Oracle将以特定分隔的字符串转成表格的方法(用于类似游标的遍历)

CREATE OR REPLACE TYPE TY_OBJECT AS OBJECT(COL_NAME VARCHAR2(200));
/
CREATE OR REPLACE TYPE TY_TABLE AS TABLE OF TY_OBJECT;
/
CREATE OR REPLACE FUNCTION STR2TABLE(V_STR       IN VARCHAR2,
                                     V_DELIMITER IN VARCHAR2)
--此函数的目的是将以特定字符分隔的字符串转换为游标形式，以例遍历此游标
 RETURN TY_TABLE AS
  V_TY_TABLE TY_TABLE;
BEGIN
  SELECT TY_OBJECT(REGEXP_SUBSTR(V_STR,
                                 '[^' || V_DELIMITER || ']+',
                                 1,
                                 LEVEL,
                                 'i'))
    BULK COLLECT
    INTO V_TY_TABLE
    FROM DUAL
  CONNECT BY LEVEL <=
             LENGTH(V_STR) -
             LENGTH(REGEXP_REPLACE(V_STR, '' || V_DELIMITER || '', '')) + 1;
  RETURN V_TY_TABLE;
END;
/
--应用示例
SELECT * FROM TABLE(STR2TABLE('1,2,3',','));
/