings};
594 }
595 }
596
597 if ( @rfields ) {
598 $def .= ' (' . $qf . join( "$qf, $qf", @rfields ) . $qf . ')';
599 }
600 else {
601 warn "FK constraint on " . $table->name . '.' .
602 join('', @fields) . " has no reference fields\n"
603 if $options->{show_warnings};
604 }
605
606 if ( $c->match_type ) {
94f42333 607 $def .= ' MATCH ';
608 $def .= ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
24e6a53a 609 }
94f42333 610# if ( $c->on_delete ) {
611# $def .= ' ON DELETE '.join( ' ', $c->on_delete );
612# }
24e6a53a 613
94f42333 614# if ( $c->on_update ) {
615# $def .= ' ON UPDATE '.join( ' ', $c->on_update );
616# }
24e6a53a 617 return $def;
618 }
619
620 return undef;
621 }
622
623 method alter_table(Str $to_table, $options?) {
624 my $qt = $options->{quote_table_names} || '';
625
626 my $table_options = $self->generate_table_options($to_table, $options) || '';
627 my $out = sprintf('ALTER TABLE %s%s',
628 $qt . $to_table->name . $qt,
629 $table_options);
630
631 return $out;
632 }
633
634 method rename_field(@args) { alter_field(@args) }
635 method alter_field(Str $from_field, Str $to_field, $options?) {
636 my $qf = $options->{quote_field_names} || '';
637 my $qt = $options->{quote_table_names} || '';
638
639 my $out = sprintf('ALTER TABLE %s CHANGE COLUMN %s %s',
640 $qt . $to_field->table->name . $qt,
641 $qf . $from_field->name . $qf,
642 $self->create_field($to_field, $options));
643
644 return $out;
645 }
646
647 method add_field(Str $new_field, $options?) {
648 my $qt = $options->{quote_table_names} || '';
649
650 my $out = sprintf('ALTER TABLE %s ADD COLUMN %s',
651 $qt . $new_field->table->name . $qt,
652 create_field($new_field, $options));
653
654 return $out;
655
656 }
657
658 method drop_field(Str $old_field, $options?) {
659 my $qf = $options->{quote_field_names} || '';
660 my $qt = $options->{quote_table_names} || '';
661
662 my $out = sprintf('ALTER TABLE %s DROP COLUMN %s',
663 $qt . $old_field->table->name . $qt,
664 $qf . $old_field->name . $qf);
665
666 return $out;
667
668 }
669
670 method batch_alter_table($table, $diff_hash, $options?) {
671 # InnoDB has an issue with dropping and re-adding a FK constraint under the
672 # name in a single alter statment, see: http://bugs.mysql.com/bug.php?id=13741
673 #
674 # We have to work round this.
675
676 my %fks_to_alter;
677 my %fks_to_drop = map {
678 $_->type eq FOREIGN_KEY
679 ? ( $_->name => $_ )
680 : ( )
681 } @{$diff_hash->{alter_drop_constraint} };
682
683 my %fks_to_create = map {
684 if ( $_->type eq FOREIGN_KEY) {
685 $fks_to_alter{$_->name} = $fks_to_drop{$_->name} if $fks_to_drop{$_->name};
686 ( $_->name => $_ );
687 } else { ( ) }
688 } @{$diff_hash->{alter_create_constraint} };
689
690 my @drop_stmt;
691 if (scalar keys %fks_to_alter) {
692 $diff_hash->{alter_drop_constraint} = [
693 grep { !$fks_to_alter{$_->name} } @{ $diff_hash->{alter_drop_constraint} }
694 ];
695
696 @drop_stmt = batch_alter_table($table, { alter_drop_constraint => [ values %fks_to_alter ] }, $options);
697
698 }
699
700 my @stmts = map {
701 if (@{ $diff_hash->{$_} || [] }) {
702 my $meth = __PACKAGE__->can($_) or die __PACKAGE__ . " cant $_";
703 map { $meth->( (ref $_ eq 'ARRAY' ? @$_ : $_), $options ) } @{ $diff_hash->{$_} }
704 } else { () }
705 } qw/rename_table
706 alter_drop_constraint
707 alter_drop_index
708 drop_field
709 add_field
710 alter_field
711 rename_field
712 alter_create_index
713 alter_create_constraint
714 alter_table/;
715
716 # rename_table makes things a bit more complex
717 my $renamed_from = "";
718 $renamed_from = $diff_hash->{rename_table}[0][0]->name
719 if $diff_hash->{rename_table} && @{$diff_hash->{rename_table}};
720
721 return unless @stmts;
722 # Just zero or one stmts. return now
723 return (@drop_stmt,@stmts) unless @stmts > 1;
724
725 # Now strip off the 'ALTER TABLE xyz' of all but the first one
726
727 my $qt = $options->{quote_table_names} || '';
728 my $table_name = $qt . $table->name . $qt;
729
730
731 my $re = $renamed_from
732 ? qr/^ALTER TABLE (?:\Q$table_name\E|\Q$qt$renamed_from$qt\E) /
733 : qr/^ALTER TABLE \Q$table_name\E /;
734
735 my $first = shift @stmts;
736 my ($alter_table) = $first =~ /($re)/;
737
738 my $padd = " " x length($alter_table);
739
740 return @drop_stmt, join( ",\n", $first, map { s/$re//; $padd . $_ } @stmts);
741
742 }
743
744 method drop_table(Str $table, $options?) {
745 my $qt = $options->{quote_table_names} || '';
746
747 # Drop (foreign key) constraints so table drops cleanly
748 my @sql = batch_alter_table($table, { alter_drop_constraint => [ grep { $_->type eq 'FOREIGN KEY' } $table->get_constraints ] }, $options);
749
750 return (@sql, "DROP TABLE $qt$table$qt");
751 # return join("\n", @sql, "DROP TABLE $qt$table$qt");
752
753 }
754
755 method rename_table(Str $old_table, Str $new_table, $options?) {
756 my $qt = $options->{quote_table_names} || '';
757
758 return "ALTER TABLE $qt$old_table$qt RENAME TO $qt$new_table$qt";
759 }
760
761 method next_unused_name($name?) {
762# my $name = shift || '';
763 if ( !defined($used_names{$name}) ) {
764 $used_names{$name} = $name;
765 return $name;
766 }
767
768 my $i = 1;
769 while ( defined($used_names{$name . '_' . $i}) ) {
770 ++$i;
771 }
772 $name .= '_' . $i;
773 $used_names{$name} = $name;
774 return $name;
775 }
776
777 method header_comment($producer?, $comment_char?) {
778 $producer ||= caller;
779 my $now = scalar localtime;
780 my $DEFAULT_COMMENT = '-- ';
781
782 $comment_char = $DEFAULT_COMMENT
783 unless defined $comment_char;
784
785 my $header_comment =<<"HEADER_COMMENT";
786 ${comment_char}
787 ${comment_char}Created by $producer
788 ${comment_char}Created on $now
789 ${comment_char}
790HEADER_COMMENT
791
792 # Any additional stuff passed in
793 for my $additional_comment (@_) {
794 $header_comment .= "${comment_char}${additional_comment}\n";
795 }
796
797 return $header_comment;
798 }
799
f48e6f55 800 use constant COLLISION_TAG_LENGTH => 8;
24e6a53a 801
f48e6f55 802 method truncate_id_uniquely(Str $desired_name, Int $max_symbol_length) {
f77b076a 803 use Digest::SHA1 qw(sha1_hex);
f48e6f55 804 return $desired_name
805 unless defined $desired_name && length $desired_name > $max_symbol_length;
24e6a53a 806
f48e6f55 807 my $truncated_name = substr $desired_name, 0,
808 $max_symbol_length - COLLISION_TAG_LENGTH - 1;
24e6a53a 809
f48e6f55 810 # Hex isn't the most space-efficient, but it skirts around allowed
811 # charset issues
812 my $digest = sha1_hex($desired_name);
813 my $collision_tag = substr $digest, 0, COLLISION_TAG_LENGTH;
24e6a53a 814
f48e6f55 815 return $truncated_name
816 . '_'
817 . $collision_tag;
24e6a53a 818 }
24e6a53a 819}
SQL::Translator (GSOC work)