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  • oracle 函数判断字符串是否包含图片格式

    首先是写一个分割字符串的函数,返回table类型

    CREATE OR REPLACE FUNCTION fn_split (p_str IN VARCHAR2, p_delimiter IN VARCHAR2)
    RETURN ty_str_split
    IS
        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 fn_split;

    上面这个函数可以将字符串分割返回table

    create or replace function fn_ispng(
                                             strpng   in varchar2
                                             ) return number is
      v_num    number;
    begin
         WITH t1 AS
        (select * from table (fn_split(strpng,'.'))
        )


     select count(1) into v_num  from t1 where  t1.column_value in ('png', 'jpg','jpeg','gif','bmp','eps');

      return v_num;
    end fn_ispng;

    上面这个是判断是否是图片格式,的图片格式返回1

    select  fn_ispng('dfdfd.png')     from  dual;

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  • 原文地址:https://www.cnblogs.com/lovehersister/p/7163167.html
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