Question

我在SQL合并上有一个OUTPUT子句，我已将其识别为导致此错误的原因：

列名或提供的值数与表定义不匹配

我正在输出一个包含单个字段的临时表，而且我为什么会收到此错误而感到沮丧。

CREATE TABLE #PermissionChanges(
    ChangeType NVARCHAR(10)
)

MERGE INTO [dbo].[PermissionClient] AS Target
        USING (VALUES (@permissionId, @clientId, 1))
            AS Source ([PermissionId], [ClientId], [Enabled])   
        ON (Target.[ClientId] = @clientId AND Target.[PermissionId] = Source.[PermissionId])
        WHEN MATCHED THEN 
            UPDATE SET [Enabled] = Source.[Enabled]
        WHEN NOT MATCHED THEN
            INSERT ([PermissionId], [ClientId], [Enabled])
            VALUES (@permissionId, @clientId , Source.[Enabled])
        OUTPUT
             $ACTION ChangeType 
             INTO #PermissionChanges;

如果我将OUTPUT更改为：

  OUTPUT $ACTION;

脚本成功执行，我得到：

$ACTION
-------
UPDATE

Answer 1

检查现有的表结构，如下代码：

USE tempdb
GO

-- Clean up
IF OBJECT_ID('tempdb.dbo.#PermissionChanges','u') is not null
BEGIN
DROP TABLE #results
END

CREATE TABLE #PermissionChanges(
    ChangeType NVARCHAR(10)
)
GO


-- Clean up
IF OBJECT_ID('tempdb.[dbo].[PermissionClient]','u') is not null
BEGIN
DROP TABLE #results
END

CREATE TABLE [dbo].[PermissionClient]
([PermissionId] int
, [ClientId] int
, [Enabled] int
)
GO

DECLARE @clientId int
SET @clientId=1
DECLARE @permissionId int
SET @permissionId=1


MERGE INTO [dbo].[PermissionClient] AS Target
        USING (VALUES (@permissionId, @clientId, 1))
            AS Source ([PermissionId], [ClientId], [Enabled])   
        ON (Target.[ClientId] = @clientId AND Target.[PermissionId] = Source.[PermissionId])
        WHEN MATCHED THEN 
            UPDATE SET [Enabled] = Source.[Enabled]
        WHEN NOT MATCHED THEN
            INSERT ([PermissionId], [ClientId], [Enabled])
            VALUES (@permissionId, @clientId , Source.[Enabled])
        OUTPUT
             $ACTION ChangeType 
             INTO #PermissionChanges;

SELECT * FROM #PermissionChanges

返回

ChangeType
INSERT

Answer 2

尝试从OUTPUT子句中删除ChangeType：

MERGE INTO [dbo].[PermissionClient] AS Target
    USING (VALUES (@permissionId, @clientId, 1))
        AS Source ([PermissionId], [ClientId], [Enabled])   
    ON (Target.[ClientId] = @clientId AND Target.[PermissionId] = Source.[PermissionId])
    WHEN MATCHED THEN 
        UPDATE SET [Enabled] = Source.[Enabled]
    WHEN NOT MATCHED THEN
        INSERT ([PermissionId], [ClientId], [Enabled])
        VALUES (@permissionId, @clientId , Source.[Enabled])
    OUTPUT
         $ACTION 
         INTO #PermissionChanges;

Answer 3

我遇到了同样的问题，发现指定了我想-- MySQL v8 show create table foo; >> CREATE TABLE `foo` ( `id` int NOT NULL AUTO_INCREMENT, `field_1` varchar(255) NOT NULL, `field_2` varchar(255) NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `foo_field_1_field_2` (`field_1`,`field_2`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci show create table foo2; >> CREATE TABLE `foo2` ( `id` int NOT NULL AUTO_INCREMENT, `field_1` varchar(255) NOT NULL, `field_2` varchar(255) NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `field_1` (`field_1`,`field_2`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci OUTPUT进入的列名解决了该问题，我在 some 中也看到了这一点。 MERGE documentation。

$Action

但是，我在没有显式列名的情况下再次尝试了，令我惊讶的是，查询成功了。

我的问题是，有一次我确实使用临时表运行查询，该临时表的列未在OUTPUT $ACTION ChangeType INTO #PermissionChanges(ChangeType)语句中表示，并且该错误一直存在，直到我明确删除临时表并仅用OUTPUT的一列。当允许查询无错误执行时，基本上就是脚本末尾的情况。

SQL Merge - 列名或提供的值数与表定义不匹配

3 个答案: