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1 | package SQL::Translator::Producer::SQLite; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: SQLite.pm,v 1.3 2003-04-25 11:47:25 dlc Exp $ |
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5 | # ------------------------------------------------------------------- |
6 | # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>, |
7 | # darren chamberlain <darren@cpan.org>, |
8 | # Chris Mungall <cjm@fruitfly.org> |
9 | # |
10 | # This program is free software; you can redistribute it and/or |
11 | # modify it under the terms of the GNU General Public License as |
12 | # published by the Free Software Foundation; version 2. |
13 | # |
14 | # This program is distributed in the hope that it will be useful, but |
15 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | # General Public License for more details. |
18 | # |
19 | # You should have received a copy of the GNU General Public License |
20 | # along with this program; if not, write to the Free Software |
21 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
22 | # 02111-1307 USA |
23 | # ------------------------------------------------------------------- |
24 | |
25 | use strict; |
26 | use Data::Dumper; |
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27 | use SQL::Translator::Utils qw(debug header_comment); |
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28 | |
29 | use vars qw[ $VERSION $DEBUG $WARN ]; |
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30 | |
31 | $VERSION = sprintf "%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/; |
32 | $DEBUG = 0 unless defined $DEBUG; |
33 | $WARN = 0 unless defined $WARN; |
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34 | |
35 | my %used_identifiers = (); |
36 | my $max_id_length = 30; |
37 | my %global_names; |
38 | my %truncated; |
39 | |
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40 | sub produce { |
41 | my ($translator, $data) = @_; |
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42 | local $DEBUG = $translator->debug; |
43 | local $WARN = $translator->show_warnings; |
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44 | my $no_comments = $translator->no_comments; |
45 | my $add_drop_table = $translator->add_drop_table; |
46 | |
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47 | debug("PKG: Beginning production\n"); |
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48 | |
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49 | my $create = ''; |
50 | $create .= header_comment unless ($no_comments); |
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51 | |
52 | for my $table ( keys %{ $data } ) { |
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53 | debug("PKG: Looking at table '$table'\n"); |
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54 | my $table_data = $data->{$table}; |
55 | my @fields = sort { |
56 | $table_data->{'fields'}->{$a}->{'order'} |
57 | <=> |
58 | $table_data->{'fields'}->{$b}->{'order'} |
59 | } keys %{$table_data->{'fields'}}; |
60 | |
61 | # |
62 | # Header. Should this look like what mysqldump produces? |
63 | # |
64 | $create .= "--\n-- Table: $table\n--\n" unless $no_comments; |
65 | $create .= qq[DROP TABLE $table;\n] if $add_drop_table; |
66 | $create .= "CREATE TABLE $table ("; |
67 | |
68 | # |
69 | # Fields |
70 | # |
71 | for (my $i = 0; $i <= $#fields; $i++) { |
72 | my $field = $fields[$i]; |
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73 | debug("PKG: Looking at field '$field'\n"); |
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74 | my $field_data = $table_data->{'fields'}->{$field}; |
75 | my @fdata = ("", $field); |
76 | $create .= "\n"; |
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77 | my $is_autoinc = 0; |
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78 | |
79 | # data type and size |
80 | my $data_type = lc $field_data->{'data_type'}; |
81 | my $list = $field_data->{'list'} || []; |
82 | my $commalist = join ",", @$list; |
83 | my $size; |
84 | |
85 | if ( $data_type eq 'set' ) { |
86 | $data_type = 'varchar'; |
87 | $size = length $commalist; |
88 | } |
89 | else { |
90 | $size = join( ', ', @{ $field_data->{'size'} || [] } ); |
91 | } |
92 | |
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93 | # SQLite is generally typeless, but newer versions will |
94 | # make a field autoincrement if it is declared as (and |
95 | # *only* as) INTEGER PRIMARY KEY |
96 | if ($field_data->{'is_auto_inc'}) { |
97 | $data_type = 'INTEGER PRIMARY KEY'; |
98 | $is_autoinc = 1; |
99 | } |
100 | |
101 | push @fdata, sprintf "%s%s", $data_type, (!$is_autoinc && $size) ? "($size)" : ''; |
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102 | |
103 | # MySQL qualifiers |
104 | # for my $qual ( qw[ binary unsigned zerofill ] ) { |
105 | # push @fdata, $qual |
106 | # if $field_data->{ $qual } || |
107 | # $field_data->{ uc $qual }; |
108 | # } |
109 | |
110 | # Null? |
111 | push @fdata, "NOT NULL" unless $field_data->{'null'}; |
112 | |
113 | # Default? XXX Need better quoting! |
114 | my $default = $field_data->{'default'}; |
115 | if ( defined $default ) { |
116 | if ( uc $default eq 'NULL') { |
117 | push @fdata, "DEFAULT NULL"; |
118 | } else { |
119 | push @fdata, "DEFAULT '$default'"; |
120 | } |
121 | } |
122 | |
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123 | |
124 | $create .= (join " ", '', @fdata); |
125 | $create .= "," unless ($i == $#fields); |
126 | } |
127 | # |
128 | # Indices |
129 | # |
130 | my @index_creates; |
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131 | my $idx_name_default = 'A'; |
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132 | for my $index ( @{ $table_data->{'indices'} || [] } ) { |
133 | my ($name, $type, $fields) = @{ $index }{ qw[ name type fields ] }; |
134 | $name ||= ''; |
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135 | my $index_type = $type eq 'unique' ? 'UNIQUE INDEX' : 'INDEX'; |
136 | $name = mk_name($table, $name || ++$idx_name_default); |
137 | push @index_creates, |
138 | "CREATE $index_type $name on $table ". |
139 | '(' . join( ', ', @$fields ) . ')'; |
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140 | } |
141 | |
142 | $create .= "\n);\n"; |
143 | |
144 | for my $index_create ( @index_creates ) { |
145 | $create .= "$index_create;\n"; |
146 | } |
147 | |
148 | $create .= "\n"; |
149 | } |
150 | |
151 | return $create; |
152 | } |
153 | |
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154 | |
155 | # ------------------------------------------------------------------- |
156 | sub mk_name { |
157 | my ($basename, $type, $scope, $critical) = @_; |
158 | my $basename_orig = $basename; |
159 | my $max_name = $type |
160 | ? $max_id_length - (length($type) + 1) |
161 | : $max_id_length; |
162 | $basename = substr( $basename, 0, $max_name ) |
163 | if length( $basename ) > $max_name; |
164 | my $name = $type ? "${type}_$basename" : $basename; |
165 | |
166 | if ( $basename ne $basename_orig and $critical ) { |
167 | my $show_type = $type ? "+'$type'" : ""; |
168 | warn "Truncating '$basename_orig'$show_type to $max_id_length ", |
169 | "character limit to make '$name'\n" if $WARN; |
170 | $truncated{ $basename_orig } = $name; |
171 | } |
172 | |
173 | $scope ||= \%global_names; |
174 | if ( my $prev = $scope->{ $name } ) { |
175 | my $name_orig = $name; |
176 | $name .= sprintf( "%02d", ++$prev ); |
177 | substr($name, $max_id_length - 3) = "00" |
178 | if length( $name ) > $max_id_length; |
179 | |
180 | warn "The name '$name_orig' has been changed to ", |
181 | "'$name' to make it unique.\n" if $WARN; |
182 | |
183 | $scope->{ $name_orig }++; |
184 | } |
185 | |
186 | $scope->{ $name }++; |
187 | return $name; |
188 | } |
189 | |
190 | 1; |
191 | __END__ |
192 | |
193 | =head1 NAME |
194 | |
195 | SQL::Translator::Producer::SQLite - SQLite-specific producer for SQL::Translator |
196 | |
197 | =head1 AUTHOR |
198 | |
199 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |