1 package SQL::Translator::Producer::DB2;
3 # -------------------------------------------------------------------
4 # Copyright (C) 2002-2009 SQLFairy Authors
6 # This program is free software; you can redistribute it and/or
7 # modify it under the terms of the GNU General Public License as
8 # published by the Free Software Foundation; version 2.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 # -------------------------------------------------------------------
22 SQL::Translator::Producer::DB2 - DB2 SQL producer
28 my $t = SQL::Translator->new( parser => '...', producer => 'DB2' );
29 print $translator->translate( $file );
33 Creates an SQL DDL suitable for DB2.
39 use vars qw[ $VERSION $DEBUG $WARN ];
41 $DEBUG = 0 unless defined $DEBUG;
43 use SQL::Translator::Schema::Constants;
44 use SQL::Translator::Utils qw(header_comment);
47 # http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/ad/r0006844.htm
49 # This is a terrible WTDI, each Parser should parse down to some standard set
50 # of SQL data types, with field->extra entries being used to convert back to
51 # weird types like "polygon" if needed (IMO anyway)
60 mediumint => 'integer',
61 tinyint => 'smallint',
65 longblob => 'long varchar for bit data',
66 tinytext => 'varchar',
68 longtext => 'varchar',
69 mediumtext => 'varchar',
73 datetime => 'timestamp',
80 'double precision' => 'double',
82 bigserial => 'integer',
85 'character varying' => 'varchar',
87 interval => 'integer',
88 boolean => 'smallint',
100 'bit varying' => 'number',
106 varchar2 => 'varchar',
111 my %db2_reserved = map { $_ => 1} qw/
112 ADD DETERMINISTIC LEAVE RESTART
113 AFTER DISALLOW LEFT RESTRICT
114 ALIAS DISCONNECT LIKE RESULT
115 ALL DISTINCT LINKTYPE RESULT_SET_LOCATOR
116 ALLOCATE DO LOCAL RETURN
117 ALLOW DOUBLE LOCALE RETURNS
118 ALTER DROP LOCATOR REVOKE
119 AND DSNHATTR LOCATORS RIGHT
120 ANY DSSIZE LOCK ROLLBACK
121 APPLICATION DYNAMIC LOCKMAX ROUTINE
123 ASSOCIATE EDITPROC LONG ROWS
124 ASUTIME ELSE LOOP RRN
125 AUDIT ELSEIF MAXVALUE RUN
126 AUTHORIZATION ENCODING MICROSECOND SAVEPOINT
127 AUX END MICROSECONDS SCHEMA
128 AUXILIARY END-EXEC MINUTE SCRATCHPAD
129 BEFORE END-EXEC1 MINUTES SECOND
130 BEGIN ERASE MINVALUE SECONDS
131 BETWEEN ESCAPE MODE SECQTY
132 BINARY EXCEPT MODIFIES SECURITY
133 BUFFERPOOL EXCEPTION MONTH SELECT
134 BY EXCLUDING MONTHS SENSITIVE
135 CACHE EXECUTE NEW SET
136 CALL EXISTS NEW_TABLE SIGNAL
137 CALLED EXIT NO SIMPLE
138 CAPTURE EXTERNAL NOCACHE SOME
139 CARDINALITY FENCED NOCYCLE SOURCE
140 CASCADED FETCH NODENAME SPECIFIC
141 CASE FIELDPROC NODENUMBER SQL
142 CAST FILE NOMAXVALUE SQLID
143 CCSID FINAL NOMINVALUE STANDARD
144 CHAR FOR NOORDER START
145 CHARACTER FOREIGN NOT STATIC
147 CLOSE FROM NULLS STOGROUP
148 CLUSTER FULL NUMPARTS STORES
149 COLLECTION FUNCTION OBID STYLE
150 COLLID GENERAL OF SUBPAGES
151 COLUMN GENERATED OLD SUBSTRING
152 COMMENT GET OLD_TABLE SYNONYM
153 COMMIT GLOBAL ON SYSFUN
154 CONCAT GO OPEN SYSIBM
155 CONDITION GOTO OPTIMIZATION SYSPROC
156 CONNECT GRANT OPTIMIZE SYSTEM
157 CONNECTION GRAPHIC OPTION TABLE
158 CONSTRAINT GROUP OR TABLESPACE
159 CONTAINS HANDLER ORDER THEN
160 CONTINUE HAVING OUT TO
161 COUNT HOLD OUTER TRANSACTION
162 COUNT_BIG HOUR OVERRIDING TRIGGER
163 CREATE HOURS PACKAGE TRIM
164 CROSS IDENTITY PARAMETER TYPE
166 CURRENT_DATE IMMEDIATE PARTITION UNION
167 CURRENT_LC_CTYPE IN PATH UNIQUE
168 CURRENT_PATH INCLUDING PIECESIZE UNTIL
169 CURRENT_SERVER INCREMENT PLAN UPDATE
170 CURRENT_TIME INDEX POSITION USAGE
171 CURRENT_TIMESTAMP INDICATOR PRECISION USER
172 CURRENT_TIMEZONE INHERIT PREPARE USING
173 CURRENT_USER INNER PRIMARY VALIDPROC
174 CURSOR INOUT PRIQTY VALUES
175 CYCLE INSENSITIVE PRIVILEGES VARIABLE
176 DATA INSERT PROCEDURE VARIANT
177 DATABASE INTEGRITY PROGRAM VCAT
179 DAYS IS QUERYNO VOLUMES
180 DB2GENERAL ISOBID READ WHEN
181 DB2GENRL ISOLATION READS WHERE
182 DB2SQL ITERATE RECOVERY WHILE
183 DBINFO JAR REFERENCES WITH
184 DECLARE JAVA REFERENCING WLM
185 DEFAULT JOIN RELEASE WRITE
186 DEFAULTS KEY RENAME YEAR
187 DEFINITION LABEL REPEAT YEARS
188 DELETE LANGUAGE RESET
189 DESCRIPTOR LC_CTYPE RESIGNAL
194 my ($translator) = @_;
195 $DEBUG = $translator->debug;
196 $WARN = $translator->show_warnings;
197 my $no_comments = $translator->no_comments;
198 my $add_drop_table = $translator->add_drop_table;
199 my $schema = $translator->schema;
203 $output .= header_comment unless($no_comments);
204 my (@table_defs, @fks, @index_defs);
205 foreach my $table ($schema->get_tables)
207 push @table_defs, 'DROP TABLE ' . $table->name . ";" if $add_drop_table;
208 my ($table_def, $fks) = create_table($table, {
209 no_comments => $no_comments});
210 push @table_defs, $table_def;
213 foreach my $index ($table->get_indices)
215 push @index_defs, create_index($index);
220 foreach my $view ( $schema->get_views )
222 push @view_defs, create_view($view);
225 foreach my $trigger ( $schema->get_triggers )
227 push @trigger_defs, create_trigger($trigger);
230 return wantarray ? (@table_defs, @fks, @index_defs, @view_defs, @trigger_defs) :
231 $output . join("\n\n", @table_defs, @fks, @index_defs, @view_defs, @trigger_defs) . "\n";
238 my ($name, $type, $length) = @_;
241 if(length($name) > $length) ## Maximum table name length is 18
243 warn "Table name $name is longer than $length characters, truncated" if $WARN;
244 # if(grep {$_ eq substr($name, 0, $length) }
245 # values(%{$objnames{$type}}))
247 # die "Got multiple matching table names when truncated";
249 # $objnames{$type}{$name} = substr($name, 0,$length);
250 # $newname = $objnames{$type}{$name};
253 if($db2_reserved{uc($newname)})
255 warn "$newname is a reserved word in DB2!" if $WARN;
258 # return sprintf("%-*s", $length-5, $newname);
265 my ($table, $options) = @_;
267 my $table_name = check_name($table->name, 'tables', 128);
268 # this limit is 18 in older DB2s ! (<= 8)
270 my (@field_defs, @comments);
271 push @comments, "--\n-- Table: $table_name\n--" unless $options->{no_comments};
272 foreach my $field ($table->get_fields)
274 push @field_defs, create_field($field);
276 my (@con_defs, @fks);
277 foreach my $con ($table->get_constraints)
279 my ($cdefs, $fks) = create_constraint($con);
280 push @con_defs, @$cdefs;
284 my $tablespace = $table->extra()->{'TABLESPACE'} || '';
285 my $table_def = "CREATE TABLE $table_name (\n";
286 $table_def .= join (",\n", map { " $_" } @field_defs, @con_defs);
288 $table_def .= $tablespace ? "IN $tablespace;" : ';';
290 return $table_def, \@fks;
297 my $field_name = check_name($field->name, 'fields', 30);
299 # print Dumper(\%dt_translate);
300 # print $field->data_type, " ", $dt_translate{lc($field->data_type)}, "\n";
301 my $data_type = uc($dt_translate{lc($field->data_type)} || $field->data_type);
302 my $size = $field->size();
304 my $field_def = "$field_name $data_type";
305 $field_def .= $field->is_auto_increment ?
306 ' GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1)' : '';
307 $field_def .= $data_type =~ /(CHAR|CLOB|NUMERIC|DECIMAL)/i ? "(${size})" : '';
308 $field_def .= !$field->is_nullable ? ' NOT NULL':'';
309 # $field_def .= $field->is_primary_key ? ' PRIMARY KEY':'';
310 $field_def .= !defined $field->default_value ? '' :
311 $field->default_value =~ /current( |_)timestamp/i ||
312 $field->default_value =~ /\Qnow()\E/i ?
313 ' DEFAULT CURRENT TIMESTAMP' : defined $field->default_value ?
314 (" DEFAULT " . ($data_type =~ /(INT|DOUBLE)/i ?
315 $field->default_value : "'" . $field->default_value . "'")
325 my $out = sprintf('CREATE %sINDEX %s ON %s ( %s );',
326 $index->type() =~ /^UNIQUE$/i ? 'UNIQUE' : '',
329 join(', ', $index->fields) );
334 sub create_constraint
336 my ($constraint) = @_;
338 my (@con_defs, @fks);
340 my $ctype = $constraint->type =~ /^PRIMARY(_|\s)KEY$/i ? 'PRIMARY KEY' :
341 $constraint->type =~ /^UNIQUE$/i ? 'UNIQUE' :
342 $constraint->type =~ /^CHECK_C$/i ? 'CHECK' :
343 $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? 'FOREIGN KEY' : '';
345 my $expr = $constraint->type =~ /^CHECK_C$/i ? $constraint->expression :
347 my $ref = $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? ('REFERENCES ' . $constraint->reference_table . '(' . join(', ', $constraint->reference_fields) . ')') : '';
348 my $update = $constraint->on_update ? $constraint->on_update : '';
349 my $delete = $constraint->on_delete ? $constraint->on_delete : '';
351 my $out = join(' ', grep { $_ }
352 $constraint->name ? ('CONSTRAINT ' . $constraint->name) : '',
354 '(' . join (', ', $constraint->fields) . ')',
355 $expr ? $expr : $ref,
358 if ($constraint->type eq FOREIGN_KEY) {
359 my $table_name = $constraint->table->name;
360 $out = "ALTER TABLE $table_name ADD $out;";
364 push @con_defs, $out;
367 return \@con_defs, \@fks;
375 my $out = sprintf("CREATE VIEW %s AS\n%s;",
385 # create: CREATE TRIGGER trigger_name before type /ON/i table_name reference_b(?) /FOR EACH ROW/i 'MODE DB2SQL' triggered_action
387 my $db_events = join ', ', $trigger->database_events;
388 my $out = sprintf('CREATE TRIGGER %s %s %s ON %s %s %s MODE DB2SQL %s',
390 $trigger->perform_action_when || 'AFTER',
391 $db_events =~ /update_on/i ?
392 ('UPDATE OF '. join(', ', $trigger->fields)) :
393 $db_events || 'UPDATE',
394 $trigger->table->name,
395 $trigger->extra->{reference} || 'REFERENCING OLD AS oldrow NEW AS newrow',
396 $trigger->extra->{granularity} || 'FOR EACH ROW',
405 my ($from_field, $to_field) = @_;
407 my $data_type = uc($dt_translate{lc($to_field->data_type)} || $to_field->data_type);
409 my $size = $to_field->size();
410 $data_type .= $data_type =~ /CHAR/i ? "(${size})" : '';
412 # DB2 will only allow changing of varchar/vargraphic datatypes
413 # to extend their lengths. Or changing of text types to other
414 # texttypes, and numeric types to larger numeric types. (v8)
415 # We can also drop/add keys, checks and constraints, but not
418 my $out = sprintf('ALTER TABLE %s ALTER %s SET DATATYPE %s',
419 $to_field->table->name,
427 my ($new_field) = @_;
429 my $out = sprintf('ALTER TABLE %s ADD COLUMN %s',
430 $new_field->table->name,
431 create_field($new_field));