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1 | #!/usr/bin/env perl |
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2 | # vim: set ft=perl: |
3 | |
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4 | # ------------------------------------------------------------------- |
5 | # Copyright (C) 2002-2009 The SQLFairy Authors |
6 | # |
7 | # This program is free software; you can redistribute it and/or |
8 | # modify it under the terms of the GNU General Public License as |
9 | # published by the Free Software Foundation; version 2. |
10 | # |
11 | # This program is distributed in the hope that it will be useful, but |
12 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | # General Public License for more details. |
15 | # |
16 | # You should have received a copy of the GNU General Public License |
17 | # along with this program; if not, write to the Free Software |
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18 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
19 | # 02110-1301 USA. |
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20 | # ------------------------------------------------------------------- |
21 | |
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22 | =head1 NAME |
23 | |
24 | sqlt-diff - find the differences b/w two schemas |
25 | |
26 | =head1 SYNOPSIS |
27 | |
28 | For help: |
29 | |
30 | sqlt-diff -h|--help |
31 | |
32 | For a list of all valid parsers: |
33 | |
34 | sqlt -l|--list |
35 | |
36 | To diff two schemas: |
37 | |
38 | sqlt-diff [options] file_name1=parser file_name2=parser |
39 | |
40 | Options: |
41 | |
42 | -d|--debug Show debugging info |
43 | |
44 | =head1 DESCRIPTION |
45 | |
46 | sqlt-diff is a utility for creating a file of SQL commands necessary to |
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47 | transform the first schema provided to the second. While not yet |
48 | exhaustive in its ability to mutate the entire schema, it will report the |
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49 | following |
50 | |
51 | =over |
52 | |
53 | =item * New tables |
54 | |
55 | Using the Producer class of the target (second) schema, any tables missing |
56 | in the first schema will be generated in their entirety (fields, constraints, |
57 | indices). |
58 | |
59 | =item * Missing/altered fields |
60 | |
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61 | Any fields missing or altered between the two schemas will be reported |
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62 | as: |
63 | |
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64 | ALTER TABLE <table_name> |
65 | [DROP <field_name>] |
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66 | [CHANGE <field_name> <datatype> (<size>)] ; |
67 | |
68 | =item * Missing/altered indices |
69 | |
70 | Any indices missing or of a different type or on different fields will be |
71 | indicated. Indices that should be dropped will be reported as such: |
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72 | |
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73 | DROP INDEX <index_name> ON <table_name> ; |
74 | |
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75 | An index of a different type or on different fields will be reported as a |
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76 | new index as such: |
77 | |
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78 | CREATE [<index_type>] INDEX [<index_name>] ON <table_name> |
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79 | ( <field_name>[,<field_name>] ) ; |
80 | |
81 | =back |
82 | |
83 | "ALTER/DROP TABLE" and "CREATE INDEX" statements B<are not> generated by |
84 | the Producer, unfortunately, and may require massaging before being passed to |
85 | your target database. |
86 | |
87 | =cut |
88 | |
89 | # ------------------------------------------------------------------- |
90 | |
91 | use strict; |
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92 | use warnings; |
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93 | use Pod::Usage; |
94 | use Data::Dumper; |
95 | use SQL::Translator; |
96 | use SQL::Translator::Schema::Constants; |
97 | |
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98 | use vars qw( $VERSION ); |
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99 | $VERSION = '1.59'; |
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100 | |
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101 | my ( @input, $list, $help, $debug ); |
102 | for my $arg ( @ARGV ) { |
103 | if ( $arg =~ m/^-?-l(ist)?$/ ) { |
104 | $list = 1; |
105 | } |
106 | elsif ( $arg =~ m/^-?-h(elp)?$/ ) { |
107 | $help = 1; |
108 | } |
109 | elsif ( $arg =~ m/^-?-d(ebug)?$/ ) { |
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110 | $debug = 1; |
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111 | } |
112 | elsif ( $arg =~ m/^([^=]+)=(.+)$/ ) { |
113 | push @input, { file => $1, parser => $2 }; |
114 | } |
115 | else { |
116 | pod2usage( msg => "Unknown argument '$arg'" ); |
117 | } |
118 | } |
119 | |
120 | pod2usage(1) if $help; |
121 | pod2usage('Please specify only two schemas to diff') if scalar @input > 2; |
eca76a50 |
122 | pod2usage('No input') if !@input; |
123 | |
124 | if ( my $interactive = -t STDIN && -t STDOUT ) { |
125 | print STDERR join("\n", |
126 | "sqlt-diff-old is deprecated. Please sqlt-diff, and tell us ", |
127 | "about any problems or patch SQL::Translator::Diff", |
128 | '', |
129 | ); |
130 | } |
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131 | |
132 | my $tr = SQL::Translator->new; |
133 | my @parsers = $tr->list_parsers; |
134 | my %valid_parsers = map { $_, 1 } @parsers; |
135 | |
136 | if ( $list ) { |
137 | print "\nParsers:\n", map { "\t$_\n" } sort @parsers; |
138 | print "\n"; |
139 | exit(0); |
140 | } |
141 | |
142 | pod2usage( msg => 'Too many file args' ) if @input > 2; |
143 | |
144 | my ( $source_schema, $source_db, $target_schema, $target_db ); |
145 | |
146 | my $i = 2; |
147 | for my $in ( @input ) { |
148 | my $file = $in->{'file'}; |
149 | my $parser = $in->{'parser'}; |
150 | |
151 | die "Unable to read file '$file'\n" unless -r $file; |
152 | die "'$parser' is an invalid parser\n" unless $valid_parsers{ $parser }; |
153 | |
154 | my $t = SQL::Translator->new; |
155 | $t->debug( $debug ); |
156 | $t->parser( $parser ) or die $tr->error; |
157 | my $out = $t->translate( $file ) or die $tr->error; |
158 | my $schema = $t->schema; |
159 | unless ( $schema->name ) { |
160 | $schema->name( $file ); |
161 | } |
162 | |
163 | if ( $i == 1 ) { |
164 | $source_schema = $schema; |
165 | $source_db = $parser; |
166 | } |
167 | else { |
168 | $target_schema = $schema; |
169 | $target_db = $parser; |
170 | } |
171 | $i--; |
172 | } |
173 | my $case_insensitive = $target_db =~ /SQLServer/; |
174 | |
175 | my $s1_name = $source_schema->name; |
176 | my $s2_name = $target_schema->name; |
177 | my ( @new_tables, @diffs , @diffs_at_end); |
178 | for my $t1 ( $source_schema->get_tables ) { |
179 | my $t1_name = $t1->name; |
180 | my $t2 = $target_schema->get_table( $t1_name, $case_insensitive ); |
181 | |
182 | warn "TABLE '$s1_name.$t1_name'\n" if $debug; |
183 | unless ( $t2 ) { |
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184 | warn "Couldn't find table '$s1_name.$t1_name' in '$s2_name'\n" |
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185 | if $debug; |
186 | if ( $target_db =~ /(SQLServer|Oracle)/ ) { |
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187 | for my $constraint ( $t1->get_constraints ) { |
188 | next if $constraint->type ne FOREIGN_KEY; |
189 | push @diffs_at_end, "ALTER TABLE $t1_name ADD ". |
190 | constraint_to_string($constraint, $source_schema).";"; |
191 | $t1->drop_constraint($constraint); |
192 | } |
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193 | } |
194 | push @new_tables, $t1; |
195 | next; |
196 | } |
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197 | |
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198 | # Go through our options |
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199 | my $options_different = 0; |
200 | my %checkedOptions; |
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201 | OPTION: |
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202 | for my $t1_option_ref ( $t1->options ) { |
203 | my($key1, $value1) = %{$t1_option_ref}; |
204 | for my $t2_option_ref ( $t2->options ) { |
205 | my($key2, $value2) = %{$t2_option_ref}; |
206 | if ( $key1 eq $key2 ) { |
207 | if ( defined $value1 != defined $value2 ) { |
208 | $options_different = 1; |
209 | last OPTION; |
210 | } |
211 | if ( defined $value1 && $value1 ne $value2 ) { |
212 | $options_different = 1; |
213 | last OPTION; |
214 | } |
215 | $checkedOptions{$key1} = 1; |
216 | next OPTION; |
217 | } |
218 | } |
219 | $options_different = 1; |
220 | last OPTION; |
221 | } |
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222 | # Go through the other table's options |
223 | unless ( $options_different ) { |
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224 | for my $t2_option_ref ( $t2->options ) { |
225 | my($key, $value) = %{$t2_option_ref}; |
226 | next if $checkedOptions{$key}; |
227 | $options_different = 1; |
228 | last; |
229 | } |
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230 | } |
231 | # If there's a difference, just re-set all the options |
232 | my @diffs_table_options; |
233 | if ( $options_different ) { |
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234 | my @options = (); |
235 | foreach my $option_ref ( $t1->options ) { |
236 | my($key, $value) = %{$option_ref}; |
237 | push(@options, defined $value ? "$key=$value" : $key); |
238 | } |
239 | my $options = join(' ', @options); |
240 | @diffs_table_options = ("ALTER TABLE $t1_name $options;"); |
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241 | } |
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242 | |
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243 | my $t2_name = $t2->name; |
244 | my(@diffs_table_adds, @diffs_table_changes); |
245 | for my $t1_field ( $t1->get_fields ) { |
246 | my $f1_type = $t1_field->data_type; |
247 | my $f1_size = $t1_field->size; |
248 | my $f1_name = $t1_field->name; |
249 | my $f1_nullable = $t1_field->is_nullable; |
250 | my $f1_default = $t1_field->default_value; |
251 | my $f1_auto_inc = $t1_field->is_auto_increment; |
252 | my $t2_field = $t2->get_field( $f1_name, $case_insensitive ); |
253 | my $f1_full_name = "$s1_name.$t1_name.$t1_name"; |
254 | warn "FIELD '$f1_full_name'\n" if $debug; |
255 | |
256 | my $f2_full_name = "$s2_name.$t2_name.$f1_name"; |
257 | |
258 | unless ( $t2_field ) { |
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259 | warn "Couldn't find field '$f2_full_name' in '$t2_name'\n" |
da5a1bae |
260 | if $debug; |
261 | my $temp_default_value = 0; |
262 | if ( $target_db =~ /SQLServer/ && !$f1_nullable && !defined $f1_default ) { |
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263 | # SQL Server doesn't allow adding non-nullable, non-default columns |
264 | # so we add it with a default value, then remove the default value |
265 | $temp_default_value = 1; |
266 | my(@numeric_types) = qw(decimal numeric float real int bigint smallint tinyint); |
267 | $f1_default = grep($_ eq $f1_type, @numeric_types) ? 0 : ''; |
da5a1bae |
268 | } |
269 | push @diffs_table_adds, sprintf( "ALTER TABLE %s ADD %s%s %s%s%s%s%s%s;", |
270 | $t1_name, $target_db =~ /Oracle/ ? '(' : '', |
271 | $f1_name, $f1_type, |
272 | ($f1_size && $f1_type !~ /(blob|text)$/) ? "($f1_size)" : '', |
273 | !defined $f1_default ? '' |
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274 | : uc $f1_default eq 'NULL' ? ' DEFAULT NULL' |
275 | : uc $f1_default eq 'CURRENT_TIMESTAMP' ? ' DEFAULT CURRENT_TIMESTAMP' |
276 | : " DEFAULT '$f1_default'", |
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277 | $f1_nullable ? '' : ' NOT NULL', |
278 | $f1_auto_inc ? ' AUTO_INCREMENT' : '', |
279 | $target_db =~ /Oracle/ ? ')' : '', |
280 | ); |
281 | if ( $temp_default_value ) { |
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282 | undef $f1_default; |
283 | push @diffs_table_adds, sprintf( <<END |
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284 | DECLARE \@defname VARCHAR(100), \@cmd VARCHAR(1000) |
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285 | SET \@defname = |
286 | (SELECT name |
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287 | FROM sysobjects so JOIN sysconstraints sc |
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288 | ON so.id = sc.constid |
289 | WHERE object_name(so.parent_obj) = '%s' |
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290 | AND so.xtype = 'D' |
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291 | AND sc.colid = |
292 | (SELECT colid FROM syscolumns |
293 | WHERE id = object_id('%s') AND |
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294 | name = '%s')) |
295 | SET \@cmd = 'ALTER TABLE %s DROP CONSTRAINT ' |
296 | + \@defname |
297 | EXEC(\@cmd) |
298 | END |
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299 | , $t1_name, $t1_name, $f1_name, $t1_name, |
300 | ); |
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301 | } |
302 | next; |
303 | } |
304 | |
305 | my $f2_type = $t2_field->data_type; |
306 | my $f2_size = $t2_field->size || ''; |
307 | my $f2_nullable = $t2_field->is_nullable; |
308 | my $f2_default = $t2_field->default_value; |
309 | my $f2_auto_inc = $t2_field->is_auto_increment; |
310 | if ( !$t1_field->equals($t2_field, $case_insensitive) ) { |
aee4b66e |
311 | # SQLServer timestamp fields can't be altered, so we drop and add instead |
312 | if ( $target_db =~ /SQLServer/ && $f2_type eq "timestamp" ) { |
313 | push @diffs_table_changes, "ALTER TABLE $t1_name DROP COLUMN $f1_name;"; |
314 | push @diffs_table_changes, sprintf( "ALTER TABLE %s ADD %s%s %s%s%s%s%s%s;", |
315 | $t1_name, $target_db =~ /Oracle/ ? '(' : '', |
316 | $f1_name, $f1_type, |
317 | ($f1_size && $f1_type !~ /(blob|text)$/) ? "($f1_size)" : '', |
318 | !defined $f1_default ? '' |
319 | : uc $f1_default eq 'NULL' ? ' DEFAULT NULL' |
320 | : uc $f1_default eq 'CURRENT_TIMESTAMP' ? ' DEFAULT CURRENT_TIMESTAMP' |
321 | : " DEFAULT '$f1_default'", |
322 | $f1_nullable ? '' : ' NOT NULL', |
323 | $f1_auto_inc ? ' AUTO_INCREMENT' : '', |
324 | $target_db =~ /Oracle/ ? ')' : '', |
325 | ); |
326 | next; |
327 | } |
328 | |
329 | my $changeText = $target_db =~ /SQLServer/ ? 'ALTER COLUMN' : |
330 | $target_db =~ /Oracle/ ? 'MODIFY (' : 'CHANGE'; |
331 | my $nullText = $f1_nullable ? '' : ' NOT NULL'; |
332 | $nullText = '' if $target_db =~ /Oracle/ && $f1_nullable == $f2_nullable; |
da5a1bae |
333 | push @diffs_table_changes, sprintf( "ALTER TABLE %s %s %s%s %s%s%s%s%s%s;", |
334 | $t1_name, $changeText, |
335 | $f1_name, $target_db =~ /MySQL/ ? " $f1_name" : '', |
336 | $f1_type, ($f1_size && $f1_type !~ /(blob|text)$/) ? "($f1_size)" : '', |
337 | $nullText, |
338 | !defined $f1_default || $target_db =~ /SQLServer/ ? '' |
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339 | : uc $f1_default eq 'NULL' ? ' DEFAULT NULL' |
340 | : uc $f1_default eq 'CURRENT_TIMESTAMP' ? ' DEFAULT CURRENT_TIMESTAMP' |
341 | : " DEFAULT '$f1_default'", |
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342 | $f1_auto_inc ? ' AUTO_INCREMENT' : '', |
343 | $target_db =~ /Oracle/ ? ')' : '', |
344 | ); |
345 | if ( defined $f1_default && $target_db =~ /SQLServer/ ) { |
aee4b66e |
346 | # Adding a column with a default value for SQL Server means adding a |
347 | # constraint and setting existing NULLs to the default value |
348 | push @diffs_table_changes, sprintf( "ALTER TABLE %s ADD CONSTRAINT DF_%s_%s %s FOR %s;", |
349 | $t1_name, $t1_name, $f1_name, uc $f1_default eq 'NULL' ? 'DEFAULT NULL' |
350 | : uc $f1_default eq 'CURRENT_TIMESTAMP' ? 'DEFAULT CURRENT_TIMESTAMP' |
351 | : "DEFAULT '$f1_default'", $f1_name, |
da5a1bae |
352 | ); |
aee4b66e |
353 | push @diffs_table_changes, sprintf( "UPDATE %s SET %s = %s WHERE %s IS NULL;", |
354 | $t1_name, $f1_name, uc $f1_default eq 'NULL' ? 'NULL' |
355 | : uc $f1_default eq 'CURRENT_TIMESTAMP' ? 'CURRENT_TIMESTAMP' |
356 | : "'$f1_default'", $f1_name, |
da5a1bae |
357 | ); |
358 | } |
359 | } |
360 | } |
aee4b66e |
361 | |
362 | my(%checked_indices, @diffs_index_creates, @diffs_index_drops); |
da5a1bae |
363 | INDEX: |
aee4b66e |
364 | for my $i1 ( $t1->get_indices ) { |
365 | for my $i2 ( $t2->get_indices ) { |
366 | if ( $i1->equals($i2, $case_insensitive) ) { |
367 | $checked_indices{$i2} = 1; |
368 | next INDEX; |
369 | } |
370 | } |
371 | push @diffs_index_creates, sprintf( |
da5a1bae |
372 | "CREATE %sINDEX%s ON %s (%s);", |
373 | $i1->type eq NORMAL ? '' : $i1->type." ", |
374 | $i1->name ? " ".$i1->name : '', |
375 | $t1_name, |
376 | join(",", $i1->fields), |
377 | ); |
aee4b66e |
378 | } |
da5a1bae |
379 | INDEX2: |
aee4b66e |
380 | for my $i2 ( $t2->get_indices ) { |
381 | next if $checked_indices{$i2}; |
382 | for my $i1 ( $t1->get_indices ) { |
383 | next INDEX2 if $i2->equals($i1, $case_insensitive); |
384 | } |
385 | $target_db =~ /SQLServer/ |
386 | ? push @diffs_index_drops, "DROP INDEX $t1_name.".$i2->name.";" |
387 | : push @diffs_index_drops, "DROP INDEX ".$i2->name." on $t1_name;"; |
388 | } |
389 | |
390 | my(%checked_constraints, @diffs_constraint_drops); |
da5a1bae |
391 | CONSTRAINT: |
aee4b66e |
392 | for my $c1 ( $t1->get_constraints ) { |
393 | next if $source_db =~ /Oracle/ && $c1->type eq UNIQUE && $c1->name =~ /^SYS_/i; |
394 | for my $c2 ( $t2->get_constraints ) { |
395 | if ( $c1->equals($c2, $case_insensitive) ) { |
396 | $checked_constraints{$c2} = 1; |
397 | next CONSTRAINT; |
398 | } |
399 | } |
400 | push @diffs_at_end, "ALTER TABLE $t1_name ADD ". |
401 | constraint_to_string($c1, $source_schema).";"; |
402 | } |
da5a1bae |
403 | CONSTRAINT2: |
aee4b66e |
404 | for my $c2 ( $t2->get_constraints ) { |
405 | next if $checked_constraints{$c2}; |
406 | for my $c1 ( $t1->get_constraints ) { |
407 | next CONSTRAINT2 if $c2->equals($c1, $case_insensitive); |
408 | } |
409 | if ( $c2->type eq UNIQUE ) { |
410 | push @diffs_constraint_drops, "ALTER TABLE $t1_name DROP INDEX ". |
411 | $c2->name.";"; |
412 | } elsif ( $target_db =~ /SQLServer/ ) { |
413 | push @diffs_constraint_drops, "ALTER TABLE $t1_name DROP ".$c2->name.";"; |
414 | } else { |
415 | push @diffs_constraint_drops, "ALTER TABLE $t1_name DROP ".$c2->type. |
416 | ($c2->type eq FOREIGN_KEY ? " ".$c2->name : '').";"; |
417 | } |
418 | } |
419 | |
420 | push @diffs, @diffs_index_drops, @diffs_constraint_drops, |
421 | @diffs_table_options, @diffs_table_adds, |
422 | @diffs_table_changes, @diffs_index_creates; |
da5a1bae |
423 | } |
424 | |
425 | for my $t2 ( $target_schema->get_tables ) { |
426 | my $t2_name = $t2->name; |
427 | my $t1 = $source_schema->get_table( $t2_name, $target_db =~ /SQLServer/ ); |
428 | |
429 | unless ( $t1 ) { |
aee4b66e |
430 | if ( $target_db =~ /SQLServer/ ) { |
431 | for my $constraint ( $t2->get_constraints ) { |
432 | next if $constraint->type eq PRIMARY_KEY; |
433 | push @diffs, "ALTER TABLE $t2_name DROP ".$constraint->name.";"; |
434 | } |
435 | } |
da5a1bae |
436 | push @diffs_at_end, "DROP TABLE $t2_name;"; |
437 | next; |
438 | } |
439 | |
440 | for my $t2_field ( $t2->get_fields ) { |
441 | my $f2_name = $t2_field->name; |
442 | my $t1_field = $t1->get_field( $f2_name ); |
443 | unless ( $t1_field ) { |
aee4b66e |
444 | my $modifier = $target_db =~ /SQLServer/ ? "COLUMN " : ''; |
da5a1bae |
445 | push @diffs, "ALTER TABLE $t2_name DROP $modifier$f2_name;"; |
446 | } |
447 | } |
448 | } |
449 | |
450 | if ( @new_tables ) { |
451 | my $dummy_tr = SQL::Translator->new; |
452 | $dummy_tr->schema->add_table( $_ ) for @new_tables; |
453 | my $producer = $dummy_tr->producer( $target_db ); |
454 | unshift @diffs, $producer->( $dummy_tr ); |
455 | } |
456 | push(@diffs, @diffs_at_end); |
457 | |
458 | if ( @diffs ) { |
459 | if ( $source_db !~ /^(MySQL|SQLServer|Oracle)$/ ) { |
460 | unshift(@diffs, "-- Target database $target_db is untested/unsupported!!!"); |
461 | } |
462 | } |
463 | |
da5a1bae |
464 | if ( @diffs ) { |
aee4b66e |
465 | print join( "\n", |
da5a1bae |
466 | "-- Convert schema '$s2_name' to '$s1_name':\n", @diffs, "\n" |
467 | ); |
468 | exit(1); |
469 | } |
470 | else { |
471 | print "There were no differences.\n"; |
472 | } |
473 | |
474 | sub constraint_to_string { |
aee4b66e |
475 | my $c = shift; |
476 | my $schema = shift or die "No schema given"; |
477 | my @fields = $c->field_names or return ''; |
478 | |
479 | if ( $c->type eq PRIMARY_KEY ) { |
480 | if ( $target_db =~ /Oracle/ ) { |
481 | return (defined $c->name ? 'CONSTRAINT '.$c->name.' ' : '') . |
482 | 'PRIMARY KEY (' . join(', ', @fields). ')'; |
483 | } else { |
484 | return 'PRIMARY KEY (' . join(', ', @fields). ')'; |
485 | } |
486 | } |
487 | elsif ( $c->type eq UNIQUE ) { |
488 | if ( $target_db =~ /Oracle/ ) { |
489 | return (defined $c->name ? 'CONSTRAINT '.$c->name.' ' : '') . |
490 | 'UNIQUE (' . join(', ', @fields). ')'; |
491 | } else { |
492 | return 'UNIQUE '. |
493 | (defined $c->name ? $c->name.' ' : ''). |
494 | '(' . join(', ', @fields). ')'; |
495 | } |
496 | } |
497 | elsif ( $c->type eq FOREIGN_KEY ) { |
498 | my $def = join(' ', |
499 | map { $_ || () } 'CONSTRAINT', $c->name, 'FOREIGN KEY' |
500 | ); |
501 | |
502 | $def .= ' (' . join( ', ', @fields ) . ')'; |
503 | |
504 | $def .= ' REFERENCES ' . $c->reference_table; |
505 | |
506 | my @rfields = map { $_ || () } $c->reference_fields; |
507 | unless ( @rfields ) { |
508 | my $rtable_name = $c->reference_table; |
509 | if ( my $ref_table = $schema->get_table( $rtable_name ) ) { |
510 | push @rfields, $ref_table->primary_key; |
511 | } |
512 | else { |
513 | warn "Can't find reference table '$rtable_name' " . |
514 | "in schema\n"; |
515 | } |
516 | } |
517 | |
518 | if ( @rfields ) { |
519 | $def .= ' (' . join( ', ', @rfields ) . ')'; |
520 | } |
521 | else { |
522 | warn "FK constraint on " . 'some table' . '.' . |
523 | join('', @fields) . " has no reference fields\n"; |
524 | } |
525 | |
526 | if ( $c->match_type ) { |
527 | $def .= ' MATCH ' . |
528 | ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL'; |
529 | } |
530 | |
531 | if ( $c->on_delete ) { |
532 | $def .= ' ON DELETE '.join( ' ', $c->on_delete ); |
533 | } |
534 | |
535 | if ( $c->on_update ) { |
536 | $def .= ' ON UPDATE '.join( ' ', $c->on_update ); |
537 | } |
538 | |
539 | return $def; |
540 | } |
da5a1bae |
541 | } |
aee4b66e |
542 | |
da5a1bae |
543 | # ------------------------------------------------------------------- |
544 | # Bring out number weight & measure in a year of dearth. |
545 | # William Blake |
546 | # ------------------------------------------------------------------- |
547 | |
548 | =pod |
549 | |
550 | =head1 AUTHOR |
551 | |
969049ba |
552 | Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>. |
da5a1bae |
553 | |
554 | =head1 SEE ALSO |
555 | |
556 | SQL::Translator, L<http://sqlfairy.sourceforge.net>. |
557 | |
558 | =cut |