的OracleCommand查詢空參數中凡 - ORA-01008：結合並非所有變量

Question

我有以下的方法和兩個PARAMATERS都爲空

布爾hasValue的=的HasValue（NULL，NULL）;

internal bool HasValue(int? param1, int? param2) 
    { 
     int count = 0; 
     using (var conn = new OracleConnection(connectionString)) 
     { 
       using (var command = conn.CreateCommand()) 
       { 
        command.CommandText = "select count(id) from Table1 " 
        + "where ((Column1 = :PARAM1 and :PARAM1 Is Not Null) Or (Column1 Is Null and :PARAM1 Is Null)) " 
        + "AND ((Column2 = :PARAM2 and :PARAM2 Is Not Null) Or (Column2 Is Null and :PARAM2 Is Null))"; 
        command.Parameters.Add("PARAM1", OracleDbType.Int16, 0, param1, ParameterDirection.Input); 
        command.Parameters.Add("PARAM2", OracleDbType.Int16, 0,param2, ParameterDirection.Input); 
        command.Connection.Open(); 
        count = Convert.ToInt16(command.ExecuteScalar()); 

        command.Connection.Close(); 
       } 
     } 

     return count > 0; 
    } 

的方法失敗，出現以下錯誤「ORA-01008：未綁定的所有變量」

如果我只用一個參數，那麼它的罰款，但是當我將其添加失敗，「ORA-01008第二：未綁定」

在此先感謝

Answer 1

command.CommandText = "select count(id) from Table1 " 
+ "where decode(Column1, :PARAM1, 1) = 1 AND decode(Column2, :PARAM2, 1) = 1";