How do you automate a hive?

How do you automate a hive?

We can easily do that with Hive automation. Before getting started, you will need to enable Automation in Hive Apps. Once enabled, open the Automation tool from the tile….Hive Automation

  1. Move an action card to a different project.
  2. Change an action’s assignee.
  3. Add label(s)
  4. Add a new sub action.
  5. Apply an action template.

How do you automate hive queries in Python?

Steps

  1. Install PyHive and Dependancies. Before we can query Hive using Python, we have to install the PyHive module and associated dependancies.
  2. Create Python Script.
  3. Start Hortonworks HDP Sandbox.
  4. Run Python Script.

What happens if you execute a hive query?

READ ALSO:   What kind of tape do you use for phone chargers?

Hive query is received from UI or from thrift server or CLI and it is received by driver. So the driver contacts the compiler to validate the hive query. Those results, execution engines sends back to the driver and driver finally sends back to the client program. This is how Hive communication happens.

Where is query execution time in hive?

Click on Tez View underneath Hive View button will display the execution time for job. Search for your application ID then you can get all logs and execution times.

How does Hive execute query?

1 Answer. User submitted SQL query is converted by Hive to physical operator tree which is optimized and converted to Tez Jobs and is then executed on Hadoop cluster. Distributed SQL query processing in Hadoop differs from conventional relational query engine when it comes to handling of intermediate result sets.

How do I reduce Hive query execution time?

READ ALSO:   Is the universe expanding at an infinite rate?

How to Improve Hive Query Performance With Hadoop

  1. Use Tez Engine. Apache Tez Engine is an extensible framework for building high-performance batch processing and interactive data processing.
  2. Use Vectorization.
  3. Use ORCFile.
  4. Use Partitioning.
  5. Use Bucketing.
  6. Cost-Based Query Optimization.

What is metadata in Hive?

What is Hive Metastore? Metastore is the central repository of Apache Hive metadata. It stores metadata for Hive tables (like their schema and location) and partitions in a relational database. It provides client access to this information by using metastore service API.

How can I find out what queries have been executed?

The only way you can find out what queries executed is by running a trace (either server-side or via SQL Profiler) during the time frame you’re interested in… but as far as a time in the past, that information is not recorded. I appreciate your reply.

Is there a way to enable a general query log?

44 You can enable a general query logfor that sort of diagnostic. Generally you don’t log all SELECT queries on a production server though, it’s a performance killer. Edit your MySQL config, e.g. /etc/mysql/my.cnf – look for, or add, a line like this

READ ALSO:   Can you hatch a chicken from a normal egg?

How do I set an expression to evaluate to Exec?

Set the property EvaluateAsExpression to True and then click the Ellipsis button against the Expression property. We need to set an expression that will evaluate to the EXEC stored procedure statement that can be later supplied to the inner Execute SQL Task. Set the following expression.

https://www.youtube.com/watch?v=pftoccjZFOM

By: AdminPosted on