dbObjectId-class(RPostgreSQL)
dbObjectId-class()所属R语言包:RPostgreSQL
Class dbObjectId
类dbObjectId
译者:生物统计家园网 机器人LoveR
描述----------Description----------
A helper (mixin) class to provide external references in an R/S-Plus portable way.
R / S-PLUS可移植的方式提供外部引用的一个辅助类(混入)。
类对象----------Objects from the Class----------
A virtual Class: No objects may be created from it.
可能会从它创建一个虚拟类:没有对象。
插槽----------Slots----------
Id: Object of class "integer" this is an integer vector holding an opaque reference into a C struct (may or may not be a C pointer, may or may not have length one).
Id:类的对象"integer"“”这是一个不透明的参考整数向量成一个C结构(可能会或可能不会是一个C指针,可能会或可能不会有长度1)。
方法----------Methods----------
coerce signature(from = "dbObjectId", to = "integer"): ...
要挟signature(from = "dbObjectId", to = "integer"):...
coerce signature(from = "dbObjectId", to = "numeric"): ...
要挟signature(from = "dbObjectId", to = "numeric"):...
coerce signature(from = "dbObjectId", to = "character"): ...
要挟signature(from = "dbObjectId", to = "character"):...
format signature(x = "dbObjectId"): ...
格式“signature(x = "dbObjectId"):...
print signature(x = "dbObjectId"): ...
打印signature(x = "dbObjectId"):...
show signature(object = "dbObjectId"): ...
显示signature(object = "dbObjectId"):...
注意----------Note----------
A cleaner mechanism would use external references, but
一个清洁的机制,使用外部引用,但
实例----------Examples----------
pg <- dbDriver("PostgreSQL")
con <- dbConnect(pg, "user", "password")
is(pg, "dbObjectId") ## True[#真]
is(con, "dbObjectId") ## True[#真]
isPostgresqlIdCurrent(con) ## True[#真]
q("yes")
\$ R
isPostgresqlIdCurrent(con) ## False[#FALSE]
## End(Not run)[#(不执行)]
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注:
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