在Oracle中測試SplitStr函數的準確性,可以按照以下步驟進行:
CREATE TABLE test_data (
id NUMBER,
string_data VARCHAR2(100)
);
INSERT INTO test_data VALUES (1, 'apple,banana,orange');
INSERT INTO test_data VALUES (2, 'red,green,blue,yellow');
CREATE OR REPLACE FUNCTION SplitStr(p_string IN VARCHAR2)
RETURN SYS_REFCURSOR
IS
l_cursor SYS_REFCURSOR;
BEGIN
OPEN l_cursor FOR
SELECT TRIM(REGEXP_SUBSTR(p_string, '[^,]+', 1, LEVEL)) AS substring
FROM DUAL
CONNECT BY LEVEL <= REGEXP_COUNT(p_string, ',') + 1;
RETURN l_cursor;
END;
/
DECLARE
l_cursor SYS_REFCURSOR;
l_substring VARCHAR2(100);
BEGIN
OPEN l_cursor FOR
SELECT * FROM TABLE(SplitStr('apple,banana,orange'));
LOOP
FETCH l_cursor INTO l_substring;
EXIT WHEN l_cursor%NOTFOUND;
DBMS_OUTPUT.PUT_LINE(l_substring);
END LOOP;
CLOSE l_cursor;
END;
/
通過執行以上代碼,可以驗證SplitStr函數是否正確地將字符串按逗號分割并返回子字符串。可以根據需要修改測試數據和函數的參數,以驗證函數的準確性。