--建立序列

create sequence seq_map_param_id ;

--建立參數表

create table map_param(id number primary key , tname varchar2(30)) ;

--初始化

insert into map_param values (seq_map_param_id.nextval , 'EMP')? ?;

insert into map_param values (seq_map_param_id.nextval , 'DEPT') ;

CREATE OR REPLACE PACKAGE BODY utl_map_2 is

PROCEDURE output_map (p_in_tname VARCHAR2,p_in_idx_col_name VARCHAR2 DEFAULT '') IS

tb_count number ;

l_col_type user_tab_cols.DATA_TYPE%type;

main_sql? ?varchar2(32767);

BEGIN

--各種判斷

--表是否存在

select count(*) into tb_count from user_tables where table_name=p_in_tname ;

if tb_count = 0 then

raise_application_error(-20999,'Table not found') ;

end if ;

--列是否存在，map key column類型是否正確

begin

select data_type into l_col_type

from user_tab_cols col

where col.TABLE_NAME=p_in_tname

and col.COLUMN_NAME=p_in_idx_col_name ;

if l_col_type not in ('VARCHAR2') then

raise_application_error(-20999,'idx column only varchar2');

end if ;

exception

when no_data_found then

raise_application_error(-20999,'Column not found in table '||p_in_tname) ;

end ;

--example:declare cursor cur is select * from EMP ; begin for rec in cur loop utl_var_2.EMP_list(rec.ENAME) := rec ; end loop ; end;

main_sql? ? := 'declare ' ||

'cursor cur is select * from '||p_in_tname||' ; ' ||

'begin ' ||

'for rec in cur loop ' ||

'utl_var_2.'||p_in_tname||'_list(rec.'||p_in_idx_col_name||') := rec ; '||

'end loop ; '||

'end;' ;

execute immediate main_sql ;

--dbms_output.put_line(main_sql) ;

END ;

PROCEDURE var_init??is

pkg_dec_sql varchar2(32767) ;

CURSOR param_cur is select * from map_param ;

begin

pkg_dec_sql := 'create or replace package utl_var_2 is ' ;

for rec in param_cur loop

pkg_dec_sql := pkg_dec_sql || 'type t_'||rec.tname||' is table of '||rec.tname||'%rowtype index by varchar2(4000)??; '||

rec.tname||'_list t_'||rec.tname||' ; ' ;

end loop ;

/*

example :

create or replace package utl_var_2 is

type t_EMP is table of EMP%rowtype index by varchar2(4000);

EMP_list t_EMP;

type t_DEPT is table of DEPT%rowtype index by varchar2(4000);

DEPT_list t_DEPT;

end;

*/

pkg_dec_sql := pkg_dec_sql || ' end ; ';

execute immediate pkg_dec_sql ;

end var_init ;

END utl_map_2 ;

SQL> begin

2??utl_map_2.output_map(p_in_tname => 'DEPT', p_in_idx_col_name => 'LOC');

3??dbms_output.put_line('deptno : '||utl_var_2.dept_list('NEW YORK').deptno ||' loc : ' ||utl_var_2.dept_list('NEW YORK').loc ) ;

4??end ;

5??/

deptno : 10 loc : NEW YORK

PL/SQL procedure successfully completed

SQL> begin

2??utl_map_2.output_map(p_in_tname => 'EMP', p_in_idx_col_name => 'ENAME');

3??dbms_output.put_line('ename : '||utl_var_2.emp_list('SMITH').ename ||' job : ' ||utl_var_2.emp_list('SMITH').job ) ;

4??end ;

5??/

ename : SMITH job : CLERK

PL/SQL procedure successfully completed

不過每次配置后的時候需要手動重新執行以下初始化程序 utl_map_2.var_init

總結

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