2014-10-28 65 views
1

我用过spark SQL connect hive,基本查询还行,但是无法创建索引,会不会引发SQL支持索引?Spark SQL(版本1.1.0)是否支持配置单元索引?

DROP TABLE test_tabe; 
CREATE TABLE test_tabe 
(
.... 
,area STRING 
... 
) 
ROW FORMAT DELIMITED 
FIELDS TERMINATED BY '\t' 
LINES TERMINATED BY '\n' 
STORED AS RCFILE 
--STORED AS SEQUENCEFILE 
; 
CREATE INDEX idx_compact_index ON TABLE test_tabe (area) AS 'COMPACT' WITH DEFERRED REBUILD 

#!!!!Execute always,no error,spark web page no corresponding job !!!! 
ALTER INDEX idx_compact_index ON test_tabe REBUILD; 

insert overwrite table test.test_tabe select * from test.new_mkt_browse_label_10m 

谢谢。

回答

1

spark中不支持Hive索引。它们并不重要,因为火花在内存计算中。 你有任何机会运行索引配置单元查询与类似的火花查询之间的比较? 您可以检出更多关于索引未被执行的信息here

+0

Hive vs Spark SQL vs Impala http://blog.atscale.com/how-different-sql-on-hadoop-engines-satisfy-bi-workloads – 2016-07-27 16:55:39

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