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9398955f |
1 | package SQL::Translator::Producer::MySQL; |
2 | |
49e1eb70 |
3 | # ------------------------------------------------------------------- |
866d012e |
4 | # $Id: MySQL.pm,v 1.54 2007-11-10 03:36:43 mwz444 Exp $ |
49e1eb70 |
5 | # ------------------------------------------------------------------- |
977651a5 |
6 | # Copyright (C) 2002-4 SQLFairy Authors |
9398955f |
7 | # |
8 | # This program is free software; you can redistribute it and/or |
9 | # modify it under the terms of the GNU General Public License as |
10 | # published by the Free Software Foundation; version 2. |
11 | # |
12 | # This program is distributed in the hope that it will be useful, but |
13 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | # General Public License for more details. |
16 | # |
17 | # You should have received a copy of the GNU General Public License |
18 | # along with this program; if not, write to the Free Software |
19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
20 | # 02111-1307 USA |
21 | # ------------------------------------------------------------------- |
22 | |
c855a748 |
23 | =head1 NAME |
24 | |
25 | SQL::Translator::Producer::MySQL - MySQL-specific producer for SQL::Translator |
26 | |
27 | =head1 SYNOPSIS |
28 | |
29 | Use via SQL::Translator: |
30 | |
31 | use SQL::Translator; |
32 | |
33 | my $t = SQL::Translator->new( parser => '...', producer => 'MySQL', '...' ); |
34 | $t->translate; |
35 | |
36 | =head1 DESCRIPTION |
37 | |
38 | This module will produce text output of the schema suitable for MySQL. |
39 | There are still some issues to be worked out with syntax differences |
40 | between MySQL versions 3 and 4 ("SET foreign_key_checks," character sets |
41 | for fields, etc.). |
42 | |
5a0c7b43 |
43 | =head2 Table Types |
44 | |
45 | Normally the tables will be created without any explicit table type given and |
46 | so will use the MySQL default. |
47 | |
48 | Any tables involved in foreign key constraints automatically get a table type |
49 | of InnoDB, unless this is overridden by setting the C<mysql_table_type> extra |
50 | attribute explicitly on the table. |
51 | |
52 | =head2 Extra attributes. |
53 | |
54 | The producer recognises the following extra attributes on the Schema objects. |
55 | |
56 | =over 4 |
57 | |
7467c458 |
58 | =item B<field.list> |
5a0c7b43 |
59 | |
60 | Set the list of allowed values for Enum fields. |
61 | |
7467c458 |
62 | =item B<field.binary>, B<field.unsigned>, B<field.zerofill> |
5a0c7b43 |
63 | |
64 | Set the MySQL field options of the same name. |
65 | |
7467c458 |
66 | =item B<field.renamed_from>, B<table.renamed_from> |
4d438549 |
67 | |
7467c458 |
68 | Use when producing diffs to indicate that the current table/field has been |
69 | renamed from the old name as given in the attribute value. |
4d438549 |
70 | |
7467c458 |
71 | =item B<table.mysql_table_type> |
5a0c7b43 |
72 | |
73 | Set the type of the table e.g. 'InnoDB', 'MyISAM'. This will be |
74 | automatically set for tables involved in foreign key constraints if it is |
75 | not already set explicitly. See L<"Table Types">. |
76 | |
7467c458 |
77 | Please note that the C<ENGINE> option is the prefered method of specifying |
78 | the MySQL storage engine to use, but this method still works for backwards |
79 | compatability. |
80 | |
81 | =item B<table.mysql_charset>, B<table.mysql_collate> |
1ded8513 |
82 | |
83 | Set the tables default charater set and collation order. |
84 | |
7467c458 |
85 | =item B<field.mysql_charset>, B<field.mysql_collate> |
1ded8513 |
86 | |
87 | Set the fields charater set and collation order. |
88 | |
5a0c7b43 |
89 | =back |
90 | |
c855a748 |
91 | =cut |
92 | |
9398955f |
93 | use strict; |
cd0ea0fd |
94 | use warnings; |
da5a1bae |
95 | use vars qw[ $VERSION $DEBUG %used_names ]; |
866d012e |
96 | $VERSION = sprintf "%d.%02d", q$Revision: 1.54 $ =~ /(\d+)\.(\d+)/; |
5636ed00 |
97 | $DEBUG = 0 unless defined $DEBUG; |
9398955f |
98 | |
99 | use Data::Dumper; |
1c14e9f1 |
100 | use SQL::Translator::Schema::Constants; |
5ee19df8 |
101 | use SQL::Translator::Utils qw(debug header_comment); |
9398955f |
102 | |
d2344c83 |
103 | # |
104 | # Use only lowercase for the keys (e.g. "long" and not "LONG") |
105 | # |
2620fc1c |
106 | my %translate = ( |
107 | # |
108 | # Oracle types |
109 | # |
110 | varchar2 => 'varchar', |
111 | long => 'text', |
d2344c83 |
112 | clob => 'longtext', |
2620fc1c |
113 | |
114 | # |
115 | # Sybase types |
116 | # |
117 | int => 'integer', |
118 | money => 'float', |
119 | real => 'double', |
120 | comment => 'text', |
121 | bit => 'tinyint', |
87779799 |
122 | |
123 | # |
124 | # Access types |
125 | # |
126 | 'long integer' => 'integer', |
127 | 'text' => 'text', |
128 | 'datetime' => 'datetime', |
2620fc1c |
129 | ); |
130 | |
9ab59f87 |
131 | |
132 | sub preprocess_schema { |
934e1b39 |
133 | my ($schema) = @_; |
9ab59f87 |
134 | |
135 | # extra->{mysql_table_type} used to be the type. It belongs in options, so |
136 | # move it if we find it. Return Engine type if found in extra or options |
7725e1e6 |
137 | # Similarly for mysql_charset and mysql_collate |
138 | my $extra_to_options = sub { |
139 | my ($table, $extra_name, $opt_name) = @_; |
9ab59f87 |
140 | |
141 | my $extra = $table->extra; |
142 | |
7725e1e6 |
143 | my $extra_type = delete $extra->{$extra_name}; |
9ab59f87 |
144 | |
145 | # Now just to find if there is already an Engine or Type option... |
146 | # and lets normalize it to ENGINE since: |
147 | # |
148 | # The ENGINE table option specifies the storage engine for the table. |
149 | # TYPE is a synonym, but ENGINE is the preferred option name. |
150 | # |
151 | |
152 | # We have to use the hash directly here since otherwise there is no way |
153 | # to remove options. |
154 | my $options = ( $table->{options} ||= []); |
155 | |
7725e1e6 |
156 | # If multiple option names, normalize to the first one |
157 | if (ref $opt_name) { |
158 | OPT_NAME: for ( @$opt_name[1..$#$opt_name] ) { |
159 | for my $idx ( 0..$#{$options} ) { |
160 | my ($key, $value) = %{ $options->[$idx] }; |
161 | |
162 | if (uc $key eq $_) { |
163 | $options->[$idx] = { $opt_name->[0] => $value }; |
164 | last OPT_NAME; |
165 | } |
166 | } |
167 | } |
168 | $opt_name = $opt_name->[0]; |
169 | |
170 | } |
171 | |
172 | |
9ab59f87 |
173 | # This assumes that there isn't both a Type and an Engine option. |
7725e1e6 |
174 | OPTION: |
9ab59f87 |
175 | for my $idx ( 0..$#{$options} ) { |
176 | my ($key, $value) = %{ $options->[$idx] }; |
177 | |
7725e1e6 |
178 | next unless uc $key eq $opt_name; |
179 | |
180 | # make sure case is right on option name |
9ab59f87 |
181 | delete $options->[$idx]{$key}; |
7725e1e6 |
182 | return $options->[$idx]{$opt_name} = $value || $extra_type; |
9ab59f87 |
183 | |
184 | } |
185 | |
186 | if ($extra_type) { |
7725e1e6 |
187 | push @$options, { $opt_name => $extra_type }; |
9ab59f87 |
188 | return $extra_type; |
189 | } |
190 | |
191 | }; |
192 | |
1c680eb9 |
193 | # Names are only specific to a given schema |
194 | local %used_names = (); |
195 | |
9ab59f87 |
196 | # |
197 | # Work out which tables need to be InnoDB to support foreign key |
198 | # constraints. We do this first as we need InnoDB at both ends. |
199 | # |
200 | foreach my $table ( $schema->get_tables ) { |
7725e1e6 |
201 | |
202 | $extra_to_options->($table, 'mysql_table_type', ['ENGINE', 'TYPE'] ); |
203 | $extra_to_options->($table, 'mysql_charset', 'CHARACTER SET' ); |
204 | $extra_to_options->($table, 'mysql_collate', 'COLLATE' ); |
9ab59f87 |
205 | |
929ef265 |
206 | foreach my $c ( $table->get_constraints ) { |
1c680eb9 |
207 | next unless $c->type eq FOREIGN_KEY; |
208 | |
209 | # Normalize constraint names here. |
210 | my $c_name = $c->name; |
211 | # Give the constraint a name if it doesn't have one, so it doens't feel |
212 | # left out |
213 | $c_name = $table->name . '_fk' unless length $c_name; |
214 | |
215 | $c->name( next_unused_name($c_name) ); |
216 | |
9ab59f87 |
217 | for my $meth (qw/table reference_table/) { |
1c680eb9 |
218 | my $table = $schema->get_table($c->$meth) || next; |
7725e1e6 |
219 | # This normalizes the types to ENGINE and returns the value if its there |
220 | next if $extra_to_options->($table, 'mysql_table_type', ['ENGINE', 'TYPE']); |
9ab59f87 |
221 | $table->options( { 'ENGINE' => 'InnoDB' } ); |
222 | } |
929ef265 |
223 | } # foreach constraints |
224 | |
225 | foreach my $f ( $table->get_fields ) { |
226 | my @size = $f->size; |
227 | if ( !$size[0] && $f->data_type =~ /char$/ ) { |
228 | $f->size( (255) ); |
229 | } |
9ab59f87 |
230 | } |
929ef265 |
231 | |
9ab59f87 |
232 | } |
233 | } |
234 | |
9398955f |
235 | sub produce { |
a1d94525 |
236 | my $translator = shift; |
237 | local $DEBUG = $translator->debug; |
da5a1bae |
238 | local %used_names; |
a1d94525 |
239 | my $no_comments = $translator->no_comments; |
240 | my $add_drop_table = $translator->add_drop_table; |
241 | my $schema = $translator->schema; |
2bc23e82 |
242 | my $show_warnings = $translator->show_warnings || 0; |
d529894e |
243 | |
7725e1e6 |
244 | my ($qt, $qf, $qc) = ('','', ''); |
fe0f47d0 |
245 | $qt = '`' if $translator->quote_table_names; |
246 | $qf = '`' if $translator->quote_field_names; |
247 | |
1a24938d |
248 | debug("PKG: Beginning production\n"); |
da5a1bae |
249 | %used_names = (); |
d529894e |
250 | my $create; |
5ee19df8 |
251 | $create .= header_comment unless ($no_comments); |
0823773d |
252 | # \todo Don't set if MySQL 3.x is set on command line |
da147d03 |
253 | $create .= "SET foreign_key_checks=0;\n\n"; |
9398955f |
254 | |
934e1b39 |
255 | preprocess_schema($schema); |
5a0c7b43 |
256 | |
257 | # |
258 | # Generate sql |
259 | # |
cd0ea0fd |
260 | my @table_defs =(); |
4d438549 |
261 | |
1c14e9f1 |
262 | for my $table ( $schema->get_tables ) { |
cd0ea0fd |
263 | # print $table->name, "\n"; |
0013ee25 |
264 | push @table_defs, create_table($table, |
fe0f47d0 |
265 | { add_drop_table => $add_drop_table, |
266 | show_warnings => $show_warnings, |
267 | no_comments => $no_comments, |
268 | quote_table_names => $qt, |
269 | quote_field_names => $qf |
0013ee25 |
270 | }); |
271 | } |
9398955f |
272 | |
cd0ea0fd |
273 | # print "@table_defs\n"; |
fa94b25f |
274 | push @table_defs, "SET foreign_key_checks=1;\n\n"; |
cd0ea0fd |
275 | |
fa94b25f |
276 | return wantarray ? ($create, @table_defs) : $create . join ('', @table_defs); |
0013ee25 |
277 | } |
9398955f |
278 | |
0013ee25 |
279 | sub create_table |
280 | { |
281 | my ($table, $options) = @_; |
2620fc1c |
282 | |
fe0f47d0 |
283 | my $qt = $options->{quote_table_names} || ''; |
284 | my $qf = $options->{quote_field_names} || ''; |
285 | |
0013ee25 |
286 | my $table_name = $table->name; |
287 | debug("PKG: Looking at table '$table_name'\n"); |
6d3f6379 |
288 | |
0013ee25 |
289 | # |
290 | # Header. Should this look like what mysqldump produces? |
291 | # |
cd0ea0fd |
292 | my $create = ''; |
fa94b25f |
293 | my $drop; |
fe0f47d0 |
294 | $create .= "--\n-- Table: $qt$table_name$qt\n--\n" unless $options->{no_comments}; |
fa94b25f |
295 | $drop = qq[DROP TABLE IF EXISTS $qt$table_name$qt;\n] if $options->{add_drop_table}; |
fe0f47d0 |
296 | $create .= "CREATE TABLE $qt$table_name$qt (\n"; |
2b695517 |
297 | |
0013ee25 |
298 | # |
299 | # Fields |
300 | # |
301 | my @field_defs; |
302 | for my $field ( $table->get_fields ) { |
fe0f47d0 |
303 | push @field_defs, create_field($field, $options); |
0013ee25 |
304 | } |
1ded8513 |
305 | |
0013ee25 |
306 | # |
307 | # Indices |
308 | # |
309 | my @index_defs; |
310 | my %indexed_fields; |
311 | for my $index ( $table->get_indices ) { |
fe0f47d0 |
312 | push @index_defs, create_index($index, $options); |
0013ee25 |
313 | $indexed_fields{ $_ } = 1 for $index->fields; |
314 | } |
d529894e |
315 | |
0013ee25 |
316 | # |
317 | # Constraints -- need to handle more than just FK. -ky |
318 | # |
319 | my @constraint_defs; |
320 | my @constraints = $table->get_constraints; |
321 | for my $c ( @constraints ) { |
cd0ea0fd |
322 | my $constr = create_constraint($c, $options); |
323 | push @constraint_defs, $constr if($constr); |
0013ee25 |
324 | |
da5a1bae |
325 | unless ( $indexed_fields{ ($c->fields())[0] } || $c->type ne FOREIGN_KEY ) { |
326 | push @index_defs, "INDEX ($qf" . ($c->fields())[0] . "$qf)"; |
327 | $indexed_fields{ ($c->fields())[0] } = 1; |
328 | } |
0013ee25 |
329 | } |
1ded8513 |
330 | |
0013ee25 |
331 | $create .= join(",\n", map { " $_" } |
332 | @field_defs, @index_defs, @constraint_defs |
333 | ); |
9398955f |
334 | |
0013ee25 |
335 | # |
336 | # Footer |
337 | # |
338 | $create .= "\n)"; |
da5a1bae |
339 | $create .= generate_table_options($table) || ''; |
0013ee25 |
340 | $create .= ";\n\n"; |
9398955f |
341 | |
fa94b25f |
342 | return $drop ? ($drop,$create) : $create; |
0013ee25 |
343 | } |
f8b6e804 |
344 | |
da5a1bae |
345 | sub generate_table_options |
346 | { |
347 | my ($table) = @_; |
348 | my $create; |
349 | |
350 | my $table_type_defined = 0; |
7725e1e6 |
351 | my $charset = $table->extra('mysql_charset'); |
352 | my $collate = $table->extra('mysql_collate'); |
da5a1bae |
353 | for my $t1_option_ref ( $table->options ) { |
354 | my($key, $value) = %{$t1_option_ref}; |
355 | $table_type_defined = 1 |
356 | if uc $key eq 'ENGINE' or uc $key eq 'TYPE'; |
7725e1e6 |
357 | if (uc $key eq 'CHARACTER SET') { |
358 | $charset = $value; |
359 | next; |
360 | } elsif (uc $key eq 'COLLATE') { |
361 | $collate = $value; |
362 | next; |
363 | } |
da5a1bae |
364 | $create .= " $key=$value"; |
365 | } |
9ab59f87 |
366 | |
da5a1bae |
367 | my $mysql_table_type = $table->extra('mysql_table_type'); |
9ab59f87 |
368 | $create .= " ENGINE=$mysql_table_type" |
da5a1bae |
369 | if $mysql_table_type && !$table_type_defined; |
da5a1bae |
370 | my $comments = $table->comments; |
371 | |
372 | $create .= " DEFAULT CHARACTER SET $charset" if $charset; |
373 | $create .= " COLLATE $collate" if $collate; |
374 | $create .= qq[ comment='$comments'] if $comments; |
375 | return $create; |
376 | } |
377 | |
0013ee25 |
378 | sub create_field |
379 | { |
fe0f47d0 |
380 | my ($field, $options) = @_; |
381 | |
382 | my $qf = $options->{quote_field_names} ||= ''; |
9398955f |
383 | |
0013ee25 |
384 | my $field_name = $field->name; |
385 | debug("PKG: Looking at field '$field_name'\n"); |
fe0f47d0 |
386 | my $field_def = "$qf$field_name$qf"; |
0013ee25 |
387 | |
388 | # data type and size |
389 | my $data_type = $field->data_type; |
390 | my @size = $field->size; |
391 | my %extra = $field->extra; |
392 | my $list = $extra{'list'} || []; |
393 | # \todo deal with embedded quotes |
394 | my $commalist = join( ', ', map { qq['$_'] } @$list ); |
395 | my $charset = $extra{'mysql_charset'}; |
396 | my $collate = $extra{'mysql_collate'}; |
397 | |
398 | # |
399 | # Oracle "number" type -- figure best MySQL type |
400 | # |
401 | if ( lc $data_type eq 'number' ) { |
402 | # not an integer |
403 | if ( scalar @size > 1 ) { |
404 | $data_type = 'double'; |
d529894e |
405 | } |
0013ee25 |
406 | elsif ( $size[0] && $size[0] >= 12 ) { |
407 | $data_type = 'bigint'; |
408 | } |
409 | elsif ( $size[0] && $size[0] <= 1 ) { |
410 | $data_type = 'tinyint'; |
411 | } |
412 | else { |
413 | $data_type = 'int'; |
414 | } |
415 | } |
416 | # |
417 | # Convert a large Oracle varchar to "text" |
418 | # |
419 | elsif ( $data_type =~ /char/i && $size[0] > 255 ) { |
420 | $data_type = 'text'; |
421 | @size = (); |
422 | } |
0013ee25 |
423 | elsif ( $data_type =~ /boolean/i ) { |
424 | $data_type = 'enum'; |
425 | $commalist = "'0','1'"; |
426 | } |
427 | elsif ( exists $translate{ lc $data_type } ) { |
428 | $data_type = $translate{ lc $data_type }; |
429 | } |
430 | |
431 | @size = () if $data_type =~ /(text|blob)/i; |
432 | |
433 | if ( $data_type =~ /(double|float)/ && scalar @size == 1 ) { |
434 | push @size, '0'; |
435 | } |
d529894e |
436 | |
0013ee25 |
437 | $field_def .= " $data_type"; |
438 | |
439 | if ( lc $data_type eq 'enum' ) { |
440 | $field_def .= '(' . $commalist . ')'; |
441 | } |
442 | elsif ( defined $size[0] && $size[0] > 0 ) { |
443 | $field_def .= '(' . join( ', ', @size ) . ')'; |
444 | } |
445 | |
446 | # char sets |
447 | $field_def .= " CHARACTER SET $charset" if $charset; |
448 | $field_def .= " COLLATE $collate" if $collate; |
449 | |
450 | # MySQL qualifiers |
451 | for my $qual ( qw[ binary unsigned zerofill ] ) { |
452 | my $val = $extra{ $qual } || $extra{ uc $qual } or next; |
453 | $field_def .= " $qual"; |
454 | } |
455 | for my $qual ( 'character set', 'collate', 'on update' ) { |
456 | my $val = $extra{ $qual } || $extra{ uc $qual } or next; |
457 | $field_def .= " $qual $val"; |
458 | } |
459 | |
460 | # Null? |
461 | $field_def .= ' NOT NULL' unless $field->is_nullable; |
462 | |
463 | # Default? XXX Need better quoting! |
464 | my $default = $field->default_value; |
465 | if ( defined $default ) { |
466 | if ( uc $default eq 'NULL') { |
467 | $field_def .= ' DEFAULT NULL'; |
468 | } else { |
469 | $field_def .= " DEFAULT '$default'"; |
470 | } |
471 | } |
472 | |
473 | if ( my $comments = $field->comments ) { |
474 | $field_def .= qq[ comment '$comments']; |
475 | } |
476 | |
477 | # auto_increment? |
478 | $field_def .= " auto_increment" if $field->is_auto_increment; |
479 | |
480 | return $field_def; |
481 | } |
482 | |
da5a1bae |
483 | sub alter_create_index |
484 | { |
485 | my ($index, $options) = @_; |
486 | |
487 | my $qt = $options->{quote_table_names} || ''; |
488 | my $qf = $options->{quote_field_names} || ''; |
489 | |
490 | return join( ' ', |
491 | 'ALTER TABLE', |
492 | $qt.$index->table->name.$qt, |
493 | 'ADD', |
494 | create_index(@_) |
495 | ); |
496 | } |
497 | |
0013ee25 |
498 | sub create_index |
499 | { |
fe0f47d0 |
500 | my ($index, $options) = @_; |
501 | |
502 | my $qf = $options->{quote_field_names} || ''; |
0013ee25 |
503 | |
504 | return join( ' ', |
da5a1bae |
505 | lc $index->type eq 'normal' ? 'INDEX' : $index->type . ' INDEX', |
0013ee25 |
506 | $index->name, |
fe0f47d0 |
507 | '(' . $qf . join( "$qf, $qf", $index->fields ) . $qf . ')' |
0013ee25 |
508 | ); |
509 | |
510 | } |
511 | |
da5a1bae |
512 | sub alter_drop_index |
513 | { |
514 | my ($index, $options) = @_; |
515 | |
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 || $index->fields |
525 | ); |
526 | |
527 | } |
528 | |
529 | sub alter_drop_constraint |
530 | { |
531 | my ($c, $options) = @_; |
532 | |
533 | my $qt = $options->{quote_table_names} || ''; |
7725e1e6 |
534 | my $qc = $options->{quote_field_names} || ''; |
da5a1bae |
535 | |
536 | my $out = sprintf('ALTER TABLE %s DROP %s %s', |
7467c458 |
537 | $qt . $c->table->name . $qt, |
74ca32ce |
538 | $c->type eq FOREIGN_KEY ? $c->type : "INDEX", |
da5a1bae |
539 | $qc . $c->name . $qc ); |
540 | |
541 | return $out; |
542 | } |
543 | |
544 | sub alter_create_constraint |
545 | { |
546 | my ($index, $options) = @_; |
547 | |
548 | my $qt = $options->{quote_table_names} || ''; |
549 | return join( ' ', |
550 | 'ALTER TABLE', |
551 | $qt.$index->table->name.$qt, |
552 | 'ADD', |
553 | create_constraint(@_) ); |
554 | } |
555 | |
0013ee25 |
556 | sub create_constraint |
557 | { |
558 | my ($c, $options) = @_; |
559 | |
fb149f81 |
560 | my $qf = $options->{quote_field_names} || ''; |
561 | my $qt = $options->{quote_table_names} || ''; |
da5a1bae |
562 | my $leave_name = $options->{leave_name} || undef; |
fe0f47d0 |
563 | |
0013ee25 |
564 | my @fields = $c->fields or next; |
565 | |
566 | if ( $c->type eq PRIMARY_KEY ) { |
fe0f47d0 |
567 | return 'PRIMARY KEY (' . $qf . join("$qf, $qf", @fields). $qf . ')'; |
0013ee25 |
568 | } |
569 | elsif ( $c->type eq UNIQUE ) { |
570 | return |
fe0f47d0 |
571 | 'UNIQUE '. |
572 | (defined $c->name ? $qf.$c->name.$qf.' ' : ''). |
573 | '(' . $qf . join("$qf, $qf", @fields). $qf . ')'; |
0013ee25 |
574 | } |
575 | elsif ( $c->type eq FOREIGN_KEY ) { |
d529894e |
576 | # |
0013ee25 |
577 | # Make sure FK field is indexed or MySQL complains. |
5e56da9a |
578 | # |
0013ee25 |
579 | |
866d012e |
580 | my $table = $c->table; |
da5a1bae |
581 | my $c_name = $c->name; |
866d012e |
582 | |
0013ee25 |
583 | my $def = join(' ', |
fb149f81 |
584 | map { $_ || () } |
585 | 'CONSTRAINT', |
7725e1e6 |
586 | $qf . $c_name . $qf, |
fb149f81 |
587 | 'FOREIGN KEY' |
588 | ); |
0013ee25 |
589 | |
da5a1bae |
590 | |
fe0f47d0 |
591 | $def .= ' ('.$qf . join( "$qf, $qf", @fields ) . $qf . ')'; |
0013ee25 |
592 | |
fe0f47d0 |
593 | $def .= ' REFERENCES ' . $qt . $c->reference_table . $qt; |
0013ee25 |
594 | |
595 | my @rfields = map { $_ || () } $c->reference_fields; |
596 | unless ( @rfields ) { |
597 | my $rtable_name = $c->reference_table; |
866d012e |
598 | if ( my $ref_table = $table->schema->get_table( $rtable_name ) ) { |
0013ee25 |
599 | push @rfields, $ref_table->primary_key; |
1c14e9f1 |
600 | } |
0013ee25 |
601 | else { |
602 | warn "Can't find reference table '$rtable_name' " . |
603 | "in schema\n" if $options->{show_warnings}; |
5e56da9a |
604 | } |
605 | } |
606 | |
0013ee25 |
607 | if ( @rfields ) { |
fe0f47d0 |
608 | $def .= ' (' . $qf . join( "$qf, $qf", @rfields ) . $qf . ')'; |
0013ee25 |
609 | } |
610 | else { |
866d012e |
611 | warn "FK constraint on " . $table->name . '.' . |
0013ee25 |
612 | join('', @fields) . " has no reference fields\n" |
613 | if $options->{show_warnings}; |
614 | } |
5e56da9a |
615 | |
0013ee25 |
616 | if ( $c->match_type ) { |
617 | $def .= ' MATCH ' . |
618 | ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL'; |
619 | } |
620 | |
621 | if ( $c->on_delete ) { |
622 | $def .= ' ON DELETE '.join( ' ', $c->on_delete ); |
623 | } |
624 | |
625 | if ( $c->on_update ) { |
626 | $def .= ' ON UPDATE '.join( ' ', $c->on_update ); |
627 | } |
cd0ea0fd |
628 | return $def; |
9398955f |
629 | } |
630 | |
cd0ea0fd |
631 | return undef; |
0013ee25 |
632 | } |
633 | |
da5a1bae |
634 | sub alter_table |
635 | { |
636 | my ($to_table, $options) = @_; |
637 | |
7467c458 |
638 | my $qt = $options->{quote_table_names} || ''; |
da5a1bae |
639 | |
640 | my $table_options = generate_table_options($to_table) || ''; |
641 | my $out = sprintf('ALTER TABLE %s%s', |
642 | $qt . $to_table->name . $qt, |
643 | $table_options); |
644 | |
645 | return $out; |
646 | } |
647 | |
4d438549 |
648 | sub rename_field { alter_field(@_) } |
0013ee25 |
649 | sub alter_field |
650 | { |
fe0f47d0 |
651 | my ($from_field, $to_field, $options) = @_; |
652 | |
7467c458 |
653 | my $qf = $options->{quote_field_names} || ''; |
654 | my $qt = $options->{quote_table_names} || ''; |
0013ee25 |
655 | |
656 | my $out = sprintf('ALTER TABLE %s CHANGE COLUMN %s %s', |
fe0f47d0 |
657 | $qt . $to_field->table->name . $qt, |
4d438549 |
658 | $qf . $from_field->name . $qf, |
fe0f47d0 |
659 | create_field($to_field, $options)); |
0013ee25 |
660 | |
661 | return $out; |
662 | } |
663 | |
664 | sub add_field |
665 | { |
fe0f47d0 |
666 | my ($new_field, $options) = @_; |
667 | |
7467c458 |
668 | my $qt = $options->{quote_table_names} || ''; |
0013ee25 |
669 | |
670 | my $out = sprintf('ALTER TABLE %s ADD COLUMN %s', |
fe0f47d0 |
671 | $qt . $new_field->table->name . $qt, |
672 | create_field($new_field, $options)); |
0013ee25 |
673 | |
674 | return $out; |
675 | |
676 | } |
677 | |
678 | sub drop_field |
679 | { |
fe0f47d0 |
680 | my ($old_field, $options) = @_; |
0013ee25 |
681 | |
7467c458 |
682 | my $qf = $options->{quote_field_names} || ''; |
683 | my $qt = $options->{quote_table_names} || ''; |
fe0f47d0 |
684 | |
0013ee25 |
685 | my $out = sprintf('ALTER TABLE %s DROP COLUMN %s', |
fe0f47d0 |
686 | $qt . $old_field->table->name . $qt, |
687 | $qf . $old_field->name . $qf); |
0013ee25 |
688 | |
689 | return $out; |
690 | |
9398955f |
691 | } |
692 | |
4d438549 |
693 | sub batch_alter_table { |
694 | my ($table, $diff_hash, $options) = @_; |
695 | |
f9ed5d54 |
696 | # InnoDB has an issue with dropping and re-adding a FK constraint under the |
697 | # name in a single alter statment, see: http://bugs.mysql.com/bug.php?id=13741 |
698 | # |
699 | # We have to work round this. |
700 | |
701 | my %fks_to_alter; |
702 | my %fks_to_drop = map { |
703 | $_->type eq FOREIGN_KEY |
704 | ? ( $_->name => $_ ) |
705 | : ( ) |
706 | } @{$diff_hash->{alter_drop_constraint} }; |
707 | |
708 | my %fks_to_create = map { |
709 | if ( $_->type eq FOREIGN_KEY) { |
710 | $fks_to_alter{$_->name} = $fks_to_drop{$_->name} if $fks_to_drop{$_->name}; |
711 | ( $_->name => $_ ); |
712 | } else { ( ) } |
713 | } @{$diff_hash->{alter_create_constraint} }; |
714 | |
715 | my $drop_stmt = ''; |
716 | if (scalar keys %fks_to_alter) { |
717 | $diff_hash->{alter_drop_constraint} = [ |
718 | grep { !$fks_to_alter{$_->name} } @{ $diff_hash->{alter_drop_constraint} } |
719 | ]; |
720 | |
721 | $drop_stmt = batch_alter_table($table, { alter_drop_constraint => [ values %fks_to_alter ] }, $options) |
722 | . "\n"; |
723 | |
724 | } |
725 | |
4d438549 |
726 | my @stmts = map { |
727 | if (@{ $diff_hash->{$_} || [] }) { |
728 | my $meth = __PACKAGE__->can($_) or die __PACKAGE__ . " cant $_"; |
f9ed5d54 |
729 | map { $meth->( (ref $_ eq 'ARRAY' ? @$_ : $_), $options ) } @{ $diff_hash->{$_} } |
4d438549 |
730 | } else { () } |
46bf5655 |
731 | } qw/rename_table |
732 | alter_drop_constraint |
4d438549 |
733 | alter_drop_index |
734 | drop_field |
735 | add_field |
736 | alter_field |
737 | rename_field |
738 | alter_create_index |
739 | alter_create_constraint |
740 | alter_table/; |
741 | |
46bf5655 |
742 | # rename_table makes things a bit more complex |
743 | my $renamed_from = ""; |
744 | $renamed_from = $diff_hash->{rename_table}[0][0]->name |
745 | if $diff_hash->{rename_table} && @{$diff_hash->{rename_table}}; |
746 | |
4d438549 |
747 | return unless @stmts; |
748 | # Just zero or one stmts. return now |
f9ed5d54 |
749 | return "$drop_stmt@stmts;" unless @stmts > 1; |
4d438549 |
750 | |
751 | # Now strip off the 'ALTER TABLE xyz' of all but the first one |
752 | |
7467c458 |
753 | my $qt = $options->{quote_table_names} || ''; |
4104f82b |
754 | my $table_name = $qt . $table->name . $qt; |
755 | |
756 | |
757 | my $re = $renamed_from |
758 | ? qr/^ALTER TABLE (?:\Q$table_name\E|\Q$qt$renamed_from$qt\E) / |
759 | : qr/^ALTER TABLE \Q$table_name\E /; |
4d438549 |
760 | |
761 | my $first = shift @stmts; |
4104f82b |
762 | my ($alter_table) = $first =~ /($re)/; |
46bf5655 |
763 | |
4d438549 |
764 | my $padd = " " x length($alter_table); |
765 | |
f9ed5d54 |
766 | return $drop_stmt . join( ",\n", $first, map { s/$re//; $padd . $_ } @stmts) . ';'; |
4104f82b |
767 | |
4d438549 |
768 | } |
769 | |
770 | sub drop_table { |
46bf5655 |
771 | my ($table, $options) = @_; |
772 | |
773 | my $qt = $options->{quote_table_names} || ''; |
4d438549 |
774 | |
775 | # Drop (foreign key) constraints so table drops cleanly |
46bf5655 |
776 | my @sql = batch_alter_table($table, { alter_drop_constraint => [ grep { $_->type eq 'FOREIGN KEY' } $table->get_constraints ] }, $options); |
777 | |
778 | return join("\n", @sql, "DROP TABLE $qt$table$qt;"); |
779 | |
780 | } |
781 | |
782 | sub rename_table { |
783 | my ($old_table, $new_table, $options) = @_; |
4d438549 |
784 | |
46bf5655 |
785 | my $qt = $options->{quote_table_names} || ''; |
4d438549 |
786 | |
46bf5655 |
787 | return "ALTER TABLE $qt$old_table$qt RENAME TO $qt$new_table$qt"; |
4d438549 |
788 | } |
789 | |
da5a1bae |
790 | sub next_unused_name { |
791 | my $name = shift || ''; |
792 | if ( !defined($used_names{$name}) ) { |
793 | $used_names{$name} = $name; |
794 | return $name; |
795 | } |
796 | |
797 | my $i = 1; |
798 | while ( defined($used_names{$name . '_' . $i}) ) { |
799 | ++$i; |
800 | } |
801 | $name .= '_' . $i; |
802 | $used_names{$name} = $name; |
803 | return $name; |
804 | } |
805 | |
9398955f |
806 | 1; |
9398955f |
807 | |
c855a748 |
808 | # ------------------------------------------------------------------- |
9398955f |
809 | |
c855a748 |
810 | =pod |
811 | |
812 | =head1 SEE ALSO |
813 | |
814 | SQL::Translator, http://www.mysql.com/. |
9398955f |
815 | |
2d6979da |
816 | =head1 AUTHORS |
9398955f |
817 | |
758ab1cd |
818 | darren chamberlain E<lt>darren@cpan.orgE<gt>, |
c855a748 |
819 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt>. |
820 | |
821 | =cut |