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Postgresql Postgres更改视图添加列

postgresql view

Postgresql Postgres更改视图添加列,postgresql,view,Postgresql,View,我想更改一个视图并在其中添加一个新列。我有： ALTER VIEW folders_contents AS SELECT files.id, files.name, files.filesize, files.updated, files.deleted, FROM files UNION ALL SELECT folders.id, folders.name, 0 AS filesize, folders.updated,

我想更改一个视图并在其中添加一个新列。我有：

ALTER VIEW folders_contents
AS
SELECT files.id,
    files.name,
    files.filesize,
    files.updated,
    files.deleted,
   FROM files
UNION ALL
 SELECT folders.id,
    folders.name,
    0 AS filesize,
    folders.updated,
    folders.deleted,
    FROM folders
  ORDER BY 8, 2
GO
问题在于它表明：

[Err]错误：“AS”处或附近出现语法错误

这是我第一次处理视图，我需要一些帮助：）

改用
创建或替换

在您的情况下，它将类似于：


CREATE OR REPLACE VIEW folders_contents
AS
SELECT files.id,
    files.name,
    files.filesize,
    files.updated,
    files.deleted,
   FROM files
UNION ALL
 SELECT folders.id,
    folders.name,
    0 AS filesize,
    folders.updated,
    folders.deleted,
    FROM folders
  ORDER BY 8, 2;



Postgres中没有
GO
。而且，
alterview
与您认为的不同，问题在于：[Err]错误：无法从视图中删除“folders\u contents”详细信息：包含UNION、INTERSECT或EXCEPT的视图不可自动更新。

CREATE OR REPLACE VIEW folders_contents
AS
SELECT files.id,
    files.name,
    files.filesize,
    files.updated,
    files.deleted,
   FROM files
UNION ALL
 SELECT folders.id,
    folders.name,
    0 AS filesize,
    folders.updated,
    folders.deleted,
    FROM folders
  ORDER BY 8, 2;