在this doc上找不到答案,重新定义特征时会调用救助子句吗? A类 class A
feature --
process
do
do_stuff
rescue
on_fail
end
end -- class B类 class B
inherit
A
redefine
process
end
feature --
process
do
do_other_stuf
我有两张桌子,一张有顾客名单,另一张有合同清单。每个客户可以有多个合同。我想要得到所有客户的姓名,以及他们是否有合同。这是我的要求:
SELECT c.[no_],
c.[name],
s.[contract no_]
FROM [contact] AS c
LEFT OUTER JOIN [service contract header] AS s
ON c.[no_] LIKE s.[contact no_]
AND s.[serv_ contra