Redshift 从 CTE 插入表

Question

根据 Redshift WITH Clause documentation，您可以将WITH 子句与

INSERT INTO...SELECT

语句一起使用。但是，在测试时，我收到以下错误。这是不可能的，还是我的语法错误？

CREATE TABLE TestCTEInsert (SomeTimestamp TIMESTAMP);
WITH CTE AS
(SELECT GETDATE() as SomeTimestamp)
INSERT INTO TestCTEInsert
    (SomeTimestamp) SELECT SomeTimestamp from CTE;

错误：42601：“插入”处或附近有语法错误

有趣的是，它确实支持插入到新表中，即

WITH CTE AS
(SELECT GETDATE() as SomeTimestamp)
INSERT SomeTimestamp INTO NewTable 
SELECT SomeTimestamp from CTE;

命令成功完成（受影响 1 行）

编辑：只是为了确认，当使用

INTEGER

列而不是

TIMESTAMP

时，我遇到了同样的错误：

CREATE TABLE TestCTE (SomeInt INTEGER);
WITH CTE AS
(SELECT 1 as SomeInt)
INSERT INTO TestCTEInsert 
SELECT SomeInt from CTE;

错误：42601：“插入”处或附近有语法错误

Answer 1

尝试将 CTE 放入插件中（不确定这是否符合要求）

INSERT INTO TestCTEInsert
WITH CTE AS
(SELECT CURRENT_TIMESTAMP as SomeTimestamp)
SELECT SomeTimestamp from CTE;

Answer 2

;

终止一条语句，所以它需要放在语句的末尾，而不是中间的某个地方：

您可以通过两种方式执行此操作，或者使用

create table as select

create table TestCTEInsert 
as
WITH CTE AS
(  
   SELECT current_timestamp as SomeTimestamp
)
SELECT SomeTimestamp 
from CTE; -- ; only at the end

或者分两步：

CREATE TABLE TestCTEInsert (SomeTimestamp TIMESTAMP); -- end this with a ;

insert into TestCTEInsert
WITH CTE AS
(  
   SELECT current_timestamp as SomeTimestamp
)
SELECT SomeTimestamp 
from CTE; -- ; only at the end

上面运行在普通的 Postgres 安装上，我无权访问 RDS

Answer 3

将脚本更改为此

  CREATE TABLE TestCTE (SomeInt INTEGER)
  WITH CTE AS (SELECT 1 as SomeInt) 
  INSERT INTO TestCTE  SELECT SomeInt from CTE;

Answer 4

试试这个

 CREATE TABLE TestCTE (SomeInt INTEGER)
;WITH CTE AS
(SELECT 1 as SomeInt)
INSERT (SomeInt) INTO TestCTE
SELECT SomeInt FROM CTE;

Answer 5

当我在 redshift 数据库中执行 SQL 查询时，我在 sql 查询上遇到了相同的错误，我在 Insert into 中添加 with 子句，并运行一个过程，你们如何解决它，或者问题仍然存在。谁能帮帮我吗