Null, or a tibble with 1 row per identified connection and the
following fields:
- name
identifier (character)
description
a description of the connection, if found in the conf
file (character)
live
is this connection valid and live? (logical)
driver
the name of the driver function (character)
conn_str
the string used to parameterize the connection (character)
pool
is this a pool connection? (logical)
If no connection names matched name_str
, the tibble will be empty. If no
connections have been configured (e.g. connect()
has not been called),
NULL
is returned.