Oracle中增加Split函数

首先，我们增加一个表类型:

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

其实，我们增加相对应的Split函数，该 函数返回ty_str_split表类型

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;

接下来我们测试

SELECT * FROM TABLE(FN_SPLIT('1#2#3#,4','#'))