dbCanConnect {DBI} | R Documentation |
Like dbConnect()
, but only checks validity without actually returning
a connection object. The default implementation opens a connection
and disconnects on success, but individual backends might implement
a lighter-weight check.
dbCanConnect(drv, ...)
drv |
an object that inherits from DBIDriver, or an existing DBIConnection object (in order to clone an existing connection). |
... |
authentication arguments needed by the DBMS instance; these
typically include |
A scalar logical. If FALSE
, the "reason"
attribute indicates
a reason for failure.
Other DBIDriver generics: DBIDriver-class
,
dbConnect
, dbDataType
,
dbDriver
, dbGetInfo
,
dbIsReadOnly
, dbIsValid
,
dbListConnections
# SQLite only needs a path to the database. (Here, ":memory:" is a special # path that creates an in-memory database.) Other database drivers # will require more details (like user, password, host, port, etc.) dbCanConnect(RSQLite::SQLite(), ":memory:")