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1 | package SQL::Translator::Producer::DB2; |
2 | |
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3 | =head1 NAME |
4 | |
5 | SQL::Translator::Producer::DB2 - DB2 SQL producer |
6 | |
7 | =head1 SYNOPSIS |
8 | |
9 | use SQL::Translator; |
10 | |
11 | my $t = SQL::Translator->new( parser => '...', producer => 'DB2' ); |
12 | print $translator->translate( $file ); |
13 | |
14 | =head1 DESCRIPTION |
15 | |
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16 | Creates an SQL DDL suitable for DB2. |
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17 | |
18 | =cut |
19 | |
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20 | use warnings; |
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21 | use strict; |
f27f9229 |
22 | use warnings; |
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23 | our ( $DEBUG, $WARN ); |
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24 | our $VERSION = '1.60'; |
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25 | $DEBUG = 0 unless defined $DEBUG; |
26 | |
27 | use SQL::Translator::Schema::Constants; |
28 | use SQL::Translator::Utils qw(header_comment); |
29 | |
30 | |
31 | # http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/ad/r0006844.htm |
32 | |
33 | # This is a terrible WTDI, each Parser should parse down to some standard set |
34 | # of SQL data types, with field->extra entries being used to convert back to |
35 | # weird types like "polygon" if needed (IMO anyway) |
36 | |
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37 | my %dt_translate; |
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38 | BEGIN { |
39 | %dt_translate = ( |
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40 | # |
41 | # MySQL types |
42 | # |
43 | int => 'integer', |
44 | mediumint => 'integer', |
45 | tinyint => 'smallint', |
46 | char => 'char', |
47 | tinyblob => 'blob', |
48 | mediumblob => 'blob', |
49 | longblob => 'long varchar for bit data', |
50 | tinytext => 'varchar', |
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51 | text => 'varchar', |
52 | longtext => 'varchar', |
53 | mediumtext => 'varchar', |
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54 | enum => 'varchar', |
55 | set => 'varchar', |
56 | date => 'date', |
57 | datetime => 'timestamp', |
58 | time => 'time', |
59 | year => 'date', |
60 | |
61 | # |
62 | # PostgreSQL types |
63 | # |
64 | 'double precision' => 'double', |
65 | serial => 'integer', |
66 | bigserial => 'integer', |
67 | money => 'double', |
68 | character => 'char', |
69 | 'character varying' => 'varchar', |
70 | bytea => 'BLOB', |
71 | interval => 'integer', |
72 | boolean => 'smallint', |
73 | point => 'integer', |
74 | line => 'integer', |
75 | lseg => 'integer', |
76 | box => 'integer', |
77 | path => 'integer', |
78 | polygon => 'integer', |
79 | circle => 'integer', |
80 | cidr => 'integer', |
81 | inet => 'varchar', |
82 | macaddr => 'varchar', |
83 | bit => 'number', |
84 | 'bit varying' => 'number', |
85 | |
86 | # |
87 | # DB types |
88 | # |
89 | number => 'integer', |
90 | varchar2 => 'varchar', |
91 | long => 'clob', |
92 | ); |
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93 | } |
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94 | |
95 | my %db2_reserved = map { $_ => 1} qw/ |
96 | ADD DETERMINISTIC LEAVE RESTART |
97 | AFTER DISALLOW LEFT RESTRICT |
98 | ALIAS DISCONNECT LIKE RESULT |
99 | ALL DISTINCT LINKTYPE RESULT_SET_LOCATOR |
100 | ALLOCATE DO LOCAL RETURN |
101 | ALLOW DOUBLE LOCALE RETURNS |
102 | ALTER DROP LOCATOR REVOKE |
103 | AND DSNHATTR LOCATORS RIGHT |
104 | ANY DSSIZE LOCK ROLLBACK |
105 | APPLICATION DYNAMIC LOCKMAX ROUTINE |
106 | AS EACH LOCKSIZE ROW |
107 | ASSOCIATE EDITPROC LONG ROWS |
108 | ASUTIME ELSE LOOP RRN |
109 | AUDIT ELSEIF MAXVALUE RUN |
110 | AUTHORIZATION ENCODING MICROSECOND SAVEPOINT |
111 | AUX END MICROSECONDS SCHEMA |
112 | AUXILIARY END-EXEC MINUTE SCRATCHPAD |
113 | BEFORE END-EXEC1 MINUTES SECOND |
114 | BEGIN ERASE MINVALUE SECONDS |
115 | BETWEEN ESCAPE MODE SECQTY |
116 | BINARY EXCEPT MODIFIES SECURITY |
117 | BUFFERPOOL EXCEPTION MONTH SELECT |
118 | BY EXCLUDING MONTHS SENSITIVE |
119 | CACHE EXECUTE NEW SET |
120 | CALL EXISTS NEW_TABLE SIGNAL |
121 | CALLED EXIT NO SIMPLE |
122 | CAPTURE EXTERNAL NOCACHE SOME |
123 | CARDINALITY FENCED NOCYCLE SOURCE |
124 | CASCADED FETCH NODENAME SPECIFIC |
125 | CASE FIELDPROC NODENUMBER SQL |
126 | CAST FILE NOMAXVALUE SQLID |
127 | CCSID FINAL NOMINVALUE STANDARD |
128 | CHAR FOR NOORDER START |
129 | CHARACTER FOREIGN NOT STATIC |
130 | CHECK FREE NULL STAY |
131 | CLOSE FROM NULLS STOGROUP |
132 | CLUSTER FULL NUMPARTS STORES |
133 | COLLECTION FUNCTION OBID STYLE |
134 | COLLID GENERAL OF SUBPAGES |
135 | COLUMN GENERATED OLD SUBSTRING |
136 | COMMENT GET OLD_TABLE SYNONYM |
137 | COMMIT GLOBAL ON SYSFUN |
138 | CONCAT GO OPEN SYSIBM |
139 | CONDITION GOTO OPTIMIZATION SYSPROC |
140 | CONNECT GRANT OPTIMIZE SYSTEM |
141 | CONNECTION GRAPHIC OPTION TABLE |
142 | CONSTRAINT GROUP OR TABLESPACE |
143 | CONTAINS HANDLER ORDER THEN |
144 | CONTINUE HAVING OUT TO |
145 | COUNT HOLD OUTER TRANSACTION |
146 | COUNT_BIG HOUR OVERRIDING TRIGGER |
147 | CREATE HOURS PACKAGE TRIM |
148 | CROSS IDENTITY PARAMETER TYPE |
149 | CURRENT IF PART UNDO |
150 | CURRENT_DATE IMMEDIATE PARTITION UNION |
151 | CURRENT_LC_CTYPE IN PATH UNIQUE |
152 | CURRENT_PATH INCLUDING PIECESIZE UNTIL |
153 | CURRENT_SERVER INCREMENT PLAN UPDATE |
154 | CURRENT_TIME INDEX POSITION USAGE |
155 | CURRENT_TIMESTAMP INDICATOR PRECISION USER |
156 | CURRENT_TIMEZONE INHERIT PREPARE USING |
157 | CURRENT_USER INNER PRIMARY VALIDPROC |
158 | CURSOR INOUT PRIQTY VALUES |
159 | CYCLE INSENSITIVE PRIVILEGES VARIABLE |
160 | DATA INSERT PROCEDURE VARIANT |
161 | DATABASE INTEGRITY PROGRAM VCAT |
162 | DAY INTO PSID VIEW |
163 | DAYS IS QUERYNO VOLUMES |
164 | DB2GENERAL ISOBID READ WHEN |
165 | DB2GENRL ISOLATION READS WHERE |
166 | DB2SQL ITERATE RECOVERY WHILE |
167 | DBINFO JAR REFERENCES WITH |
168 | DECLARE JAVA REFERENCING WLM |
169 | DEFAULT JOIN RELEASE WRITE |
170 | DEFAULTS KEY RENAME YEAR |
171 | DEFINITION LABEL REPEAT YEARS |
172 | DELETE LANGUAGE RESET |
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173 | DESCRIPTOR LC_CTYPE RESIGNAL |
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174 | /; |
175 | |
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176 | sub produce |
177 | { |
178 | my ($translator) = @_; |
179 | $DEBUG = $translator->debug; |
180 | $WARN = $translator->show_warnings; |
181 | my $no_comments = $translator->no_comments; |
182 | my $add_drop_table = $translator->add_drop_table; |
183 | my $schema = $translator->schema; |
184 | my $output = ''; |
185 | my $indent = ' '; |
186 | |
187 | $output .= header_comment unless($no_comments); |
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188 | my (@table_defs, @fks, @index_defs); |
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189 | foreach my $table ($schema->get_tables) |
190 | { |
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191 | push @table_defs, 'DROP TABLE ' . $table->name . ";" if $add_drop_table; |
b08b5416 |
192 | my ($table_def, $fks) = create_table($table, { |
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193 | no_comments => $no_comments}); |
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194 | push @table_defs, $table_def; |
195 | push @fks, @$fks; |
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196 | |
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197 | foreach my $index ($table->get_indices) |
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198 | { |
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199 | push @index_defs, create_index($index); |
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200 | } |
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201 | |
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202 | } |
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203 | my (@view_defs); |
204 | foreach my $view ( $schema->get_views ) |
205 | { |
206 | push @view_defs, create_view($view); |
207 | } |
208 | my (@trigger_defs); |
209 | foreach my $trigger ( $schema->get_triggers ) |
210 | { |
211 | push @trigger_defs, create_trigger($trigger); |
212 | } |
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213 | |
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214 | return wantarray ? (@table_defs, @fks, @index_defs, @view_defs, @trigger_defs) : |
215 | $output . join("\n\n", @table_defs, @fks, @index_defs, @view_defs, @trigger_defs) . "\n"; |
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216 | } |
217 | |
218 | { my %objnames; |
219 | |
220 | sub check_name |
221 | { |
222 | my ($name, $type, $length) = @_; |
223 | |
224 | my $newname = $name; |
225 | if(length($name) > $length) ## Maximum table name length is 18 |
226 | { |
227 | warn "Table name $name is longer than $length characters, truncated" if $WARN; |
ea93df61 |
228 | # if(grep {$_ eq substr($name, 0, $length) } |
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229 | # values(%{$objnames{$type}})) |
230 | # { |
231 | # die "Got multiple matching table names when truncated"; |
232 | # } |
233 | # $objnames{$type}{$name} = substr($name, 0,$length); |
234 | # $newname = $objnames{$type}{$name}; |
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235 | } |
236 | |
237 | if($db2_reserved{uc($newname)}) |
238 | { |
239 | warn "$newname is a reserved word in DB2!" if $WARN; |
240 | } |
241 | |
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242 | # return sprintf("%-*s", $length-5, $newname); |
243 | return $newname; |
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244 | } |
245 | } |
246 | |
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247 | sub create_table |
248 | { |
249 | my ($table, $options) = @_; |
250 | |
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251 | my $table_name = check_name($table->name, 'tables', 128); |
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252 | # this limit is 18 in older DB2s ! (<= 8) |
253 | |
254 | my (@field_defs, @comments); |
255 | push @comments, "--\n-- Table: $table_name\n--" unless $options->{no_comments}; |
256 | foreach my $field ($table->get_fields) |
257 | { |
258 | push @field_defs, create_field($field); |
259 | } |
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260 | my (@con_defs, @fks); |
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261 | foreach my $con ($table->get_constraints) |
262 | { |
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263 | my ($cdefs, $fks) = create_constraint($con); |
264 | push @con_defs, @$cdefs; |
265 | push @fks, @$fks; |
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266 | } |
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267 | |
268 | my $tablespace = $table->extra()->{'TABLESPACE'} || ''; |
269 | my $table_def = "CREATE TABLE $table_name (\n"; |
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270 | $table_def .= join (",\n", map { " $_" } @field_defs, @con_defs); |
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271 | $table_def .= "\n)"; |
272 | $table_def .= $tablespace ? "IN $tablespace;" : ';'; |
273 | |
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274 | return $table_def, \@fks; |
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275 | } |
276 | |
277 | sub create_field |
278 | { |
279 | my ($field) = @_; |
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280 | |
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281 | my $field_name = check_name($field->name, 'fields', 30); |
282 | # use Data::Dumper; |
283 | # print Dumper(\%dt_translate); |
284 | # print $field->data_type, " ", $dt_translate{lc($field->data_type)}, "\n"; |
285 | my $data_type = uc($dt_translate{lc($field->data_type)} || $field->data_type); |
286 | my $size = $field->size(); |
287 | |
288 | my $field_def = "$field_name $data_type"; |
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289 | $field_def .= $field->is_auto_increment ? |
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290 | ' GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1)' : ''; |
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291 | $field_def .= $data_type =~ /(CHAR|CLOB|NUMERIC|DECIMAL)/i ? "(${size})" : ''; |
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292 | $field_def .= !$field->is_nullable ? ' NOT NULL':''; |
293 | # $field_def .= $field->is_primary_key ? ' PRIMARY KEY':''; |
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294 | $field_def .= !defined $field->default_value ? '' : |
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295 | $field->default_value =~ /current( |_)timestamp/i || |
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296 | $field->default_value =~ /\Qnow()\E/i ? |
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297 | ' DEFAULT CURRENT TIMESTAMP' : defined $field->default_value ? |
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298 | (" DEFAULT " . ($data_type =~ /(INT|DOUBLE)/i ? |
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299 | $field->default_value : "'" . $field->default_value . "'") |
300 | ) : ''; |
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301 | |
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302 | return $field_def; |
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303 | } |
304 | |
305 | sub create_index |
306 | { |
307 | my ($index) = @_; |
308 | |
309 | my $out = sprintf('CREATE %sINDEX %s ON %s ( %s );', |
310 | $index->type() =~ /^UNIQUE$/i ? 'UNIQUE' : '', |
311 | $index->name, |
312 | $index->table->name, |
313 | join(', ', $index->fields) ); |
314 | |
315 | return $out; |
316 | } |
317 | |
318 | sub create_constraint |
319 | { |
320 | my ($constraint) = @_; |
321 | |
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322 | my (@con_defs, @fks); |
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323 | |
324 | my $ctype = $constraint->type =~ /^PRIMARY(_|\s)KEY$/i ? 'PRIMARY KEY' : |
325 | $constraint->type =~ /^UNIQUE$/i ? 'UNIQUE' : |
326 | $constraint->type =~ /^CHECK_C$/i ? 'CHECK' : |
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327 | $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? 'FOREIGN KEY' : ''; |
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328 | |
329 | my $expr = $constraint->type =~ /^CHECK_C$/i ? $constraint->expression : |
330 | ''; |
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331 | my $ref = $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? ('REFERENCES ' . $constraint->reference_table . '(' . join(', ', $constraint->reference_fields) . ')') : ''; |
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332 | my $update = $constraint->on_update ? $constraint->on_update : ''; |
333 | my $delete = $constraint->on_delete ? $constraint->on_delete : ''; |
334 | |
b08b5416 |
335 | my $out = join(' ', grep { $_ } |
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336 | $constraint->name ? ('CONSTRAINT ' . $constraint->name) : '', |
337 | $ctype, |
338 | '(' . join (', ', $constraint->fields) . ')', |
339 | $expr ? $expr : $ref, |
340 | $update, |
341 | $delete); |
b08b5416 |
342 | if ($constraint->type eq FOREIGN_KEY) { |
343 | my $table_name = $constraint->table->name; |
344 | $out = "ALTER TABLE $table_name ADD $out;"; |
345 | push @fks, $out; |
346 | } |
347 | else { |
348 | push @con_defs, $out; |
349 | } |
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350 | |
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351 | return \@con_defs, \@fks; |
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352 | |
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353 | } |
354 | |
355 | sub create_view |
356 | { |
357 | my ($view) = @_; |
358 | |
359 | my $out = sprintf("CREATE VIEW %s AS\n%s;", |
360 | $view->name, |
361 | $view->sql); |
362 | |
363 | return $out; |
364 | } |
365 | |
366 | sub create_trigger |
367 | { |
368 | my ($trigger) = @_; |
369 | # create: CREATE TRIGGER trigger_name before type /ON/i table_name reference_b(?) /FOR EACH ROW/i 'MODE DB2SQL' triggered_action |
370 | |
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371 | my $db_events = join ', ', $trigger->database_events; |
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372 | my $out = sprintf('CREATE TRIGGER %s %s %s ON %s %s %s MODE DB2SQL %s', |
373 | $trigger->name, |
374 | $trigger->perform_action_when || 'AFTER', |
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375 | $db_events =~ /update_on/i ? |
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376 | ('UPDATE OF '. join(', ', $trigger->fields)) : |
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377 | $db_events || 'UPDATE', |
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378 | $trigger->table->name, |
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379 | $trigger->extra->{reference} || 'REFERENCING OLD AS oldrow NEW AS newrow', |
380 | $trigger->extra->{granularity} || 'FOR EACH ROW', |
381 | $trigger->action ); |
382 | |
383 | return $out; |
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384 | |
a0ea6c87 |
385 | } |
386 | |
387 | sub alter_field |
388 | { |
389 | my ($from_field, $to_field) = @_; |
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390 | |
391 | my $data_type = uc($dt_translate{lc($to_field->data_type)} || $to_field->data_type); |
392 | |
393 | my $size = $to_field->size(); |
394 | $data_type .= $data_type =~ /CHAR/i ? "(${size})" : ''; |
395 | |
396 | # DB2 will only allow changing of varchar/vargraphic datatypes |
397 | # to extend their lengths. Or changing of text types to other |
398 | # texttypes, and numeric types to larger numeric types. (v8) |
399 | # We can also drop/add keys, checks and constraints, but not |
400 | # columns !? |
401 | |
402 | my $out = sprintf('ALTER TABLE %s ALTER %s SET DATATYPE %s', |
403 | $to_field->table->name, |
404 | $to_field->name, |
405 | $data_type); |
406 | |
a0ea6c87 |
407 | } |
408 | |
409 | sub add_field |
410 | { |
5e2c196a |
411 | my ($new_field) = @_; |
412 | |
413 | my $out = sprintf('ALTER TABLE %s ADD COLUMN %s', |
414 | $new_field->table->name, |
415 | create_field($new_field)); |
416 | |
417 | return $out; |
a0ea6c87 |
418 | } |
419 | |
420 | sub drop_field |
421 | { |
422 | my ($field) = @_; |
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423 | |
424 | return ''; |
a0ea6c87 |
425 | } |
04bc93b6 |
426 | 1; |