+sub drop_constraints {
+ my ($self, %params) = @_;
+
+ croak "Missing parameter 'table'" unless $params{table};
+ $params{type} ||= 'FOREIGN KEY';
+ $params{schema} ||= 'public';
+
+ my $constraints = $self->dbh->selectall_arrayref(<<SQL, undef, $params{type}, $params{schema}, $params{table});
+ SELECT constraint_name
+ FROM information_schema.table_constraints
+ WHERE (constraint_type = ?)
+ AND (table_schema = ?)
+ AND (table_name = ?)
+SQL
+
+ $self->db_query(qq|ALTER TABLE $params{schema}."$params{table}" DROP CONSTRAINT "${_}"|) for map { $_->[0] } @{ $constraints };
+}
+