KB2499023-修复：当复杂更新查询在 SQL Server 2008 或 SQL Server 2008 R2 中的执行计划中使用联接运算符时，结果不正确

症状

当你在 Microsoft SQL Server 2008 或 Microsoft SQL Server 2008 R2 的执行计划中运行使用 联接 运算符的复杂更新查询时，可能会收到不正确的结果。 注意 更新查询可能包含子查询、聚合函数和 DISTINCT 子句。如果在 Microsoft SQL Server 2008 或 Microsoft SQL Server 2008 R2 并行数据仓库中运行同一查询，则可能会收到另一组错误结果。 例如，运行以下代码时可能会收到不正确的结果：

UPDATE RB SET rb1 = (SELECT AVG(DISTINCT T2_1.C1) AS C1 FROM (SELECT DISTINCT T3_1.C3 AS C1, T3_1.C5 AS C2 FROM (SELECT T5_1.c2 AS C1, T5_1.c2 AS C2, T5_1.c3 AS C3, T5_1.c3 AS C4, T5_1.c2 AS C5 FROM DC AS T5_1 UNION SELECT T5_1.c2 AS C1, T5_1.c3 AS C2, T5_1.c2 AS C3, T5_1.c2 AS C4, T5_1.c3 AS C5 FROM DC AS T5_1) AS T3_1) AS T2_1 WHERE (T2_1.C1 = rb3)), rb2 = (SELECT COUNT_BIG(DISTINCT T2_1.C1) AS C1 FROM (SELECT DISTINCT T3_1.C1 AS C1 FROM (SELECT T5_1.rc2 AS C1 FROM RC AS T5_1 UNION ALL SELECT T5_1.c3 AS C1 FROM DC AS T5_1) AS T3_1) AS T2_1 WHERE (T2_1.C1 > rb1)), rb3 = (SELECT COUNT_BIG(*) AS C1 FROM (SELECT DISTINCT T3_1.C1 AS C1, T3_1.C2 AS C2, T3_1.C3 AS C3, T3_1.C4 AS C4, T3_1.C5 AS C5, T3_1.C6 AS C6, T3_1.C7 AS C7, T3_1.C8 AS C8, T3_1.C9 AS C9, T3_1.C10 AS C10 FROM (SELECT T5_1.b2 AS C1, T5_1.b1 AS C2, T5_1.b3 AS C3, T5_1.b2 AS C4, T5_1.b2 AS C5, T5_1.b2 AS C6, T5_1.b2 AS C7, T5_1.b1 AS C8, T5_1.b2 AS C9, T5_1.b3 AS C10 FROM DB AS T5_1 UNION SELECT T5_1.ra3 AS C1, T5_1.ra3 AS C2, T5_1.ra3 AS C3, T5_1.ra3 AS C4, T5_1.ra2 AS C5, T5_1.ra3 AS C6, T5_1.ra1 AS C7, T5_1.ra1 AS C8, T5_1.ra1 AS C9, T5_1.ra1 AS C10 FROM RA AS T5_1) AS T3_1) AS T2_1 WHERE (T2_1.C2 <= rb3)) WHERE rb1 IN (SELECT T2_1.C1 AS C1 FROM (SELECT T4_1.a2 AS C1, T4_1.a1 AS C2, T4_1.a1 AS C3, T4_1.a2 AS C4, T4_1.a1 AS C5, T4_1.a2 AS C6, T4_1.a3 AS C7, T4_1.a1 AS C8 FROM DA AS T4_1 WHERE (T4_1.a1 > (SELECT MIN(DISTINCT T5_1.b3) AS C1 FROM DB AS T5_1 WHERE (T5_1.b3 <= T4_1.a1))) UNION ALL SELECT T4_1.a2 AS C1, T4_1.a2 AS C2, T4_1.a1 AS C3, T4_1.a1 AS C4, T4_1.a1 AS C5, T4_1.a1 AS C6, T4_1.a1 AS C7, T4_1.a3 AS C8 FROM DA AS T4_1) AS T2_1);

原因

出现此问题的原因是 SQL Server 查询优化程序出错。

解决方案

状态

Microsoft 已确认这是在“适用范围”部分中列出的 Microsoft 产品存在的问题。

参考

有关并行数据仓库的详细信息，请访问以下 Microsoft 网站：

有关并行数据仓库的常规信息有关 SQL Server 的增量服务模型的详细信息，请单击下面的文章编号，以查看 Microsoft 知识库中相应的文章：

935897 从 SQL Server 团队提供的增量服务模型可提供报告问题的修补程序有关 SQL Server 更新的命名架构的详细信息，请单击下面的文章编号，以查看 Microsoft 知识库中相应的文章：

822499 Microsoft SQL Server 软件更新程序包的新命名架构有关软件更新术语的详细信息，请单击下面的文章编号，以查看 Microsoft 知识库中相应的文章：

824684 用于描述 Microsoft 软件更新的标准术语的说明