一、拆分多个字符串:
1.创建一个object类型,这个类型有几列,定义如下:

create or replace type mytypeobject as object
(
p_string_1 varchar(1000),
p_string_2 varchar(1000) 
)
;

2.创建一个表类型,表的列是有上面的object类型

create or replace type str_splittableTwo as table of mytypeobject;

3.创建函数

CREATE OR REPLACE FUNCTION splitTwostr(p_string1 IN VARCHAR2,
p_string2 IN VARCHAR2,
p_delimiter IN VARCHAR2)
RETURN str_splittableTwo
PIPELINED AS
v_mytype mytypeobjectTwo;
v_length1 NUMBER := LENGTH(p_string1);
v_start1 NUMBER := 1;
v_index1 NUMBER;
v_length2 NUMBER := LENGTH(p_string2);
v_start2 NUMBER := 1;
v_index2 NUMBER;
BEGIN
WHILE (v_start1 <= v_length1) LOOP
v_index1 := INSTR(p_string1, p_delimiter, v_start1);
v_index2 := INSTR(p_string2, p_delimiter, v_start2);
IF v_index1 = 0 THEN
v_mytype := mytypeobjectTwo(SUBSTR(p_string1, v_start1),
SUBSTR(p_string2, v_start2));

PIPE ROW(v_mytype);
v_start1 := v_length1 + 1;
v_start2 := v_length2 + 1;
ELSE
v_mytype := mytypeobjectTwo(SUBSTR(p_string1,
v_start1,
v_index1 - v_start1),
SUBSTR(p_string2,
v_start2,
v_index2 - v_start2));
PIPE ROW(v_mytype);
v_start1 := v_index1 + 1;
v_start2 := v_index2 + 1;
END IF;
END LOOP;
RETURN;
END splitTwostr;

二、拆分一个字符串

1.只需要创建一个表类型,每行类型按需求自定义

CREATE OR REPLACE TYPE mytypelist IS TABLE OF VARCHAR2 (4000);

 

2.创建函数
CREATE OR REPLACE FUNCTION splitstr(p_string IN VARCHAR2, p_delimiter IN VARCHAR2)
  RETURN 

mytypelist


  PIPELINED
AS
  v_length  NUMBER := LENGTH(p_string);
  v_start  NUMBER := 1;
  v_index  NUMBER;
BEGIN
  WHILE(v_start <= v_length)
  LOOP
    v_index := INSTR(p_string, p_delimiter, v_start);
    IF v_index = 0
    THEN
      PIPE ROW(SUBSTR(p_string, v_start));
      v_start := v_length + 1;
    ELSE
      PIPE ROW(SUBSTR(p_string, v_start, v_index - v_start));
      v_start := v_index + 1;
    END IF;
  END LOOP;
  RETURN;
END splitstr;

 

 

调用:

select * from table(splitstr('Hello,Cnblogs!',','));
posted on 2011-04-18 07:43  小傻瓜  阅读(1413)  评论(0编辑  收藏  举报