QSqlDatabase::removeDatabase(m_connectionName); 泄漏的问题有所改善,但点快了仍然有问题,研究了自己的代码才发现,原来自己每次 query时都open一下,即使每次查完后都关闭也来不及的。 将open 和 close函数放在构造和析构中执行;问题解决; openSQL voidWorker::openDatabase() { QDateTime dateTime=QDateTime...
The system variable can be set with session scope to support individual functions, or global scope to be a default for all new sessions. When global scope is used, the slow query log contains the old versions of the names. 当升级到 8.0.26 完成后,数据库开启正常监控采集,频繁的触发了 MySQL...
AI代码解释 timer=# alterdefaultprivilegesinschematrygrant all on tables tonew;ALTERDEFAULTPRIVILEGEStimer=# grant all privileges on database timer tonew;GRANTtimer=# grant all privileges on all tablesinschematrytonew; 我们对原表进行了如上的操作,然后在通过下面的NEW 账号持续对表进行alter table 的...
1. Determine what version of SQL Server you have and double-click the link below to download the zip file of SQL templates. In the zip file, click on the TRACETMPL folder and double-click on the .tdf file for your version and SQL Profiler will auto...
We frequently see SQL Server instances that use the default memory settings, or settings that do not optimize performance. The default settings are 0 MB for min server memory and 2,147,483,647 MB for max server memory, or more than 2 million GB (keep in mind, memory settings are designat...
This article discusses the instructions for Federal Information Processing Standard Publication 140-2 (FIPS 140-2) and how to use Microsoft SQL Server 2014 in the FIPS 140-2-compliant mode. Original product version: SQL Server 2014 Original KB number: 3141890 Note The terms "FIP...
频繁爆出这样的错误:java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 查阅了许多资料后,我怀疑报错可能与字段名不小心用了关键字有关。我检查了很多遍,但都没找到...
continue working until they can be updated to use the new names. The system variable can be set with session scope to support individual functions, or global scope to be a default for all new sessions. When global scope is used, the slow query log contains the old versions of the names....
This article introduces the FIPS 140-2 instructions and how to use SQL Server2016 in FIPS 140-2-compliant mode. Original product version: SQL Server 2016 and later Original KB number: 4014354 Lưu ý The terms "FIPS 140-2 compliant," "FIPS 140-2 compliance," and "FIPS 140-2-...
How to use SQL to query time series data,Tablestore:After you create a time series table in Tablestore and a mapping table for the time series table in SQL, you can execute SQL statements in the Tablestore console or by using a Tablestore SDK to query ..