> db01=> \d junk_t
> Table "junk_t"
> Attribute | Type | Modifier
> -----------+---------+----------
> idx | integer | not null
> dat | integer |
> Index: junk_idx
Primary key is the combination of unique index + not null. In your case,
both are listed. For further details refer pg_indexes system view.
regards,
bhuvaneswaran
