oracle字符串分割和提取函数定义

oracle字符串分割和提取

分割

create or replace function Get_StrArrayLength
(
av_str varchar2, --要分割的字符串
av_split varchar2 --分隔符号
)
return number
is
lv_str varchar2(1000);
lv_length number;
begin
lv_str:=ltrim(rtrim(av_str));
lv_length:=0;
while instr(lv_str,av_split)<>0 loop
lv_length:=lv_length+1;
lv_str:=substr(lv_str,instr(lv_str,av_split)+length(av_split),length(lv_str));
end loop;
lv_length:=lv_length+1;
return lv_length;
end Get_StrArrayLength;

提取

create or replace function Get_StrArrayStrOfIndex
(
av_str varchar2, --要分割的字符串
av_split varchar2, --分隔符号
av_index number --取第几个元素
)
return varchar2
is
lv_str varchar2(1024);
lv_strOfIndex varchar2(1024);
lv_length number;
begin
lv_str:=ltrim(rtrim(av_str));
lv_str:=concat(lv_str,av_split);
lv_length:=av_index;
if lv_length=0 then
lv_strOfIndex:=substr(lv_str,1,instr(lv_str,av_split)-length(av_split));
else
lv_length:=av_index+1;
lv_strOfIndex:=substr(lv_str,instr(lv_str,av_split,1,av_index)+length(av_split),instr(lv_str,av_split,1,lv_length)-instr(lv_str,av_split,1,av_index)-length(av_split));
end if;
return lv_strOfIndex;
end Get_StrArrayStrOfIndex;