两者重建索引时的扫描方式不同,rebuild用的是“INDEX FAST FULL SCAN”,rebuild online用的是“TABLE ACCESS FULL”; 即rebuild index是扫描索引块,而rebuild index online是扫描全表的数据块. 测试过程 SQL> create table t1 as select * From emp; Table created SQL> CREATE INDEX i_empno on T1 (empno);...
When you rebuild index online, it will do a full table scan on the base table. At the same time it will maintain a journal table for DML data, which has changed during this index rebuilding operation. So it should take longer time, specially if you do lots of DML on the same table,...
alter INDEX SCOTT.T_P_IND REBUILD PARTITION SYS_P116;test1 #drop table test1 purge; create table t1 as select * from t; SCOTT > select a.TABLE_NAME,segment_name,bytes/1024/1024 from user_tables a,dba_segments b where a.TABLE_NAME=b.segment_name and a.table_name='T1' and owner='S...
ALTER INDEX { index_name | ALL } ON <object> { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_option> [ , ...n ] ) ] ] } | DISABLE | REORGANIZE [ PARTITION = par...
ALTER INDEX { index_name | ALL } ON <object> { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_option> [ , ...n ] ) ] ] } | DISABLE | REORGANIZE [ PARTITION = par...
ALTER INDEX { index_name | ALL } ON [ schema_name. ] table_name { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_option> ) ] ] } | DISABLE | REORGANIZE [ PARTITION = partition_number...
在Microsoft SQL Server 2008、SQL Server 2012 或 SQL Server 2014 中,在聚集索引表的索引维护期间使用 ALTER INDEX REBUILD 语句。 执行此操作时,聚集索引表的占用时间可能比预期重建时间长。 原因 如果聚集索引表包含文件流数据,则会出现此问题。 重建聚集索引表时,将对文件流数据执行不必要的复制...
Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by setting options on the index.
Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by setting options on the index.
ALTER INDEX { index_name | ALL } ON [ schema_name. ] table_name { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_option> ) ] ] } | DISABLE | REORGANIZE [ PARTITION = partition_number...