alamb commented on code in PR #79:
URL: https://github.com/apache/datafusion-site/pull/79#discussion_r2188284374
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content/blog/2025-07-07-user-defined-parquet-indexes.md:
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@@ -0,0 +1,542 @@
+---
+layout: post
+title: Extending Apache Parquet with User Defined Indexes to Accelerate Query
Processing with DataFusion
+date: 2025-07-07
+author: Qi Zhu, Jigao Luo, and Andrew Lamb
+categories: [features]
+---
+<!--
+{% comment %}
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements. See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to you under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
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+
+http://www.apache.org/licenses/LICENSE-2.0
+
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+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
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+{% endcomment %}
+-->
+
+It’s a common misconception that [Apache Parquet] files can only store basic
Min/Max/Null Count statistics and Bloom filters, and that adding anything
"smarter" requires a change to the specification or an entirely new file
format. In fact, footer metadata and offset based addressing already provide
everything needed to embed user defined index structures within Parquet Files
without breaking compatibility with other Parquet readers.
Review Comment:
FYI I am very pleased with this intro as I think it succinctly summarizes
the value of this blog and will get people excited
<img width="828" alt="Screenshot 2025-07-06 at 9 35 24 AM"
src="https://github.com/user-attachments/assets/a86a5d3f-c90e-426a-b75d-493b78adb1da";
/>
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