ORACLE 建立帶引數檢視-實踐
阿新 • • 發佈:2019-02-13
PS:最近在做一個需求,移交A人多個業務表(7個)的資料給另幾個人(就是查詢出A的業務資料,把相應欄位改成其他人),想到的辦法就是建立一個檢視union all 所有業務表。根據A編號去查詢業務資料,所以考慮通過每個業務表加上客戶編號去過濾資料,提高查詢效能。但是這個客戶編號是動態的,使用普通檢視就不能在每個業務表過濾了,在網上查詢,檢視是可以帶引數的,所以實踐下,並記錄。
下面是使用步驟:
1.建立一個package,包中定義兩個方法,一個set值的方法,一個get值的方法
--定義包 create or replace package view_move_user is --set值方法 function set_moveuser(moveuser varchar2) return varchar2; --get值方法 function get_moveuser return varchar2; end view_move_user; |
2.建立package body,實現package中的兩個方法
--包方法實現 create or replace package body view_move_user is paramValue varchar2(32); -- 給paramValue賦值 function set_moveuser(moveuser varchar2) return varchar2 is begin paramValue := moveuser; return moveuser; end; --返回paramValue 的值 function get_moveuser return varchar2 is begin return paramValue; end; end view_move_user; |
3.建立帶引數檢視view_move_user.get_moveuser()是從方法中獲取傳入的引數
Create View view_move1 As select busi_segment,busi_id,move_user from ( select '005' as busi_segment, archive_id as busi_id, loan_com_id as move_user from Doc_Archive where archive_type = '1' and is_temp is null and loan_com_id=view_move_user.get_moveuser() union all select '004' as busi_segment, staging_id as busi_id, loan_com_id as move_user from Doc_Staging where status <> '5' and loan_com_id=view_move_user.get_moveuser() union all select '003' as busi_segment, loan_input_id as busi_id, confirmer_id as move_user from Pvp_Loan_Input where input_status <> '30' and confirmer_id=view_move_user.get_moveuser() union all select '002' as busi_segment, loan_no as busi_id, loan_com_id as move_user from Pvp_Loan_Apply where approve_status not in( '000','990','998') and loan_com_id=view_move_user.get_moveuser() union all select '001' as busi_segment, cont_no as busi_id, loan_com_id as move_user from Ctr_Cont_Apply where approve_status not in( '000') and loan_com_id=view_move_user.get_moveuser() union all select '006' as busi_segment, task_id as busi_id, loan_com_id as move_user from Pvp_Repay_Fee_Make where approve_status ='000' and loan_com_id=view_move_user.get_moveuser() union all select '007' as busi_segment, sign_input_id as busi_id, cont_sign_user as move_user from Ctr_Sign where input_status ='10' and cont_sign_user=view_move_user.get_moveuser() ); |
4.查詢檢視語句view_move_user.set_moveuser('20805') ='20805' 通過set方法,傳入20805
select * from view_move1 where view_move_user.set_moveuser('20805') ='20805' ; |
5.根據PLSQL檢視執行效率(取本次最多資料量的資料5775,分別執行5次,單位:s)
PLSQL執行計劃
無引數檢視:
帶引數檢視未設定索引:
帶引數檢視-設定索引:
6.總結
帶引數檢視-設定索引的執行計劃明顯比其他兩個好看