oracle使用split_type分割字符串

CREATE OR REPLACE FUNCTION A_Test1(I_VAL VARCHAR2) RETURN VARCHAR2 is
     v_batch_col split_type;
     v_item_batch VARCHAR2(100);
 BEGIN
     select SPLIT(I_VAL,'@') into v_batch_col from dual;
     select column_value into v_item_batch from(select rownum rn,t1.column_value from table(v_batch_col) t1) where rn = 1;
     RETURN v_item_batch;
 EXCEPTION
     WHEN OTHERS THEN
          RETURN '错误';
 END A_Test1;

1、定义一个 split_type 类型的变量

2、使用split函数分割字符串并赋值给 v_batch_col            --select SPLIT(I_VAL,'@') into v_batch_col from dual;

3、使用变量接收分割后的值            --select column_value into v_item_batch from(select rownum rn,t1.column_value from table(v_batch_col) t1) where rn = 1;

 

 

split函数

CREATE OR REPLACE FUNCTION "SPLIT" (
    p_str       IN VARCHAR2,
    p_delimiter IN VARCHAR2 default(',') --分隔符，默认逗号
)
    RETURN split_type
IS
    j INT := 0;
    i INT := 1;
    len INT := 0;
    len1 INT := 0;
    str VARCHAR2 (4000);
    my_split split_type := split_type ();
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);
             my_split.EXTEND;
             my_split (my_split.COUNT) := str;

            IF i >= len
            THEN
                EXIT;
            END IF;
        ELSE
            str := SUBSTR (p_str, i, j - i);
            i := j + len1;
            my_split.EXTEND;
            my_split (my_split.COUNT) := str;
        END IF;
    END LOOP;

    RETURN my_split;
END split;