命中索引且含 in expr 时,在特定的场景下会导致查询返回的结果集不对。出现该 BUG 需满足 WHERE 条件中含 4 个及以上索引列,且: 第一个列是等值谓词。 第二个列是范围谓词。 第三个列是 in 表达式。 第四个列是任意谓词。 其中,第 1 个条件可是 1 或多个等值谓词,第 2 个条件后也可跟着 0 或多个等值谓词。 例如,
Select theOracle databaseoption in the connector selection. Specify the Oracle net service name/TNS alias or Easy Connect (Plus) connection string to connect to inServer. Easy Connect is the simplest to use by setting theServervalue to your Oracle Database serverHostname/ServiceName, whereService...
Oracle Database PostgreSQL SAP ERP SharePoint SQL Server Teradata 桌面流程 使用Microsoft Entra ID 的 HTTP 故障排除 當您嘗試使用內部部署數據源發佈數據流時,可能會遇到下列 MashupException 錯誤: M 複製 AzureDataLakeStorage failed to get the response: 'The underlying connection was closed: An unexpecte...
Oracle Database includes a powerful array of query optimization features that maximize performance and allow DBAs to become more productive by providing innovation in plan stability.
valemployees_table = spark.read .format("jdbc") .option("url","<jdbc-url>") .option("dbtable","<table-name>") .option("user","<username>") .option("password","<password>") .load() Spark automatically reads the schema from the database table and maps its types back to Spark SQL...
Assume that you have Microsoft SQL Server Analysis Services (SSAS) installed on an instance of SQL Server 2016. If you use the ODBC .NET Provider to connect to and query an Oracle database, SSAS 2016 may incorrectly generate a filt...
这里仅是简述下Oracle DBIM(db in memory),详细介绍见Oracle Database In-Memory with Oracle Database 19c 、Oracle Database In-Memory: A dual format in-memory database。 Oracle 12c内存数据库(DBIM)是一个支持行列存的双格式数据库,table的数据在磁盘上仍然采用行存格式,在内存中支持行存和列存格式。
Connect to an SAP HANA database from Power Query Desktop To connect to an SAP HANA database from Power Query Desktop: SelectGet Data > SAP HANA databasein Power BI Desktop orFrom Database > From SAP HANA Databasein theDataribbon in Excel. ...
In-memory area的内存是有限的,因此并不是table的所有行/列都被放入其中,会有一定的比例和相应的淘汰机制,Oracle后续也增加了auto-pilot的能力来预测列数据的加载和淘汰。 为了保证事务语义,增量的DML会通过delete mark + transactional log来记录,在log达到一定阈值时则重建必要的IMCU,查询时要考虑base部分的delete ...
InNavigator, select the data you require, then selectTransform datato transform the data in Power Query editor. Connect using advanced options Power Query provides a set of advanced options that you can add to your query if needed. The following table lists all of the advanced options you can...