This function calls the jvm_ref_import() function to produce the XML, then transforms it to a set of DROP TYPE statements and executes them.
SQL> import_jar (null, vector ('java.lang.System')); Done. -- 126 msec. SQL> select java_lang_System::getProperty('java.vm.name'); callret NVARCHAR _______________________________________________________________________________ Java HotSpot(TM) Client VM SQL> unimport_jar (null, vector ('java.lang.System')); Done. -- 54 msec. SQL> select java_lang_System::getProperty('java.vm.name'); *** Error 37000: [Virtuoso Driver][Virtuoso Server]UD041: No user defined type DB.DBA.java_lang_System at line 8 of Top-Level: select java_lang_System::getProperty('java.vm.name')