Dynamic queries for Partitions

Hi,

When I run one query on one partitioned table.

Select * from customer where opendate = (date_trunc('month',
current_date)+'11 days'::interval)::date ;

This query will do that postgres will check all my partitions.

How can I do ?

Step 1 generate one sql that will be like "Select * from customer where
opendate = '2016-11-01' ;

Step 2 :: Then run code from step1.

Any advice?

//Bill