“create a dummy table and then write insert into table select from table2 kind
of dummy query”
I’ve not been using Hadoop for too long but I was kinda surprised that there
was no equivalent of Oracle’s [DUAL] table in Hive. It would be useful for
testing expressions in the SELECT clause or
The Hive wiki describes the SELECT syntax here
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Select#LanguageManualSelect-SelectSyntax
.
-- Lefty
On Thu, Jun 19, 2014 at 9:52 AM, Nitin Pawar nitinpawar...@gmail.com
wrote:
Please take a look at hive's query language support.
hive variables are not replaced on mapreduce jobs but when the query is
constructed with the variable.
if you are running two difference hivesessions, the variables will not be
mixed.
If you are setting variables with same name in same hive session then the
last set value will be picked
On
Any clue for resolving this?
[root@dc-bigdata7 bin]# /usr/lib/hive/bin/schematool -dbType mysql
-upgradeSchemaFrom 0.12.0
14/06/20 10:50:25 INFO Configuration.deprecation: mapred.reduce.tasks is
deprecated. Instead, use mapreduce.job.reduces
14/06/20 10:50:25 INFO Configuration.deprecation:
Hi,
I'm very, very new to Hadoop, Hive, etc. and I have to import data into
hive tables.
Environment: Amazon EMR, S3, etc.
The input file is on S3 and I copied it into my HDFS: hadoop distcp
s3n://mdmp-api-dump/1403181319.json hdfs:///input-api
*Example:*
Hi Chris,
Try this Serde https://github.com/rcongiu/Hive-JSON-Serde, I looked at 6
of them a while back and this one was the best, including dealing with
nested JSON structures:
https://github.com/rcongiu/Hive-JSON-Serde
- Douglas
Hey Douglas,
thanks a lot.
That's what I've tried - but it didn't work for me.
I've created table with ROW FORMAT one of the SerDe and an array which
looked like the array in the json file.
I've also added the jar to my hive session with ADD JAR...
Loading data into that table with the array
