表变量 表中的值函数
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【中文标题】表变量 表中的值函数【英文标题】：Table Variable In a table Valued function 【发布时间】：2013-08-22 14:07:36 【问题描述】：尝试启动此表值函数时出现错误。当我尝试修改它时出现错误。这是
关键字“Declare”附近的语法不正确。
但是，当我在函数之外使用它时，一切都很好。所以我只是想知道我是否缺少某些东西，或者我应该如何做。谢谢。
ALTER FUNCTION [dbo].[XXX]( @i_contactkey int,
@v_scope varchar(15),
@i_entrykey int = null,
@i_staffcontactkey int = null,
@d_startdate datetime,
@d_today datetime)
RETURNS TABLE
AS begin
Declare @temp as table
(contactkey int, contactkey1 int, rolekey1 int,contactkey2 int, rolekey2 int, relationshipid int)
insert into @temp (contactkey , contactkey1 , rolekey1 ,contactkey2 , rolekey2 , relationshipid )
select contactkey , contactkey1 , rolekey1 ,contactkey2 , rolekey2 , relationshipid
from contact clcon
LEFT JOIN contactassociation ca on ca.contactkey2 = clcon.contactkey where ca.rolekey1 in (4,5,6)
and ca.relationshipid = 181
and ca.activeind = 1
and ca.associationkey = (select top 1 associationkey
from contactassociation
where contactkey2 = clcon.contactkey and activeind = 1
and relationshipid = 181
and rolekey1 in (4,5,6)
order by begindate desc)
SELECT
clcon.contactkey'ClientId',
clcon.Stat'ClientStatus',
ctacct.optiondesc'account',
ctlvl.optiondesc'levelid',
(clcon.lastname+', '+clcon.firstname)'ClientName',
clcon.firstname'ClientFirstName',
clcon.lastname'ClientLastName',
clcon.addressline1'address1',
clcon.addressline2'address2',
clcon.city'city',
dbo.getcnfgoption(81,clcon.stateid,'D')'state',
clcon.zipcode'zipcode',
clcon.mainphone'mainphone',
cgcon.contactkey'cgkey',(cgcon.firstname+' '+cgcon.lastname)'CGName',
cgcon.firstname'CGFirstName',
cgcon.lastname'CGLastName',
cgcon.addressline1'cgaddressline1',
cgcon.addressline2'cgaddressline2',
cgcon.city'cgcity',
dbo.getcnfgoption(81,cgcon.stateid,'D')'cgstate',
cgcon.zipcode'cgzipcode',
cgcon.mainphone'cgmainphone',
dbo.getClientAltCGKeys_JSON(clcon.contactkey,'J')'AltCGsJSON',
--dbo.getClientAltCGKeys(clcon.contactkey,'C')'AltCGNames',
--dbo.getClientAltCGKeys(clcon.contactkey,'L')'altcgnamekeyslast',
--dbo.getClientAltCGKeys(clcon.contactkey,'A')'altcgkeysaddress',
dbo.getClientEventCount(clcon.contactkey, 'M', @d_startdate, @d_today) 'MLOA',
dbo.getClientEventCount(clcon.contactkey, 'N', @d_startdate, @d_today) 'NMLOA',
dbo.getClientEventCount(clcon.contactkey, 'A', @d_startdate, @d_today) 'Alts',
dbo.getClientEventCount(clcon.contactkey, 'S', @d_startdate, @d_today ) 'Suspension',
dbo.getClientEventCountAnnual(clcon.contactkey, 'C') 'MissingNotes',
-- dbo.getContactVerificationStatus(clcon.contactkey, 'D')'clverification',
-- dbo.getContactVerificationStatus(cgcon.contactkey, 'D')'cgverification',
ed1.eventkey 'mdskey',
dbo.getCnfgTableOption(54,ed1.eventstatusid,'D')'mdsstatus',
ed1.ScheduledDate 'NextMDS',
ed2.eventkey 'pockey',
dbo.getCnfgTableOption(54,ed2.eventstatusid,'D')'pocstatus',
ed2.ScheduledDate 'NextPoC',
ed3.eventkey 'hvkey',
dbo.getCnfgTableOption(54,ed3.eventstatusid,'D')'hvsstatus',
ed3.ScheduledDate 'NextHV',
ed4.eventkey 'medlistkey',
dbo.getCnfgTableOption(54,ed4.eventstatusid,'D')'medstatus',
ed4.ScheduledDate 'NextMedList',
ed5.eventkey 'semikey',
dbo.getCnfgTableOption(54,ed5.eventstatusid,'D')'semistatus',
ed5.ScheduledDate 'NextSemi',
ed6.eventkey'placementkey',
ed6.startdate'placementstart',
ed6.enddate'placementend',
[dbo].[getClientCMName](clcon.contactkey)'cmname',
[dbo].[getClientRNName](clcon.contactkey)'rnname',
[dbo].[getClientCMKey](clcon.contactkey)'cmkey',
[dbo].[getClientRNKey](clcon.contactkey)'rnkey',
alertcount=(SELECT COUNT(eventalertkey) FROM veventalert WHERE alerttype='Alert' AND clientkey=clcon.contactkey AND viewedind=0 AND contactkey=COALESCE(@i_staffcontactkey,@i_contactkey)),
alertkey=(SELECT MAX(eventalertkey) FROM veventalert WHERE alerttype='Alert' AND clientkey=clcon.contactkey AND viewedind=0 AND contactkey=COALESCE(@i_staffcontactkey,@i_contactkey)),
msgcount=(SELECT COUNT(eventalertkey) FROM veventalert WHERE alerttype='Message' AND clientkey=clcon.contactkey AND viewedind=0 AND cgkey=cgcon.contactkey),
msgkey=(SELECT MAX(eventalertkey) FROM veventalert WHERE alerttype='Message' AND clientkey=clcon.contactkey AND viewedind=0 AND cgkey=cgcon.contactkey),
clcp.birthdate
FROM (select dbo.getcontactstatus(contactkey,'ts')'Stat',* from contact where dbo.getcontactstatus(contactkey,'ts') is not null ) clcon
INNER JOIN contactrole cr
ON (clcon.contactkey = cr.contactkey)
--Find caregiver contact info
LEFT JOIN contactassociation ca on ca.contactkey2 = clcon.contactkey and ca.rolekey1 in (4,5,6)
and ca.relationshipid = 181 and ca.activeind = 1
and ca.associationkey = (select max(associationkey)
from contactassociation
where contactkey2 = clcon.contactkey and activeind = 1
and relationshipid = 181
and rolekey1 in (4,5,6))
LEFT JOIN contact cgcon
ON cgcon.contactkey = ca.contactkey1 and cgcon.activeind = 1
LEFT JOIN contactbu cbu
ON (clcon.contactkey = cbu.contactkey)
/*Account/Lvl Information*/
LEFT JOIN contactprofile clcp
ON (clcon.contactkey=clcp.contactkey)
LEFT JOIN cnfgtableoption ctlvl
ON (clcp.svclevelid = ctlvl.tableoptionkey)
LEFT JOIN cnfgtableoption ctacct
ON (clcp.accountid = ctacct.tableoptionkey)
LEFT JOIN eventdefinition ed1 /* MDS */
ON (clcon.contactkey=ed1.contactkey AND ed1.eventkey=dbo.getContactEventByWftask(clcon.contactkey, 181, 'MINOPEN'))
LEFT JOIN eventdefinition ed2 /* POC */
ON (clcon.contactkey=ed2.contactkey AND ed2.eventkey=dbo.getContactEventByWftask(clcon.contactkey, 120, 'MINOPEN'))
LEFT JOIN eventdefinition ed3 /* HV */
ON (clcon.contactkey=ed3.contactkey AND ed3.eventkey=dbo.getContactEventByWftask(clcon.contactkey, 341, 'MINOPEN'))
LEFT JOIN eventdefinition ed4 /* MED */
ON (clcon.contactkey=ed4.contactkey AND ed4.eventkey=dbo.getContactEventByWftask(clcon.contactkey, 178, 'MINOPEN'))
LEFT JOIN eventdefinition ed5 /* SEMI */
ON (clcon.contactkey=ed5.contactkey AND ed5.eventkey=dbo.getContactEventByWftask(clcon.contactkey, 122, 'MINOPEN'))
LEFT JOIN eventdefinition ed6 /* Placement */
ON (clcon.contactkey=ed6.contactkey AND ed6.wftaskkey = 49
AND ed6.eventstatusid = 16
AND ed6.activeind = 1
AND ed6.enddate = (select MAX(enddate) from eventdefinition
where contactkey = clcon.contactkey and wftaskkey = 49
and activeind = 1
and eventstatusid = 16))
WHERE
--Contact info
cr.rolekey = 8
AND cbu.entrykey = @i_entrykey
--and dbo.getcontactstatus (clcon.contactkey,'TS') not in ('Closed','Discharged')
and clcon.Stat not in ('Closed')
and clcon.activeind=1
-- filter by branch entrykey (if param exists)
--order by clcon.lastname,clcon.firstname
【问题讨论】：
【参考方案1】：当您在一个函数中使用多个语句并返回一个表时，即 表值用户定义函数，您需要某种语法，例如：
CREATE FUNCTION dbo.MyFunction(@ID int)
RETURNS @Mytable TABLE
(
-- Columns returned by the function
ID int PRIMARY KEY NOT NULL,
-- (Other columns as required)
)
AS
BEGIN
--Various statements to populate @Mytable
RETURN; -- Returns @Mytable
END
更多信息请参见Table-Valued User-Defined Functions。
如果您的函数只有 RETURNS TABLE 而没有返回表的定义，则这是一个内联用户定义函数。
内联用户定义函数是用户定义函数的子集 返回表数据类型。可以使用内联函数来实现 参数化视图的功能。
见Inline User-Defined Functions。
语法如下：
CREATE FUNCTION dbo.MyFunction(@ID int)
RETURNS TABLE
AS
RETURN
(
SELECT *
FROM MyTable
WHERE ID = @ID
);
这里不定义要返回的表，函数体只能是一个SELECT语句。
目前您的代码介于两者之间；您需要将此作为第一个选项，即表值用户定义函数；首先定义在RETURNS 子句中返回的表，然后从那里开始。
【讨论】：
【参考方案2】：您的函数声明无效。返回表格时，您应该指定将保存表格的变量名称，因此您的标题可能如下所示：
ALTER FUNCTION [dbo].[XXX](.....)
RETURNS @temp TABLE (contactkey int, contactkey1 int, rolekey1 int,contactkey2 int, rolekey2 int, relationshipid int)
AS
begin
...
【讨论】：
【参考方案3】：您需要在 RETURNS 语句中定义表的列。
【讨论】：
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