回报价值
对于UPDATE,INSERT和DELETE语句,返回值是受命令影响的行数.对于CREATE TABLE和DROP TABLE语句,返回值为0.对于所有其他类型的语句,返回值为-1.
对于UPDATE,INSERT和DELETE语句,返回值是受命令影响的行数.对于CREATE TABLE和DROP TABLE语句,返回值为0.对于所有其他类型的语句,返回值为-1.
这就是microsofts docs关于该函数返回值的陈述……这是否意味着如果我调用存储过程,它会返回-1?
为了清楚起见,我应该从成功执行存储过程中获得什么返回值,或者存储过程由于某种原因未能执行…
解决方法
对于存储过程,它返回-1,而不管sp执行的操作(非常容易测试)
create procedure test1 as begin null ; --do nothing end test1 ; / create table testtable(a number); / create procedure test2 as begin insert into testtable(a) select level from dual connect by level < 5; end test2 ; / create procedure test3 as begin update testtable set a = a-1; end test3; / create procedure test4 as begin delete testtable; end test4; /
static int executeProc(string procName,OracleConnection connection ){ OracleCommand cmd= new OracleCommand(procName,connection); cmd.CommandType = CommandType.StoredProcedure; return cmd.ExecuteNonQuery(); } static void Main(string[] args) { Console.WriteLine("what does ExecuteNonQuery return?"); // Connect string connectStr = getConnection(); OracleConnection connection = new OracleConnection(connectStr); connection.open(); try{ Console.WriteLine("test1 =>" + executeProc("test1",connection)); Console.WriteLine("test2 =>" + executeProc("test2",connection)); Console.WriteLine("test3 =>" + executeProc("test3",connection)); Console.WriteLine("test4 =>" + executeProc("test4",connection)); } catch (Exception e){ Console.WriteLine(e.Message); } Console.WriteLine("Done"); }
what does ExecuteNonQuery return? test1 =>-1 test2 =>-1 test3 =>-1 test4 =>-1
/* drop table testtable; drop procedure test1; drop procedure test2; drop procedure test3; drop procedure test4; */
参考:
http://download.oracle.com/docs/cd/E11882_01/win.112/e18754/OracleCommandClass.htm#i998363
http://forums.oracle.com/forums/thread.jspa?threadID=636182