首先是写一个分割字符串的函数，返回table类型
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CREATE OR REPLACE FUNCTION fn_split (p_str IN VARCHAR2, p_delimiter IN VARCHAR2)RETURN ty_str_splitIS 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
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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
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select fn_ispng('dfdfd.png') from dual; |
以上所述是小编给大家介绍的oracle 函数判断字符串是否包含图片格式，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://www.cnblogs.com/lovehersister/archive/2017/07/13/7163167.html
