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Category: Spark

spark zip function – zip, zipPartition, zipWithIndex, zipWithUniqueId example

May, 2018 adarsh 2d Comments

Spark has support for zipping rdds using functions like zip, zipPartition, zipWithIndex and zipWithUniqueId . Lets go through each of…

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Posted in: Data Analytics, performance tuning, Spark Filed under: Spark Rdd

window functions in spark sql and dataframe – ranking functions,analytic functions and aggregate function

April, 2018 adarsh

A window function calculates a return value for every input row of a table based on a group of rows,…

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Posted in: Spark Filed under: datasets and dataframe, Spark Rdd

Finding difference between two dataframes at column level in spark

April, 2018 adarsh

Here we want to find the difference between two dataframes at a column level . We can use the dataframe1.except(dataframe2)…

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Posted in: Spark Filed under: datasets and dataframe, Spark Rdd

Spark dataframe split one column into multiple columns using split function

adarsh 3d Comments

Lets say we have dataset as below and we want to split a single column into multiple columns using withcolumn…

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Posted in: Spark Filed under: datasets and dataframe, Spark Rdd

How to create spark dataframe from Java List

adarsh

Lets create a dataframe from list of row object . First populate the list with row object and then we…

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Posted in: Spark Filed under: datasets and dataframe, Spark Rdd

oozie spark action workflow example

March, 2018 adarsh 1 Comment

Lets create oozie workflow with spark action for creating a inverted index use case. Inverted index pattern is used to…

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Posted in: Data Analytics, Oozie, Spark Filed under: oozie workflow, Spark Rdd

reading orc file in spark

adarsh

We will be using the hadoopFile method of spark context to read the orc file . Below is the method…

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Posted in: Spark Filed under: Spark Rdd

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