Hive常用语句

文章目录

• 1 显示分区
• 2 添加分区
• 3 删除分区
• 4 修改分区
• 5 添加列
• 6 修改列
• 7 修改表属性
• 8 表的重命名

显示分区

show partitions iteblog;

添加分区

ALTER TABLE table_name ADD [IF NOT EXISTS] PARTITION partition_spec

  [LOCATION 'location1'] partition_spec [LOCATION 'location2'] ...;

  

partition_spec:

  : (partition_column = partition_col_value, partition_column = partition_col_value, ...)

 

 

ALTER TABLE iteblog ADD PARTITION (dt='2008-08-08') location '/path/to/us/part080808';

ALTER TABLE iteblog ADD PARTITION (dt='2008-08-08', country='us') location '/path/to/us/part080808';

ALTER TABLE iteblog ADD PARTITION (dt='2008-08-08', country='us') location '/path/to/us/part080808'

                        PARTITION (dt='2008-08-09', country='us') location '/path/to/us/part080809';

删除分区

ALTER TABLE table_name DROP [IF EXISTS] PARTITION partition_spec[, PARTITION partition_spec, ...]

 

ALTER TABLE iteblog DROP PARTITION (dt='2008-08-08', country='us');

修改分区

ALTER TABLE iteblog PARTITION (dt='2008-08-08') SET LOCATION "new location";

ALTER TABLE iteblog PARTITION (dt='2008-08-08') RENAME TO PARTITION (dt='20080808');

添加列

ALTER TABLE iteblog ADD COLUMNS (col_name STRING);

修改列

CREATE TABLE iteblog (a int, b int, c int);

 

// will change column a's name to a1

ALTER TABLE iteblog CHANGE a a1 INT;

 

// will change column a's name to a1, a's data type to string, and put it after column b. The new table's structure is: b int, a1 string, c int

ALTER TABLE iteblog CHANGE a a1 STRING AFTER b;

 

// will change column b's name to b1, and put it as the first column. The new table's structure is: b1 int, a string, c int

ALTER TABLE iteblog CHANGE b b1 INT FIRST;

修改表属性

1. alter table iteblog set TBLPROPERTIES ('EXTERNAL'='TRUE');
2. alter table iteblog set TBLPROPERTIES ('EXTERNAL'='FALSE');

表的重命名

ALTER TABLE iteblog RENAME TO new_table_name

参考：https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-AddPartitions