oracle自定义分割字符串函数

CREATE OR REPLACE TYPE strSplitResult IS TABLE OF VARCHAR2 (4000);

CREATE OR REPLACE FUNCTION splitStr(str IN VARCHAR2, regex IN VARCHAR2)--字符串,符号(正则表达式)
    RETURN strSplitResult 
    PIPELINED
AS
    v_length   NUMBER := LENGTH(str);
    v_start    NUMBER := 1;
    v_index    NUMBER;
BEGIN
    WHILE(v_start <= v_length)
    LOOP
        v_index := INSTR(str, regex, v_start);

        IF v_index = 0
        THEN
            PIPE ROW(SUBSTR(str, v_start));
            v_start := v_length + 1;
        ELSE
            PIPE ROW(SUBSTR(str, v_start, v_index - v_start));
            v_start := v_index + 1;
        END IF;
    END LOOP;

    RETURN;
END splitStr;

 

select * from table(splitStr('Hello,my world',','));