validation-query: select 1 from dual是一条数据库验证查询,用于检查数据库连接是否仍然有效。当执行这条查询时,数据库会尝试执行一个简单的查询,如果查询成功执行并返回预期结果,则说明数据库连接是有效的。 2. 这条查询通常在哪个数据库系统中使用 这条查询通常在Oracle数据库系统中使用。dual表是Oracle数据库中的...
Now, I have no idea why the database (Oracle 10g) was so thoroughlywedged; I have yet to investigate that side of it. I had a look aroundthe DBCP code, though, and found two things: 1) there is no facility fora validation time-out, and; 2) the validation query is executed /withi...
Oracle 10g RAC (2 nodes). Our dbcp config is attached below. We are seeing undesired behaviour when we test db failover. Since we use load balancing connections in the pool point to both db servers. When we shutdown one of the db nodes our ping query hangs waiting for TCP/IP traffic....
http://oracle.com/services?username=user&password=dXNlcg0K&dept=eng You can extract the encoded value of the password= attribute value by specifying the string that occurs directly before the substring you want to extract, together with the string that occurs directly after the substring. Enter...
@Generated(value="OracleSDKGenerator", comments="API Version: 20190501") public final class QueryParameterValidationRequestPolicy extends com.oracle.bmc.http.client.internal.ExplicitlySetBmcModel Validate the URL query parameters on the incoming API requests on a specific route. Note: Objects sho...
Oracle iProcurement - Version 11.5.10 to 12.2 [Release 11.5 to 12.2]: Charge Account Is Invalid At FND_FLEX_SERVER Validation When Using Expense Account Rules (Inclu
This finite sample inequality provides us also with asymptotic equivalence of the selector with the oracle selector under general conditions. We also study the performance of this method in the case that the parameter of interest itself is pathwise differentiable (and thus, in principle, root-n ...
Now, I have no idea why the database (Oracle 10g) was so thoroughly wedged; I have yet to investigate that side of it. I had a look around the DBCP code, though, and found two things: 1) there is no facility for a validation time-out, and; 2) the validation query is executed ...