It can make a significant difference in terms of execution plan, performance and resource consumption if a SQL statement is executed with explicitliteralsor with bind variables. Therefore it is recommended that you analyze an expensive SQL statement that uses bind variables in the same way, i.e....
大家好!我有一个程序需要从oracle数据库中移到hana中,发现原来的程序是一段select查询,在查询中条件和字段上都调用了自定义函数func1,这个func1里面有较复杂的if判断,然后查询了多个表返回结果到外层select。 问题是:HANA的Scalar函数(UDF) 不支持SQL Statement(不允许查询表),就无法完成原来sql的转换。考虑过把func...
1.5SQL 保留字 保留字对于 SAP HANA 数据库的 SQL 解析器有着特殊含义,不能成为用户自定义的名字。保留字不能在 SQL 语句中使用为集合对象名。如果有必要,你可以使用双引号限定表或列名绕过这个限制。 下表列出了所有现在和未来 SAP HANA 数据库的保留字: 2 数据类型 2.1日期时间类型 2.1.1 DATE(日期) DATE...
The HANA colleague in the incident told me the reason of this difference. I copied the reply to this mail for you ( in blue ): “It's the performance gap between prepared statement and non-prepared statement, when LIMIT is invovled. You may know that sql optimizer in HANA is rule-based...
";client.connect(function(err){if(err){res.send({"error":err.message});}client.prepare(sql,function(err,statement){if(err){res.send({"error":err.message});}statement.exec([req.params.emp_id],function(err,rows){if(err){res.send({"error":err.message});}client.end();res.send({...
->Before executing Disk Fragmentation we can see unused size of data file using the SQL statement (Hana_Disks_Overview), yoo can have latest SQL statements from the note 1969700 - SQL Statement Collection for SAP HANA Syntax: All this ALTER does is "Frees unused space inside an SAP HANA da...
AUTO_CORR Function (Aggregate) AVG Function (Aggregate) CORR Function (Aggregate) CORR_SPEARMAN Function (Aggregate) COUNT Function (Aggregate) CROSS_CORR Function (Aggregate) DFT Function (Aggregate) FIRST_VALUE Function (Aggregate) LAST_VALUE Function (Aggregate) ...
以上代码首先加载HANA JDBC驱动程序,并通过DriverManager.getConnection()方法建立与HANA数据库的连接。然后,创建Statement对象来执行SQL查询语句,并使用ResultSet对象处理查询结果。最后,通过close()方法关闭数据库连接,释放资源。 类图 下面是使用Mermaid语法表示的类图,展示了上述Java代码中的类结构。
请参阅 SAP Note #1969700 - SQL statement collection for SAP HANA(SAP 说明 #1969700 - SAP HANA 的 SQL 语句集合),并下载该说明随附的 SQL Statements.zip 文件。 将此 .zip 文件存储在本地硬盘上。 在SAP HANA Studio 中的“System Information”(系统信息)选项卡上,右键单击“Name”(名称)并选择“...
Also to monitor the expensive sqls executed in HANA. Identify the ways for performance optimization. Find expensive statements for errors SELECT "HOST", "PORT", "CONNECTION_ID", "TRANSACTION_ID", "STATEMENT_ID", "DB_USER", "APP_USER", "START_TIME", "DURATION_MICROSEC", "OBJECT_NAME",...