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1 | package SQL::Translator::Producer::DB2; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: DB2.pm,v 1.3 2006-06-07 16:02:54 schiffbruechige Exp $ |
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5 | # ------------------------------------------------------------------- |
6 | # Copyright (C) 2002-4 SQLFairy Authors |
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 | # ------------------------------------------------------------------- |
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22 | =head1 NAME |
23 | |
24 | SQL::Translator::Producer::DB2 - DB2 SQL producer |
25 | |
26 | =head1 SYNOPSIS |
27 | |
28 | use SQL::Translator; |
29 | |
30 | my $t = SQL::Translator->new( parser => '...', producer => 'DB2' ); |
31 | print $translator->translate( $file ); |
32 | |
33 | =head1 DESCRIPTION |
34 | |
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35 | Creates an SQL DDL suitable for DB2. |
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36 | |
37 | =cut |
38 | |
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39 | use warnings; |
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40 | use strict; |
41 | use vars qw[ $VERSION $DEBUG $WARN ]; |
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42 | $VERSION = sprintf "%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/; |
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43 | $DEBUG = 0 unless defined $DEBUG; |
44 | |
45 | use SQL::Translator::Schema::Constants; |
46 | use SQL::Translator::Utils qw(header_comment); |
47 | |
48 | |
49 | # http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/ad/r0006844.htm |
50 | |
51 | # This is a terrible WTDI, each Parser should parse down to some standard set |
52 | # of SQL data types, with field->extra entries being used to convert back to |
53 | # weird types like "polygon" if needed (IMO anyway) |
54 | |
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55 | my %dt_translate = ( ); |
56 | BEGIN { |
57 | %dt_translate = ( |
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58 | # |
59 | # MySQL types |
60 | # |
61 | int => 'integer', |
62 | mediumint => 'integer', |
63 | tinyint => 'smallint', |
64 | char => 'char', |
65 | tinyblob => 'blob', |
66 | mediumblob => 'blob', |
67 | longblob => 'long varchar for bit data', |
68 | tinytext => 'varchar', |
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69 | text => 'varchar', |
70 | longtext => 'varchar', |
71 | mediumtext => 'varchar', |
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72 | enum => 'varchar', |
73 | set => 'varchar', |
74 | date => 'date', |
75 | datetime => 'timestamp', |
76 | time => 'time', |
77 | year => 'date', |
78 | |
79 | # |
80 | # PostgreSQL types |
81 | # |
82 | 'double precision' => 'double', |
83 | serial => 'integer', |
84 | bigserial => 'integer', |
85 | money => 'double', |
86 | character => 'char', |
87 | 'character varying' => 'varchar', |
88 | bytea => 'BLOB', |
89 | interval => 'integer', |
90 | boolean => 'smallint', |
91 | point => 'integer', |
92 | line => 'integer', |
93 | lseg => 'integer', |
94 | box => 'integer', |
95 | path => 'integer', |
96 | polygon => 'integer', |
97 | circle => 'integer', |
98 | cidr => 'integer', |
99 | inet => 'varchar', |
100 | macaddr => 'varchar', |
101 | bit => 'number', |
102 | 'bit varying' => 'number', |
103 | |
104 | # |
105 | # DB types |
106 | # |
107 | number => 'integer', |
108 | varchar2 => 'varchar', |
109 | long => 'clob', |
110 | ); |
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111 | } |
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112 | |
113 | my %db2_reserved = map { $_ => 1} qw/ |
114 | ADD DETERMINISTIC LEAVE RESTART |
115 | AFTER DISALLOW LEFT RESTRICT |
116 | ALIAS DISCONNECT LIKE RESULT |
117 | ALL DISTINCT LINKTYPE RESULT_SET_LOCATOR |
118 | ALLOCATE DO LOCAL RETURN |
119 | ALLOW DOUBLE LOCALE RETURNS |
120 | ALTER DROP LOCATOR REVOKE |
121 | AND DSNHATTR LOCATORS RIGHT |
122 | ANY DSSIZE LOCK ROLLBACK |
123 | APPLICATION DYNAMIC LOCKMAX ROUTINE |
124 | AS EACH LOCKSIZE ROW |
125 | ASSOCIATE EDITPROC LONG ROWS |
126 | ASUTIME ELSE LOOP RRN |
127 | AUDIT ELSEIF MAXVALUE RUN |
128 | AUTHORIZATION ENCODING MICROSECOND SAVEPOINT |
129 | AUX END MICROSECONDS SCHEMA |
130 | AUXILIARY END-EXEC MINUTE SCRATCHPAD |
131 | BEFORE END-EXEC1 MINUTES SECOND |
132 | BEGIN ERASE MINVALUE SECONDS |
133 | BETWEEN ESCAPE MODE SECQTY |
134 | BINARY EXCEPT MODIFIES SECURITY |
135 | BUFFERPOOL EXCEPTION MONTH SELECT |
136 | BY EXCLUDING MONTHS SENSITIVE |
137 | CACHE EXECUTE NEW SET |
138 | CALL EXISTS NEW_TABLE SIGNAL |
139 | CALLED EXIT NO SIMPLE |
140 | CAPTURE EXTERNAL NOCACHE SOME |
141 | CARDINALITY FENCED NOCYCLE SOURCE |
142 | CASCADED FETCH NODENAME SPECIFIC |
143 | CASE FIELDPROC NODENUMBER SQL |
144 | CAST FILE NOMAXVALUE SQLID |
145 | CCSID FINAL NOMINVALUE STANDARD |
146 | CHAR FOR NOORDER START |
147 | CHARACTER FOREIGN NOT STATIC |
148 | CHECK FREE NULL STAY |
149 | CLOSE FROM NULLS STOGROUP |
150 | CLUSTER FULL NUMPARTS STORES |
151 | COLLECTION FUNCTION OBID STYLE |
152 | COLLID GENERAL OF SUBPAGES |
153 | COLUMN GENERATED OLD SUBSTRING |
154 | COMMENT GET OLD_TABLE SYNONYM |
155 | COMMIT GLOBAL ON SYSFUN |
156 | CONCAT GO OPEN SYSIBM |
157 | CONDITION GOTO OPTIMIZATION SYSPROC |
158 | CONNECT GRANT OPTIMIZE SYSTEM |
159 | CONNECTION GRAPHIC OPTION TABLE |
160 | CONSTRAINT GROUP OR TABLESPACE |
161 | CONTAINS HANDLER ORDER THEN |
162 | CONTINUE HAVING OUT TO |
163 | COUNT HOLD OUTER TRANSACTION |
164 | COUNT_BIG HOUR OVERRIDING TRIGGER |
165 | CREATE HOURS PACKAGE TRIM |
166 | CROSS IDENTITY PARAMETER TYPE |
167 | CURRENT IF PART UNDO |
168 | CURRENT_DATE IMMEDIATE PARTITION UNION |
169 | CURRENT_LC_CTYPE IN PATH UNIQUE |
170 | CURRENT_PATH INCLUDING PIECESIZE UNTIL |
171 | CURRENT_SERVER INCREMENT PLAN UPDATE |
172 | CURRENT_TIME INDEX POSITION USAGE |
173 | CURRENT_TIMESTAMP INDICATOR PRECISION USER |
174 | CURRENT_TIMEZONE INHERIT PREPARE USING |
175 | CURRENT_USER INNER PRIMARY VALIDPROC |
176 | CURSOR INOUT PRIQTY VALUES |
177 | CYCLE INSENSITIVE PRIVILEGES VARIABLE |
178 | DATA INSERT PROCEDURE VARIANT |
179 | DATABASE INTEGRITY PROGRAM VCAT |
180 | DAY INTO PSID VIEW |
181 | DAYS IS QUERYNO VOLUMES |
182 | DB2GENERAL ISOBID READ WHEN |
183 | DB2GENRL ISOLATION READS WHERE |
184 | DB2SQL ITERATE RECOVERY WHILE |
185 | DBINFO JAR REFERENCES WITH |
186 | DECLARE JAVA REFERENCING WLM |
187 | DEFAULT JOIN RELEASE WRITE |
188 | DEFAULTS KEY RENAME YEAR |
189 | DEFINITION LABEL REPEAT YEARS |
190 | DELETE LANGUAGE RESET |
191 | DESCRIPTOR LC_CTYPE RESIGNAL |
192 | /; |
193 | |
194 | #------------------------------------------------------------------------------ |
195 | |
196 | sub produce |
197 | { |
198 | my ($translator) = @_; |
199 | $DEBUG = $translator->debug; |
200 | $WARN = $translator->show_warnings; |
201 | my $no_comments = $translator->no_comments; |
202 | my $add_drop_table = $translator->add_drop_table; |
203 | my $schema = $translator->schema; |
204 | my $output = ''; |
205 | my $indent = ' '; |
206 | |
207 | $output .= header_comment unless($no_comments); |
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208 | my (@table_defs, @index_defs); |
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209 | foreach my $table ($schema->get_tables) |
210 | { |
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211 | push @table_defs, 'DROP TABLE ' . $table->name . ";" if $add_drop_table; |
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212 | push @table_defs, create_table($table, { |
213 | no_comments => $no_comments}); |
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214 | |
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215 | foreach my $index ($table->get_indices) |
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216 | { |
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217 | push @index_defs, create_index($index); |
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218 | } |
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219 | |
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220 | } |
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221 | my (@view_defs); |
222 | foreach my $view ( $schema->get_views ) |
223 | { |
224 | push @view_defs, create_view($view); |
225 | } |
226 | my (@trigger_defs); |
227 | foreach my $trigger ( $schema->get_triggers ) |
228 | { |
229 | push @trigger_defs, create_trigger($trigger); |
230 | } |
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231 | |
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232 | return wantarray ? (@table_defs, @index_defs, @view_defs, @trigger_defs) : |
233 | $output . join("\n\n", @table_defs, @index_defs, @view_defs, @trigger_defs) . "\n"; |
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234 | } |
235 | |
236 | { my %objnames; |
237 | |
238 | sub check_name |
239 | { |
240 | my ($name, $type, $length) = @_; |
241 | |
242 | my $newname = $name; |
243 | if(length($name) > $length) ## Maximum table name length is 18 |
244 | { |
245 | warn "Table name $name is longer than $length characters, truncated" if $WARN; |
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246 | # if(grep {$_ eq substr($name, 0, $length) } |
247 | # values(%{$objnames{$type}})) |
248 | # { |
249 | # die "Got multiple matching table names when truncated"; |
250 | # } |
251 | # $objnames{$type}{$name} = substr($name, 0,$length); |
252 | # $newname = $objnames{$type}{$name}; |
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253 | } |
254 | |
255 | if($db2_reserved{uc($newname)}) |
256 | { |
257 | warn "$newname is a reserved word in DB2!" if $WARN; |
258 | } |
259 | |
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260 | # return sprintf("%-*s", $length-5, $newname); |
261 | return $newname; |
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262 | } |
263 | } |
264 | |
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265 | sub create_table |
266 | { |
267 | my ($table, $options) = @_; |
268 | |
269 | my $table_name = check_name($table->name, 'tables', 128); |
270 | # this limit is 18 in older DB2s ! (<= 8) |
271 | |
272 | my (@field_defs, @comments); |
273 | push @comments, "--\n-- Table: $table_name\n--" unless $options->{no_comments}; |
274 | foreach my $field ($table->get_fields) |
275 | { |
276 | push @field_defs, create_field($field); |
277 | } |
278 | my @con_defs; |
279 | foreach my $con ($table->get_constraints) |
280 | { |
281 | push @con_defs, create_constraint($con); |
282 | } |
283 | my $pkey = join(", ", $table->primary_key()->fields); |
284 | |
285 | my $tablespace = $table->extra()->{'TABLESPACE'} || ''; |
286 | my $table_def = "CREATE TABLE $table_name (\n"; |
287 | $table_def .= join (",\n", @field_defs); |
288 | $table_def .= join (",\n", @con_defs); |
289 | $table_def .= ",\n PRIMARY KEY($pkey)"; |
290 | $table_def .= "\n)"; |
291 | $table_def .= $tablespace ? "IN $tablespace;" : ';'; |
292 | |
293 | return $table_def; |
294 | } |
295 | |
296 | sub create_field |
297 | { |
298 | my ($field) = @_; |
299 | |
300 | my $field_name = check_name($field->name, 'fields', 30); |
301 | # use Data::Dumper; |
302 | # print Dumper(\%dt_translate); |
303 | # print $field->data_type, " ", $dt_translate{lc($field->data_type)}, "\n"; |
304 | my $data_type = uc($dt_translate{lc($field->data_type)} || $field->data_type); |
305 | my $size = $field->size(); |
306 | |
307 | my $field_def = "$field_name $data_type"; |
308 | $field_def .= $field->is_auto_increment ? |
309 | ' GENERATED BY DEFAULT AS IDENTITY' : ''; |
310 | $field_def .= $data_type =~ /CHAR/i ? "(${size})" : ''; |
311 | $field_def .= !$field->is_nullable ? ' NOT NULL':''; |
312 | # $field_def .= $field->is_primary_key ? ' PRIMARY KEY':''; |
313 | $field_def .= !defined $field->default_value ? '' : |
314 | $field->default_value =~ /current( |_)timestamp/i || |
315 | $field->default_value =~ /\Qnow()\E/i ? |
316 | 'DEFAULT CURRENT TIMESTAMP' : defined $field->default_value ? |
317 | (" DEFAULT '" . $field->default_value . "'") : ''; |
318 | |
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319 | return $field_def; |
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320 | } |
321 | |
322 | sub create_index |
323 | { |
324 | my ($index) = @_; |
325 | |
326 | my $out = sprintf('CREATE %sINDEX %s ON %s ( %s );', |
327 | $index->type() =~ /^UNIQUE$/i ? 'UNIQUE' : '', |
328 | $index->name, |
329 | $index->table->name, |
330 | join(', ', $index->fields) ); |
331 | |
332 | return $out; |
333 | } |
334 | |
335 | sub create_constraint |
336 | { |
337 | my ($constraint) = @_; |
338 | |
339 | return '' if($constraint->type =~ /^PRIMARY(_|\s)KEY$/i); |
340 | |
341 | my $ctype = $constraint->type =~ /^PRIMARY(_|\s)KEY$/i ? 'PRIMARY KEY' : |
342 | $constraint->type =~ /^UNIQUE$/i ? 'UNIQUE' : |
343 | $constraint->type =~ /^CHECK_C$/i ? 'CHECK' : |
344 | $constraint->type =~ /^FOREIGN_KEY$/i ? 'FOREIGN KEY' : ''; |
345 | |
346 | my $expr = $constraint->type =~ /^CHECK_C$/i ? $constraint->expression : |
347 | ''; |
348 | my $ref = $constraint->type =~ /^FOREIGN_KEY$/i ? ('REFERENCES ' . $constraint->reference_table . '(' . join(', ', $constraint->reference_fields) . ')') : ''; |
349 | my $update = $constraint->on_update ? $constraint->on_update : ''; |
350 | my $delete = $constraint->on_delete ? $constraint->on_delete : ''; |
351 | |
352 | my $out = sprintf('%s %s %s %s %s %s', |
353 | $constraint->name ? ('CONSTRAINT ' . $constraint->name) : '', |
354 | $ctype, |
355 | '(' . join (', ', $constraint->fields) . ')', |
356 | $expr ? $expr : $ref, |
357 | $update, |
358 | $delete); |
359 | |
360 | |
361 | return $out; |
362 | |
363 | } |
364 | |
365 | sub create_view |
366 | { |
367 | my ($view) = @_; |
368 | |
369 | my $out = sprintf("CREATE VIEW %s AS\n%s;", |
370 | $view->name, |
371 | $view->sql); |
372 | |
373 | return $out; |
374 | } |
375 | |
376 | sub create_trigger |
377 | { |
378 | my ($trigger) = @_; |
379 | # create: CREATE TRIGGER trigger_name before type /ON/i table_name reference_b(?) /FOR EACH ROW/i 'MODE DB2SQL' triggered_action |
380 | |
381 | my $out = sprintf('CREATE TRIGGER %s %s %s ON %s %s %s MODE DB2SQL %s', |
382 | $trigger->name, |
383 | $trigger->perform_action_when || 'AFTER', |
384 | $trigger->database_event =~ /update_on/i ? |
385 | ('UPDATE OF '. join(', ', $trigger->fields)) : |
386 | $trigger->database_event || 'UPDATE', |
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387 | $trigger->table->name, |
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388 | $trigger->extra->{reference} || 'REFERENCING OLD AS oldrow NEW AS newrow', |
389 | $trigger->extra->{granularity} || 'FOR EACH ROW', |
390 | $trigger->action ); |
391 | |
392 | return $out; |
393 | |
394 | } |
395 | |
396 | sub alter_field |
397 | { |
398 | my ($from_field, $to_field) = @_; |
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399 | |
400 | my $data_type = uc($dt_translate{lc($to_field->data_type)} || $to_field->data_type); |
401 | |
402 | my $size = $to_field->size(); |
403 | $data_type .= $data_type =~ /CHAR/i ? "(${size})" : ''; |
404 | |
405 | # DB2 will only allow changing of varchar/vargraphic datatypes |
406 | # to extend their lengths. Or changing of text types to other |
407 | # texttypes, and numeric types to larger numeric types. (v8) |
408 | # We can also drop/add keys, checks and constraints, but not |
409 | # columns !? |
410 | |
411 | my $out = sprintf('ALTER TABLE %s ALTER %s SET DATATYPE %s', |
412 | $to_field->table->name, |
413 | $to_field->name, |
414 | $data_type); |
415 | |
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416 | } |
417 | |
418 | sub add_field |
419 | { |
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420 | my ($new_field) = @_; |
421 | |
422 | my $out = sprintf('ALTER TABLE %s ADD COLUMN %s', |
423 | $new_field->table->name, |
424 | create_field($new_field)); |
425 | |
426 | return $out; |
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427 | } |
428 | |
429 | sub drop_field |
430 | { |
431 | my ($field) = @_; |
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432 | |
433 | return ''; |
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434 | } |
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435 | 1; |