As you know version 11 gives us the possibility to include aditional columns
to an index.
So, if I recreate all my primary key indexes to contain a description
column, like ...
CREATE UNIQUE INDEX CONCURRENTLY Products_pk ON Products(Product_ID)
INCLUDE(Name);
ALTER TABLE Products ADD CONSTRAINT Products_pk PRIMARY KEY(Product_ID)
USING INDEX Products_pk
Then, when I do
select Item_ID, Product_ID, Name from Items inner join Products
using(Product_ID)
I thought It would do a index scan only for Products table, but it does not,
why ?
What do I need do to use index scan only when searching Product_ID and Name
on table Products ?
--
Sent from: http://www.postgresql-archive.org/PostgreSQL-general-f1843780.html
