Oracle の ty_str_split + MySQL の proc_split

 

 

oracle实现字符串分割

功能描述：用指定分隔符切割输入的字符串，返回一维数组，每个数组元素为一个子串。

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

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 (4000);
  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;
/

 

测试

DECLARE
  CURSOR c
  IS
    SELECT *
      FROM TABLE (CAST (fn_split ('1;;12;;123;;1234;;12345', ';;') AS ty_str_split
                  )
              );

  r c%ROWTYPE;
BEGIN
  OPEN c;

  LOOP
    FETCH c INTO r;

    EXIT WHEN c%NOTFOUND;
    DBMS_OUTPUT.put_line (r.column_value);
  END LOOP;

  CLOSE c;
END;

 结果

http://blog.csdn.net/a9529lty/article/details/3810905

/************************************************************************/

mysql:

先说调用方法
call proc_split('a,b,c',',');
select * from splittable

存储过程

CREATE  PROCEDURE `proc_split`(
    inputstring varchar(1000),
      delim char(1)
)
      NOT DETERMINISTIC
      CONTAINS SQL
      SQL SECURITY DEFINER
      COMMENT ''
begin
      declare strlen int;
      declare last_index int;
      declare cur_index int;
      declare cur_char VARCHAR(200);
      declare len int;
      set cur_index=1;
      set last_index=0;
    set strlen=length(inputstring);
      drop temporary table if exists splittable;/**/
      create TEMPORARY table splittable(
            id int AUTO_INCREMENT,
            value VARCHAR(20),
            PRIMARY KEY (`ID`),
            UNIQUE KEY `ID` (`ID`)
      ) ;
      WHILE(cur_index<=strlen) DO     
      begin
            if substring(inputstring from cur_index for 1)=delim or cur_index=strlen then
              set len=cur_index-last_index-1;
              if cur_index=strlen then
                 set len=len+1;
              end if;
              insert into splittable(`value`)values(substring(inputstring from (last_index+1) for len));
                  set last_index=cur_index;
            end if;
            set cur_index=cur_index+1;
      END;
      end while;
end