Question

我想将数据插入到hive表中。

1）创建数据库。

2）在特定数据库中创建表。

3）在特定位置创建一个虚拟表。

4）使用虚拟表将数据插入主表。

当我插入数据进程完成而无异常但数据未插入表中时。

hive> create database final;

行所用时间：2.56秒

hive> create table final.abc (user_name string, password string)
> ROW FORMAT DELIMITED   
> FIELDS TERMINATED BY ',' 
> LINES TERMINATED BY '\n'
> STORED AS TEXTFILE;

行所用时间：0.591秒

hive> create table foo (user string , password string)          
> ROW FORMAT DELIMITED   
> FIELDS TERMINATED BY ',' 
> LINES TERMINATED BY '\n'
> STORED AS TEXTFILE
> Location '/usr/hive/hive-0.10.0/fiels';

行所用时间：0.051秒

hive> insert into table final.abc select 'username','password' from foo;

Total MapReduce jobs = 3
Launching Job 1 out of 3
Number of reduce tasks is set to 0 since there's no reduce operator
Starting Job = job_201306191046_0002, Tracking URL =/jobdetails.jsp?jobid=job_201306191046_0002
Kill Command = /usr/hadoop/hadoop-1.1.2/libexec/../bin/hadoop job  -kill job_201306191046_0002
Hadoop job information for Stage-1: number of mappers: 0; number of reducers: 0
2013-06-19 12:04:36,870 Stage-1 map = 0%,  reduce = 0%
2013-06-19 12:04:37,878 Stage-1 map = 100%,  reduce = 100%
Ended Job = job_201306191046_0002
Ended Job = -331805541, job is filtered out (removed at runtime).
Ended Job = -1750065493, job is filtered out (removed at runtime).
Moving data to: hdfs://localhost:9000/tmp/hive-root/hive_2013-06-19_12-04-32_830_4819535129373917658/-ext-10000
Loading data to table final.abc
Table final.abc stats: [num_partitions: 0, num_files: 0, num_rows: 0, total_size: 0, raw_data_size: 0]

MapReduce Jobs Launched: 
Job 0:  HDFS Read: 0 HDFS Write: 0 SUCCESS
Total MapReduce CPU Time Spent: 0 msec
OK
Time taken: 5.475 seconds

如有任何想法请建议我。我哪里错了。

Answer 1

select 'username','password' from foo

上面的命令应显示至少一行，然后才能将数据插入新表中。

然后将一些示例数据文件上传到/usr/hive/hive-0.10.0/fiels，以便您的查询有效。

使用以下数据创建示例文件

username,password

将该文件上传到hadoop集群

hadoop fs -put filename /usr/hive/hive-0.10.0/fiels

数据插入到hive表中

1 个答案: