Loadrunner 如何访问数据库

在Loadrunner中也提供了C对数据库操作的相关功能函数，以下这些数据库功能函数只能用于Web Services协议。

lr_db_connect	连接数据库
lr_db_disconnect	断开数据库的连接
lr_db_executeSQLStatement	执行SQL语句
lr_db_dataset_action	对数据库执行操作
lr_db_getValue	从数据集中检索值

各函数语法如下：

lr_db_connect("StepName", "ConnectionString=<connection_string>", "ConnectionName=<connection_name>", "ConnectionType=<connection_type>", LAST);

lr_db_disconnect("StepName=<step_name>", "ConnectionName=<connection_name>", LAST);

lr_db_executeSQLStatement("StepName=<step_name>", "ConnectionName=<connection_name>", "SQLStatement=<statement>", ["DatasetName=<dataset_name>",] LAST);

lr_db_dataset_action("StepName=<step_name>", "DatasetName=<dataset_name>", "Action=<action>", LAST);

lr_db_getValue("StepName=<step_name>", "DatasetName=<dataset_name>", "Column=<column>", "Row=<row>", "OutParam=<output_parm>", LAST);

下面以oracle数据库为例：

Action()
{
    int NumRows=0; 
    int i=1; 

    //建立数据库连接
    lr_db_connect("StepName=DatabaseConnection", 
                  "ConnectionString=Provider=OraOLEDB.Oracle.1;Password = test ;Persist Security Info=True; User ID  = test ; Data Source = betadb ; Server = 172.19.188.191", 
                  "ConnectionName=InvDatabaseConnection", 
                  "ConnectionType=OLEDB", 
                  LAST); 

     //执行SQL语句
     NumRows = lr_db_executeSQLStatement("StepName=PerformQuery", 
                                          "ConnectionName=InvDatabaseConnection", 
                                          "SQLStatement=SELECT cons_no,cons_id FROM c_cons where rownum<10", 
                                          "DatasetName=MyDataset", 
                                          LAST); 
      lr_output_message("The query returned %d rows.", NumRows); 

      //打印出结果
      lr_db_dataset_action("StepName=PrintDataset", 
                            "DatasetName=MyDataset",
                            "Action=PRINT", 
                           LAST);


      //利用循环检索数据值
      while (i<10) { 
          lr_db_getvalue("StepName=GetValue", 
                         "DatasetName=MyDataset", 
                         "Column=CONS_NO",
                         "Row=next",
                         "OutParam=MyOutputParam",
                         LAST); 
          lr_output_message("The value is: %s", lr_eval_string("{MyOutputParam}") ); 
          i=i+1; }


          //释放结果
            lr_db_dataset_action("StepName=RemoveDataset", 
                            "DatasetName=MyDataset",
                            "Action=REMOVE", 
                            LAST);


     //断开数据库连接
      lr_db_disconnect("StepName=Disconnect",
                       "ConnectionName=InvDatabaseConnection",
                       LAST); 

    return 0;
}

运行后，输出信息如下：

Virtual User Script started
Starting action vuser_init.
Ending action vuser_init.
Running Vuser...
Starting iteration 1.
Starting action Action.
Action.c(6): DB Connection "DatabaseConnection" started ... Wait ....
Action.c(6): DB connection was successful
Action.c(13): SQL Statement  execution "PerformQuery" started
Action.c(13): SQL Statement  execution was successful
Action.c(13): ================================================
Action.c(18): The query returned 9 rows.
Action.c(20): Dataset action "PrintDataset" started
Action.c(20):
Action.c(20): ******** Start printing ***********
Action.c(20): Number of records in dataset  = 9
Action.c(20): Num.   CONS_NO                  CONS_ID                 
Action.c(20): =========================================================
Action.c(20): 1      3096451321               310306247               
Action.c(20): 2      3097730300               3376536                 
Action.c(20): 3      0000265443               3376537                 
Action.c(20): 4      0000265456               3376538                 
Action.c(20): 5      0000265469               3376539                 
Action.c(20): 6      0000265472               3376540                 
Action.c(20): 7      3098976354               314348099               
Action.c(20): 8      0000265498               3376542                 
Action.c(20): 9      0000265502               3376543                 
Action.c(20): ********End printing ***********
Action.c(20):
Action.c(20): Dataset action was successful
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 3096451321
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 3097730300
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 0000265443
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 0000265456
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 0000265469
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 0000265472
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 3098976354
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 0000265498
Action.c(27): Get db value "GetValue" started
Action.c(27): Get db value was successful
Action.c(27): ================================================
Action.c(33): The value is: 0000265502
Action.c(36): Dataset action "RemoveDataset" started
Action.c(36): Dataset action was successful
Action.c(41): DB disconnect "Disconnect" started
Action.c(41): DB disconnect was successful
Action.c(41): ================================================
Ending action Action.
Ending iteration 1.
Ending Vuser...
Starting action vuser_end.
Ending action vuser_end.
Vuser Terminated.