This blog post explains how to incrementally convert streaming CSV data into Delta Lake with different latency requirements. A streaming CSV data source is used because it’s easy to demo, […]
This post explains how Spark registers native functions internally and the public facing APIs for you to register your own functions. Registering native functions is important if you want to […]
The summary and describe methods make it easy to explore the contents of a DataFrame at a high level. This post shows you how to use these methods. TL;DR – […]
This blog post explains how to compute the percentile, approximate percentile and median of a column in Spark. There are a variety of different ways to perform these computations and […]
Apache Spark code can be written with the Scala, Java, Python, or R APIs. Scala and Python are the most popular APIs. This blog post performs a detailed comparison of […]
Datasets are available to Spark Scala/Java users and offer more type safety than DataFrames. Python and R infer types during runtime, so these APIs cannot support the Datasets. This post […]
This post shows how to create beginningOfMonthDate and endOfMonthDate functions by leveraging the native Spark datetime functions. The native Spark datetime functions are not easy to use, so it’s important […]
You can use native Spark functions to compute the beginning and end dates for a week, but the code isn’t intuitive. This blog post demonstrates how to wrap the complex […]
This post explains how to migrate your Scala projects to Spark 3. It covers the high level steps and doesn’t get into all the details. Migrating PySpark projects is easier. […]
This blog post explains how to read a Google Sheet into a Spark DataFrame with the spark-google-spreadsheets library. Google Sheets is not a good place to store a lot of […]