索引分析后index_stats里没数据？

SQL>  analyze index inp.index_name validate structure online; Index analyzed.    SQL>  select * from index_stats   2  ; no rows selected    解释如下，要用DBMS_STATS包来分析，另外不加online是会有分析数据的     Analyze Index Validate Structure Online Does Note Populate INDEX_STATS (文档 ID 283974.1)

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In this Document Symptoms Cause Solution Applies to: Oracle Database - Enterprise Edition - Version 9.2.0.1 to 11.2.0.3 [Release 9.2 to 11.2] Information in this document applies to any platform. ***Checked for relevance on 27-Jan-2012*** Symptoms A sql command 'analyze index validate structure online' does not populate index_stats or index_histogram while without the online clause it does populate the views. Testcase SQL> create table test (id number, text varchar2(9)); SQL> create index test_indx on test(id); SQL> insert into test values (1, 'A'); SQL> insert into test values (2, 'B'); SQL> insert into test values (3, 'C'); SQL> commit; SQL> analyze index test_indx validate structure online; Index analyzed. SQL> select * from index_stats; no rows selected SQL> select * from index_histogram; no rows selected SQL> analyze index test_indx validate structure ; Index analyzed. SQL> select * from index_stats; HEIGHT         BLOCKS NAME ---------- ---------- ------------------------------ PARTITION_NAME                 LF_ROWS    LF_BLKS    LF_ROWS_LEN LF_BLK_LEN ------------------------------ ---------- ---------- ----------- ----------    BR_ROWS    BR_BLKS BR_ROWS_LEN BR_BLK_LEN DEL_LF_ROWS DEL_LF_ROWS_LEN ---------- ---------- ----------- ---------- ----------- --------------- DISTINCT_KEYS MOST_REPEATED_KEY BTREE_SPACE USED_SPACE   PCT_USED ROWS_PER_KEY ------------- ----------------- ----------- ---------- ---------- ------------ BLKS_GETS_PER_ACCESS PRE_ROWS   PRE_ROWS_LEN OPT_CMPR_COUNT OPT_CMPR_PCTSAVE -------------------- ---------- ------------ -------------- ---------------- 1                   8 TEST_INDX                                         3          1          42       7996          0          0           0          0           0               0             3                 1        7996         42          1            1