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How to Read and transform a Parquet file into CSV format

Veröffentlichungsdatum: Mar 2, 2024
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GOAL

You need to transform a Parquet file from Azure Data Lake, Amazon S3, or any other source, into another format like CSV and/or vice-versa.

STEPS TO FOLLOW

Currently, MuleSoft does not provide an 'Out of the Box' connector or solution to handle files using the Apache Parquet file format, but as an alternative, based on the structure of the Apache Parquet file format [https://parquet.apache.org/documentation/latest/], you can build/generate a Flatfile Schema based on this structure, by following our documentation [https://docs.mulesoft.com/mule-runtime/4.3/dataweave-flat-file-schemas]. With this schema defined, you can read the Parquet file and using a Transform Message component, to convert it to a CSV structure, or any other format that you require. See our documentation for more information on the Transform Message component [https://docs.mulesoft.com/studio/7.10/transform-message-component-concept-studio].

If needed, you can also write a custom Java library of your own (or use a third-party library) to handle the Parquet File format, and invoke it from a Mule application, using the Mule Java Module [https://docs.mulesoft.com/java-module/1.2/].

DISCLAIMER

Please keep in mind that Mulesoft does not provide support for Custom Java code, or third-party Java libraries.

 

Nummer des Knowledge-Artikels

001116845

 
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