使用ODP.NET 批量插入时，将cmd.ArrayBindCount 设置为10万时出错，经搜索得知，原来 使用array DML operations一次最多插入65535条=2^16。但是据我实验一次最多插入65534条。
本人使用的是Oracle 10.1.0.2。不知道之后的版本修复了没有！
以下是插入6万条记录，各种方法花费的时间。
ordinaryInsert
1 static void ordinaryInsert(int[] ids, string[] names)
2 {
3 using (OracleConnection connection = new OracleConnection(connectString))
4 {
5 connection.Open();
6 using (OracleCommand cmd = connection.CreateCommand())
7 {
8 string sqlInsert = "insert into person values(:pId,:name)";
9 cmd.CommandText = sqlInsert;
10 OracleParameter paraId =
11 cmd.Parameters.Add("pId", OracleDbType.Int32);
12 paraId.Direction = ParameterDirection.Input;
13 OracleParameter paraName =
14 cmd.Parameters.Add("name", OracleDbType.NVarchar2, 50);
15 paraName.Direction = ParameterDirection.Input;
16
17 Stopwatch watch = new Stopwatch();
18 watch.Start();
19
20 for (int i = 0; i < ids.Length; i++)
21 {
22 paraId.Value = ids[i];
23 paraName.Value = names[i];
24
25 cmd.ExecuteNonQuery();
26 }
27
28 watch.Stop();
29 Console.WriteLine("ellapsed time {0} ms", watch.ElapsedMilliseconds);
30 }
31 }
32 }
ellapsed time 67309 ms
batchInsert
1 static void batchInsert(int[] ids, string[] names)
2 {
3 using (OracleConnection connection = new OracleConnection(connectString))
4 {
5 connection.Open();
6 using (OracleCommand cmd = connection.CreateCommand())
7 {
8 string sqlInsert = "insert into person values(:pId,:name)";
9 cmd.CommandText = sqlInsert;
10 cmd.ArrayBindCount = ids.Length;
11 OracleParameter paraId =
12 cmd.Parameters.Add("pId", OracleDbType.Int32);
13 paraId.Direction = ParameterDirection.Input;
14 OracleParameter paraName =
15 cmd.Parameters.Add("name", OracleDbType.NVarchar2, 50);
16 paraName.Direction = ParameterDirection.Input;
17 paraId.Value = ids;
18 paraName.Value = names;
19
20 Stopwatch watch = new Stopwatch();
21 watch.Start();
22 cmd.ExecuteNonQuery();
23 watch.Stop();
24 Console.WriteLine("ellapsed time {0} ms", watch.ElapsedMilliseconds);
25 }
26 }
27 }
ellapsed time 923 ms
batchInsertViaProcedure
1 static void batchInsertViaProcedure(int[] ids, string[] names)
2 {
3 using (OracleConnection connection = new OracleConnection(connectString))
4 {
5 connection.Open();
6 using (OracleCommand cmd = connection.CreateCommand())
7 {
8 cmd.CommandText = "insertPerson";
9 cmd.CommandType = CommandType.StoredProcedure;
10 cmd.ArrayBindCount = ids.Length;
11 OracleParameter paraId =
12 cmd.Parameters.Add("p_pId", OracleDbType.Int32);
13 paraId.Direction = ParameterDirection.Input;
14 OracleParameter paraName =
15 cmd.Parameters.Add("p_name", OracleDbType.NVarchar2, 50);
16 paraName.Direction = ParameterDirection.Input;
17
18 paraId.Value = ids;
19 paraName.Value = names;
20
21 Stopwatch watch = new Stopwatch();
22 watch.Start();
23 cmd.ExecuteNonQuery();
24 watch.Stop();
25 Console.WriteLine("ellapsed time {0} ms", watch.ElapsedMilliseconds);
26 }
27 }
28 }
ellapsed time 5116 ms
batchInsert和batchInsertViaProcedure花费时间少于ordinaryInsert是毋庸置疑的，但是batchInsertViaProcedure却比batchInsert花费更长的时间有点不能理解。难道预编译存储在数据库中的存储过程比在程序库缓冲区Oracle SQL sharing中的语句执行的更慢？难道Oracle中没有缓存procedure的可执行代码，导致每次调用都要加载，还是函数调用开销？不知道，留着疑问慢慢摸索O(∩_∩)O~
最后谢谢http://www.cnblogs.com/isline/archive/2010/08/31/1813722.html，文章不错！