I have a bunch of lines (type 2002) - some are crossing, some are "somewhere", some where touching another line somewhere, - and some are the continuation of another line. So I have to find every line (exactly: every pair of lines) where its end (or beginning) is exactly the end (or beginning) of another line.

So I think I have to check every line against every other line with ...? SDO_UTIL.CONCAT_LINES? Nearest neighbourhood?

Thanks for a hint to the right direction!