創建視圖的Postgres SQL與評論

Question

我創建的Postgres SQL視圖與SQL語句

CREATE OR REPLACE VIEW {ViewName} as 
Select 
..... 

我問有沒有什麼方法來創建視圖的列註釋。 創建視圖後，它生成時的註釋被添加到列的錯誤：

ERROR: "{ViewName}" is not a table, composite type, or foreign table.

Answer 1

要定義上一列（或一視圖）註釋使用comment on：

create view some_view 
as 
select x as col1, y as col2, z as col3 
from some_table; 

然後：

comment on view some_view is 'Some View'; 
comment on column some_view.col1 is 'Originally column X';