我正在使用System.Data.SQLite并遇到有关多个事务的问题。基本上,我的代码如下,但是失败了:
using (IDbConnection connection1 = new SQLiteConnection("connectionstring"), connection2 = new SQLiteConnection("connectionstring"))
{
connection1.Open();
connection2.Open();
IDbTransaction transaction1 = connection1.BeginTransaction();
IDbTransaction transaction2 = connection2.BeginTransaction(); // Fails!
using(IDbCommand command = new SQLiteCommand())
{
command.Text = "CREATE TABLE artist(artistid int, artistname text);";
command.CommandType = CommandType.Text;
command.Connection = connection1;
command.ExecuteNonQuery();
}
using (IDbCommand command = new SQLiteCommand())
{
command.Text = "CREATE TABLE track(trackid int, trackname text);";
command.CommandType = CommandType.Text;
command.Connection = connection2;
command.ExecuteNonQuery();
}
transaction1.Commit();
transaction2.Commit();
}
根据我的阅读,似乎System.Data.SQLite应该支持嵌套事务并且顺序事务。但是代码在第7行失败(第二个事务声明的位置),抛出以下异常:
System.Data.SQLite.SQLiteException: The database file is locked
System.Data.SQLite.SQLite3.Step(SQLiteStatement stmt)
System.Data.SQLite.SQLiteDataReader.NextResult()
System.Data.SQLite.SQLiteDataReader..ctor(SQLiteCommand cmd, CommandBehavior behave)
System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior)
System.Data.SQLite.SQLiteCommand.ExecuteNonQuery()
System.Data.SQLite.SQLiteTransaction..ctor(SQLiteConnection connection, Boolean deferredLock)
System.Data.SQLite.SQLiteConnection.BeginDbTransaction(IsolationLevel isolationLevel)
System.Data.Common.DbConnection.System.Data.IDbConnection.BeginTransaction()
有人知道这个问题是什么或如何解决吗?我认为对于任何数据库系统来说,拥有并发事务是至关重要的,所以一定有某种方法可以做到。
谢谢!
command1
,但是您引用了command
。 - JonH