oracle sql 存储过程、触发器、方法

阅读更多

 

1、存储过程

create or replace procedure logBigDataTrasfor
is
 queryEndDate Date:=to_date(to_char(sysdate - interval '3' month,'yyyy-MM-dd'),'yyyy-MM-dd');
 queryStartDate Date:=to_date(to_char(sysdate - interval '6' month,'yyyy-MM-dd'),'yyyy-MM-dd');
 idLog  CSSP_USER_ACCESS_LOG_V2.ID_LOG%type;
 idCsspUser  CSSP_USER_ACCESS_LOG_V2.id_cssp_user%type;
 idCsspOrg   CSSP_USER_ACCESS_LOG_V2.Id_Cssp_Org%type;
 accessDate  CSSP_USER_ACCESS_LOG_V2.ACCESS_DATE%type;
 url   CSSP_USER_ACCESS_LOG_V2.Url%type;
 systemFlag  CSSP_USER_ACCESS_LOG_V2.system_flag%type;
 type cur_type_ref is ref cursor;
 cur_data cur_type_ref; 
 sqlStr varchar2(2000);
 totalCount number;
 totalPages number;
 i number;
 v_startRecord number;
 v_endRecord number;
 errorCode number; 
 errorMsg varchar2(1000); 
 

Begin
   
  sqlStr:= 'select count(1) from  CSSP_USER_ACCESS_LOG_V2 v2 where v2.access_date<=to_date('''||queryEndDate||''') and  v2.access_date>= to_date('''||queryStartDate||''')';
  
  
   execute immediate sqlStr into totalCount;
   
   IF MOD(totalCount,500) = 0 THEN
       totalPages := totalCount / 500;
   ELSE
       totalPages := totalCount / 500 + 1;
   END IF;
   
   i:=1;
   
   
   for i in 1..totalPages LOOP  
       v_startRecord := (i - 1) * 500 + 1;
       v_endRecord := i * 500;

       sqlStr:= 'select tempFData.id_log,tempFData.id_cssp_user,tempFData.id_cssp_org,tempFData.access_date,tempFData.url,tempFData.system_flag from (select tempData.*,ROWNUM as rn  from (select * from CSSP_USER_ACCESS_LOG_V2 v2 where v2.access_date<=to_date('''||queryEndDate||''') and  v2.access_date>= to_date('''||queryStartDate||''') order by access_date desc) tempData  where ROWNUM<='||v_endRecord||') tempFData where tempFData.rn >= '||v_startRecord; 
       
       
       open cur_data for sqlStr;
       
       loop   
       fetch cur_data into idLog,idCsspUser,idCsspOrg,accessDate,url,systemFlag;  
       exit when cur_data%notfound; 
       insert into test_log_bak(id_log,id_cssp_user,id_cssp_org,access_date,url,system_flag)
              values(idLog,idCsspUser,idCsspOrg,accessDate,url,systemFlag); 
              
       end loop;   
       close cur_data;
       commit;
    end LOOP;
     EXCEPTION


           WHEN dup_val_on_index THEN 
                --重复操作
             errorCode := SQLCODE;  
             errorMsg := SUBSTR(SQLERRM, 1, 200);
             dbms_output.put_line(errorCode || ',' || errorMsg);
           
   
 END ;
 

 2、触发器

create or replace trigger test_big_data_user_insert_tr before insert or update
on EGISSMTSDATA.test_big_data_user for each row
declare
   date_created Date;
   date_updated Date;

begin
    date_created:=sysdate;
    date_updated:=sysdate;

    case
    when updating then
        :new.date_updated := date_updated;
    when inserting then
        :new.date_updated := date_updated;
        :new.date_created := date_created;
    end case;

end;

 3、方法

--创建表
create table EGISSMTSDATA.test_uid_code_table
(
  table_name     varchar2(100)  NOT NULL,
  table_id_val   number, 
  description    varchar2(300)
)
tablespace EGISSMTSDATA
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );

alter table EGISSMTSDATA.test_uid_code_table add constraint PK_TEST_TABLE_NAME primary key (table_name);

create public synonym test_uid_code_table for EGISSMTSDATA.test_uid_code_table; 


--插入数据
insert into test_uid_code_table(table_name,table_id_val,description) values('HELLOWORLD',0,'test')

select testNextVal('HELLOWORLD') from dual;

--function
create or replace function testNextVal(
    tableName in varchar2
)
return number
is
  currentVal  number;
  sqlStr varchar(2000);
  PRAGMA AUTONOMOUS_TRANSACTION;
begin
   
   select table_id_val into currentVal from test_uid_code_table  where table_name = tableName;
   currentVal:=currentVal+1;
   sqlStr:= 'update test_uid_code_table set table_id_val = '||currentVal ||'where table_name ='''||tableName||'''';
   
   EXECUTE immediate  sqlStr;
   commit;
return(currentVal);
end testNextVal;