Hive View and Indexes
Creating a View
CREATE VIEW [IF NOT EXISTS] view_name [(column_name [COMMENT column_comment], ...) ]
[COMMENT table_comment]
AS SELECT ...
Example
hive> CREATE VIEW emp_30000 AS
SELECT * FROM employee
WHERE salary>30000;
Dropping a View
DROP VIEW view_name
hive> DROP VIEW emp_30000;
Creating an Index
CREATE INDEX index_name
ON TABLE base_table_name (col_name, ...)
AS 'index.handler.class.name'
[WITH DEFERRED REBUILD]
[IDXPROPERTIES (property_name=property_value, ...)]
[IN TABLE index_table_name]
[PARTITIONED BY (col_name, ...)]
[
[ ROW FORMAT ...] STORED AS ...
| STORED BY ...
]
[LOCATION hdfs_path]
[TBLPROPERTIES (...)]
Example
hive> CREATE INDEX inedx_salary ON TABLE employee(salary)
AS 'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler'
WITH DEFERRED REBUILD;
Dropping an Index
DROP INDEX <index_name> ON <table_name>
hive> DROP INDEX index_salary ON employee;