I am working through our application looking for ways to eliminate seq
scans in our database. I am looking for some help with this query.
SELECT rev_desc FROM rev_code_desc WHERE rev_code = lpad('0300', 4, '0')
Is there anyway to make postgres use an index on this query?
Here is the table definition:
CREATE TABLE rev_code_desc
(
rev_code character(4) NOT NULL,
rev_desc text,
user_id character varying(12),
live_rec boolean DEFAULT true,
CONSTRAINT rev_code_desc_pkey PRIMARY KEY (rev_code)
)
Right now, I can't seem to get it to use an index for this type of
query. Of course, in our application it is SELECT rev_desc FROM
rev_code_desc WHERE rev_code = lpad(<program variable>, 4, '0').
Thanks for any help,
Chris
PG 8.1.3
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
