Commit | Line | Data |
51ffe5ee |
1 | package SQL::Translator::Diff; |
2 | ## SQLT schema diffing code |
3 | use strict; |
4 | use warnings; |
5 | use SQL::Translator::Schema::Constants; |
6 | |
7 | sub schema_diff |
8 | { |
9 | # use Data::Dumper; |
10 | my ($source_schema, $source_db, $target_schema, $target_db, $options) = @_; |
11 | # print Data::Dumper::Dumper($target_schema); |
12 | my $caseopt = $options->{caseopt} || 0; |
13 | my $debug = $options->{debug} || 0; |
14 | my $trace = $options->{trace} || 0; |
15 | |
16 | my $case_insensitive = $source_db =~ /SQLServer/ || $caseopt; |
17 | |
18 | my $tar_name = $target_schema->name; |
19 | my $src_name = $source_schema->name; |
20 | my ( @new_tables, @diffs , @diffs_at_end); |
21 | for my $tar_table ( $target_schema->get_tables ) { |
22 | my $tar_table_name = $tar_table->name; |
23 | my $src_table = $source_schema->get_table( $tar_table_name, $case_insensitive ); |
24 | |
25 | warn "TABLE '$tar_name.$tar_table_name'\n" if $debug; |
26 | unless ( $src_table ) { |
27 | warn "Couldn't find table '$tar_name.$tar_table_name' in '$src_name'\n" |
28 | if $debug; |
29 | if ( $source_db =~ /(SQLServer|Oracle)/ ) { |
30 | for my $constraint ( $tar_table->get_constraints ) { |
31 | next if $constraint->type ne FOREIGN_KEY; |
32 | push @diffs_at_end, "ALTER TABLE $tar_table_name ADD ". |
33 | constraint_to_string($constraint, $source_db, $target_schema).";"; |
34 | $tar_table->drop_constraint($constraint); |
35 | } |
36 | } |
37 | push @new_tables, $tar_table; |
38 | next; |
39 | } |
40 | |
41 | # Go through our options |
42 | my $options_different = 0; |
43 | my %checkedOptions; |
44 | OPTION: |
45 | for my $tar_table_option_ref ( $tar_table->options ) { |
46 | my($key_tar, $value_tar) = %{$tar_table_option_ref}; |
47 | for my $src_table_option_ref ( $src_table->options ) { |
48 | my($key_src, $value_src) = %{$src_table_option_ref}; |
49 | if ( $key_tar eq $key_src ) { |
50 | if ( defined $value_tar != defined $value_src ) { |
51 | $options_different = 1; |
52 | last OPTION; |
53 | } |
54 | if ( defined $value_tar && $value_tar ne $value_src ) { |
55 | $options_different = 1; |
56 | last OPTION; |
57 | } |
58 | $checkedOptions{$key_tar} = 1; |
59 | next OPTION; |
60 | } |
61 | } |
62 | $options_different = 1; |
63 | last OPTION; |
64 | } |
65 | # Go through the other table's options |
66 | unless ( $options_different ) { |
67 | for my $src_table_option_ref ( $src_table->options ) { |
68 | my($key, $value) = %{$src_table_option_ref}; |
69 | next if $checkedOptions{$key}; |
70 | $options_different = 1; |
71 | last; |
72 | } |
73 | } |
74 | # If there's a difference, just re-set all the options |
75 | my @diffs_table_options; |
76 | if ( $options_different ) { |
77 | my @options = (); |
78 | foreach my $option_ref ( $tar_table->options ) { |
79 | my($key, $value) = %{$option_ref}; |
80 | push(@options, defined $value ? "$key=$value" : $key); |
81 | } |
82 | my $options = join(' ', @options); |
83 | @diffs_table_options = ("ALTER TABLE $tar_table_name $options;"); |
84 | } |
85 | |
86 | my $src_table_name = $src_table->name; |
87 | my(@diffs_table_adds, @diffs_table_changes); |
88 | for my $tar_table_field ( $tar_table->get_fields ) { |
89 | my $f_tar_type = $tar_table_field->data_type; |
90 | my $f_tar_size = $tar_table_field->size; |
91 | my $f_tar_name = $tar_table_field->name; |
92 | my $f_tar_nullable = $tar_table_field->is_nullable; |
93 | my $f_tar_default = $tar_table_field->default_value; |
94 | my $f_tar_auto_inc = $tar_table_field->is_auto_increment; |
95 | my $src_table_field = $src_table->get_field( $f_tar_name, $case_insensitive ); |
96 | my $f_tar_full_name = "$tar_name.$tar_table_name.$tar_table_name"; |
97 | warn "FIELD '$f_tar_full_name'\n" if $debug; |
98 | |
99 | my $f_src_full_name = "$src_name.$src_table_name.$f_tar_name"; |
100 | |
101 | unless ( $src_table_field ) { |
102 | warn "Couldn't find field '$f_src_full_name' in '$src_table_name'\n" |
103 | if $debug; |
104 | my $temp_default_value = 0; |
105 | if ( $source_db =~ /SQLServer/ && |
106 | !$f_tar_nullable && |
107 | !defined $f_tar_default ) { |
108 | # SQL Server doesn't allow adding non-nullable, non-default columns |
109 | # so we add it with a default value, then remove the default value |
110 | $temp_default_value = 1; |
111 | my(@numeric_types) = qw(decimal numeric float real int bigint smallint tinyint); |
112 | $f_tar_default = grep($_ eq $f_tar_type, @numeric_types) ? 0 : ''; |
113 | } |
114 | push @diffs_table_adds, sprintf |
115 | ( "ALTER TABLE %s ADD %s%s %s%s%s%s%s%s;", |
116 | $tar_table_name, $source_db =~ /Oracle/ ? '(' : '', |
117 | $f_tar_name, $f_tar_type, |
118 | ($f_tar_size && $f_tar_type !~ /(blob|text)$/) ? "($f_tar_size)" : '', |
119 | !defined $f_tar_default ? '' |
120 | : uc $f_tar_default eq 'NULL' ? ' DEFAULT NULL' |
121 | : uc $f_tar_default eq 'CURRENT_TIMESTAMP' ? ' DEFAULT CURRENT_TIMESTAMP' |
122 | : " DEFAULT '$f_tar_default'", |
123 | $f_tar_nullable ? '' : ' NOT NULL', |
124 | $f_tar_auto_inc ? ' AUTO_INCREMENT' : '', |
125 | $source_db =~ /Oracle/ ? ')' : '', |
126 | ); |
127 | if ( $temp_default_value ) { |
128 | undef $f_tar_default; |
129 | push @diffs_table_adds, sprintf |
130 | ( <<END |
131 | DECLARE \@defname VARCHAR(100), \@cmd VARCHAR(1000) |
132 | SET \@defname = |
133 | (SELECT name |
134 | FROM sysobjects so JOIN sysconstraints sc |
135 | ON so.id = sc.constid |
136 | WHERE object_name(so.parent_obj) = '%s' |
137 | AND so.xtype = 'D' |
138 | AND sc.colid = |
139 | (SELECT colid FROM syscolumns |
140 | WHERE id = object_id('%s') AND |
141 | name = '%s')) |
142 | SET \@cmd = 'ALTER TABLE %s DROP CONSTRAINT ' |
143 | + \@defname |
144 | EXEC(\@cmd) |
145 | END |
146 | , $tar_table_name, $tar_table_name, $f_tar_name, $tar_table_name, |
147 | ); |
148 | } |
149 | next; |
150 | } |
151 | |
152 | my $f_src_type = $src_table_field->data_type; |
153 | my $f_src_size = $src_table_field->size || ''; |
154 | my $f_src_nullable = $src_table_field->is_nullable; |
155 | my $f_src_default = $src_table_field->default_value; |
156 | my $f_src_auto_inc = $src_table_field->is_auto_increment; |
157 | if ( !$tar_table_field->equals($src_table_field, $case_insensitive) ) { |
158 | # SQLServer timestamp fields can't be altered, so we drop and add instead |
159 | if ( $source_db =~ /SQLServer/ && $f_src_type eq "timestamp" ) { |
160 | push @diffs_table_changes, "ALTER TABLE $tar_table_name DROP COLUMN $f_tar_name;"; |
161 | push @diffs_table_changes, sprintf |
162 | ( "ALTER TABLE %s ADD %s%s %s%s%s%s%s%s;", |
163 | $tar_table_name, $source_db =~ /Oracle/ ? '(' : '', |
164 | $f_tar_name, $f_tar_type, |
165 | ($f_tar_size && $f_tar_type !~ /(blob|text)$/) ? "($f_tar_size)" : '', |
166 | !defined $f_tar_default ? '' |
167 | : uc $f_tar_default eq 'NULL' ? ' DEFAULT NULL' |
168 | : uc $f_tar_default eq 'CURRENT_TIMESTAMP' ? ' DEFAULT CURRENT_TIMESTAMP' |
169 | : " DEFAULT '$f_tar_default'", |
170 | $f_tar_nullable ? '' : ' NOT NULL', |
171 | $f_tar_auto_inc ? ' AUTO_INCREMENT' : '', |
172 | $source_db =~ /Oracle/ ? ')' : '', |
173 | ); |
174 | next; |
175 | } |
176 | |
177 | my $changeText = $source_db =~ /SQLServer/ ? 'ALTER COLUMN' : |
178 | $source_db =~ /Oracle/ ? 'MODIFY (' : 'CHANGE'; |
179 | my $nullText = $f_tar_nullable ? '' : ' NOT NULL'; |
180 | $nullText = '' if $source_db =~ /Oracle/ && $f_tar_nullable == $f_src_nullable; |
181 | push @diffs_table_changes, sprintf |
182 | ( "ALTER TABLE %s %s %s%s %s%s%s%s%s%s;", |
183 | $tar_table_name, $changeText, |
184 | $f_tar_name, $source_db =~ /MySQL/ ? " $f_tar_name" : '', |
185 | $f_tar_type, ($f_tar_size && $f_tar_type !~ /(blob|text)$/) ? "($f_tar_size)" : '', |
186 | $nullText, |
187 | !defined $f_tar_default || $source_db =~ /SQLServer/ ? '' |
188 | : uc $f_tar_default eq 'NULL' ? ' DEFAULT NULL' |
189 | : uc $f_tar_default eq 'CURRENT_TIMESTAMP' ? ' DEFAULT CURRENT_TIMESTAMP' |
190 | : " DEFAULT '$f_tar_default'", |
191 | $f_tar_auto_inc ? ' AUTO_INCREMENT' : '', |
192 | $source_db =~ /Oracle/ ? ')' : '', |
193 | ); |
194 | if ( defined $f_tar_default && $source_db =~ /SQLServer/ ) { |
195 | # Adding a column with a default value for SQL Server means adding a |
196 | # constraint and setting existing NULLs to the default value |
197 | push @diffs_table_changes, sprintf |
198 | ( "ALTER TABLE %s ADD CONSTRAINT DF_%s_%s %s FOR %s;", |
199 | $tar_table_name, $tar_table_name, $f_tar_name, uc $f_tar_default eq 'NULL' ? 'DEFAULT NULL' |
200 | : uc $f_tar_default eq 'CURRENT_TIMESTAMP' ? 'DEFAULT CURRENT_TIMESTAMP' |
201 | : "DEFAULT '$f_tar_default'", $f_tar_name, |
202 | ); |
203 | push @diffs_table_changes, sprintf |
204 | ( "UPDATE %s SET %s = %s WHERE %s IS NULL;", |
205 | $tar_table_name, $f_tar_name, uc $f_tar_default eq 'NULL' ? 'NULL' |
206 | : uc $f_tar_default eq 'CURRENT_TIMESTAMP' ? 'CURRENT_TIMESTAMP' |
207 | : "'$f_tar_default'", $f_tar_name, |
208 | ); |
209 | } |
210 | } |
211 | } |
212 | |
213 | my(%checked_indices, @diffs_index_creates, @diffs_index_drops); |
214 | INDEX: |
215 | for my $i_tar ( $tar_table->get_indices ) { |
216 | for my $i_src ( $src_table->get_indices ) { |
217 | if ( $i_tar->equals($i_src, $case_insensitive) ) { |
218 | $checked_indices{$i_src} = 1; |
219 | next INDEX; |
220 | } |
221 | } |
222 | push @diffs_index_creates, sprintf |
223 | ( "CREATE %sINDEX%s ON %s (%s);", |
224 | $i_tar->type eq NORMAL ? '' : $i_tar->type." ", |
225 | $i_tar->name ? " ".$i_tar->name : '', |
226 | $tar_table_name, |
227 | join(",", $i_tar->fields), |
228 | ); |
229 | } |
230 | INDEX2: |
231 | for my $i_src ( $src_table->get_indices ) { |
232 | next if $checked_indices{$i_src}; |
233 | for my $i_tar ( $tar_table->get_indices ) { |
234 | next INDEX2 if $i_src->equals($i_tar, $case_insensitive); |
235 | } |
236 | $source_db =~ /SQLServer/ |
237 | ? push @diffs_index_drops, "DROP INDEX $tar_table_name.".$i_src->name.";" |
238 | : push @diffs_index_drops, "DROP INDEX ".$i_src->name." on $tar_table_name;"; |
239 | } |
240 | |
241 | my(%checked_constraints, @diffs_constraint_drops); |
242 | CONSTRAINT: |
243 | for my $c_tar ( $tar_table->get_constraints ) { |
244 | next if $target_db =~ /Oracle/ && |
245 | $c_tar->type eq UNIQUE && $c_tar->name =~ /^SYS_/i; |
246 | for my $c_src ( $src_table->get_constraints ) { |
247 | if ( $c_tar->equals($c_src, $case_insensitive) ) { |
248 | $checked_constraints{$c_src} = 1; |
249 | next CONSTRAINT; |
250 | } |
251 | } |
252 | push @diffs_at_end, "ALTER TABLE $tar_table_name ADD ". |
253 | constraint_to_string($c_tar, $source_db, $target_schema).";"; |
254 | } |
255 | CONSTRAINT2: |
256 | for my $c_src ( $src_table->get_constraints ) { |
99b0dca6 |
257 | next if $source_db =~ /Oracle/ && |
258 | $c_src->type eq UNIQUE && $c_src->name =~ /^SYS_/i; |
51ffe5ee |
259 | next if $checked_constraints{$c_src}; |
260 | for my $c_tar ( $tar_table->get_constraints ) { |
261 | next CONSTRAINT2 if $c_src->equals($c_tar, $case_insensitive); |
262 | } |
263 | if ( $c_src->type eq UNIQUE ) { |
264 | push @diffs_constraint_drops, "ALTER TABLE $tar_table_name DROP INDEX ". |
265 | $c_src->name.";"; |
266 | } elsif ( $source_db =~ /SQLServer/ ) { |
267 | push @diffs_constraint_drops, "ALTER TABLE $tar_table_name DROP ".$c_src->name.";"; |
268 | } else { |
269 | push @diffs_constraint_drops, "ALTER TABLE $tar_table_name DROP ".$c_src->type. |
270 | ($c_src->type eq FOREIGN_KEY ? " ".$c_src->name : '').";"; |
271 | } |
272 | } |
273 | |
274 | push @diffs, @diffs_index_drops, @diffs_constraint_drops, |
275 | @diffs_table_options, @diffs_table_adds, |
276 | @diffs_table_changes, @diffs_index_creates; |
277 | } |
278 | |
279 | for my $src_table ( $source_schema->get_tables ) { |
280 | my $src_table_name = $src_table->name; |
281 | my $tar_table = $target_schema->get_table( $src_table_name, $source_db =~ /SQLServer/ ); |
282 | |
283 | unless ( $tar_table ) { |
284 | if ( $source_db =~ /SQLServer/ ) { |
285 | for my $constraint ( $src_table->get_constraints ) { |
286 | next if $constraint->type eq PRIMARY_KEY; |
287 | push @diffs, "ALTER TABLE $src_table_name DROP ".$constraint->name.";"; |
288 | } |
289 | } |
290 | push @diffs_at_end, "DROP TABLE $src_table_name;"; |
291 | next; |
292 | } |
293 | |
294 | for my $src_table_field ( $src_table->get_fields ) { |
295 | my $f_src_name = $src_table_field->name; |
296 | my $tar_table_field = $tar_table->get_field( $f_src_name ); |
297 | unless ( $tar_table_field ) { |
298 | my $modifier = $source_db =~ /SQLServer/ ? "COLUMN " : ''; |
299 | push @diffs, "ALTER TABLE $src_table_name DROP $modifier$f_src_name;"; |
300 | } |
301 | } |
302 | } |
303 | |
304 | if ( @new_tables ) { |
305 | my $dummytr = SQL::Translator->new; |
306 | $dummytr->schema->add_table( $_ ) for @new_tables; |
307 | my $producer = $dummytr->producer( $source_db ); |
308 | unshift @diffs, $producer->( $dummytr ); |
309 | } |
310 | push(@diffs, @diffs_at_end); |
311 | |
312 | if ( @diffs ) { |
bf459ae6 |
313 | if ( $target_db !~ /^(MySQL|SQLServer|Oracle)$/ ) { |
314 | unshift(@diffs, "-- Target database $target_db is untested/unsupported!!!"); |
315 | } |
51ffe5ee |
316 | return join( "\n", |
317 | "-- Convert schema '$src_name' to '$tar_name':\n", @diffs, "\n" |
318 | ); |
319 | } |
320 | return undef; |
321 | } |
322 | |
323 | sub constraint_to_string { |
324 | my $c = shift; |
325 | my $source_db = shift; |
326 | my $schema = shift or die "No schema given"; |
327 | my @fields = $c->field_names or return ''; |
328 | |
329 | if ( $c->type eq PRIMARY_KEY ) { |
330 | if ( $source_db =~ /Oracle/ ) { |
331 | return (defined $c->name ? 'CONSTRAINT '.$c->name.' ' : '') . |
332 | 'PRIMARY KEY (' . join(', ', @fields). ')'; |
333 | } else { |
334 | return 'PRIMARY KEY (' . join(', ', @fields). ')'; |
335 | } |
336 | } |
337 | elsif ( $c->type eq UNIQUE ) { |
338 | if ( $source_db =~ /Oracle/ ) { |
339 | return (defined $c->name ? 'CONSTRAINT '.$c->name.' ' : '') . |
340 | 'UNIQUE (' . join(', ', @fields). ')'; |
341 | } else { |
342 | return 'UNIQUE '. |
343 | (defined $c->name ? $c->name.' ' : ''). |
344 | '(' . join(', ', @fields). ')'; |
345 | } |
346 | } |
347 | elsif ( $c->type eq FOREIGN_KEY ) { |
348 | my $def = join(' ', |
349 | map { $_ || () } 'CONSTRAINT', $c->name, 'FOREIGN KEY' |
350 | ); |
351 | |
352 | $def .= ' (' . join( ', ', @fields ) . ')'; |
353 | |
354 | $def .= ' REFERENCES ' . $c->reference_table; |
355 | |
356 | my @rfields = map { $_ || () } $c->reference_fields; |
357 | unless ( @rfields ) { |
358 | my $rtable_name = $c->reference_table; |
359 | if ( my $ref_table = $schema->get_table( $rtable_name ) ) { |
360 | push @rfields, $ref_table->primary_key; |
361 | } |
362 | else { |
363 | warn "Can't find reference table '$rtable_name' " . |
364 | "in schema\n"; |
365 | } |
366 | } |
367 | |
368 | if ( @rfields ) { |
369 | $def .= ' (' . join( ', ', @rfields ) . ')'; |
370 | } |
371 | else { |
372 | warn "FK constraint on " . 'some table' . '.' . |
373 | join('', @fields) . " has no reference fields\n"; |
374 | } |
375 | |
376 | if ( $c->match_type ) { |
377 | $def .= ' MATCH ' . |
378 | ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL'; |
379 | } |
380 | |
381 | if ( $c->on_delete ) { |
382 | $def .= ' ON DELETE '.join( ' ', $c->on_delete ); |
383 | } |
384 | |
385 | if ( $c->on_update ) { |
386 | $def .= ' ON UPDATE '.join( ' ', $c->on_update ); |
387 | } |
388 | |
389 | return $def; |
390 | } |
391 | } |
392 | |
393 | 1; |