PostgreSQL: Create table if not exists AS

Question

I\'m using PostgreSQL and am an SQL beginner. I\'m trying to create a table from a query, and if I run:

CREATE TABLE table_name AS
   (....query...)
<         


        

Answer 1

Use do :

do $$ begin

if not exists (  SELECT 1
   FROM   information_schema.tables 
   WHERE  table_schema = 'schema_name'
   AND    table_name = 'bla ') then

  create table schema_name.bla as select * from blu;
end if;

end $$;