HBase（2）-操作命令DDL
创建表 create
指令格式：create 表名，列簇1，....，列簇n
hbase(main):010:0> create 'tbTest','col-familyA','col-familyB'
0 row(s) in 2.4910 seconds
create 't1', 'f1', SPLITS => ['10', '20', '30', '40']
create 't1', {NAME =>'f1', TTL => 180}, SPLITS => ['10', '20', '30', '40']
create 't1', {NAME =>'f1', TTL => 180}, {NAME => 'f2', TTL => 240}, SPLITS => ['10', '20', '30', '40']查询表 list
hbase(main):011:0> list
TABLE
t1
tbTest
2 row(s) in 0.0040 seconds
=> ["t1", "tbTest"]表描述 describe
指令格式： describe 表名
hbase(main):015:0> describe 't1'
Table t1 is ENABLED
t1
COLUMN FAMILIES DESCRIPTION
{NAME => 'f1', BLOOMFILTER => 'ROW', VERSIONS => '2', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACH
E => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}
{NAME => 'f2', BLOOMFILTER => 'ROW', VERSIONS => '2', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCACH
E => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}
2 row(s) in 0.0780 seconds禁用表 disable
指令格式： disable 表名
hbase(main):016:0> disable 't1'
0 row(s) in 4.4590 seconds删除表 drop （删除表要先禁用(disable)表）
指令格式： drop 表名
hbase(main):017:0> describe 't1'
Table t1 is DISABLED
2 row(s) in 0.0480 seconds
hbase(main):018:0> drop 't1'
0 row(s) in 2.3840 seconds
启用表 enable
指令格式： enable 表名
hbase(main):020:0> disable 'tbTest'
0 row(s) in 2.3030 seconds
hbase(main):022:0> enable 'tbTest'
0 row(s) in 2.3820 seconds验证已经启用表
指令格式： is_enabled 表名
hbase(main):023:0> is_enabled 'tbTest'
true验证已经禁用表
指令格式： is_disabled 表名
hbase(main):024:0> is_disabled 'tbTest'
false验证表存在 exists
指令格式： exists 表名
hbase(main):029:0> exists 'tbTest'
Table tbTest does exist修改表 alter （修改前要先禁用表）
指令格式： alter 表名，指令1，......，指令m
模版
There could be more than one alteration in one command:
hbase> alter 't1', { NAME => 'f1', VERSIONS => 3 },
{ MAX_FILESIZE => '134217728' }, { METHOD => 'delete', NAME => 'f2' },
OWNER => 'johndoe', METADATA => { 'mykey' => 'myvalue' }增加列
hbase(main):040:0> alter 'tbTest',NAME => 'col-familyC'
Updating all regions with the new schema...
1/1 regions updated.
Done.
0 row(s) in 2.5760 seconds删除列
hbase(main):003:0> alter 'tbTest',{NAME=>'col-familyC',METHOD=>'delete'}
Updating all regions with the new schema...
1/1 regions updated.
Done.
0 row(s) in 3.0540 seconds清空表数据 truncate （清空前表要启用）
指令格式： truncate 表名
hbase(main):007:0> enable 'tbTest'
0 row(s) in 2.3410 seconds
hbase(main):008:0> truncate 'tbTest'
Truncating 'tbTest' table (it may take a while):
- Disabling table...
- Truncating table...
0 row(s) in 5.0260 seconds删除匹配表 drop_all （删除表前要禁用表）
指令格式： drop_all 正则表达式
hbase(main):012:0> list
TABLE
t1
t2
tbTest
3 row(s) in 0.0310 seconds
=> ["t1", "t2", "tbTest"]
hbase(main):013:0> drop_all 't[0-9]'
t1
t2
Drop the above 2 tables (y/n)?
y