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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; |
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22 | use vars qw[ $VERSION $DEBUG $WARN ]; |
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23 | $VERSION = '1.59'; |
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24 | $DEBUG = 0 unless defined $DEBUG; |
25 | |
26 | use SQL::Translator::Schema::Constants; |
27 | use SQL::Translator::Utils qw(header_comment); |
28 | |
29 | |
30 | # http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/ad/r0006844.htm |
31 | |
32 | # This is a terrible WTDI, each Parser should parse down to some standard set |
33 | # of SQL data types, with field->extra entries being used to convert back to |
34 | # weird types like "polygon" if needed (IMO anyway) |
35 | |
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36 | my %dt_translate; |
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37 | BEGIN { |
38 | %dt_translate = ( |
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39 | # |
40 | # MySQL types |
41 | # |
42 | int => 'integer', |
43 | mediumint => 'integer', |
44 | tinyint => 'smallint', |
45 | char => 'char', |
46 | tinyblob => 'blob', |
47 | mediumblob => 'blob', |
48 | longblob => 'long varchar for bit data', |
49 | tinytext => 'varchar', |
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50 | text => 'varchar', |
51 | longtext => 'varchar', |
52 | mediumtext => 'varchar', |
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53 | enum => 'varchar', |
54 | set => 'varchar', |
55 | date => 'date', |
56 | datetime => 'timestamp', |
57 | time => 'time', |
58 | year => 'date', |
59 | |
60 | # |
61 | # PostgreSQL types |
62 | # |
63 | 'double precision' => 'double', |
64 | serial => 'integer', |
65 | bigserial => 'integer', |
66 | money => 'double', |
67 | character => 'char', |
68 | 'character varying' => 'varchar', |
69 | bytea => 'BLOB', |
70 | interval => 'integer', |
71 | boolean => 'smallint', |
72 | point => 'integer', |
73 | line => 'integer', |
74 | lseg => 'integer', |
75 | box => 'integer', |
76 | path => 'integer', |
77 | polygon => 'integer', |
78 | circle => 'integer', |
79 | cidr => 'integer', |
80 | inet => 'varchar', |
81 | macaddr => 'varchar', |
82 | bit => 'number', |
83 | 'bit varying' => 'number', |
84 | |
85 | # |
86 | # DB types |
87 | # |
88 | number => 'integer', |
89 | varchar2 => 'varchar', |
90 | long => 'clob', |
91 | ); |
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92 | } |
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93 | |
94 | my %db2_reserved = map { $_ => 1} qw/ |
95 | ADD DETERMINISTIC LEAVE RESTART |
96 | AFTER DISALLOW LEFT RESTRICT |
97 | ALIAS DISCONNECT LIKE RESULT |
98 | ALL DISTINCT LINKTYPE RESULT_SET_LOCATOR |
99 | ALLOCATE DO LOCAL RETURN |
100 | ALLOW DOUBLE LOCALE RETURNS |
101 | ALTER DROP LOCATOR REVOKE |
102 | AND DSNHATTR LOCATORS RIGHT |
103 | ANY DSSIZE LOCK ROLLBACK |
104 | APPLICATION DYNAMIC LOCKMAX ROUTINE |
105 | AS EACH LOCKSIZE ROW |
106 | ASSOCIATE EDITPROC LONG ROWS |
107 | ASUTIME ELSE LOOP RRN |
108 | AUDIT ELSEIF MAXVALUE RUN |
109 | AUTHORIZATION ENCODING MICROSECOND SAVEPOINT |
110 | AUX END MICROSECONDS SCHEMA |
111 | AUXILIARY END-EXEC MINUTE SCRATCHPAD |
112 | BEFORE END-EXEC1 MINUTES SECOND |
113 | BEGIN ERASE MINVALUE SECONDS |
114 | BETWEEN ESCAPE MODE SECQTY |
115 | BINARY EXCEPT MODIFIES SECURITY |
116 | BUFFERPOOL EXCEPTION MONTH SELECT |
117 | BY EXCLUDING MONTHS SENSITIVE |
118 | CACHE EXECUTE NEW SET |
119 | CALL EXISTS NEW_TABLE SIGNAL |
120 | CALLED EXIT NO SIMPLE |
121 | CAPTURE EXTERNAL NOCACHE SOME |
122 | CARDINALITY FENCED NOCYCLE SOURCE |
123 | CASCADED FETCH NODENAME SPECIFIC |
124 | CASE FIELDPROC NODENUMBER SQL |
125 | CAST FILE NOMAXVALUE SQLID |
126 | CCSID FINAL NOMINVALUE STANDARD |
127 | CHAR FOR NOORDER START |
128 | CHARACTER FOREIGN NOT STATIC |
129 | CHECK FREE NULL STAY |
130 | CLOSE FROM NULLS STOGROUP |
131 | CLUSTER FULL NUMPARTS STORES |
132 | COLLECTION FUNCTION OBID STYLE |
133 | COLLID GENERAL OF SUBPAGES |
134 | COLUMN GENERATED OLD SUBSTRING |
135 | COMMENT GET OLD_TABLE SYNONYM |
136 | COMMIT GLOBAL ON SYSFUN |
137 | CONCAT GO OPEN SYSIBM |
138 | CONDITION GOTO OPTIMIZATION SYSPROC |
139 | CONNECT GRANT OPTIMIZE SYSTEM |
140 | CONNECTION GRAPHIC OPTION TABLE |
141 | CONSTRAINT GROUP OR TABLESPACE |
142 | CONTAINS HANDLER ORDER THEN |
143 | CONTINUE HAVING OUT TO |
144 | COUNT HOLD OUTER TRANSACTION |
145 | COUNT_BIG HOUR OVERRIDING TRIGGER |
146 | CREATE HOURS PACKAGE TRIM |
147 | CROSS IDENTITY PARAMETER TYPE |
148 | CURRENT IF PART UNDO |
149 | CURRENT_DATE IMMEDIATE PARTITION UNION |
150 | CURRENT_LC_CTYPE IN PATH UNIQUE |
151 | CURRENT_PATH INCLUDING PIECESIZE UNTIL |
152 | CURRENT_SERVER INCREMENT PLAN UPDATE |
153 | CURRENT_TIME INDEX POSITION USAGE |
154 | CURRENT_TIMESTAMP INDICATOR PRECISION USER |
155 | CURRENT_TIMEZONE INHERIT PREPARE USING |
156 | CURRENT_USER INNER PRIMARY VALIDPROC |
157 | CURSOR INOUT PRIQTY VALUES |
158 | CYCLE INSENSITIVE PRIVILEGES VARIABLE |
159 | DATA INSERT PROCEDURE VARIANT |
160 | DATABASE INTEGRITY PROGRAM VCAT |
161 | DAY INTO PSID VIEW |
162 | DAYS IS QUERYNO VOLUMES |
163 | DB2GENERAL ISOBID READ WHEN |
164 | DB2GENRL ISOLATION READS WHERE |
165 | DB2SQL ITERATE RECOVERY WHILE |
166 | DBINFO JAR REFERENCES WITH |
167 | DECLARE JAVA REFERENCING WLM |
168 | DEFAULT JOIN RELEASE WRITE |
169 | DEFAULTS KEY RENAME YEAR |
170 | DEFINITION LABEL REPEAT YEARS |
171 | DELETE LANGUAGE RESET |
172 | DESCRIPTOR LC_CTYPE RESIGNAL |
173 | /; |
174 | |
175 | #------------------------------------------------------------------------------ |
176 | |
177 | sub produce |
178 | { |
179 | my ($translator) = @_; |
180 | $DEBUG = $translator->debug; |
181 | $WARN = $translator->show_warnings; |
182 | my $no_comments = $translator->no_comments; |
183 | my $add_drop_table = $translator->add_drop_table; |
184 | my $schema = $translator->schema; |
185 | my $output = ''; |
186 | my $indent = ' '; |
187 | |
188 | $output .= header_comment unless($no_comments); |
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189 | my (@table_defs, @fks, @index_defs); |
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190 | foreach my $table ($schema->get_tables) |
191 | { |
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192 | push @table_defs, 'DROP TABLE ' . $table->name . ";" if $add_drop_table; |
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193 | my ($table_def, $fks) = create_table($table, { |
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194 | no_comments => $no_comments}); |
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195 | push @table_defs, $table_def; |
196 | push @fks, @$fks; |
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197 | |
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198 | foreach my $index ($table->get_indices) |
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199 | { |
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200 | push @index_defs, create_index($index); |
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201 | } |
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202 | |
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203 | } |
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204 | my (@view_defs); |
205 | foreach my $view ( $schema->get_views ) |
206 | { |
207 | push @view_defs, create_view($view); |
208 | } |
209 | my (@trigger_defs); |
210 | foreach my $trigger ( $schema->get_triggers ) |
211 | { |
212 | push @trigger_defs, create_trigger($trigger); |
213 | } |
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214 | |
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215 | return wantarray ? (@table_defs, @fks, @index_defs, @view_defs, @trigger_defs) : |
216 | $output . join("\n\n", @table_defs, @fks, @index_defs, @view_defs, @trigger_defs) . "\n"; |
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217 | } |
218 | |
219 | { my %objnames; |
220 | |
221 | sub check_name |
222 | { |
223 | my ($name, $type, $length) = @_; |
224 | |
225 | my $newname = $name; |
226 | if(length($name) > $length) ## Maximum table name length is 18 |
227 | { |
228 | warn "Table name $name is longer than $length characters, truncated" if $WARN; |
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229 | # if(grep {$_ eq substr($name, 0, $length) } |
230 | # values(%{$objnames{$type}})) |
231 | # { |
232 | # die "Got multiple matching table names when truncated"; |
233 | # } |
234 | # $objnames{$type}{$name} = substr($name, 0,$length); |
235 | # $newname = $objnames{$type}{$name}; |
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236 | } |
237 | |
238 | if($db2_reserved{uc($newname)}) |
239 | { |
240 | warn "$newname is a reserved word in DB2!" if $WARN; |
241 | } |
242 | |
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243 | # return sprintf("%-*s", $length-5, $newname); |
244 | return $newname; |
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245 | } |
246 | } |
247 | |
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248 | sub create_table |
249 | { |
250 | my ($table, $options) = @_; |
251 | |
252 | my $table_name = check_name($table->name, 'tables', 128); |
253 | # this limit is 18 in older DB2s ! (<= 8) |
254 | |
255 | my (@field_defs, @comments); |
256 | push @comments, "--\n-- Table: $table_name\n--" unless $options->{no_comments}; |
257 | foreach my $field ($table->get_fields) |
258 | { |
259 | push @field_defs, create_field($field); |
260 | } |
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261 | my (@con_defs, @fks); |
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262 | foreach my $con ($table->get_constraints) |
263 | { |
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264 | my ($cdefs, $fks) = create_constraint($con); |
265 | push @con_defs, @$cdefs; |
266 | push @fks, @$fks; |
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267 | } |
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268 | |
269 | my $tablespace = $table->extra()->{'TABLESPACE'} || ''; |
270 | my $table_def = "CREATE TABLE $table_name (\n"; |
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271 | $table_def .= join (",\n", map { " $_" } @field_defs, @con_defs); |
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272 | $table_def .= "\n)"; |
273 | $table_def .= $tablespace ? "IN $tablespace;" : ';'; |
274 | |
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275 | return $table_def, \@fks; |
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276 | } |
277 | |
278 | sub create_field |
279 | { |
280 | my ($field) = @_; |
281 | |
282 | my $field_name = check_name($field->name, 'fields', 30); |
283 | # use Data::Dumper; |
284 | # print Dumper(\%dt_translate); |
285 | # print $field->data_type, " ", $dt_translate{lc($field->data_type)}, "\n"; |
286 | my $data_type = uc($dt_translate{lc($field->data_type)} || $field->data_type); |
287 | my $size = $field->size(); |
288 | |
289 | my $field_def = "$field_name $data_type"; |
290 | $field_def .= $field->is_auto_increment ? |
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291 | ' GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1)' : ''; |
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292 | $field_def .= $data_type =~ /(CHAR|CLOB|NUMERIC|DECIMAL)/i ? "(${size})" : ''; |
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293 | $field_def .= !$field->is_nullable ? ' NOT NULL':''; |
294 | # $field_def .= $field->is_primary_key ? ' PRIMARY KEY':''; |
295 | $field_def .= !defined $field->default_value ? '' : |
296 | $field->default_value =~ /current( |_)timestamp/i || |
297 | $field->default_value =~ /\Qnow()\E/i ? |
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298 | ' DEFAULT CURRENT TIMESTAMP' : defined $field->default_value ? |
299 | (" DEFAULT " . ($data_type =~ /(INT|DOUBLE)/i ? |
300 | $field->default_value : "'" . $field->default_value . "'") |
301 | ) : ''; |
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302 | |
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303 | return $field_def; |
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304 | } |
305 | |
306 | sub create_index |
307 | { |
308 | my ($index) = @_; |
309 | |
310 | my $out = sprintf('CREATE %sINDEX %s ON %s ( %s );', |
311 | $index->type() =~ /^UNIQUE$/i ? 'UNIQUE' : '', |
312 | $index->name, |
313 | $index->table->name, |
314 | join(', ', $index->fields) ); |
315 | |
316 | return $out; |
317 | } |
318 | |
319 | sub create_constraint |
320 | { |
321 | my ($constraint) = @_; |
322 | |
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323 | my (@con_defs, @fks); |
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324 | |
325 | my $ctype = $constraint->type =~ /^PRIMARY(_|\s)KEY$/i ? 'PRIMARY KEY' : |
326 | $constraint->type =~ /^UNIQUE$/i ? 'UNIQUE' : |
327 | $constraint->type =~ /^CHECK_C$/i ? 'CHECK' : |
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328 | $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? 'FOREIGN KEY' : ''; |
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329 | |
330 | my $expr = $constraint->type =~ /^CHECK_C$/i ? $constraint->expression : |
331 | ''; |
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332 | my $ref = $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? ('REFERENCES ' . $constraint->reference_table . '(' . join(', ', $constraint->reference_fields) . ')') : ''; |
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333 | my $update = $constraint->on_update ? $constraint->on_update : ''; |
334 | my $delete = $constraint->on_delete ? $constraint->on_delete : ''; |
335 | |
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336 | my $out = join(' ', grep { $_ } |
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337 | $constraint->name ? ('CONSTRAINT ' . $constraint->name) : '', |
338 | $ctype, |
339 | '(' . join (', ', $constraint->fields) . ')', |
340 | $expr ? $expr : $ref, |
341 | $update, |
342 | $delete); |
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343 | if ($constraint->type eq FOREIGN_KEY) { |
344 | my $table_name = $constraint->table->name; |
345 | $out = "ALTER TABLE $table_name ADD $out;"; |
346 | push @fks, $out; |
347 | } |
348 | else { |
349 | push @con_defs, $out; |
350 | } |
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351 | |
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352 | return \@con_defs, \@fks; |
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353 | |
354 | } |
355 | |
356 | sub create_view |
357 | { |
358 | my ($view) = @_; |
359 | |
360 | my $out = sprintf("CREATE VIEW %s AS\n%s;", |
361 | $view->name, |
362 | $view->sql); |
363 | |
364 | return $out; |
365 | } |
366 | |
367 | sub create_trigger |
368 | { |
369 | my ($trigger) = @_; |
370 | # create: CREATE TRIGGER trigger_name before type /ON/i table_name reference_b(?) /FOR EACH ROW/i 'MODE DB2SQL' triggered_action |
371 | |
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372 | my $db_events = join ', ', $trigger->database_events; |
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373 | my $out = sprintf('CREATE TRIGGER %s %s %s ON %s %s %s MODE DB2SQL %s', |
374 | $trigger->name, |
375 | $trigger->perform_action_when || 'AFTER', |
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376 | $db_events =~ /update_on/i ? |
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377 | ('UPDATE OF '. join(', ', $trigger->fields)) : |
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378 | $db_events || 'UPDATE', |
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379 | $trigger->table->name, |
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380 | $trigger->extra->{reference} || 'REFERENCING OLD AS oldrow NEW AS newrow', |
381 | $trigger->extra->{granularity} || 'FOR EACH ROW', |
382 | $trigger->action ); |
383 | |
384 | return $out; |
385 | |
386 | } |
387 | |
388 | sub alter_field |
389 | { |
390 | my ($from_field, $to_field) = @_; |
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391 | |
392 | my $data_type = uc($dt_translate{lc($to_field->data_type)} || $to_field->data_type); |
393 | |
394 | my $size = $to_field->size(); |
395 | $data_type .= $data_type =~ /CHAR/i ? "(${size})" : ''; |
396 | |
397 | # DB2 will only allow changing of varchar/vargraphic datatypes |
398 | # to extend their lengths. Or changing of text types to other |
399 | # texttypes, and numeric types to larger numeric types. (v8) |
400 | # We can also drop/add keys, checks and constraints, but not |
401 | # columns !? |
402 | |
403 | my $out = sprintf('ALTER TABLE %s ALTER %s SET DATATYPE %s', |
404 | $to_field->table->name, |
405 | $to_field->name, |
406 | $data_type); |
407 | |
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408 | } |
409 | |
410 | sub add_field |
411 | { |
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412 | my ($new_field) = @_; |
413 | |
414 | my $out = sprintf('ALTER TABLE %s ADD COLUMN %s', |
415 | $new_field->table->name, |
416 | create_field($new_field)); |
417 | |
418 | return $out; |
a0ea6c87 |
419 | } |
420 | |
421 | sub drop_field |
422 | { |
423 | my ($field) = @_; |
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424 | |
425 | return ''; |
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426 | } |
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427 | 1; |