DQL 外连接问题答案

【问题标题】：Issue with DQL outer joinDQL 外连接问题
【发布时间】：2014-02-20 20:10:24
【问题描述】：

这是我的查询：

SELECT r.pLastName, r.pFirstName, r.ppLocation, a.createdDate, a.appointmentDate, a.hour, a.minute, a.ampm, p.firstName, p.lastName, a.reason, pl.firstName as oncologyPhysicianFirstName, pl.lastName as oncologyPhysicianLastName
FROM MainReferralCaptureBundle:Appointment a, MainReferralCaptureBundle:Referral r, MainReferralCaptureBundle:Physician p
RIGHT OUTER JOIN MainReferralCaptureBundle:PhysicansLocations pl WITH pl.physicansLocationsId = r.ppName
WHERE a.referralId = r.id
AND r.submittedBy = :user
AND r.rpId = p.id
ORDER BY a.appointmentDate DESC

我收到以下错误：

QueryException: [Syntax Error] line 0, col 366: Error: Expected end of string, got 'RIGHT'

如果我这样做：

SELECT r.pLastName, r.pFirstName, r.ppLocation, a.createdDate, a.appointmentDate, a.hour, a.minute, a.ampm, p.firstName, p.lastName, a.reason, pl.firstName as oncologyPhysicianFirstName, pl.lastName as oncologyPhysicianLastName
        FROM MainReferralCaptureBundle:Appointment a, MainReferralCaptureBundle:Referral r, MainReferralCaptureBundle:Physician p
        LEFT OUTER JOIN MainReferralCaptureBundle:PhysicansLocations pl WITH pl.physicansLocationsId = r.ppName
        WHERE a.referralId = r.id
        AND r.submittedBy = :user
        AND r.rpId = p.id
        ORDER BY a.appointmentDate DESC

我明白了：

ORA-00904: "R0_"."PP_NAME": invalid identifier

我不确定发生了什么。 ppName 是一个有效的标识符。请注意，我使用 Oracle 作为后端。

【问题讨论】：

标签： php sql symfony doctrine dql

【解决方案1】：

发现我必须更改 FROM 子句中的顺序：

FROM MainReferralCaptureBundle:Appointment a, MainReferralCaptureBundle:Physician p, MainReferralCaptureBundle:Referral r

现在一切正常。

【讨论】：