Oracle 自定义split 函数实例详解

CREATE OR REPLACE TYPE ty_str_split IS TABLE OF VARCHAR2 (4000);CREATE OR REPLACE FUNCTION fn_var_split (  p_str IN VARCHAR2,  p_delimiter IN VARCHAR2)  RETURN ty_str_splitIS  j INT := 0;  len INT := 0;  str VARCHAR2 (4000);  str_split ty_str_split := ty_str_split ();  v_str VARCHAR2 (4000) := RTRIM (LTRIM (p_str, p_delimiter), p_delimiter);BEGIN  len := LENGTH (v_str);  WHILE len > 0  LOOP    j := INSTR (v_str, p_delimiter, 1);    IF j = 0    THEN      str := SUBSTR (v_str, 1);      len := 0;      str_split.EXTEND;      str_split (str_split.COUNT) := str;    ELSE      str := SUBSTR (v_str, 1, j - 1);      v_str := LTRIM (LTRIM (v_str, str), p_delimiter);      len := LENGTH (v_str);      str_split.EXTEND;      str_split (str_split.COUNT) := str;    END IF;  END LOOP;  RETURN str_split;END fn_var_split;/

112123123412345 

DECLARE  CURSOR c  IS    SELECT * FROM TABLE (CAST (fn_var_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;/