ident() takes unquoted strings and flags them as identifiers.
ident_q() assumes its input has already been quoted, and ensures
it does not get quoted again. This is currently used only for
for schema.table.
# NOT RUN {# SQL92 quotes strings with 'escape("x")
# And identifiers with "ident("x")
escape(ident("x"))
# You can supply multiple inputsident(a = "x", b = "y")
ident_q(a = "x", b = "y")
# }