C# e> 由VARCHAR2（30）编制的索引。这对该数据类型有效吗？如果是这样，它会将输入的新字符串[]{“id”，“value”}映射到键值对，还是将其映射到“0”->“id”，“1”->“value”？@MT0你是对的，我错过了。显然，它不适用于VARC

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e> 由VARCHAR2（30）编制的索引。这对该数据类型有效吗？如果是这样，它会将输入的

新字符串[]{“id”，“value”}

映射到键值对，还是将其映射到

“0”->“id”，“1”->“value”

？@MT0你是对的，我错过了。显然，它不适用于VARCHAR2（30）的

索引。在我的回答中，我更多地关注短语“必须注销tRESULT和tERRORMSG参数的值，而且我遇到了很大的困难”，在这种情况下，我不理解如何传递和获取参数。你能帮我吗？我不知道在这种情况下如何传递和获取参数。你能帮我吗？
PKG_ENTITY.ALTER_ENTITY (VARCHAR2 NAME, VARCHAR2 FULLNAME, ATTRS_TYPE ATTRS, VARCHAR2 STATUS, INTEGER OUT RESULT, VARCHAR2 OUT ERRORMSG). 

TYPE ATTRS_TYPE IS TABLE OF VARCHAR2(2000) INDEX BY VARCHAR2(30);

 private void ExecuteNonQuery(string query, params OracleParameter[] parameters)
 {
      using (var connection = new OracleConnection(_connectionString))
      {
            var command = new OracleCommand(query, connection) { CommandType = CommandType.Text };
            connection.Open();
            command.Parameters.AddRange(parameters);
            command.ExecuteNonQuery();
      }
 }

DECLARE
    tNAME varchar2(100);
    tATTRS PKG_ENTITY.ATTRS_TYPE;

    tRESULT INTEGER;
    tERRORMSG varchar2(100);


BEGIN

    tNAME := :pEntityId;

     tATTRS(:pPropId) := :pPropValue;

    PKG_ENTITY.ALTER_ENTITY(tUSERNAME,NULL,tATTRS,NULL,tRESULT,tERRORMSG);
END;

DECLARE
    tNAME varchar2(100);
    tATTRS PKG_ENTITY.ATTRS_TYPE;

    tRESULT INTEGER;
    tERRORMSG varchar2(100);


BEGIN

    tNAME := :pEntityId;

     tATTRS(:pPropId) := :pPropValue;

    PKG_USER.ALTER_USER(tUSERNAME,NULL,tATTRS,NULL,tRESULT,tERRORMSG);
    SELECT tRESULT, tERRORMSG FROM DUAL;
END;

private ProcedureResult ExecuteStoredProcedure(string procedureName)
{
    using (var connection = new OracleConnection(_connectionString))
    {
        var command = new OracleCommand(procedureName, connection) { CommandType = CommandType.StoredProcedure };
        connection.Open();
        command.Parameters.Add("NAME", OracleDbType.Varchar2, "New name", ParameterDirection.Input);
        command.Parameters.Add("FULLNAME", OracleDbType.Varchar2, "New fullname", ParameterDirection.Input);
        var attr = new EntityAttribute() { attribute1 = "id", attribute2 = "value"};
        command.Parameters.Add("ATTRS", EntityAttribute, "New fullname", ParameterDirection.Input);
        command.Parameters.Add("STATUS", OracleDbType.Varchar2, "Status", ParameterDirection.Input);
        command.Parameters.Add("RESULT", OracleDbType.Int32).Direction = ParameterDirection.Output;
        command.Parameters.Add("ERRORMSG", OracleDbType.Varchar2).Direction = ParameterDirection.Output;

        command.ExecuteNonQuery();

        return new ProcedureResult()
        {
            StatusCode = int.Parse(command.Parameters["RESULT"].Value.ToString()),
            Message = command.Parameters["ERRORMSG"].Value.ToString()
        };
    }
}

TYPE ATTRS_TYPE IS TABLE OF VARCHAR2 (2000) INDEX BY VARCHAR2 (30);

[OracleCustomTypeMapping("PKG_ENTITY.ATTRS_TYPE")]
public class EntityAttribute : INullable, IOracleCustomType
{
    [OracleObjectMapping("ATTRIBUTE1")]
    public string attribute1 { get; set; }
    [OracleObjectMapping("ATTRIBUTE2")]
    public string attribute2 { get; set; }

    public bool IsNull => throw new System.NotImplementedException();
    public void FromCustomObject(OracleConnection con, IntPtr pUdt)
    {
        throw new NotImplementedException(); 
    }

    public void ToCustomObject(OracleConnection con, IntPtr pUdt)
    {
        throw new NotImplementedException();
    }
}

PKG_ENTITY.ALTER_ENTITY (VARCHAR2 NAME, VARCHAR2 FULLNAME, ATTRS_TYPE ATTRS, VARCHAR2 STATUS, INTEGER OUT RESULT, VARCHAR2 OUT ERRORMSG)

.Parameters.Add("RESULT", OracleDbType.Int32).Direction = ParameterDirection.Output;

RESULT:= 0;

DECLARE
  tATTRS PKG_ENTITY.ATTRS_TYPE;
BEGIN
  tATTRS(:pPropId) := :pPropValue;

  PKG_USER.ALTER_USER(
    NAME     => :pEntityId,
    USERNAME => NULL,
    ATTRS    => tATTRS,
    STATUS   => NULL,
    RESULT   => :pResult,
    ERRORMSG => :pErrorMsg
  );
END;

var cmd = new OracleCommand("BEGIN PKG_ENTITY.ALTER_ENTITY(:NAME, :FULLNAME, :ATTRS, :STATUS, :RESULT, :ERRORMSG); END;"), connection);
cmd.CommandType = CommandType.Text;

// should work as well
// var cmd = new SqlCommand("PKG_ENTITY.ALTER_ENTITY(:NAME, :FULLNAME, :ATTRS, :STATUS, :RESULT, :ERRORMSG)"), connection);
// cmd.CommandType = CommandType.StoredProcedure;


cmd.Parameters.Add("NAME", OracleDbType.Varchar2, ParameterDirection.Input).Value = "New name"
cmd.Parameters.Add("FULLNAME", OracleDbType.Varchar2, ParameterDirection.Input).Value = "New fullname"

par = cmd.Parameters.Add("ATTRS", OracleDbType.Varchar2, ParameterDirection.Input);
par.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
var arr string[] = new string[] {"id" , "value"};
par.Value = arr;
par.Size = arr .Count;

cmd.Parameters.Add("STATUS", OracleDbType.Varchar2, ParameterDirection.Input).Value = "Status";
cmd.Parameters.Add("RESULT", OracleDbType.Int32, ParameterDirection.Output);
cmd.Parameters("RESULT").DbType = DbType.Int32;
cmd.Parameters.Add("ERRORMSG", OracleDbType.Varchar2, 100, null, ParameterDirection.Output);
cmd.Parameters("ERRORMSG").DbType = DbType.String;

cmd.ExecuteNonQuery();
var result = System.Convert.ToInt32(cmd.Parameters("RESULT").Value);
var errmsg = cmd.Parameters("ERRORMSG").Value.ToString();