Oracle の ty_str_split + MySQL の proc

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

巴特西

Oracle の ty_str_split + MySQL の proc_split

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