因此空间索引的分析不能采用analyze的方式，必须采用dbms_stats包的过程进行分析才有效果。
user_indexes该视图中的last_analyzed来源于sys.ind$中的analyzetime。
空间索引的分析：采用的空间索引为INDEX_I_EXCH_S_SPATIAL

1）查询索引最近一次分析的时间
select a.index_name,a.last_analyzed from user_indexes a where index_name='INDEX_I_EXCH_S_SPATIAL';
INDEX_NAME                     LAST_ANALYZED
------------------------------ -----------------
INDEX_I_EXCH_S_SPATIAL         2011-8-11 13:10:11

2）执行ANALYZE分析
ANALYZE INDEX index_i_exch_s_spatial COMPUTE STATISTICS;

 3）再次查询最近一次分析时间

select a.index_name,a.last_analyzed from user_indexes a where index_name='INDEX_I_EXCH_S_SPATIAL';
INDEX_NAME                     LAST_ANALYZED
------------------------------ -----------------
INDEX_I_EXCH_S_SPATIAL         2011-8-11 13:10:11

4）执行如下分析后，分析时间发生改变：
BEGIN dbms_stats.gather_index_stats('ltwebgis','INDEX_I_EXCH_S_SPATIAL'); END;
select a.index_name,a.last_analyzed from user_indexes a where index_name='INDEX_I_EXCH_S_SPATIAL';
INDEX_NAME                     LAST_ANALYZED
------------------------------ -----------------
INDEX_I_EXCH_S_SPATIAL         2011-8-11 13:15:33

一般索引的分析：采用的索引为IDX_I_EXCH_S_FID
1）查询索引最近一次分析的时间
select a.index_name,a.last_analyzed from user_indexes a where index_name='IDX_I_EXCH_S_FID';
INDEX_NAME                     LAST_ANALYZED
------------------------------ -----------------
INDEX_I_EXCH_S_SPATIAL         2011-8-11 13:08:55

2）执行ANALYZE分析
ANALYZE INDEX idx_i_exch_s_fid COMPUTE STATISTICS;

 3）再查询最近分析时间

select a.index_name,a.last_analyzed from user_indexes a where index_name='IDX_I_EXCH_S_FID';
INDEX_NAME                     LAST_ANALYZED
------------------------------ -----------------
INDEX_I_EXCH_S_SPATIAL         2011-8-11 13:19:14

4）执行如下分析后，分析时间也发生改变：
BEGIN dbms_stats.gather_index_stats('ltwebgis','IDX_I_EXCH_S_FID'); END;
select a.index_name,a.last_analyzed from user_indexes a where index_name='IDX_I_EXCH_S_FID';
INDEX_NAME                     LAST_ANALYZED
------------------------------ -----------------
INDEX_I_EXCH_S_SPATIAL         2011-8-11 13:19:53

查询最近一次重建的时间
select object_name,last_ddl_time from user_objects where object_type='INDEX' AND object_name='INDEX_I_EXCH_S_SPATIAL';
OBJECT_NAME                LAST_DDL_TIME
-----------------------   ----------------
INDEX_I_EXCH_S_SPATIAL     2011-8-1 16:26:11

对该索引重建后，last_ddl_time时间发生变化
ALTER INDEX INDEX_I_EXCH_S_SPATIAL REBUILD;
select object_name,last_ddl_time from user_objects where object_type='INDEX' AND object_name='INDEX_I_EXCH_S_SPATIAL';
OBJECT_NAME                LAST_DDL_TIME
-----------------------   ----------------
INDEX_I_EXCH_S_SPATIAL     2011-8-11 10:50:45