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您需要什么权限才能直接查询 sys.obj$、sys.col$ 等系统表?
对于 Oracle 9i 或更高版本,SELECT_ANY_DICTIONARY 特权。
对于早期版本,我认为您需要 SELECT_ANY_TABLE,并且还需要 07_DICTIONARY_ACCESSIBILITY = TRUE,但这是不安全的。