Question

我在MS SQL Server上进行了以下MERGE操作。

DECLARE @data as xml
DECLARE @id as int
DECLARE @version as rowversion
SET @data = ?
SET @id = ?
<# if ( tw.local.enableOptimisticLocking == true ) { #>
SET @version = CAST(? as rowversion)
<# } #>
MERGE [<#=tw.local.dbSchema#>].[<#=tw.local.tableName#>] AS target
USING (Select @id as id, @version version ) as source ON target.id = source.id
WHEN MATCHED <# if ( tw.local.enableOptimisticLocking == true ) { #> AND target.version = source.version <# } #> THEN
    UPDATE SET data = @data
WHEN NOT MATCHED THEN
    INSERT (data) VALUES (@data)
OUTPUT $action as _action<# if ( tw.local.enableOptimisticLocking == true ) { #>, CAST( inserted.version as BigInt) as [version]<# } #>, inserted.id;

我希望对另一个数据库和表有一个INSERT / UPDATE语句，以根据上述MERGE的结果更新某些列。

我不确定我是否可以在MERGE中拥有其他INSERT / UPDATE，或者我是否需要使用Output从MERGE获取我想要INSERT / UPDATE的所有数据？

我尝试了以下但是它不起作用....

DECLARE @data as xml
DECLARE @id as int
DECLARE @version as rowversion
SET @data = ?
SET @id = ?
<# if ( tw.local.enableOptimisticLocking == true ) { #>
SET @version = CAST(? as rowversion)
<# } #>
MERGE [<#=tw.local.dbSchema#>].[<#=tw.local.tableName#>] AS target
USING (Select @id as id, @version version ) as source ON target.id = source.id
WHEN MATCHED <# if ( tw.local.enableOptimisticLocking == true ) { #> AND target.version = source.version <# } #> THEN
    UPDATE SET data = @data
WHEN NOT MATCHED THEN
    INSERT (data) VALUES (@data)
OUTPUT $action as _action<# if ( tw.local.enableOptimisticLocking == true ) { #>, CAST( inserted.version as BigInt) as [version]<# } #>, inserted.id, inserted.version, inserted.data;

IF EXISTS (SELECT INSERTED.* FROM INSERTED LEFT JOIN DELETED ON INSERTED.ID = DELETED.id WHERE DELETED.ID IS NULL)
    BEGIN
        INSERT INTO [EMEAworkflowBPM].[cmf].[BusinessContextReporting] (id, version, data, updatedOn, toProcess)
        SELECT i.id, i.version, i.data, GETDATE(), 1
        FROM Inserted i
        LEFT JOIN [EMEAworkflowBPM].[cmf].[BusinessContextReporting] bcr
        ON i.id = bcr.id AND i.version = bcr.version
        WHERE bcr.id IS NULL;
    END
ELSE IF EXISTS (SELECT INSERTED.* FROM INSERTED INNER JOIN DELETED ON INSERTED.ID = DELETED.ID)
    BEGIN
        UPDATE [EMEAworkflowBPM].[cmf].[BusinessContextReporting]
        SET version = i.version, data = i.data, updatedOn = GETDATE(), toProcess = 1
            FROM Inserted AS i
            LEFT JOIN [EMEAworkflowBPM].[cmf].[BusinessContextReporting] AS bcr
            ON i.id = bcr.id;
    END

非常感谢您的时间和帮助。

Answer 1

您必须将OUTPUT与INTO子句合并，并将UPDATE和INSERT作为MERGE之后的新语句。

看看这个问题中接受的答案：

Using merge..output to get mapping between source.id and target.id

合并后插入或更新

1 个答案: