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1 | package SQL::Translator::Parser::DBI::MySQL; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: MySQL.pm,v 1.2 2003-10-03 19:47:19 kycl4rk Exp $ |
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5 | # ------------------------------------------------------------------- |
6 | # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>. |
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 | # ------------------------------------------------------------------- |
22 | |
23 | =head1 NAME |
24 | |
25 | SQL::Translator::Parser::DBI::MySQL - parser for DBD::mysql |
26 | |
27 | =head1 SYNOPSIS |
28 | |
29 | See SQL::Translator::Parser::DBI. |
30 | |
31 | =head1 DESCRIPTION |
32 | |
33 | Queries the "sqlite_master" table for schema definition. |
34 | |
35 | =cut |
36 | |
37 | use strict; |
38 | use DBI; |
39 | use Data::Dumper; |
40 | use SQL::Translator::Schema::Constants; |
41 | |
42 | use vars qw[ $DEBUG $VERSION @EXPORT_OK ]; |
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43 | $VERSION = sprintf "%d.%02d", q$Revision: 1.2 $ =~ /(\d+)\.(\d+)/; |
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44 | $DEBUG = 0 unless defined $DEBUG; |
45 | |
46 | # ------------------------------------------------------------------- |
47 | sub parse { |
48 | my ( $tr, $dbh ) = @_; |
49 | |
50 | my @table_names = @{ $dbh->selectcol_arrayref( 'show tables') }; |
51 | |
52 | my $schema = $tr->schema; |
53 | |
54 | for my $table_name ( @table_names ) { |
55 | my $table = $schema->add_table( |
56 | name => $table_name, |
57 | ) or die $schema->error; |
58 | |
59 | my $cols = $dbh->selectall_arrayref( |
60 | "desc $table_name", |
61 | { Columns => {} } |
62 | ); |
63 | |
64 | for my $col ( @$cols ) { |
65 | my $fname = $col->{'field'} or next; |
66 | my $type = $col->{'type'} or next; |
67 | my $collation = $col->{'collation'} || ''; |
68 | my $is_nullable = uc $col->{'null'} eq 'YES' ? 1 : 0; |
69 | my $key = $col->{'key'}; |
70 | my $default = $col->{'default'}; |
71 | my $extra = $col->{'extra'}; |
72 | |
73 | my ( $data_type, $size, $char_set ); |
74 | |
75 | # |
76 | # Normal datatype = "int(11)" |
77 | # or "varchar(20) character set latin1" |
78 | # |
79 | if ( $type =~ m{ |
80 | (\w+) # data type |
81 | \( # open paren |
82 | (\d+) # first number |
83 | (?:,(\d+))? # optional comma and number |
84 | \) # close paren |
85 | (.*)? # anything else (character set) |
86 | }x |
87 | ) { |
88 | $data_type = $1; |
89 | $size = $2; |
90 | $size .= ",$3" if $3; |
91 | $char_set = $4 || ''; |
92 | } |
93 | # |
94 | # Some data type just say "double" or "text" |
95 | # |
96 | elsif ( $type =~ m{ |
97 | (\w+) # data type |
98 | (.*)? # anything else (character set) |
99 | }x |
100 | ) { |
101 | $data_type = $1; |
102 | $size = undef; |
103 | $char_set = $2 || ''; |
104 | } |
105 | |
106 | my $field = $table->add_field( |
107 | name => $fname, |
108 | data_type => $data_type, |
109 | size => $size, |
110 | default_value => $default, |
111 | is_auto_increment => $extra eq 'auto_increment', |
112 | is_nullable => $is_nullable, |
113 | comments => $extra, |
114 | ) or die $table->error; |
115 | |
116 | $table->primary_key( $field->name ) if $key eq 'PRI'; |
117 | } |
118 | |
119 | my $indices = $dbh->selectall_arrayref( |
120 | "show index from $table_name", |
121 | { Columns => {} }, |
122 | ); |
123 | |
124 | my ( %keys, %constraints, $order ); |
125 | for my $index ( @$indices ) { |
126 | my $table = $index->{'table'}; |
127 | my $non_unique = $index->{'non_unique'}; |
128 | my $key_name = $index->{'key_name'} || ''; |
129 | my $seq_in_index = $index->{'seq_in_index'}; |
130 | my $column_name = $index->{'column_name'}; |
131 | my $collation = $index->{'collation'}; |
132 | my $cardinality = $index->{'cardinality'}; |
133 | my $sub_part = $index->{'sub_part'}; |
134 | my $packed = $index->{'packed'}; |
135 | my $null = $index->{'null'}; |
136 | my $index_type = $index->{'index_type'}; |
137 | my $comment = $index->{'comment'}; |
138 | |
139 | my $is_constraint = $key_name eq 'PRIMARY' || $non_unique == 0; |
140 | |
141 | if ( $is_constraint ) { |
142 | $constraints{ $key_name }{'order'} = ++$order; |
143 | push @{ $constraints{ $key_name }{'fields'} }, $column_name; |
144 | |
145 | if ( $key_name eq 'PRIMARY' ) { |
146 | $constraints{ $key_name }{'type'} = PRIMARY_KEY; |
147 | } |
148 | elsif ( $non_unique == 0 ) { |
149 | $constraints{ $key_name }{'type'} = UNIQUE; |
150 | } |
151 | } |
152 | else { |
153 | $keys{ $key_name }{'order'} = ++$order; |
154 | push @{ $keys{ $key_name }{'fields'} }, $column_name; |
155 | } |
156 | } |
157 | |
158 | for my $key_name ( |
159 | sort { $keys{ $a }{'order'} <=> $keys{ $b }{'order'} } |
160 | keys %keys |
161 | ) { |
162 | my $key = $keys{ $key_name }; |
163 | my $index = $table->add_index( |
164 | name => $key_name, |
165 | type => NORMAL, |
166 | fields => $key->{'fields'}, |
167 | ) or die $table->error; |
168 | } |
169 | |
170 | for my $constraint_name ( |
171 | sort { $constraints{ $a }{'order'} <=> $constraints{ $b }{'order'} } |
172 | keys %constraints |
173 | ) { |
174 | my $def = $constraints{ $constraint_name }; |
175 | my $constraint = $table->add_constraint( |
176 | name => $constraint_name, |
177 | type => $def->{'type'}, |
178 | fields => $def->{'fields'}, |
179 | ) or die $table->error; |
180 | } |
181 | } |
182 | |
183 | return 1; |
184 | } |
185 | |
186 | 1; |
187 | |
188 | # ------------------------------------------------------------------- |
189 | # Where man is not nature is barren. |
190 | # William Blake |
191 | # ------------------------------------------------------------------- |
192 | |
193 | =pod |
194 | |
195 | =head1 AUTHOR |
196 | |
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197 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt>. |
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198 | |
199 | =head1 SEE ALSO |
200 | |
201 | perl(1), Parse::RecDescent, SQL::Translator::Schema. |
202 | |
203 | =cut |