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Tag Archives: skip_unusable_indexes
10g新增初始化参数SKIP_UNUSABLE_INDEXES
这个10.1就增加的新特性,是最近才发现的。 公司中的新人问起索引失效对表影响,于是随手做了个例子,才发现10g中已经改变了9i中的默认方式: SQL> CREATE TABLE t_index (id NUMBER, name varchar2(30)); TABLE created. SQL> CREATE INDEX ind_t_id ON t_index(id); INDEX created. SQL> CREATE INDEX ind_t_name ON t_index(name); INDEX created. SQL> INSERT INTO t_index VALUES (1, ‘a’); 1 ROW created. SQL> commit; … Continue reading