How will you store select query results in variable in hive?

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

How do you use variables in Impala?

Variable Substitution in impala-shell

You specify the variable and its value as below. On the command line, you specify the option –var= variable_name = value.
Use the above variable in SQL statements in the impala-shell session using the notation: ${VAR: variable_name } .

How do you run a query in a Chevy Impala?

To run one or several statements in non-interactive mode: Invoke impala-shell with the -q option to run a single statement, or the -f option to run a sequence of statements from a file. The impala-shell command returns immediately, without going into the interactive interpreter.

Where does Hive store query results?

To directly save the file in HDFS, use the below command: hive> insert overwrite directory ‘/user/cloudera/Sample’ row format delimited fields terminated by ‘\t’ stored as textfile select * from table where id >100; This will put the contents in the folder /user/cloudera/Sample in HDFS.

How do I pass a variable in Hive?

Hive command to pass the value to the variable and execute the queries. Here we are passing the value “Banking_Db” to the variable database using the –hivevar option and -f is used the execute the hive queries that are present inside the file.

How do you pass variables in Impala?

You can make use of the –var=variable_name option in the impala-shell command line option to pass the value. And refer that variable inside SQL script by using statement like ${var:variable_name}. The Impala will resolve the variable in run-time and execute the script by passing actual value.

How do I declare a variable in hive?

Hive also supports setting a variable from the command line when starting a Hive CLI or beeline. You can refer this variable in Hive CLI. 0: jdbc:hive2://127.0.0.1:10000>SELECT & FROM ${hivevar:table}; You can also call test.

Which tools can you use to run Impala queries?

You can use the Impala shell tool ( impala-shell ) to set up databases and tables, insert data, and issue queries. For ad hoc queries and exploration, you can submit SQL statements in an interactive session. To automate your work, you can specify command-line options to process a single statement or a script file.

How will you store the results of Hive query in a file?

How to get the Impala query output log into a variable?

The way it works is that impala sends the query output in a different stream and the other information w.r.t the query in a different stream. the 2> will send the output containing the ” Fetched 1 row in 10seconds ” in the output file. Now you can grep it or do whatever you want .

How to set a variable in an Impala query using hue?

Initial research indicates that this is possible when working with the impala-shell but for HUE, I’ve found nothing. You can also use this script. Here type of variables int and date. Also can define a default value. Thanks for contributing an answer to Stack Overflow!

How to store a query result in a variable?

You can use BeeTamer for that. It allows to store result (or part of it) in a variable, and use this variable later in your code. Beetamer is a macro language / macro processor that allows to extend functionality of the Apache Hive and Cloudera Impala engines.

How to substitute a variable in a Hadoop query?

There’s an open feature request for adding variable substitution support to impala-shell: IMPALA-1067, to mimic Hive’s similar feature ( hive –hivevar param=60 substitutes $ {hivevar:param} inside a query with 60 ).

How will you store select query results in variable in hive?