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1 | package SQL::Translator::Producer::SQLite; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # $Id: SQLite.pm,v 1.7 2003-10-04 01:21:36 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: 1.7 $ =~ /(\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 = ''; |
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52 | $create .= header_comment unless ($no_comments); |
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53 | $create .= "BEGIN TRANSACTION;\n\n"; |
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54 | |
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55 | my ( @index_defs, @constraint_defs, @trigger_defs ); |
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56 | for my $table ( $schema->get_tables ) { |
57 | my $table_name = $table->name; |
58 | debug("PKG: Looking at table '$table_name'\n"); |
59 | |
60 | my @fields = $table->get_fields or die "No fields in $table_name"; |
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61 | |
62 | # |
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63 | # Header. |
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64 | # |
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65 | $create .= "--\n-- Table: $table_name\n--\n" unless $no_comments; |
66 | $create .= qq[DROP TABLE $table_name;\n] if $add_drop_table; |
67 | $create .= "CREATE TABLE $table_name (\n"; |
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68 | |
69 | # |
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70 | # How many fields in PK? |
71 | # |
72 | my $pk = $table->primary_key; |
73 | my @pk_fields = $pk ? $pk->fields : (); |
74 | |
75 | # |
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76 | # Fields |
77 | # |
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78 | my ( @field_defs, $pk_set ); |
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79 | for my $field ( @fields ) { |
80 | my $field_name = $field->name; |
81 | debug("PKG: Looking at field '$field_name'\n"); |
82 | my $field_def = $field_name; |
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83 | |
84 | # data type and size |
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85 | my $size = $field->size; |
86 | my $data_type = $field->data_type; |
87 | $data_type = 'varchar' if lc $data_type eq 'set'; |
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88 | |
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89 | if ( $data_type =~ /timestamp/i ) { |
90 | push @trigger_defs, |
91 | "CREATE TRIGGER ts_${table_name} ". |
92 | "after insert on $table_name\n". |
93 | "begin\n". |
94 | " update $table_name set $field_name=timestamp() ". |
95 | "where id=new.id;\n". |
96 | "end;\n" |
97 | ; |
98 | |
99 | } |
100 | |
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101 | # |
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102 | # SQLite is generally typeless, but newer versions will |
103 | # make a field autoincrement if it is declared as (and |
104 | # *only* as) INTEGER PRIMARY KEY |
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105 | # |
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106 | if ( |
107 | $field->is_primary_key && |
108 | scalar @pk_fields == 1 && |
109 | ( |
110 | $data_type =~ /^int(eger)?$/i |
111 | || |
112 | ( $data_type =~ /^number?$/i && $size !~ /,/ ) |
113 | ) |
114 | ) { |
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115 | $data_type = 'INTEGER PRIMARY KEY'; |
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116 | $size = undef; |
117 | $pk_set = 1; |
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118 | } |
119 | |
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120 | $field_def .= sprintf " %s%s", $data_type, |
121 | ( !$field->is_auto_increment && $size ) ? "($size)" : ''; |
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122 | |
123 | # Null? |
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124 | $field_def .= ' NOT NULL' unless $field->is_nullable; |
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125 | |
126 | # Default? XXX Need better quoting! |
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127 | my $default = $field->default_value; |
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128 | if ( defined $default ) { |
129 | if ( uc $default eq 'NULL') { |
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130 | $field_def .= ' DEFAULT NULL'; |
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131 | } else { |
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132 | $field_def .= " DEFAULT '$default'"; |
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133 | } |
134 | } |
135 | |
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136 | push @field_defs, $field_def; |
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137 | } |
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138 | |
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139 | if ( |
140 | scalar @pk_fields > 1 |
141 | || |
142 | ( @pk_fields && !$pk_set ) |
143 | ) { |
144 | push @field_defs, 'PRIMARY KEY (' . join(', ', @pk_fields ) . ')'; |
145 | } |
146 | |
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147 | # |
148 | # Indices |
149 | # |
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150 | my $idx_name_default = 'A'; |
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151 | for my $index ( $table->get_indices ) { |
152 | my $name = $index->name; |
153 | $name = mk_name($table_name, $name || ++$idx_name_default); |
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154 | |
155 | # strip any field size qualifiers as SQLite doesn't like these |
156 | my @fields = map { s/\(\d+\)$//; $_ } $index->fields; |
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157 | push @index_defs, |
158 | "CREATE INDEX $name on $table_name ". |
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159 | '(' . join( ', ', @fields ) . ');'; |
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160 | } |
161 | |
162 | # |
163 | # Constraints |
164 | # |
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165 | my $c_name_default = 'A'; |
166 | for my $c ( $table->get_constraints ) { |
167 | next unless $c->type eq UNIQUE; |
168 | my $name = $c->name; |
169 | $name = mk_name($table_name, $name || ++$idx_name_default); |
170 | my @fields = $c->fields; |
171 | |
172 | push @constraint_defs, |
173 | "CREATE UNIQUE INDEX $name on $table_name ". |
174 | '(' . join( ', ', @fields ) . ')'; |
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175 | } |
176 | |
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177 | $create .= join(",\n", map { " $_" } @field_defs ) . "\n);\n"; |
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178 | |
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179 | $create .= "\n"; |
180 | } |
181 | |
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182 | for my $def ( @index_defs, @constraint_defs, @trigger_defs ) { |
183 | $create .= "$def\n"; |
184 | } |
185 | |
186 | $create .= "COMMIT;\n"; |
187 | |
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188 | return $create; |
189 | } |
190 | |
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191 | # ------------------------------------------------------------------- |
192 | sub mk_name { |
193 | my ($basename, $type, $scope, $critical) = @_; |
194 | my $basename_orig = $basename; |
195 | my $max_name = $type |
196 | ? $max_id_length - (length($type) + 1) |
197 | : $max_id_length; |
198 | $basename = substr( $basename, 0, $max_name ) |
199 | if length( $basename ) > $max_name; |
200 | my $name = $type ? "${type}_$basename" : $basename; |
201 | |
202 | if ( $basename ne $basename_orig and $critical ) { |
203 | my $show_type = $type ? "+'$type'" : ""; |
204 | warn "Truncating '$basename_orig'$show_type to $max_id_length ", |
205 | "character limit to make '$name'\n" if $WARN; |
206 | $truncated{ $basename_orig } = $name; |
207 | } |
208 | |
209 | $scope ||= \%global_names; |
210 | if ( my $prev = $scope->{ $name } ) { |
211 | my $name_orig = $name; |
212 | $name .= sprintf( "%02d", ++$prev ); |
213 | substr($name, $max_id_length - 3) = "00" |
214 | if length( $name ) > $max_id_length; |
215 | |
216 | warn "The name '$name_orig' has been changed to ", |
217 | "'$name' to make it unique.\n" if $WARN; |
218 | |
219 | $scope->{ $name_orig }++; |
220 | } |
221 | |
222 | $scope->{ $name }++; |
223 | return $name; |
224 | } |
225 | |
226 | 1; |
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227 | |
228 | =head1 NAME |
229 | |
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230 | SQL::Translator::Producer::SQLite - SQLite producer for SQL::Translator |
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231 | |
232 | =head1 AUTHOR |
233 | |
234 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |