Hive扩展功能(八)--表的索引

软件环境:

linux系统: CentOS6.7
Hadoop版本: 2.6.5
zookeeper版本: 3.4.8

##主机配置:
#####一共m1, m2, m3这三部机, 每部主机的用户名都为centos
```
192.168.179.201: m1
192.168.179.202: m2
192.168.179.203: m3

m1: Zookeeper, Namenode, DataNode, ResourceManager, NodeManager, Master, Worker

m2: Zookeeper, Namenode, DataNode, ResourceManager, NodeManager, Worker

m3: Zookeeper, DataNode, NodeManager, Worker

####资料

官方资料:

https://cwiki.apache.org/confluence/display/Hive/IndexDev

https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-Create/Drop/AlterIndex

---
<br>
<br>
####一. 编辑hive-site.xml文件

hive.optimize.index.filter
true

hive.optimize.index.groupby
true

hive.index.compact.file.ignore.hdfs
true

```

---

####二. 创建Hive表索引
```
官方资料:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Indexing
```

---

1.创建/构造, 显示, 删除索引:

create index table01_index on table table01 (column2) as 'compact';
show index on table01;
drop index table01_index on table01;

---

2.创建时重构, 格式化显示 (with column names), 删除索引:

create index table02_index on table table02 (column3) as 'compact' with deferred rebuild;
alter index table02_index on table2 rebuild;
show formatted index on table02;
drop index table02_index on table02;

---

3.创建索引视图, 构建, 显示, 删除:

create index table03_index on table table03 (column4) as 'bitmap' with deferred rebuild;
alter index table03_index on table03 rebuild;
show formatted index on table03;
drop index table03_index on table03;

4.在新表中创建索引:

create index table04_index on table table04 (column5) as 'compact' with deferred rebuild in table table04_index_table;

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5.创建索引以RCFile的存储格式:

create index table05_index on table table05 (column6) as 'compact' stored as RCFile;

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6.创建索引以TextFile的存储格式:

create index table06_index on table table06 (column7) as 'compact' row format delimited fields terminated by '\t' stored as textFile;

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7.创建索引和索引的属性:

create index table07_index on table table07 (column8) as 'COMPACT' idxproperties ("prop1"="value1", "prop2"="value2");

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8.创建索引和表的属性:

create index table08_index on table table08 (column9) as 'compact' tblproperties ("prop3"="value3", "prop4"="value4");

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9.索引如果存在则删除:

drop index if exists table09_index on table09;

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10.重构一个分区的数据:

alter index table10_index on table10 partition (columnX='valueQ', columnY='valueR') rebuild;

---