Peter Hoffmann

#PARQUET

DuckDB vs. Azure Synapse SQL on-demand with Parquet

Inspired by Uwe Korns post on DuckDB this post shows how to use Azure Synapse SQL-on-Demand to query parquet files with T-SQL on a serverless cloud infrastructure. Read more →

Azure Data Explorer and Parquet Files in Azure Blob Storage

Last summer Microsoft has rebranded the Azure Kusto Query engine as Azure Data Explorer. While it does not support fully elastic scaling, it at least allows to scale up and out a cluster via an API or the Azure portal to adapt to different workloads. It also offers parquet support out of the box which made me spend some time to look into it. Read more →

Understanding Predicate Pushdown at the Row-Group Level in Parquet with PyArrow and Python

How predicate pushdown works on row group level in Apache Parquet, and how to use the row group statistics with pyarrow to read only the data you need. Read more →