How do you store the results of Hive query in a variable in a shell script?

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How do you store the results of Hive query in a variable in a shell script?

./hive -e “use telecom;insert overwrite local directory ‘/tmp/result’ select avg(a) from abc;” ./hive –hiveconf MY_VAR =`cat /tmp/result/000000_0`;

Can I run Hive queries from shell script?

Yes, You can execute Hive queries from Shell script. You can execute Hive query from Shell by two different ways. a) Using “hive -e “Select * from employee;”” you can execute query from your Shell script. It would simply login to the hive and execute the query mentioned after -e parameter and display the result.

Can Hive queries be executed from script file how?

To write the Hive Script the file should be saved with . Open a terminal in your Cloudera CDH4 distribution and give the following command to create a Hive Script. Command: sudo gedit sample.sql. On executing the above command, it will open the file with the list of all the Hive commands that need to be executed.

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How do I save a Hive script?

Similar to any other query language, the Hive script file should be saved with . sql extension. This will enable the execution of the commands. Now open the file in Edit mode and write your Hive commands that will be executed using this script.

How do I run a query in Hive?

Running a Hive Query

  1. Step 1: Explore Tables. Navigate to the Analyze page from the top menu.
  2. Step 2: View Sample Rows. Now, execute a simple query against this table by entering the following text in the query box:
  3. Step 3: Analyze Data.

How do I run a shell command in Hive?

3 Answers. using ! – Executes a shell command from the Hive shell.

How do I run a query in hive?

How do I run the hive shell?

Launch PuTTY

  1. start Hive Shell and wait for a successful start.
  2. open the result of the command.
  3. copy session name Hive Shell.
  4. launch PuTTY, open the previously saved Hive Shell profile and, using the right mouse button, insert the saved session name as the user name and hit Enter.
  5. that’s it! Pretty simple, isn’t it?
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How do I run a shell script in Hadoop?

There are 3 ways.

  1. hadoop fs -cat /tmp/test.sh|exec sh.
  2. You can install HDP NFS and mount the hdfs directory on local file system from where you can execute your script.
  3. You can write an oozie shell workflow and call your .

What is stored as textfile in Hive?

TEXTFILE format is a famous input/output format used in Hadoop. In Hive if we define a table as TEXTFILE it can load data of from CSV (Comma Separated Values), delimited by Tabs, Spaces, and JSON data. By default, if we use TEXTFILE format then each line is considered as a record.