Nothing
.onAttach <- function(libname, pkgname) {
drv <- getOption("sqldf.driver")
drv <- if (is.null(drv) || drv == "") {
if ("package:RPostgreSQL" %in% search()) {
"PostgreSQL"
} else if ("package:RpgSQL" %in% search()) {
"pgSQL"
} else if ("package:RMySQL" %in% search()) {
"MySQL"
} else if ("package:RH2" %in% search()) {
"H2"
} else "SQLite"
} else if (!tolower(drv) %in% c("pgsql", "mysql", "h2")) {
"SQLite"
}
if (drv != "SQLite") {
msg <- paste("sqldf will default to using", drv)
packageStartupMessage(msg)
} else {
loadNamespace("RSQLite")
}
}
# .onUnload <- function(libpath) {}
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