X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSQL%2FTranslator%2FProducer%2FSQLite.pm;h=9eeeaa30d0a2daad3c1c44f3f9ba72aa204f81f3;hb=d0fcb05d6b4b6126e080ff90558da0cc31c06b78;hp=2ba8aff2929be064e7215e4bca6d7001e7a1e713;hpb=bfb5a56826726f1c0da047c5bd4864facfc00964;p=dbsrgits%2FSQL-Translator.git diff --git a/lib/SQL/Translator/Producer/SQLite.pm b/lib/SQL/Translator/Producer/SQLite.pm index 2ba8aff..9eeeaa3 100644 --- a/lib/SQL/Translator/Producer/SQLite.pm +++ b/lib/SQL/Translator/Producer/SQLite.pm @@ -1,9 +1,9 @@ package SQL::Translator::Producer::SQLite; # ------------------------------------------------------------------- -# $Id: SQLite.pm,v 1.14 2006-07-23 14:03:52 schiffbruechige Exp $ +# $Id$ # ------------------------------------------------------------------- -# Copyright (C) 2002-4 SQLFairy Authors +# Copyright (C) 2002-2009 SQLFairy Authors # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License as @@ -38,20 +38,20 @@ This module will produce text output of the schema suitable for SQLite. =cut use strict; +use warnings; use Data::Dumper; use SQL::Translator::Schema::Constants; use SQL::Translator::Utils qw(debug header_comment); -use vars qw[ $VERSION $DEBUG $WARN ]; +use vars qw[ $DEBUG $WARN ]; -$VERSION = sprintf "%d.%02d", q$Revision: 1.14 $ =~ /(\d+)\.(\d+)/; $DEBUG = 0 unless defined $DEBUG; $WARN = 0 unless defined $WARN; -my %used_identifiers = (); -my $max_id_length = 30; -my %global_names; -my %truncated; +our %used_identifiers = (); +our $max_id_length = 30; +our %global_names; +our %truncated; sub produce { my $translator = shift; @@ -60,33 +60,50 @@ sub produce { my $no_comments = $translator->no_comments; my $add_drop_table = $translator->add_drop_table; my $schema = $translator->schema; + my $producer_args = $translator->producer_args; + my $sqlite_version = $producer_args->{sqlite_version} || 0; debug("PKG: Beginning production\n"); - my $create = ''; - $create .= header_comment unless ($no_comments); - $create .= "BEGIN TRANSACTION;\n\n"; + my @create = (); + push @create, header_comment unless ($no_comments); + $create[0] .= "\n\nBEGIN TRANSACTION"; - my @table_defs = (); for my $table ( $schema->get_tables ) { - push @table_defs, create_table($table, { no_comment => $no_comments, - add_drop_table => $add_drop_table,}); + push @create, create_table($table, { no_comments => $no_comments, + sqlite_version => $sqlite_version, + add_drop_table => $add_drop_table,}); + } + + for my $view ( $schema->get_views ) { + push @create, create_view($view, { + add_drop_view => $add_drop_table, + no_comments => $no_comments, + }); } -# $create .= "COMMIT;\n"; + for my $trigger ( $schema->get_triggers ) { + push @create, create_trigger($trigger, { + add_drop_trigger => $add_drop_table, + no_comments => $no_comments, + }); + } - return wantarray ? ($create, @table_defs, "COMMIT;\n") : join("\n", ($create, @table_defs, "COMMIT;\n")); + return wantarray ? (@create, "COMMIT") : join(";\n\n", (@create, "COMMIT;\n")); } # ------------------------------------------------------------------- sub mk_name { my ($basename, $type, $scope, $critical) = @_; my $basename_orig = $basename; - my $max_name = $type - ? $max_id_length - (length($type) + 1) - : $max_id_length; + my $max_name = !$max_id_length + ? length($type) + 1 + : $type + ? $max_id_length - (length($type) + 1) + : $max_id_length; $basename = substr( $basename, 0, $max_name ) if length( $basename ) > $max_name; + $basename =~ s/\./_/g; my $name = $type ? "${type}_$basename" : $basename; if ( $basename ne $basename_orig and $critical ) { @@ -113,6 +130,31 @@ sub mk_name { return $name; } +sub create_view { + my ($view, $options) = @_; + my $add_drop_view = $options->{add_drop_view}; + + my $view_name = $view->name; + debug("PKG: Looking at view '${view_name}'\n"); + + # Header. Should this look like what mysqldump produces? + my $extra = $view->extra; + my $create = ''; + $create .= "--\n-- View: ${view_name}\n--\n" unless $options->{no_comments}; + $create .= "DROP VIEW IF EXISTS $view_name;\n" if $add_drop_view; + $create .= 'CREATE'; + $create .= " TEMPORARY" if exists($extra->{temporary}) && $extra->{temporary}; + $create .= ' VIEW'; + $create .= " IF NOT EXISTS" if exists($extra->{if_not_exists}) && $extra->{if_not_exists}; + $create .= " ${view_name}"; + + if( my $sql = $view->sql ){ + $create .= " AS\n ${sql}"; + } + return $create; +} + + sub create_table { my ($table, $options) = @_; @@ -120,27 +162,36 @@ sub create_table my $table_name = $table->name; my $no_comments = $options->{no_comments}; my $add_drop_table = $options->{add_drop_table}; + my $sqlite_version = $options->{sqlite_version} || 0; debug("PKG: Looking at table '$table_name'\n"); - my ( @index_defs, @constraint_defs, @trigger_defs ); + my ( @index_defs, @constraint_defs ); my @fields = $table->get_fields or die "No fields in $table_name"; + my $temp = $options->{temporary_table} ? 'TEMPORARY ' : ''; # # Header. # - my $create = ''; - $create .= "--\n-- Table: $table_name\n--\n" unless $no_comments; - $create .= qq[DROP TABLE $table_name;\n] if $add_drop_table; - $create .= "CREATE TABLE $table_name (\n"; + my $exists = ($sqlite_version >= 3.3) ? ' IF EXISTS' : ''; + my @create; + my ($comment, $create_table) = ""; + $comment = "--\n-- Table: $table_name\n--\n" unless $no_comments; + if ($add_drop_table) { + push @create, $comment . qq[DROP TABLE$exists $table_name]; + } else { + $create_table = $comment; + } + + $create_table .= "CREATE ${temp}TABLE $table_name (\n"; # # Comments # if ( $table->comments and !$no_comments ){ - $create .= "-- Comments: \n-- "; - $create .= join "\n-- ", $table->comments; - $create .= "\n--\n\n"; + $create_table .= "-- Comments: \n-- "; + $create_table .= join "\n-- ", $table->comments; + $create_table .= "\n--\n\n"; } # @@ -182,14 +233,9 @@ sub create_table push @constraint_defs, create_constraint($c); } - $create .= join(",\n", map { " $_" } @field_defs ) . "\n);\n"; - - $create .= "\n"; + $create_table .= join(",\n", map { " $_" } @field_defs ) . "\n)"; - for my $def ( @index_defs, @constraint_defs, @trigger_defs ) { - $create .= "$def\n"; - } - return $create; + return (@create, $create_table, @index_defs, @constraint_defs ); } sub create_field @@ -256,17 +302,16 @@ sub create_field # Default? XXX Need better quoting! my $default = $field->default_value; - if ( defined $default ) { - if ( uc $default eq 'NULL') { - $field_def .= ' DEFAULT NULL'; - } elsif ( $default eq 'now()' || - $default eq 'CURRENT_TIMESTAMP' ) { - $field_def .= ' DEFAULT CURRENT_TIMESTAMP'; - } elsif ( $default =~ /val\(/ ) { - next; - } else { - $field_def .= " DEFAULT '$default'"; - } + if (defined $default) { + SQL::Translator::Producer->_apply_default_value( + \$field_def, + $default, + [ + 'NULL' => \'NULL', + 'now()' => 'now()', + 'CURRENT_TIMESTAMP' => 'CURRENT_TIMESTAMP', + ], + ); } return $field_def; @@ -278,13 +323,17 @@ sub create_index my ($index, $options) = @_; my $name = $index->name; - $name = mk_name($index->table->name, $name); # || ++$idx_name_default); + $name = mk_name($index->table->name, $name); + + my $type = $index->type eq 'UNIQUE' ? "UNIQUE " : ''; # strip any field size qualifiers as SQLite doesn't like these my @fields = map { s/\(\d+\)$//; $_ } $index->fields; + (my $index_table_name = $index->table->name) =~ s/^.+?\.//; # table name may not specify schema + warn "removing schema name from '" . $index->table->name . "' to make '$index_table_name'\n" if $WARN; my $index_def = - "CREATE INDEX $name on " . $index->table->name . - ' (' . join( ', ', @fields ) . ');'; + "CREATE ${type}INDEX $name ON " . $index_table_name . + ' (' . join( ', ', @fields ) . ')'; return $index_def; } @@ -294,16 +343,174 @@ sub create_constraint my ($c, $options) = @_; my $name = $c->name; - $name = mk_name($c->table->name, $name); # || ++$idx_name_default); + $name = mk_name($c->table->name, $name); my @fields = $c->fields; + (my $index_table_name = $c->table->name) =~ s/^.+?\.//; # table name may not specify schema + warn "removing schema name from '" . $c->table->name . "' to make '$index_table_name'\n" if $WARN; my $c_def = - "CREATE UNIQUE INDEX $name on " . $c->table->name . - ' (' . join( ', ', @fields ) . ');'; + "CREATE UNIQUE INDEX $name ON " . $index_table_name . + ' (' . join( ', ', @fields ) . ')'; return $c_def; } +sub create_trigger { + my ($trigger, $options) = @_; + my $add_drop = $options->{add_drop_trigger}; + + my $name = $trigger->name; + my @create; + + push @create, "DROP TRIGGER IF EXISTS $name" if $add_drop; + + my $events = $trigger->database_events; + die "Can't handle multiple events in triggers" if @$events > 1; + + my $action = ""; + + $action = $trigger->ation->{for_each} . " " + if $trigger->action->{for_each}; + + $action = $trigger->action->{when} . " " + if $trigger->action->{when}; + + my $steps = $trigger->action->{steps} || []; + + $action .= "BEGIN "; + for (@$steps) { + $action .= $_ . "; " + } + $action .= "END"; + + push @create, "CREATE TRIGGER $name " . + $trigger->perform_action_when . " " . + $events->[0] . + " on " . $trigger->on_table . " " . + $action; + + return @create; + +} + +sub alter_table { } # Noop + +sub add_field { + my ($field) = @_; + + return sprintf("ALTER TABLE %s ADD COLUMN %s", + $field->table->name, create_field($field)) +} + +sub alter_create_index { + my ($index) = @_; + + # This might cause name collisions + return create_index($index); +} + +sub alter_create_constraint { + my ($constraint) = @_; + + return create_constraint($constraint) if $constraint->type eq 'UNIQUE'; +} + +sub alter_drop_constraint { alter_drop_index(@_) } + +sub alter_drop_index { + my ($constraint) = @_; + + return sprintf("DROP INDEX %s", + $constraint->name); +} + +sub batch_alter_table { + my ($table, $diffs) = @_; + + # If we have any of the following + # + # rename_field + # alter_field + # drop_field + # + # we need to do the following + # + # BEGIN TRANSACTION; + # CREATE TEMPORARY TABLE t1_backup(a,b); + # INSERT INTO t1_backup SELECT a,b FROM t1; + # DROP TABLE t1; + # CREATE TABLE t1(a,b); + # INSERT INTO t1 SELECT a,b FROM t1_backup; + # DROP TABLE t1_backup; + # COMMIT; + # + # Fun, eh? + # + # If we have rename_field we do similarly. + + my $table_name = $table->name; + my $renaming = $diffs->{rename_table} && @{$diffs->{rename_table}}; + + if ( @{$diffs->{rename_field}} == 0 && + @{$diffs->{alter_field}} == 0 && + @{$diffs->{drop_field}} == 0 + ) { +# return join("\n", map { + return map { + my $meth = __PACKAGE__->can($_) or die __PACKAGE__ . " cant $_"; + map { my $sql = $meth->(ref $_ eq 'ARRAY' ? @$_ : $_); $sql ? ("$sql") : () } @{ $diffs->{$_} } + + } grep { @{$diffs->{$_}} } + qw/rename_table + alter_drop_constraint + alter_drop_index + drop_field + add_field + alter_field + rename_field + alter_create_index + alter_create_constraint + alter_table/; + } + + + my @sql; + my $old_table = $renaming ? $diffs->{rename_table}[0][0] : $table; + + do { + local $table->{name} = $table_name . '_temp_alter'; + # We only want the table - dont care about indexes on tmp table + my ($table_sql) = create_table($table, {no_comments => 1, temporary_table => 1}); + push @sql,$table_sql; + }; + + push @sql, "INSERT INTO @{[$table_name]}_temp_alter SELECT @{[ join(', ', $old_table->get_fields)]} FROM @{[$old_table]}", + "DROP TABLE @{[$old_table]}", + create_table($table, { no_comments => 1 }), + "INSERT INTO @{[$table_name]} SELECT @{[ join(', ', $old_table->get_fields)]} FROM @{[$table_name]}_temp_alter", + "DROP TABLE @{[$table_name]}_temp_alter"; + + return @sql; +# return join("", @sql, ""); +} + +sub drop_table { + my ($table) = @_; + return "DROP TABLE $table"; +} + +sub rename_table { + my ($old_table, $new_table, $options) = @_; + + my $qt = $options->{quote_table_names} || ''; + + return "ALTER TABLE $qt$old_table$qt RENAME TO $qt$new_table$qt"; + +} + +# No-op. Just here to signify that we are a new style parser. +sub preproces_schema { } + 1; =pod @@ -314,6 +521,8 @@ SQL::Translator, http://www.sqlite.org/. =head1 AUTHOR -Ken Y. Clark Ekclark@cpan.orgE. +Ken Y. Clark C<< >>. + +Diff code added by Ash Berlin C<< >>. =cut