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.