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
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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')