tdh inceptor orc分区表和hdfs上表目录内文件的关系（值分区，范围分区）。

drop table if exists user7;
drop table if exists user7_0;
drop table if exists user7_1;
create table user7 (name string ,age int)partitioned by (sex string) stored as orc; 
set hive.exec.dynamic.partition=true; 
insert into table user7 partition(sex) select 'zs',1,'girl' from system.dual;

 create table user7_0 (name string ,age int ,sex string)stored as orc;

load data inpath '/inceptorsql1/user/hive/warehouse/default.db/hive/user7/sex=girl' into table user7_0;

insert into table user7 partition(sex) select 'zs',1,'girl' from system.dual;

 create table user7_1 (name string ,age int) stored as orc;
 load data inpath '/inceptorsql1/user/hive/warehouse/default.db/hive/user7/sex=girl' into table user7_1;

select * from user7_0;
select * from user7_1;

 

 这个实验，演示了分区表和非分区表的关系。值分区表的orc文件不保存分区列的值。

下面试着演示范围分区：

create table  user9(name string) partitioned by range (age int) 
(
PARTITION p5_105_205 VALUES LESS THAN (5),
PARTITION p5_105_215 VALUES LESS THAN (10),
PARTITION p5_115_205 VALUES LESS THAN (20),
PARTITION p5_115_max VALUES LESS THAN (MAXVALUE)
)stored as orc;

insert into user9 select name,age from user4;
dfs -ls /inceptorsql1/user/hive/warehouse/default.db/hive/user9/p5_105_215;

create table user9_0(name string,age int) stored as orc;

load data inpath '/inceptorsql1/user/hive/warehouse/default.db/hive/user9/p5_105_215/000000_0' into table user9_0;

用dfs -ls 找出有数据的目录，然后将数据load到对应非分区表user9_0中。

结果如下，说明范围分区表中的orc文件有和对应非分区表相同数量的列。