我需要按日期对表进行分区,然后这个分区需要由userid进行子分区。我有如下所示的分区表:PARTITION p20161130 VALUESto_days('2016-11-30')),
PARTITION p20161201 VALUES LESS THAN (to_days('2016-12-01
正在尝试对未分区的表进行分区+子分区:-
ALTERTABLE t1 modify partition by list (client_fk) SUBPARTITION BY RANGE (created_on) INTERVAL(1,‘MONTH’) (partition p0 values (0) (子分区yyyy值小于(to_Date('01/01/2010',‘dd/mm/yyyy’
Impala允许动态添加分区,如下所示。,part_col3 from table2 where 因此,它将添加多个分区,这取决于select query.But的结果,当涉及到删除分区时,似乎不是等价的。您必须显式指定要删除的分区。altertabletable1 drop
partition(part_col1="A"
如何使用FOR QUERY HIGH和PCTFREE选项压缩分区中的几个子分区altertabletable_name move subpartition subpartition_namePCTFREE 10 compress for query high; ORA-14160:this physical attribute may not be specifiedfor a