oracle table split q,oracle数据库split()步骤的实现与测试

oracle数据库split()方法的实现与测试

1 参考资料:http://sonic10101.iteye.com/blog/394187

2 具体SQL:

CREATE OR REPLACE TYPE ty_str_split IS TABLE OF VARCHAR2 (4000)

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;

3 测试SQL

select fn_split('1,2,3,4,',',') from dual;

select t.* from (SELECT * FROM TABLE (CAST (fn_split ('1;;12;;123;;1234;;12345', ';;') AS ty_str_split)))t

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