=over
+=item a scalar
+
+This contains one SQL statement to execute.
+
=item an array reference
This contains SQL statements to execute in order. Each element contains
my @info = @{$self->_dbi_connect_info || []};
$self->_dbh($self->_connect(@info));
+ $self->_conn_pid($$);
+ $self->_conn_tid(threads->tid) if $INC{'threads.pm'};
+
+ $self->_determine_driver;
+
# Always set the transaction depth on connect, since
# there is no transaction in progress by definition
$self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
- if(ref $self eq 'DBIx::Class::Storage::DBI') {
- my $driver = $self->_dbh->{Driver}->{Name};
+ my $connection_do = $self->on_connect_do;
+ $self->_do_connection_actions($connection_do) if $connection_do;
+}
+
+sub _determine_driver {
+ my ($self) = @_;
+
+ if (ref $self eq 'DBIx::Class::Storage::DBI') {
+ my $driver;
+
+ if ($self->_dbh) { # we are connected
+ $driver = $self->_dbh->{Driver}{Name};
+ } else {
+ # try to use dsn to not require being connected, the driver may still
+ # force a connection in _rebless to determine version
+ ($driver) = $self->_dbi_connect_info->[0] =~ /dbi:([^:]+):/i;
+ }
+
if ($self->load_optional_class("DBIx::Class::Storage::DBI::${driver}")) {
bless $self, "DBIx::Class::Storage::DBI::${driver}";
$self->_rebless();
}
}
-
- $self->_conn_pid($$);
- $self->_conn_tid(threads->tid) if $INC{'threads.pm'};
-
- my $connection_do = $self->on_connect_do;
- $self->_do_connection_actions($connection_do) if ref($connection_do);
}
sub _do_connection_actions {
my $self = shift;
my $connection_do = shift;
- if (ref $connection_do eq 'ARRAY') {
+ if (!ref $connection_do) {
+ $self->_do_query($connection_do);
+ }
+ elsif (ref $connection_do eq 'ARRAY') {
$self->_do_query($_) foreach @$connection_do;
}
elsif (ref $connection_do eq 'CODE') {
$connection_do->($self);
}
+ else {
+ $self->throw_exception (sprintf ("Don't know how to process conection actions of type '%s'", ref $connection_do) );
+ }
return $self;
}
return $self->_execute('delete' => [], $source, $bind_attrs, @_);
}
+# We were sent here because the $rs contains a complex search
+# which will require a subquery to select the correct rows
+# (i.e. joined or limited resultsets)
+#
+# Genarating a single PK column subquery is trivial and supported
+# by all RDBMS. However if we have a multicolumn PK, things get ugly.
+# Look at _multipk_update_delete()
+sub subq_update_delete {
+ my $self = shift;
+ my ($rs, $op, $values) = @_;
+
+ my $rsrc = $rs->result_source;
+
+ # we already check this, but double check naively just in case. Should be removed soon
+ my $sel = $rs->_resolved_attrs->{select};
+ $sel = [ $sel ] unless ref $sel eq 'ARRAY';
+ my @pcols = $rsrc->primary_columns;
+ if (@$sel != @pcols) {
+ $self->throw_exception (
+ 'Subquery update/delete can not be called on resultsets selecting a'
+ .' number of columns different than the number of primary keys'
+ );
+ }
+
+ if (@pcols == 1) {
+ return $self->$op (
+ $rsrc,
+ $op eq 'update' ? $values : (),
+ { $pcols[0] => { -in => $rs->as_query } },
+ );
+ }
+
+ else {
+ return $self->_multipk_update_delete (@_);
+ }
+}
+
+# ANSI SQL does not provide a reliable way to perform a multicol-PK
+# resultset update/delete involving subqueries. So by default resort
+# to simple (and inefficient) delete_all style per-row opearations,
+# while allowing specific storages to override this with a faster
+# implementation.
+#
+sub _multipk_update_delete {
+ return shift->_per_row_update_delete (@_);
+}
+
+# This is the default loop used to delete/update rows for multi PK
+# resultsets, and used by mysql exclusively (because it can't do anything
+# else).
+#
+# We do not use $row->$op style queries, because resultset update/delete
+# is not expected to cascade (this is what delete_all/update_all is for).
+#
+# There should be no race conditions as the entire operation is rolled
+# in a transaction.
+#
+sub _per_row_update_delete {
+ my $self = shift;
+ my ($rs, $op, $values) = @_;
+
+ my $rsrc = $rs->result_source;
+ my @pcols = $rsrc->primary_columns;
+
+ my $guard = $self->txn_scope_guard;
+
+ my $subrs_cur = $rs->cursor;
+ while (my @pks = $subrs_cur->next) {
+
+ my $cond;
+ for my $i (0.. $#pcols) {
+ $cond->{$pcols[$i]} = $pks[$i];
+ }
+
+ $self->$op (
+ $rsrc,
+ $op eq 'update' ? $values : (),
+ $cond,
+ );
+ }
+
+ $guard->commit;
+
+ return 1;
+}
+
sub _select {
my $self = shift;
my $sql_maker = $self->sql_maker;
my ($self, $schema, $databases, $version, $dir, $preversion, $sqltargs) = @_;
if(!$dir || !-d $dir) {
- warn "No directory given, using ./\n";
+ carp "No directory given, using ./\n";
$dir = "./";
}
$databases ||= ['MySQL', 'SQLite', 'PostgreSQL'];
my $sqlt = SQL::Translator->new( $sqltargs );
$sqlt->parser('SQL::Translator::Parser::DBIx::Class');
- my $sqlt_schema = $sqlt->translate({ data => $schema }) or die $sqlt->error;
+ my $sqlt_schema = $sqlt->translate({ data => $schema })
+ or $self->throw_exception ($sqlt->error);
foreach my $db (@$databases) {
$sqlt->reset();
my $filename = $schema->ddl_filename($db, $version, $dir);
if (-e $filename && ($version eq $schema_version )) {
# if we are dumping the current version, overwrite the DDL
- warn "Overwriting existing DDL file - $filename";
+ carp "Overwriting existing DDL file - $filename";
unlink($filename);
}
my $output = $sqlt->translate;
if(!$output) {
- warn("Failed to translate to $db, skipping. (" . $sqlt->error . ")");
+ carp("Failed to translate to $db, skipping. (" . $sqlt->error . ")");
next;
}
if(!open($file, ">$filename")) {
my $prefilename = $schema->ddl_filename($db, $preversion, $dir);
if(!-e $prefilename) {
- warn("No previous schema file found ($prefilename)");
+ carp("No previous schema file found ($prefilename)");
next;
}
my $difffile = $schema->ddl_filename($db, $version, $dir, $preversion);
if(-e $difffile) {
- warn("Overwriting existing diff file - $difffile");
+ carp("Overwriting existing diff file - $difffile");
unlink($difffile);
}
my $t = SQL::Translator->new($sqltargs);
$t->debug( 0 );
$t->trace( 0 );
- $t->parser( $db ) or die $t->error;
- my $out = $t->translate( $prefilename ) or die $t->error;
+
+ $t->parser( $db )
+ or $self->throw_exception ($t->error);
+
+ my $out = $t->translate( $prefilename )
+ or $self->throw_exception ($t->error);
+
$source_schema = $t->schema;
- unless ( $source_schema->name ) {
- $source_schema->name( $prefilename );
- }
+
+ $source_schema->name( $prefilename )
+ unless ( $source_schema->name );
}
# The "new" style of producers have sane normalization and can support
# diffing a SQL file against a DBIC->SQLT schema. Old style ones don't
# And we have to diff parsed SQL against parsed SQL.
my $dest_schema = $sqlt_schema;
-
+
unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) {
my $t = SQL::Translator->new($sqltargs);
$t->debug( 0 );
$t->trace( 0 );
- $t->parser( $db ) or die $t->error;
- my $out = $t->translate( $filename ) or die $t->error;
+
+ $t->parser( $db )
+ or $self->throw_exception ($t->error);
+
+ my $out = $t->translate( $filename )
+ or $self->throw_exception ($t->error);
+
$dest_schema = $t->schema;
+
$dest_schema->name( $filename )
unless $dest_schema->name;
}
$self->dbh->do($line); # shouldn't be using ->dbh ?
};
if ($@) {
- warn qq{$@ (running "${line}")};
+ carp qq{$@ (running "${line}")};
}
$self->_query_end($line);
};