Question

我在Hive（0.9.0）表中的多个列上构建索引时遇到问题。

describe nas_comps;
OK
leg_id  int
ds_name string
dep_date        string
crr_code        string
flight_no       string
orgn    string
dstn    string
physical_cap    int
adjusted_cap    int
closed_cap      int
comp_code       string

这有效：

CREATE INDEX nas_comps_legid ON TABLE nas_comps (leg_id) AS 'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler' WITH DEFERRED REBUILD;

但这并不是：

    CREATE INDEX nas_comps_legid_compcode ON TABLE nas_comps (leg_id,comp_code) AS 'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler' WITH DEFERRED REBUILD;

FAILED: Error in metadata: java.lang.RuntimeException: Check the index columns, they should appear in the table being indexed.
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask

我猜索引只能识别第一列，因为即使失败了：

CREATE INDEX nas_comps_compcode ON TABLE nas_comps (comp_code) AS 'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler' WITH DEFERRED REBUILD;

FAILED: Error in metadata: java.lang.RuntimeException: Check the index columns, they should appear in the table being indexed.
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask

我检查了this问题，但我不认为这是原因。

Answer 1

Think Hive不支持对分区列进行索引..请检查comp代码是否为分区列。

就多列索引而言，它应该有效..

Answer 2

CREATE INDEX nas_comps_legid ON TABLE nas_comps（leg_id）AS'org.apache.hadoop.hive.ql.index.compact.CompactIndexHandler'with DEFERRED REBUILD;

或

CREATE INDEX nas_comps_legid ON TABLE nas_comps（leg_id）AS'compact'with DEFERRED REBUILD;

是的，这是有效的

Hive索引错误

2 个答案: