Hive常用語句
阿新 • • 發佈：2019-02-18
display data- -a itl ons bsp lis hive apache
文章目錄
- 1 顯示分區
- 2 添加分區
- 3 刪除分區
- 4 修改分區
- 5 添加列
- 6 修改列
- 7 修改表屬性
- 8 表的重命名
顯示分區
show partitions iteblog;
|
添加分區
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‘;
|
刪除分區
ALTER TABLE table_name DROP [IF EXISTS] PARTITION partition_spec[, PARTITION partition_spec, ...]
ALTER TABLE iteblog DROPPARTITION (dt=‘2008-08-08‘, country=‘us‘);
|
修改分區
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;
|
修改表屬性
- alter table iteblog set TBLPROPERTIES (‘EXTERNAL‘=‘TRUE‘);
- alter table iteblog set TBLPROPERTIES (‘EXTERNAL‘=‘FALSE‘);
表的重命名
ALTER TABLE iteblog RENAME TO new_table_name
|
參考：https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-AddPartitions
Hive常用語句