下面这里面红色的字体都是干什么用的啊？？？？
CREATE OR REPLACE PACKAGE TOS_SP_AGENTMSTVERSSC
AS
TYPE AssocArrayChar_t IS TABLE OF CHAR INDEX BY BINARY_INTEGER;
TYPE CursorType IS REF CURSOR;
TYPE AssocArrayVarchar2_t IS TABLE OF VARCHAR2(1024) INDEX BY BINARY_INTEGER;
TYPE AssocArrayNVarchar2_t IS TABLE OF NVARCHAR2(1024) INDEX BY BINARY_INTEGER;
TYPE AssocArrayDate_t IS TABLE OF DATE INDEX BY BINARY_INTEGER;
  PROCEDURE GET_AGENTMSTVERS(v_agent_classvers IN VARCHAR2, v_seq IN VARCHAR2, v_facility_type_id IN VARCHAR2, v_withdata IN VARCHAR2, RefCur_MasterBO OUT CursorType, v_totalCount OUT VARCHAR2);
  PROCEDURE SET_AGENTMSTVERS(
  V_AGENT_CLASS IN AssocArrayVarchar2_t,
  V_NEW_AGENT_CLASS IN AssocArrayVarchar2_t,
  V_SEQ IN AssocArrayVarchar2_t,
  V_NEW_SEQ IN AssocArrayVarchar2_t,
  V_CREATE_DTIME IN AssocArrayDate_t,
  V_CREATE_STAFF_ID IN AssocArrayVarchar2_t,
  V_CREATE_STAFF_NAME IN AssocArrayNVarchar2_t,
  V_FACILITY_TYPE_ID IN AssocArrayVarchar2_t,
  V_UN_AGENT_CLASS IN AssocArrayVarchar2_t,
  V_UPDATE_DTIME IN AssocArrayDate_t,
  V_UPDATE_STAFF_ID IN AssocArrayVarchar2_t,
  V_UPDATE_STAFF_NAME IN AssocArrayNVarchar2_t,
  V_ACTIONFLAG IN AssocArrayChar_t,
  RegistrationType IN VARCHAR2,
  ErrorInfo OUT CLOB,
  SystemDate OUT DATE
  ) ;
END;


------解决方案--------------------
加了”index by binary_integer ”后，类型的下标就是自增长，不需要初始化，不需要每次extend增加一个空间，而如果没有这句话“index by binary_integer”，那就得要显示对初始化，且每插入一个元素到table中时，都需要先extend

------解决方案--------------------
定义不同的变量啊
------解决方案--------------------
自定义数据类型，变量在声明的时候就可以声明为这个类型的，就像变量声明为某个表的某个字段类型一样。
------解决方案--------------------
自定义数据类型,也叫ORACLE数据库对象。 像其他面向对象语言一样，ORACLE数据库对象也包括属性和方法。 
语法:
create type type_name as object (a number,b varchar2(10)，member function c return date);
而这个存储过程中的index by binary_integer，请看http://hi.baidu.com/hanbingxiaoshi/item/96ec1b2e4102120c72863eae