Postgres 改变视图添加列

Question

我想更改视图并在其中添加新列。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

问题是它显示：

[Err] ERROR: syntax error at or near "AS"

第一次接触view，求助:)

Answer 1

ALTER VIEW changes various auxiliary properties of a view. 
(If you want to modify the view's defining query, use CREATE OR REPLACE VIEW.)

使用CREATE OR REPLACE代替

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;

SOURCE

Postgres 改变视图添加列

Postgres alter view add column

postgresql

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