oracle 分逗号分隔字符串函数

输入示例：select  fn_split('1,2,3,4,5',',') from dual

输出值：

1

2

3

4

5

 

当做TABLE的用法：

 select * from  TABLE(CAST(fn_split('中国,美国,日本', ',') AS ty_str_split)) a

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先执行：

CREATE OR REPLACE TYPE "TY_STR_SPLIT"   IS TABLE OF VARCHAR2 (32000)

在执行

CREATE OR REPLACE FUNCTION fn_split(p_str IN VARCHAR2,
p_delimiter IN VARCHAR2)
RETURN ty_str_split IS
j INT := 0;
i INT := 1;
len INT := 0;
len1 INT := 0;
str VARCHAR2(32000);
str_split ty_str_split := ty_str_split();
BEGIN
len := LENGTH(p_str);
len1 := LENGTH(p_delimiter);

WHILE j < len LOOP
j := INSTR(p_str, p_delimiter, i);

IF j = 0 THEN
j := len;
str := SUBSTR(p_str, i);
str_split.EXTEND;
str_split(str_split.COUNT) := str;

IF i >= len THEN
EXIT;
END IF;
ELSE
str := SUBSTR(p_str, i, j - i);
i := j + len1;
str_split.EXTEND;
str_split(str_split.COUNT) := str;
END IF;
END LOOP;

RETURN str_split;
END fn_split;