提高 假设您安装了 SQL Server 2017。 此改进引入了新的使用提示 "QUERY_OPTIMIZER_COMPATIBILITY_LEVEL_n" 在查询级别强制执行查询优化程序行为,如同使用数据库兼容级别n编译的查询,其中 n 是 受支持的数据库兼容性级别,从以下列表中:100、110、120、130或140。 注意: 如果通过数据库范围配置、trace 标志...
Compatibility supportSupport for use of the READUNCOMMITTED and NOLOCK hints in the FROM clause that apply to the target table of an UPDATE or DELETE statement will be removed in a future version of SQL Server. Avoid using these hints in this context in new development work, and plan to ...
In SQL Server 2016 (13.x) when using database compatibility level 130, sampling of data to build statistics is done in parallel to improve the performance of statistics collection. The query optimizer will use parallel sample statistics whenever a table size exceeds a certain threshold. Starting ...
SQL Server Engine PolyBase Linux 13643332 FIX: Scalar UDF Inlining issues in SQL Server 2019 (KB4538581) SQL Server Engine Programmability All 13647491 FIX: Table Variable Deferred Compilation feature on SQL Server 2019 database remains enabled when database compatibility level is 140 or lower (KB45...
In SQL Server 2016 (13.x) when using database compatibility level 130, sampling of data to build statistics is done in parallel to improve the performance of statistics collection. The query optimizer will use parallel sample statistics whenever a table size exceeds a certain threshold. Starting ...
验证与SQL Server的连接并验证源服务器要求的任务的数据库级输出 展开表 名称类型说明 compatibilityLevel DatabaseCompatLevel SQL Server数据库的兼容级别 databaseFiles DatabaseFileInfo[] 数据库文件的列表 databaseState DatabaseState 数据库的状态 id string 结果标识符 name string 数据库名称 resultType...
Note: Trace flag 9440 will turn off the functionality provided by this fix for databases with a compatibility level of 160 and earlier. SQL Server Engine Query Optimizer All 2690500 Fixes an issue in Cardinality Estimation (CE) feedback involving uninitialized variables in PStmtGetSafe....
Maintenance plans only run against databases set to compatibility level 80 or higher. Object Limit the Selection grid to display tables, views, or both. Selection Specify the tables or indexes affected by this task. Not available when Tables and Views is selected in the Object box. A...
Compatibility supportSupport for use of the READUNCOMMITTED and NOLOCK hints in the FROM clause that apply to the target table of an UPDATE or DELETE statement will be removed in a future version of SQL Server. Avoid using these hints in this context in new development work, and plan to ...
Compatibility Support SET ROWCOUNT will not affect DELETE, INSERT, and UPDATE statements in a future release of SQL Server. Do not use SET ROWCOUNT with DELETE, INSERT, and UPDATE statements in new development work, and plan to modify applications that currently use it. We recommend that you ...