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.
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
A scalar logical. If
"reason" attribute indicates
a reason for failure.
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# 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:")
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