异构查询需要 ANSI_NULLS

Question

我写了一个触发器。

USE [TEST]
GO
/****** Object:  Trigger [dbo].[TR_POSTGRESQL_UPDATE_YC]    Script Date: 05/26/2010 08:54:03 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER TRIGGER [dbo].[TR_POSTGRESQL_UPDATE_YC] ON [dbo].[BCT_CNTR_EVENTS]

FOR INSERT
AS 
BEGIN


DECLARE @MOVE_TIME varchar(14);
DECLARE @MOVE_TIME_FORMATED varchar(20);
DECLARE @RELEASE_NOTE varchar(32);
DECLARE @CMR_NUMBER varchar(15);
DECLARE @MOVE_TYPE varchar(2);

SELECT @MOVE_TIME = inserted.move_time
      ,@MOVE_TYPE = inserted.move_type
      ,@RELEASE_NOTE = inserted.release_note
      ,@CMR_NUMBER = inserted.cmr_number FROM inserted


IF(@MOVE_TYPE = 'YC')
    BEGIN

    SET @MOVE_TIME_FORMATED = SUBSTRING(@MOVE_TIME,1,4) + '-' + SUBSTRING(@MOVE_TIME,5,2) + '-' + SUBSTRING(@MOVE_TIME,7,2) + ' 00:00:00'

    --UPDATE OpenQuery(POSTGRESQL_SERV,'SELECT visit_cmr,visit_timestamp,visit_pin FROM VISIT') 
    --     SET visit_cmr = @RELEASE_NOTE 
    --     WHERE visit_timestamp = @MOVE_TIME_FORMATED
    --     AND   visit_pin = right(@CMR_NUMBER,5)
    --     AND   visit_cmr IS NULL

    END

    SET NOCOUNT ON;
END 

当我尝试插入行时收到错误。

异构查询需要 ANSI_NULLS 和 ANSI_WARNINGS 选项 为连接进行设置。这确保了一致的查询语义。 启用这些选项，然后重新发出您的查询。

之后我尝试使用SET SET ANSI_WARNINGS is ON，但它不起作用。 （链接服务器 PostgreSql 的触发器）

Answer 1

尝试使用这个

GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER TRIGGER [dbo].[TR_POSTGRESQL_UPDATE_YC] ON [dbo].[BCT_CNTR_EVENTS]

AFTER INSERT
AS 
BEGIN


DECLARE @MOVE_TIME varchar(14);
DECLARE @MOVE_TIME_FORMATED varchar(20);
DECLARE @RELEASE_NOTE varchar(32);
DECLARE @CMR_NUMBER varchar(15);
DECLARE @MOVE_TYPE varchar(2);

SELECT @MOVE_TIME = inserted.move_time
      ,@MOVE_TYPE = inserted.move_type
      ,@RELEASE_NOTE = inserted.release_note
      ,@CMR_NUMBER = inserted.cmr_number FROM inserted


IF(@MOVE_TYPE = 'YT')
    BEGIN

    SET @MOVE_TIME_FORMATED = SUBSTRING(@MOVE_TIME,1,4) + '-' + SUBSTRING(@MOVE_TIME,5,2) + '-' + SUBSTRING(@MOVE_TIME,7,2) + ' 00:00:00'

    SET ANSI_NULLS ON
    SET ANSI_WARNINGS ON

    UPDATE OpenQuery(POSTGRESQL_SERV,'SELECT visit_cmr,visit_timestamp,visit_pin FROM VISIT') 
           SET visit_cmr = @RELEASE_NOTE 
           WHERE visit_timestamp = @MOVE_TIME_FORMATED
           AND   visit_pin = right(@CMR_NUMBER,5)
           AND   visit_cmr IS NULL

    END

    SET NOCOUNT ON;
END 

Answer 2

当我将 ANSI_NULLS 和 QUOTED_IDENTIFIER 添加到查询（存储过程）顶部并将它们设置为 ON 时，问题得到解决。

请看这个例子：

USE [YOUR_DB]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[STORE_PROC_NAME]
AS
BEGIN
    SELECT * 
    FROM Linked_Server.dbo.YOUR_TABLE
END