SYNOPSIS
my $crt_index = Monorail::Change::CreateIndex->new(
table => $idx->table->name,
name => $idx->name,
fields => scalar $idx->fields,
type => lc $idx->type,
options => scalar $idx->options,
);
print $crt_index->as_perl;
$crt_index->as_sql;
$crt_index->transform_dbix($dbix)