Omega359 commented on code in PR #58:
URL: https://github.com/apache/datafusion-site/pull/58#discussion_r1989463073
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content/blog/2025-03-11-ordering-analysis.md:
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+---
+layout: post
+title: Using Ordering for Better Plans in Apache DataFusion
+date: 2025-03-11
+author: Mustafa Akur, Andrew Lamb
+categories: [tutorial]
+---
+
+<!--
+{% 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.
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+(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.
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+limitations under the License.
+{% endcomment %}
+-->
+
+<!-- see https://github.com/apache/datafusion/issues/11631 for details -->
+
+## Introduction
+In this blog post, we explain when an ordering requirement of an operator is
satisfied by its input data. This analysis is essential for order-based
optimizations and is often more complex than one might initially think.
+<blockquote style="border-left: 4px solid #007bff; padding: 10px;
background-color: #f8f9fa;">
+ <strong>Ordering Requirement</strong> for an operator describes how the
input data to that operator must be sorted for the operator to compute the
correct result. It is the job of the planner to make sure that these
requirements are satisfied during execution (See DataFusion <a
href="https://docs.rs/datafusion/latest/datafusion/physical_optimizer/enforce_sorting/struct.EnforceSorting.html";
target="_blank">EnforceSorting</a> for an implementation of such rule).
+</blockquote>
+
+There are various use cases, where this type of analysis can be useful such as
the following examples.
Review Comment:
```suggestion
There are various use cases where this type of analysis can be useful such
as the following examples.
```
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