来自 CTE 的 Redshift INSERT INTO TABLE

Question

根据 Redshift WITH 子句 documentation，您可以将 WITH 子句与 INSERT INTO...SELECT 语句一起使用。但是，在对此进行测试时，出现以下错误。这是不可能的，还是我的语法有误？

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

ERROR: 42601: syntax error at or near "insert"

有趣的是，它确实支持插入到新的 table 即

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

The command completed successfully (1 rows affected)

编辑： 只是为了确认，我在使用 INTEGER 列而不是 TIMESTAMP 时遇到同样的错误：

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

ERROR: 42601: syntax error at or near "insert"

Answer 1

尝试将 CTE 放入插入物中（不确定是否达到目的）

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

Answer 2

将您的脚本更改为此

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

Answer 3

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 4

;终止了一个语句，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做到这一点，要么使用 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

以上运行在 vanilla Postgres 安装上，我无权访问 RDS

来自 CTE 的 Redshift INSERT INTO TABLE

Redshift INSERT INTO TABLE from CTE

sql

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