pig relational operators - Wikitechy https://www.wikitechy.com/interview-questions/tag/pig-relational-operators/ Interview Questions Wed, 15 Sep 2021 05:17:20 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png pig relational operators - Wikitechy https://www.wikitechy.com/interview-questions/tag/pig-relational-operators/ 32 32 What is workflow when using Pig & R ? https://www.wikitechy.com/interview-questions/apache-pig/what-is-workflow-when-using-pig-r/ https://www.wikitechy.com/interview-questions/apache-pig/what-is-workflow-when-using-pig-r/#respond Mon, 12 Jul 2021 06:37:19 +0000 https://www.wikitechy.com/interview-questions/?p=185

Workflow when using Pig & R

  • Pig programming language is used for obtaining and manipulating data perhaps doing otherwise with UDFs.
  • Pig is used for filtering, cleaning, transforming and otherwise preparing large data sets.
  • Depending on the workflow, user might throw a Hive table on top of the Pig output and then use Hive to prepare subsets of data for R.
  • R is used for analysis and modeling and it’s also act as prototype models.
  • There are ways to connect directly to Hive from R using the Hive JDBC drivers.
  • We use R for early data exploration and examination of results.
  • In a normal workflow, Pig is used to perform the ETL(Extract, Transform, Load) functionality and transform it load the data into HDFS and analysts utilizes HIVE or extensions like RHIVE to perform the analysis on large volume of data available in HDFS.
  • The Comparison between Pig & R is invalid for ever because the pig is for large scale data and R definitely is not.
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Apache Pig

    • Apache Pig is used to creating programs that runs on Apache Hadoop.
    • Pig Latin is a language.
    • It execute in Hadoop jobs,MapReduce, Apache Tez, or Apache Spark
Big Data
The programming from the Java MapReduce idiom into a notation which makes MapReduce high level, similar to SQL for relational database management systems.
  • The user-defined functions (UDFs) called Pig Latin user can write in Java, Python, JavaScript, Ruby or Groovy.
Creating your first pig script

Advantages of Pig

  • Reusing the code
  • Quick development
  • Less lines of code
  • Type checking and Schema etc.

Simple program for pig:

  • Map: The data element consisting the data type chararray where element has pig data type include complex data type
  • Example- [city’#’bang’,’pin’#560001].
  • The city and pin are data element mapping the values here.
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