使用指定的列进行选择不起作用

Question

I have the following table in my PostgreSQL 10.1 database:

                                      Table "public.master_plan"
        Column        | Type | Collation | Nullable | Default | Storage  | Stats target | Description 
----------------------+------+-----------+----------+---------+----------+--------------+-------------
   start_time_utc     | text |           |          |         | extended |              | 
   duration           | text |           |          |         | extended |              | 
   date               | text |           |          |         | extended |              | 
   team               | text |           |          |         | extended |              | 
   spass_type         | text |           |          |         | extended |              | 
   target             | text |           |          |         | extended |              | 
   request_name       | text |           |          |         | extended |              | 
   library_definition | text |           |          |         | extended |              | 
   title              | text |           |          |         | extended |              | 
   description        | text |           |          |         | extended |              | 

When I try the following sql query:

select title from master_plan;

it returns following error:

ERROR:  column "title" does not exist
LINE 1: select title from master_plan;
               ^
HINT:  Perhaps you meant to reference the column "master_plan.  title".

What I'm doing wrong? This should work...

Answer 1

You have spaces in the name. Try this:

alter table master_plan rename column "  title" to title;
select title from master_plan;

or

alter table master_plan rename column "master_plan.  title" to title;
select title from master_plan;

You can see a running example at: http://rextester.com/LCXW46910