在C#中使用varchar2使用PL/SQL assoc数组索引 [英] using PL/SQL assoc array index by varchar2 in C#

问题描述

我有PL/SQL代码:

I have PL/SQL code:

create or replace 
package        TEST_PKG2 as
  type AssocArray is table of varchar2(20) index by binary_integer;
  type AssocArray_varchar is table of varchar2(20) index by varchar2(10);
  --type AssocArray_varchar is table of varchar2(20) index by integer;

  function assoc_arry_return(Param1 in AssocArray) return AssocArray_varchar;
end TEST_PKG2;

create or replace 
package body        TEST_PKG2 as 
  function assoc_arry_return(Param1 in AssocArray) return AssocArray_varchar
    is
  v_return_value AssocArray_varchar;    
  begin
    v_return_value('name1'):=Param1(1);
    v_return_value('name2'):=Param1(2);
    v_return_value('name3'):=Param1(3);

    return v_return_value;
  end assoc_arry_return;
end TEST_PKG2; 

控制代码以检查pl/sql:

controle code to check pl/sql:

set serveroutput on
declare
  assoc_array test_pkg2.AssocArray;
  assoc_array_return test_pkg2.AssocArray_varchar;

begin
  assoc_array(1):='test1';
  assoc_array(2):='test2';
  assoc_array(3):='test3';
  assoc_array_return:= test_pkg2.assoc_arry_return(assoc_array);
  dbms_output.put_line(assoc_array_return.first||' - '||assoc_array_return(assoc_array_return.first));
end;

和用于执行此功能的C#代码:

and C# code for execute this function:

command = new OracleCommand("TEST_PKG2.assoc_arry_return", OracleConnection);
                command.CommandType = CommandType.StoredProcedure;
                OracleParameter return_value = new OracleParameter();
                return_value.OracleDbType = OracleDbType.Varchar2;
                return_value.Direction = ParameterDirection.ReturnValue;
                return_value.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
                return_value.Size=3;
                return_value.ArrayBindSize = new int[3] { 20, 20, 20 };
                command.Parameters.Add(return_value);

                OracleParameter Param4 = command.Parameters.Add("Param1", OracleDbType.Varchar2);
                Param4.Direction = ParameterDirection.Input;
                Param4.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
                Param4.Value = new string[3] { "First Element", "Second Element", "Third Element" };
                Param4.Size = 3;
                Param4.ArrayBindSize = new int[3] { 20, 20, 20 };
                Param4.ArrayBindStatus = new OracleParameterStatus[3] { OracleParameterStatus.Success, OracleParameterStatus.Success, OracleParameterStatus.Success };
                command.ExecuteNonQuery();

当我用thic代码执行应用时，执行死于最后一行，错误为"ORA-06550:第1行，第15列: PLS-00382:表达式的类型错误 ORA-06550:第1行，第7列: PL/SQL:语句被忽略"

When I execute app with thic code, execution dies on last line with error "ORA-06550: Line 1, column 15: PLS-00382: expression is of wrong type ORA-06550: Line 1, column 7: PL/SQL: Statement ignored"

当我使用由varchar2索引的assoc数组时，这是一种特殊情况. 当我按整数类型的包中的返回类型(通过注释行代码id的包)更改索引时，一切正常.

This is a special case, when I use assoc array indexed by varchar2. when I change index by of return type in package on integer (commented out line code id package), all is OK.

您知道如何在C#中使用此程序包吗?

Do you have any idea how use this package in C#?

谢谢

推荐答案

所以我尝试使用数据类型对象.

So I tried to use a data type object.

第一步，我创建data_type对象

In first step I create data_type object

create or replace type STB_JIG_TARLOG_VALUE as object
(
    NAME varchar2(300),
    VALUE varchar2(500)
)

和

create or replace type
    STB_JIG_TARLOG_VALUES is table of STB_JIG_TARLOG_VALUE 

它们不是包装的一部分.

They are not part of package.

我现在也可以将此类型用作函数的返回类型:

I can now use this type also as the return type of the function:

function get_data(...) return STB_JIG_TARLOG_VALUES
  is 
   items STB_JIG_TARLOG_VALUES := STB_JIG_TARLOG_VALUES();
  begin
   items.extend;
   items(1):= STB_JIG_TARLOG_VALUE('key_name','key_value');
   ...
end get_data;

最后，我们只需选择以下内容即可得到返回值:

and finally we get the return value simply select:

select * from table (get_data(...));

列名称在STB_JIG_TARLOG_VALUE中定义，并且将值添加到返回值的方式可以不同(例如，循环...)

Names of columns are defined in STB_JIG_TARLOG_VALUE and adding value to the return value can be different ways (for example loop...)

DataReader不会从此查询中获取数据.

And get data from this query is not problem with DataReader.

这篇关于在C#中使用varchar2使用PL/SQL assoc数组索引的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！