1 package SQL::Translator::Producer::MySQL;
3 # -------------------------------------------------------------------
4 # $Id: MySQL.pm,v 1.41 2004-09-20 20:48:19 kycl4rk Exp $
5 # -------------------------------------------------------------------
6 # Copyright (C) 2002-4 SQLFairy Authors
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.
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.
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
21 # -------------------------------------------------------------------
25 SQL::Translator::Producer::MySQL - MySQL-specific producer for SQL::Translator
29 Use via SQL::Translator:
33 my $t = SQL::Translator->new( parser => '...', producer => 'MySQL', '...' );
38 This module will produce text output of the schema suitable for MySQL.
39 There are still some issues to be worked out with syntax differences
40 between MySQL versions 3 and 4 ("SET foreign_key_checks," character sets
46 use vars qw[ $VERSION $DEBUG ];
47 $VERSION = sprintf "%d.%02d", q$Revision: 1.41 $ =~ /(\d+)\.(\d+)/;
48 $DEBUG = 0 unless defined $DEBUG;
51 use SQL::Translator::Schema::Constants;
52 use SQL::Translator::Utils qw(debug header_comment);
55 # Use only lowercase for the keys (e.g. "long" and not "LONG")
61 varchar2 => 'varchar',
77 'long integer' => 'integer',
79 'datetime' => 'datetime',
83 my $translator = shift;
84 local $DEBUG = $translator->debug;
85 my $no_comments = $translator->no_comments;
86 my $add_drop_table = $translator->add_drop_table;
87 my $schema = $translator->schema;
88 my $show_warnings = $translator->show_warnings || 0;
90 debug("PKG: Beginning production\n");
93 $create .= header_comment unless ($no_comments);
94 # \todo Don't set if MySQL 3.x is set on command line
95 $create .= "SET foreign_key_checks=0;\n\n";
97 for my $table ( $schema->get_tables ) {
98 my $table_name = $table->name;
99 debug("PKG: Looking at table '$table_name'\n");
102 # Header. Should this look like what mysqldump produces?
104 $create .= "--\n-- Table: $table_name\n--\n" unless $no_comments;
105 $create .= qq[DROP TABLE IF EXISTS $table_name;\n] if $add_drop_table;
106 $create .= "CREATE TABLE $table_name (\n";
112 for my $field ( $table->get_fields ) {
113 my $field_name = $field->name;
114 debug("PKG: Looking at field '$field_name'\n");
115 my $field_def = $field_name;
118 my $data_type = $field->data_type;
119 my @size = $field->size;
120 my %extra = $field->extra;
121 my $list = $extra{'list'} || [];
122 # \todo deal with embedded quotes
123 my $commalist = join( ', ', map { qq['$_'] } @$list );
126 # Oracle "number" type -- figure best MySQL type
128 if ( lc $data_type eq 'number' ) {
130 if ( scalar @size > 1 ) {
131 $data_type = 'double';
133 elsif ( $size[0] && $size[0] >= 12 ) {
134 $data_type = 'bigint';
136 elsif ( $size[0] && $size[0] <= 1 ) {
137 $data_type = 'tinyint';
144 # Convert a large Oracle varchar to "text"
146 elsif ( $data_type =~ /char/i && $size[0] > 255 ) {
150 elsif ( $data_type =~ /char/i && ! $size[0] ) {
153 elsif ( $data_type =~ /boolean/i ) {
155 $commalist = "'0','1'";
157 elsif ( exists $translate{ lc $data_type } ) {
158 $data_type = $translate{ lc $data_type };
161 @size = () if $data_type =~ /(text|blob)/i;
163 if ( $data_type =~ /(double|float)/ && scalar @size == 1 ) {
167 $field_def .= " $data_type";
169 if ( lc $data_type eq 'enum' ) {
170 $field_def .= '(' . $commalist . ')';
172 elsif ( defined $size[0] && $size[0] > 0 ) {
173 $field_def .= '(' . join( ', ', @size ) . ')';
177 for my $qual ( qw[ binary unsigned zerofill ] ) {
178 my $val = $extra{ $qual || uc $qual } or next;
179 $field_def .= " $qual";
183 $field_def .= ' NOT NULL' unless $field->is_nullable;
185 # Default? XXX Need better quoting!
186 my $default = $field->default_value;
187 if ( defined $default ) {
188 if ( uc $default eq 'NULL') {
189 $field_def .= ' DEFAULT NULL';
191 $field_def .= " DEFAULT '$default'";
196 $field_def .= " auto_increment" if $field->is_auto_increment;
197 push @field_defs, $field_def;
205 for my $index ( $table->get_indices ) {
206 push @index_defs, join( ' ',
207 lc $index->type eq 'normal' ? 'INDEX' : $index->type,
209 '(' . join( ', ', $index->fields ) . ')'
211 $indexed_fields{ $_ } = 1 for $index->fields;
215 # Constraints -- need to handle more than just FK. -ky
219 my @constraints = $table->get_constraints;
220 for my $c ( @constraints ) {
221 my @fields = $c->fields or next;
223 if ( $c->type eq PRIMARY_KEY ) {
224 push @constraint_defs,
225 'PRIMARY KEY (' . join(', ', @fields). ')';
227 elsif ( $c->type eq UNIQUE ) {
228 push @constraint_defs,
229 'UNIQUE (' . join(', ', @fields). ')';
231 elsif ( $c->type eq FOREIGN_KEY ) {
235 # Make sure FK field is indexed or MySQL complains.
237 unless ( $indexed_fields{ $fields[0] } ) {
238 push @index_defs, "INDEX ($fields[0])";
239 $indexed_fields{ $fields[0] } = 1;
243 map { $_ || () } 'FOREIGN KEY', $c->name
246 $def .= ' (' . join( ', ', @fields ) . ')';
248 $def .= ' REFERENCES ' . $c->reference_table;
250 my @rfields = map { $_ || () } $c->reference_fields;
251 unless ( @rfields ) {
252 my $rtable_name = $c->reference_table;
253 if ( my $ref_table = $schema->get_table( $rtable_name ) ) {
254 push @rfields, $ref_table->primary_key;
257 warn "Can't find reference table '$rtable_name' " .
258 "in schema\n" if $show_warnings;
263 $def .= ' (' . join( ', ', @rfields ) . ')';
266 warn "FK constraint on " . $table->name . '.' .
267 join('', @fields) . " has no reference fields\n"
271 if ( $c->match_type ) {
273 ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
276 if ( $c->on_delete ) {
277 $def .= ' ON DELETE '.join( ' ', $c->on_delete );
280 if ( $c->on_update ) {
281 $def .= ' ON UPDATE '.join( ' ', $c->on_update );
284 push @constraint_defs, $def;
288 $create .= join(",\n", map { " $_" }
289 @field_defs, @index_defs, @constraint_defs
297 $create .= " Type=InnoDB";
307 # -------------------------------------------------------------------
313 SQL::Translator, http://www.mysql.com/.
317 darren chamberlain E<lt>darren@cpan.orgE<gt>,
318 Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.