Re: temp table indexes

Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Andrew Bartley wrote:
>> The testing I have already done, an index is by far better in this
>> circumstance.

> If it is a non-temp table with the same data and VACUUM ANALYZE, does it
> use an index?

The default stats values used in the absence of any VACUUM are supposed
to yield an index search.  Temp-ness is irrelevant.  For example:

regression=# create temp table foo (f1 int primary key);
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index 'foo_pkey' for table 'foo'
CREATE
regression=# explain select * from foo where f1 = 42;
INFO:  QUERY PLAN:

Index Scan using foo_pkey on foo  (cost=0.00..4.82 rows=1 width=4)
  indxqual: (f1 = 42)

EXPLAIN

I'd be interested to see the details of Andrew's example where this
does not happen.

            regards, tom lane