1 package SQL::Translator::Producer::SQLite;
3 # -------------------------------------------------------------------
5 # -------------------------------------------------------------------
6 # Copyright (C) 2002-2009 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::SQLite - SQLite producer for SQL::Translator
31 my $t = SQL::Translator->new( parser => '...', producer => 'SQLite' );
36 This module will produce text output of the schema suitable for SQLite.
42 use SQL::Translator::Schema::Constants;
43 use SQL::Translator::Utils qw(debug header_comment);
45 use vars qw[ $DEBUG $WARN ];
47 $DEBUG = 0 unless defined $DEBUG;
48 $WARN = 0 unless defined $WARN;
50 my %used_identifiers = ();
51 my $max_id_length = 30;
56 my $translator = shift;
57 local $DEBUG = $translator->debug;
58 local $WARN = $translator->show_warnings;
59 my $no_comments = $translator->no_comments;
60 my $add_drop_table = $translator->add_drop_table;
61 my $schema = $translator->schema;
62 my $producer_args = $translator->producer_args;
63 my $sqlite_version = $producer_args->{sqlite_version} || 0;
65 debug("PKG: Beginning production\n");
68 push @create, header_comment unless ($no_comments);
69 push @create, 'BEGIN TRANSACTION';
71 for my $table ( $schema->get_tables ) {
72 push @create, create_table($table, { no_comments => $no_comments,
73 sqlite_version => $sqlite_version,
74 add_drop_table => $add_drop_table,});
77 for my $view ( $schema->get_views ) {
78 push @create, create_view($view, {
79 add_drop_view => $add_drop_table,
80 no_comments => $no_comments,
84 return wantarray ? (@create, "COMMIT") : join(";\n\n", (@create, "COMMIT;\n"));
87 # -------------------------------------------------------------------
89 my ($basename, $type, $scope, $critical) = @_;
90 my $basename_orig = $basename;
92 ? $max_id_length - (length($type) + 1)
94 $basename = substr( $basename, 0, $max_name )
95 if length( $basename ) > $max_name;
96 $basename =~ s/\./_/g;
97 my $name = $type ? "${type}_$basename" : $basename;
99 if ( $basename ne $basename_orig and $critical ) {
100 my $show_type = $type ? "+'$type'" : "";
101 warn "Truncating '$basename_orig'$show_type to $max_id_length ",
102 "character limit to make '$name'\n" if $WARN;
103 $truncated{ $basename_orig } = $name;
106 $scope ||= \%global_names;
107 if ( my $prev = $scope->{ $name } ) {
108 my $name_orig = $name;
109 $name .= sprintf( "%02d", ++$prev );
110 substr($name, $max_id_length - 3) = "00"
111 if length( $name ) > $max_id_length;
113 warn "The name '$name_orig' has been changed to ",
114 "'$name' to make it unique.\n" if $WARN;
116 $scope->{ $name_orig }++;
124 my ($view, $options) = @_;
125 my $add_drop_view = $options->{add_drop_view};
127 my $view_name = $view->name;
128 debug("PKG: Looking at view '${view_name}'\n");
130 # Header. Should this look like what mysqldump produces?
131 my $extra = $view->extra;
133 $create .= "--\n-- View: ${view_name}\n--\n" unless $options->{no_comments};
134 $create .= "DROP VIEW IF EXISTS $view_name;\n" if $add_drop_view;
136 $create .= " TEMPORARY" if exists($extra->{temporary}) && $extra->{temporary};
138 $create .= " IF NOT EXISTS" if exists($extra->{if_not_exists}) && $extra->{if_not_exists};
139 $create .= " ${view_name}";
141 if( my $sql = $view->sql ){
142 $create .= " AS\n ${sql}";
150 my ($table, $options) = @_;
152 my $table_name = $table->name;
153 my $no_comments = $options->{no_comments};
154 my $add_drop_table = $options->{add_drop_table};
155 my $sqlite_version = $options->{sqlite_version} || 0;
157 debug("PKG: Looking at table '$table_name'\n");
159 my ( @index_defs, @constraint_defs, @trigger_defs );
160 my @fields = $table->get_fields or die "No fields in $table_name";
162 my $temp = $options->{temporary_table} ? 'TEMPORARY ' : '';
166 my $exists = ($sqlite_version >= 3.3) ? ' IF EXISTS' : '';
168 push @create, "--\n-- Table: $table_name\n--\n" unless $no_comments;
169 push @create, qq[DROP TABLE$exists $table_name] if $add_drop_table;
170 my $create_table = "CREATE ${temp}TABLE $table_name (\n";
175 if ( $table->comments and !$no_comments ){
176 $create_table .= "-- Comments: \n-- ";
177 $create_table .= join "\n-- ", $table->comments;
178 $create_table .= "\n--\n\n";
182 # How many fields in PK?
184 my $pk = $table->primary_key;
185 my @pk_fields = $pk ? $pk->fields : ();
190 my ( @field_defs, $pk_set );
191 for my $field ( @fields ) {
192 push @field_defs, create_field($field);
196 scalar @pk_fields > 1
198 ( @pk_fields && !grep /INTEGER PRIMARY KEY/, @field_defs )
200 push @field_defs, 'PRIMARY KEY (' . join(', ', @pk_fields ) . ')';
206 my $idx_name_default = 'A';
207 for my $index ( $table->get_indices ) {
208 push @index_defs, create_index($index);
214 my $c_name_default = 'A';
215 for my $c ( $table->get_constraints ) {
216 next unless $c->type eq UNIQUE;
217 push @constraint_defs, create_constraint($c);
220 $create_table .= join(",\n", map { " $_" } @field_defs ) . "\n)";
222 return (@create, $create_table, @index_defs, @constraint_defs, @trigger_defs );
227 my ($field, $options) = @_;
229 my $field_name = $field->name;
230 debug("PKG: Looking at field '$field_name'\n");
231 my $field_comments = $field->comments
232 ? "-- " . $field->comments . "\n "
235 my $field_def = $field_comments.$field_name;
238 my $size = $field->size;
239 my $data_type = $field->data_type;
240 $data_type = 'varchar' if lc $data_type eq 'set';
241 $data_type = 'blob' if lc $data_type eq 'bytea';
243 if ( lc $data_type =~ /(text|blob)/i ) {
247 # if ( $data_type =~ /timestamp/i ) {
248 # push @trigger_defs,
249 # "CREATE TRIGGER ts_${table_name} ".
250 # "after insert on $table_name\n".
252 # " update $table_name set $field_name=timestamp() ".
253 # "where id=new.id;\n".
260 # SQLite is generally typeless, but newer versions will
261 # make a field autoincrement if it is declared as (and
262 # *only* as) INTEGER PRIMARY KEY
264 my $pk = $field->table->primary_key;
265 my @pk_fields = $pk ? $pk->fields : ();
268 $field->is_primary_key &&
269 scalar @pk_fields == 1 &&
271 $data_type =~ /int(eger)?$/i
273 ( $data_type =~ /^number?$/i && $size !~ /,/ )
276 $data_type = 'INTEGER PRIMARY KEY';
281 $field_def .= sprintf " %s%s", $data_type,
282 ( !$field->is_auto_increment && $size ) ? "($size)" : '';
285 $field_def .= ' NOT NULL' unless $field->is_nullable;
287 # Default? XXX Need better quoting!
288 my $default = $field->default_value;
289 if (defined $default) {
290 SQL::Translator::Producer->_apply_default_value(
296 'CURRENT_TIMESTAMP' => 'CURRENT_TIMESTAMP',
307 my ($index, $options) = @_;
309 my $name = $index->name;
310 $name = mk_name($index->table->name, $name);
312 my $type = $index->type eq 'UNIQUE' ? "UNIQUE " : '';
314 # strip any field size qualifiers as SQLite doesn't like these
315 my @fields = map { s/\(\d+\)$//; $_ } $index->fields;
316 (my $index_table_name = $index->table->name) =~ s/^.+?\.//; # table name may not specify schema
317 warn "removing schema name from '" . $index->table->name . "' to make '$index_table_name'\n" if $WARN;
319 "CREATE ${type}INDEX $name ON " . $index_table_name .
320 ' (' . join( ', ', @fields ) . ')';
325 sub create_constraint
327 my ($c, $options) = @_;
330 $name = mk_name($c->table->name, $name);
331 my @fields = $c->fields;
332 (my $index_table_name = $c->table->name) =~ s/^.+?\.//; # table name may not specify schema
333 warn "removing schema name from '" . $c->table->name . "' to make '$index_table_name'\n" if $WARN;
336 "CREATE UNIQUE INDEX $name ON " . $index_table_name .
337 ' (' . join( ', ', @fields ) . ')';
342 sub alter_table { } # Noop
347 return sprintf("ALTER TABLE %s ADD COLUMN %s",
348 $field->table->name, create_field($field))
351 sub alter_create_index {
354 # This might cause name collisions
355 return create_index($index);
358 sub alter_create_constraint {
359 my ($constraint) = @_;
361 return create_constraint($constraint) if $constraint->type eq 'UNIQUE';
364 sub alter_drop_constraint { alter_drop_index(@_) }
366 sub alter_drop_index {
367 my ($constraint) = @_;
369 return sprintf("DROP INDEX %s",
373 sub batch_alter_table {
374 my ($table, $diffs) = @_;
376 # If we have any of the following
382 # we need to do the following <http://www.sqlite.org/faq.html#q11>
385 # CREATE TEMPORARY TABLE t1_backup(a,b);
386 # INSERT INTO t1_backup SELECT a,b FROM t1;
388 # CREATE TABLE t1(a,b);
389 # INSERT INTO t1 SELECT a,b FROM t1_backup;
390 # DROP TABLE t1_backup;
395 # If we have rename_field we do similarly.
397 my $table_name = $table->name;
398 my $renaming = $diffs->{rename_table} && @{$diffs->{rename_table}};
400 if ( @{$diffs->{rename_field}} == 0 &&
401 @{$diffs->{alter_field}} == 0 &&
402 @{$diffs->{drop_field}} == 0
404 # return join("\n", map {
406 my $meth = __PACKAGE__->can($_) or die __PACKAGE__ . " cant $_";
407 map { my $sql = $meth->(ref $_ eq 'ARRAY' ? @$_ : $_); $sql ? ("$sql") : () } @{ $diffs->{$_} }
409 } grep { @{$diffs->{$_}} }
411 alter_drop_constraint
418 alter_create_constraint
424 my $old_table = $renaming ? $diffs->{rename_table}[0][0] : $table;
427 local $table->{name} = $table_name . '_temp_alter';
428 # We only want the table - dont care about indexes on tmp table
429 my ($table_sql) = create_table($table, {no_comments => 1, temporary_table => 1});
430 push @sql,$table_sql;
433 push @sql, "INSERT INTO @{[$table_name]}_temp_alter SELECT @{[ join(', ', $old_table->get_fields)]} FROM @{[$old_table]}",
434 "DROP TABLE @{[$old_table]}",
435 create_table($table, { no_comments => 1 }),
436 "INSERT INTO @{[$table_name]} SELECT @{[ join(', ', $old_table->get_fields)]} FROM @{[$table_name]}_temp_alter",
437 "DROP TABLE @{[$table_name]}_temp_alter";
440 # return join("", @sql, "");
445 return "DROP TABLE $table";
449 my ($old_table, $new_table, $options) = @_;
451 my $qt = $options->{quote_table_names} || '';
453 return "ALTER TABLE $qt$old_table$qt RENAME TO $qt$new_table$qt";
457 # No-op. Just here to signify that we are a new style parser.
458 sub preproces_schema { }
466 SQL::Translator, http://www.sqlite.org/.
470 Ken Y. Clark C<< <kclark@cpan.orgE> >>.
472 Diff code added by Ash Berlin C<< <ash@cpan.org> >>.