MySQL 存储过程(Stored Procedure)是一组为了完成特定功能的 SQL 语句集合,存储在数据库中,可以通过调用执行。存储过程可以接受参数,返回结果集,还可以包含变量、条件语句、循环等控制结构。 相关优势 提高性能:存储过程在首次执行时会被编译并存储在数据库中,后续调用时无需再次编译,从而提高执行效率。 减少网络流
MySQL 存储过程(Stored Procedure)是一组预先编译好的 SQL 语句,存储在数据库中,可以通过调用执行。存储过程可以提高数据库的性能、安全性和可维护性。 相关优势 性能优势:存储过程在首次执行时会被编译并存储在数据库中,后续调用时无需再次编译,从而提高执行效率。 安全性:可以通过权限控制来限制对存储过程的访问,从...
For more information on MySQL stored procedures, please refer toUsing Stored Routines. Connector/J exposes stored procedure functionality through JDBC'sCallableStatementinterface. The following example shows a stored procedure that returns the value ofinOutParamincremented by 1, and the string passed in ...
Dim conn As New MySqlConnection Dim cmd As New MySqlCommand conn.ConnectionString = "server=127.0.0.1;" _ & "uid=root;" _ & "database=test" Try conn.Open() cmd.Connection = conn cmd.CommandText = "add_catagory" cmd.CommandType = CommandType.StoredProcedure cmd.Parameters....
Bug #73774 Can't execute a stored procedure if exists function with same name Submitted: 29 Aug 2014 17:54Modified: 11 Jan 2020 16:52 Reporter: Filipe Silva Email Updates: Status: Closed Impact on me: None Category: Connector / JSeverity: S2 (Serious) Version: OS: Any Assigned to:...
Execute command denied for stored procedure Hi! I'm trying to use MySQL stored procedures from my Flask app, but get this error both from MySQL console and the web application: ERROR 1370 (42000): execute command denied to user 'rhubarb'@'%' for routine 'verbs2.sp_getVerbsByPrefix' ...
Example: EXECUTE IMMEDIATE concat("select * from ", @table_name, " where a=", @val); The syntax is available as a standalone SQL (for testing purposes) and inside a stored procedure. Any SQL statement is supported in argument of EXECUTE IMMEDIATE. In particular, DROP PROCEDURE, ALTER ...
Bug #11638 Cannot prepare and execute a stored procedure with OUT parameter Submitted: 29 Jun 2005 12:45Modified: 3 Feb 2009 19:41 Reporter: Guy Harrison Email Updates: Status: Closed Impact on me: None Category: MySQL Server: C API (client library)Severity: S1 (Critical) Version: 5.0...
}publicstaticConnectiongetConnection() {Stringurl ="jdbc:mysql://localhost/sse?user=root&password=root";//"jdbc:oracle:thin:@127.0.0.1:1521:orcl";Stringusername ="root";//"jyl";Stringpwd ="manager";//"jyl7123421";Connectioncon = null;try{ ...
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957) Please note that when i login into mysql query browser( Database User Interface tool ), it show me only procedure's definition (shown below) and no other info is displayed. Might be this is the reason. ...