不幸的是,我的数据库经验大部分都与MSSQL有关,它比Oracle更倾向于您的手。我想要做的事情在tSQL中相当微不足道,但是,pl/sql让我头疼。从Oracle存储过程中返回的XML
我有以下步骤:
CREATE OR REPLACE PROCEDURE USPX_GetUserbyID (USERID USERS.USERID%TYPE, USERRECORD OUT XMLTYPE) AS
BEGIN
SELECT XMLELEMENT("user"
, XMLATTRIBUTES(u.USERID AS "userid", u.companyid as "companyid", u.usertype as "usertype", u.status as "status", u.personid as "personid")
, XMLFOREST( p.FIRSTNAME AS "firstname"
, p.LASTNAME AS "lastname"
, p.EMAIL AS "email"
, p.PHONE AS "phone"
, p.PHONEEXTENSION AS "extension")
, XMLELEMENT("roles",
(SELECT XMLAGG(XMLELEMENT("role", r.ROLETYPE))
FROM USER_ROLES r
WHERE r.USERID = USERID
AND r.ISACTIVE = 1
)
)
, XMLELEMENT("watches",
(SELECT XMLAGG(
XMLELEMENT("watch",
XMLATTRIBUTES(w.WATCHID AS "id", w.TICKETID AS "ticket")
)
)
FROM USER_WATCHES w
WHERE w.USERID = USERID
AND w.ISACTIVE = 1
)
)
) AS "RESULT"
INTO USERRECORD
FROM USERS u
LEFT JOIN PEOPLE p ON p.PERSONID = u.PERSONID
WHERE u.USERID = USERID;
END USPX_GetUserbyID;
执行时,它应该返回的XML文档结构如下:
<user userid="" companyid="" usertype="" status="" personid="">
<firstname />
<lastname />
<email />
<phone />
<extension />
<roles>
<role />
</roles>
<watches>
<watch id="" ticket="" />
</watches>
</user>
当我执行查询本身,更换与userid参数一个字符串并删除“into”子句,查询运行良好并返回预期的结构。
然而,当程序试图执行查询,XMLELEMENT函数的结果传递到USERRECORD输出参数,我得到以下异常:
Error report: ORA-01422: exact fetch returns more than requested number of rows ORA-06512: at "USPX_GETUSERBYID", line 4 ORA-06512: at line 3
01422. 00000 - "exact fetch returns more than requested number of rows"
*Cause: The number specified in exact fetch is less than the rows returned.
*Action: Rewrite the query or change number of rows requested
我感到困惑,试图敲定下来,不幸的是我的google-fu没有帮助。我发现了很多Oracle SQL | XML示例,但没有一个处理XML从过程返回。
注意:我知道使用DBMS方法检索XML的替代方法存在,但是,我的理解是,该功能已被弃用,以支持SQL | XML。
谢谢!改变输入参数完美。 – 2010-03-25 10:55:49
好的。没有看到。 – dacracot 2010-03-25 15:10:32