Reads a GPX file from path and creates several tables
prefixed by tableName representing the file’s contents. If deleteTables is equal to true, existing tables (with the same prefix) are removed.
Tables are produced depending on the content of the GPX file,
and may include:
TABLENAME_WAYPOINT
TABLENAME_ROUTE
TABLENAME_ROUTEPOINT
TABLENAME_TRACK
TABLENAME_TRACKPOINT
TABLENAME_TRACKSEGMENT
By default, the tableName is the filename given in path without
the extension.