oracle中将字符串转换成数组

--- 将字符串转换成数组,并根据需要返回指定位置的数组成员

create or replace function GetElementFromArrayByIndex(Liststr in varchar2,sPlitVal in varchar2,iPos integer) return varchar2 is

/*

Liststr--传入将要被分割的字符串

sPlitVal--用来分割的字符串

iPos--获取分割后的数组中该位置的元素值

*/

type tt_type is table of varchar2(100) INDEX BY BINARY_INTEGER;

V1 tt_type;

--FieldNames转化为数组

TmpStr varchar2(100);

Str varchar2(4000);

j integer;

begin

Str := Liststr;

j := 0;

IF Instr(Liststr, sPlitVal, 1, 1) = 0 THEN

V1(j) := Liststr;

j := j + 1;

else

While Instr(str, sPlitVal, 1, 1) > 0 Loop

TmpStr := Substr(str, 1, Instr(str, sPlitVal, 1, 1) - 1);

V1(j) := TmpStr;

str := SubStr(Str, Instr(str, sPlitVal, 1, 1) + length(sPlitVal), length(str));

j := j + 1;

end loop;

if not str is null then

--将最后一个保存

V1(j) := str;

j := j + 1;

end if;

end if;

if iPos>j-1 or iPos<0 then

--超出数组长度

return '';

end if;

return V1(ipos);

end;