c# - odp.net 可以将参数传递给 bool pl/sql 参数吗？

Question

是否可以将 OracleParameter 正确传递给 pl/sql 存储过程中的 bool 参数？

Answer 1

我使用了以下解决方法来绕过此限制:

1. 使用匿名 block 包装函数调用。
2. 返回包含 1 或 0 的输出变量。
3. 读取输出变量并将其转换为 bool 值。

下面是一些示例代码:

using (var connection = new OracleConnection("<connection string>"))
{
    var command = new OracleCommand();
    command.Connection = connection;
    command.CommandText = 
        "declare v_bool boolean;" + 
        "begin " +
        "v_bool := auth_com.is_valid_username (:username); "+
        "if (v_bool = TRUE) then select 1 into :v_result from dual; end if; " +
        "if (v_bool = FALSE) then select 0 into :v_result from dual; end if; " +
        "end;";

    command.Parameters.Add(new OracleParameter { ParameterName = "username", OracleDbType = OracleDbType.NVarchar2, Size=512, Direction = ParameterDirection.Input });
    command.Parameters.Add(new OracleParameter { ParameterName = "v_result", OracleDbType = OracleDbType.Decimal, Direction = ParameterDirection.Output });     

    try
    {
        connection.Open();
        command.ExecuteNonQuery();
    }
    finally
    {
        connection.Close();
    }

    bool success = Convert.ToBoolean(((OracleDecimal)command.Parameters["v_result"].Value).ToInt32());
}

编辑:

Alex Keh，来自 Oracle，2013 年 10 月:

We're planning on supporting ODP.NET Boolean in the managed provider in the near term, possibly in the middle of next year.