參考?https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-AlterTable%2FPartitionStatements

這里主要列一些常用操作。

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添加分區

ALTER TABLE table_name ADD PARTITION (partCol = 'value1') location 'loc1'; //示例 ALTER TABLE table_name ADD IF NOT EXISTS PARTITION (dt='20130101') LOCATION '/user/hadoop/warehouse/table_name/dt=20130101'; //一次添加一個分區ALTER TABLE page_view 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'; //一次添加多個分區

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刪除分區

ALTER TABLE login DROP IF EXISTS PARTITION (dt='2008-08-08');ALTER TABLE page_view DROP IF EXISTS PARTITION (dt='2008-08-08', country='us');

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修改分區

ALTER TABLE table_name PARTITION (dt='2008-08-08') SET LOCATION "new location"; ALTER TABLE table_name PARTITION (dt='2008-08-08') RENAME TO PARTITION (dt='20080808');

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添加列

ALTER TABLE table_name ADD COLUMNS (col_name STRING); //在所有存在的列后面，但是在分區列之前添加一列

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修改列

CREATE TABLE test_change (a int, b int, c int);// will change column a's name to a1 ALTER TABLE test_change 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 test_change 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 test_change CHANGE b b1 INT FIRST;

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修改表屬性:

alter table table_name set TBLPROPERTIES ('EXTERNAL'='TRUE'); //內部表轉外部表 alter table table_name set TBLPROPERTIES ('EXTERNAL'='FALSE'); //外部表轉內部表

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表的重命名

ALTER TABLE table_name RENAME TO new_table_name

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總結

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