Robert James wrote:
I would like to CLUSTER a table on its PRIMARY KEY. Now, I haven't
explicitly defined and named an index for this table - but the primary
key defines one. How can I tell Postgres to CLUSTER on it?
Get the index name:
\d tablename
Right at the bottom it will have the index names:
Indexes:
"a_pkey" PRIMARY KEY, btree (a)
then cluster:
# cluster tablename using a_pkey;
CLUSTER
Also: If I define an index on a PK, will Postgres make a second one, or
realize its redundnant?
Depends how you define it (I think). What's your create table statement
look like?
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