“Orphaned” LOB Segments

October 31, 2014

Recently, after doing reorganization in Oracle DB, I came upon a LOB segment that does not link to a LOB.
That is, there was an entry in USER_SEGMENTS and USER_OBJECTS, but there was no entry in USER_TABLES, USER_LOBS and USER_INDEXES.
It turned out that the in the recycle bin (USER_RECYCLEBIN).  It appears that the DROP command did not “remove” all references to the dropped object.
The moral of the story is that if something is missing, look for it in the trash (the recycle bin, that is). Some things never change…