Oracle常用封装函数

 --根据指定的字符与分隔符，对字符串进行拆分，返回表值类型的结果集

CREATE OR REPLACE FUNCTION MES1.strsplit(p_str       IN VARCHAR2 --字符串
                                        ,
                                         p_delimiter IN VARCHAR2 --分隔符
                                         ) RETURN ty_str_split IS
  --根据指定的字符与分隔符，对字符串进行拆分，返回表值类型的结果集
  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;

SELECT COLUMN_VALUES AS DATA1, ROWNUM RN
FROM ( SELECT * FROM TABLE (MES1.STRSPLIT_TABLE_WQY ('1,2,3,', ',')))

SELECT MES1.STRSPLIT_WQY ('1,2,3,', ',') FROM DUAL