How do I declare variables in pgAdmin

Question

If I am in the psql terminal then I can declare and use a variable like this:

\\set message_id soifsdaofisd.gmail.com;
select * from emails where message_id = \'         


        

Answer 1

When trying to run scripts in pgAdmin I wanted the something similar where i wanted to store a value to use across multiple queries. This is what I found which is similar to SQL

set session vars.batch_id = '82';

select * from batches where batch_id = current_setting('vars.batch_id')::int;