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1 | package SQL::Translator::Producer::SQLite; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: SQLite.pm,v 1.5 2003-06-11 04:00:44 kycl4rk 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::Schema::Constants; |
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28 | use SQL::Translator::Utils qw(debug header_comment); |
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29 | |
30 | use vars qw[ $VERSION $DEBUG $WARN ]; |
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31 | |
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32 | $VERSION = sprintf "%d.%02d", q$Revision: 1.5 $ =~ /(\d+)\.(\d+)/; |
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33 | $DEBUG = 0 unless defined $DEBUG; |
34 | $WARN = 0 unless defined $WARN; |
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35 | |
36 | my %used_identifiers = (); |
37 | my $max_id_length = 30; |
38 | my %global_names; |
39 | my %truncated; |
40 | |
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41 | sub produce { |
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42 | my $translator = shift; |
43 | local $DEBUG = $translator->debug; |
44 | local $WARN = $translator->show_warnings; |
45 | my $no_comments = $translator->no_comments; |
46 | my $add_drop_table = $translator->add_drop_table; |
47 | my $schema = $translator->schema; |
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48 | |
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49 | debug("PKG: Beginning production\n"); |
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50 | |
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51 | my $create = ''; |
52 | $create .= header_comment unless ($no_comments); |
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53 | |
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54 | for my $table ( $schema->get_tables ) { |
55 | my $table_name = $table->name; |
56 | debug("PKG: Looking at table '$table_name'\n"); |
57 | |
58 | my @fields = $table->get_fields or die "No fields in $table_name"; |
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59 | |
60 | # |
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61 | # Header. |
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62 | # |
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63 | $create .= "--\n-- Table: $table_name\n--\n" unless $no_comments; |
64 | $create .= qq[DROP TABLE $table_name;\n] if $add_drop_table; |
65 | $create .= "CREATE TABLE $table_name (\n"; |
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66 | |
67 | # |
68 | # Fields |
69 | # |
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70 | my @field_defs; |
71 | for my $field ( @fields ) { |
72 | my $field_name = $field->name; |
73 | debug("PKG: Looking at field '$field_name'\n"); |
74 | my $field_def = $field_name; |
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75 | |
76 | # data type and size |
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77 | my $size = $field->size; |
78 | my $data_type = $field->data_type; |
79 | $data_type = 'varchar' if lc $data_type eq 'set'; |
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80 | |
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81 | # |
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82 | # SQLite is generally typeless, but newer versions will |
83 | # make a field autoincrement if it is declared as (and |
84 | # *only* as) INTEGER PRIMARY KEY |
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85 | # |
86 | if ( $field->is_auto_increment && $field->is_primary_key ) { |
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87 | $data_type = 'INTEGER PRIMARY KEY'; |
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88 | } |
89 | |
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90 | $field_def .= sprintf " %s%s", $data_type, |
91 | ( !$field->is_auto_increment && $size ) ? "($size)" : ''; |
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92 | |
93 | # Null? |
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94 | $field_def .= ' NOT NULL' unless $field->is_nullable; |
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95 | |
96 | # Default? XXX Need better quoting! |
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97 | my $default = $field->default_value; |
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98 | if ( defined $default ) { |
99 | if ( uc $default eq 'NULL') { |
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100 | $field_def .= ' DEFAULT NULL'; |
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101 | } else { |
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102 | $field_def .= " DEFAULT '$default'"; |
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103 | } |
104 | } |
105 | |
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106 | push @field_defs, $field_def; |
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107 | } |
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108 | |
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109 | # |
110 | # Indices |
111 | # |
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112 | my @index_defs; |
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113 | my $idx_name_default = 'A'; |
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114 | for my $index ( $table->get_indices ) { |
115 | my $name = $index->name; |
116 | $name = mk_name($table_name, $name || ++$idx_name_default); |
117 | my @fields = $index->fields; |
118 | push @index_defs, |
119 | "CREATE INDEX $name on $table_name ". |
120 | '(' . join( ', ', @fields ) . ')'; |
121 | } |
122 | |
123 | # |
124 | # Constraints |
125 | # |
126 | my @constraint_defs; |
127 | my $c_name_default = 'A'; |
128 | for my $c ( $table->get_constraints ) { |
129 | next unless $c->type eq UNIQUE; |
130 | my $name = $c->name; |
131 | $name = mk_name($table_name, $name || ++$idx_name_default); |
132 | my @fields = $c->fields; |
133 | |
134 | push @constraint_defs, |
135 | "CREATE UNIQUE INDEX $name on $table_name ". |
136 | '(' . join( ', ', @fields ) . ')'; |
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137 | } |
138 | |
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139 | $create .= join(",\n", map { " $_" } @field_defs ) . "\n);\n"; |
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140 | |
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141 | for my $index_create ( @index_defs, @constraint_defs ) { |
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142 | $create .= "$index_create;\n"; |
143 | } |
144 | |
145 | $create .= "\n"; |
146 | } |
147 | |
148 | return $create; |
149 | } |
150 | |
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151 | # ------------------------------------------------------------------- |
152 | sub mk_name { |
153 | my ($basename, $type, $scope, $critical) = @_; |
154 | my $basename_orig = $basename; |
155 | my $max_name = $type |
156 | ? $max_id_length - (length($type) + 1) |
157 | : $max_id_length; |
158 | $basename = substr( $basename, 0, $max_name ) |
159 | if length( $basename ) > $max_name; |
160 | my $name = $type ? "${type}_$basename" : $basename; |
161 | |
162 | if ( $basename ne $basename_orig and $critical ) { |
163 | my $show_type = $type ? "+'$type'" : ""; |
164 | warn "Truncating '$basename_orig'$show_type to $max_id_length ", |
165 | "character limit to make '$name'\n" if $WARN; |
166 | $truncated{ $basename_orig } = $name; |
167 | } |
168 | |
169 | $scope ||= \%global_names; |
170 | if ( my $prev = $scope->{ $name } ) { |
171 | my $name_orig = $name; |
172 | $name .= sprintf( "%02d", ++$prev ); |
173 | substr($name, $max_id_length - 3) = "00" |
174 | if length( $name ) > $max_id_length; |
175 | |
176 | warn "The name '$name_orig' has been changed to ", |
177 | "'$name' to make it unique.\n" if $WARN; |
178 | |
179 | $scope->{ $name_orig }++; |
180 | } |
181 | |
182 | $scope->{ $name }++; |
183 | return $name; |
184 | } |
185 | |
186 | 1; |
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187 | |
188 | =head1 NAME |
189 | |
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190 | SQL::Translator::Producer::SQLite - SQLite producer for SQL::Translator |
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191 | |
192 | =head1 AUTHOR |
193 | |
194 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |