使用在hdfs上的檔案匯入到hive中
hive要開啟，另一邊[email protected]:/# hdfs dfs -ls /user/hive檢視hdfs上都有些什麼，
然後把資料檔案匯入到hdfs上 ，[email protected]:/# hdfs dfs -put /opt/os.txt /user/hive/
hive那邊用show databases;檢視當前都有什麼資料庫
然後建立表（此表是用來裝匯入進來的資料的）
hive> create table os
> (pathid string,nodeweight int,pathweight string,nodeid int,shutdown string)
> ROW FORMAT DELIMITED FIELDS TERMINATED BY ' ' LINES TERMINATED BY '\n'
> STORED AS TEXTFILE;
要保證建立的表的格式要和資料檔案中的格式一樣，例如欄位間的間隔符是什麼行與行間的間隔符都要進行限定，
匯入資料 hive> load data inpath '/user/hive/os.txt' into table os;
hive> select * from os;
OK
["12->22"]9638[52]12false
["19->78"]11895[51]19true
["16->17"]8608[58]16true
["16->17"]10240[54]16false
["12->22"]9638[52]12true
["2->22","2->3"]9638[52,44]2true
["19->78"]11895[51]19false
["16->17"]8608[58]16false
["16->17"]10240[54]16true
["1->65"]13271[53]1
true
["11->17","11->13"]10383[50,56]11false
["6->21","6->22","6->19","6->7","6->44","6->10","6->9","6->11"]5398[54,58,54,55,50,59,55,55]6false
["0->52","0->91","0->53"]9814[52,58,54]0true
["1->65"]13271[53]1
false
["11->17","11->13"]10383[50,56]11true
["6->21","6->22","6->19","6->7","6->44","6->10","6->9","6->11"]5398[54,58,54,55,50,59,55,55]6true
["0->52","0->91","0->53"]9814[52,58,54]0false
Time taken: 0.114 seconds, Fetched: 17 row(s)
進來了
其實我在匯入的時候下面顯示Loading data to table default.os
Failed with exception Unable to alter table. For direct MetaStore DB connections, we don't support retries at the client level.
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MoveTask
但是之後我想檢視一下表中到底有沒有資料，資料是匯入進來的，但是為什麼低下有failed那幾行我也不太清楚，如果有知道的可以告訴我，學習知識大家互相討論互相進步嘛