--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TxDb.Hsapiens.UCSC.hg19.knownGene/R/zzz.R	Thu Feb 09 16:24:15 2017 -0500
@@ -0,0 +1,17 @@
+###
+### Load any db objects whenever the package is loaded.
+###
+
+.onLoad <- function(libname, pkgname)
+{
+  ns <- asNamespace(pkgname)
+  path <- system.file("extdata", package=pkgname, lib.loc=libname)
+  files <- dir(path)
+  for(i in seq_len(length(files))){
+    db <- loadDb(system.file("extdata", files[[i]], package=pkgname, 
+                  lib.loc=libname),packageName=pkgname)
+    objname <- sub(".sqlite$","",files[[i]])
+    assign(objname, db, envir=ns)
+    namespaceExport(ns, objname)
+  }
+}