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INFORMIX和ORACLE的存储过程的异同

INFORMIX和ORACLE的存储过程的异同

的有关信息介绍如下:

INFORMIX和ORACLE的存储过程的异同

1、建立存储过程的语法

1)Informix

create procedure proc_name( [....in_parameter_list])

returning out_para_list / out_result_set;

2)oracle

create [or replace] procedure procedue_name

[ (arg1 [ {in | out | in out }] type

(argn [ {in | out | in out }] type,)]

{is | as} --代替DECLARE关键字

[ 变量定义区]

begin

end procedure_name;

2、错误捕捉

1)Informix

使用

on exception

end exception

2)Oracle

使用

exception

when others then

3、对游标的处理

1)Informix

create procedure pHasCursor()

define v_f1 integer;

begin

on exception

rollback work;

return;

end exception

begin work;

foreach curt1 with hold for

select f1 into v_f1 from t1 -- 注意这里没有分号

if (v_f1 = 1) then

update t1 set f2 = 'one' where current of curt1;

elif (v_f1 = 2) then

update t1 set f2 = 'two' where current of curt1;

else

update t1 set f2 = 'others' where current of curt1;

end if;

end foreach;

commit work;

end;

end procedure;

2)Oracle

create or replace procedure pHasCursor

as

v_f1 number(10,0);

cursor curt1 is

select f1 from t1 for update;

begin

open curt1;

loop

fetch curt1 into v_f1;

exit when curt1%notfound;

if (v_f1 = 1) then

update t1 set f2 = 'one' where current of curt1;

elsif (v_f1 = 2) then

update t1 set f2 = 'two' where current of curt1;

else

update t1 set f2 = 'others' where current of curt1;

end if;

end loop;

commit;

return;

exception

when others then

begin

rollback;

end;

end pHasCursor;

3、在存储过程中调用另外一个存储过程

1)Informix

Call pNoParam();

Call pNormalParam(1, ‘a’) returning v_Result;

2)Oracle

pNoParam;

pNormalParam(1, ‘a’, v_Result);

4、日期操作

1)Informix

define cur_dtime_var datetime year to second;

当前日期时间: let cur_dtime_var = current; -- datetime

2) Oracle

Currtime date;

Currtime := sysdate;

5、关于参数的说明

如果存储过程想返回一个参数,在informix中是通过返回值的形式实现的,而在oracle是通过输出参数或者输入输出参数实现的。

举例:

1)Informix:

create procedure p1() returning integer;

return 0;

end procedure;

2)oracle:

create or replace procedure p1(x out number)

as

begin

x := 0;

end p1;

6、赋值

1)informix

let v_1 = 100;

2)oracle

v_1 := 100;

7、if语句

1)informix

if (v_1 =100) then

elif (v_1=200) then

Else

end if;

2)oracle

if (v_1 =100) then

elsif (v_1=200) then

Else

end if;