From b472d4ea22cd19361bdc3d07cda81fd03e52dc08 Mon Sep 17 00:00:00 2001
From: Jiaheng Tang <audi.ttrs.coupe@gmail.com>
Date: Fri, 3 May 2024 10:37:46 -0700
Subject: [PATCH] [Example] Update clustering example for 3.2 (#2991)

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#### Which Delta project/connector is this regarding?
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- [ ] Spark
- [ ] Standalone
- [ ] Flink
- [ ] Kernel
- [x] Other (Example)

## Description

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- Describe what this PR changes.
- Describe why we need the change.

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correctly link and close the issue upon merge.
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Update clustering example for delta 3.2
## How was this patch tested?

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Manually ran the example
```
python3 run-integration-tests.py --use-local
```
## Does this PR introduce _any_ user-facing changes?

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No
---
 .../src/main/scala/example/Clustering.scala   | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/examples/scala/src/main/scala/example/Clustering.scala b/examples/scala/src/main/scala/example/Clustering.scala
index 12ffafee19f..5c59e16e172 100644
--- a/examples/scala/src/main/scala/example/Clustering.scala
+++ b/examples/scala/src/main/scala/example/Clustering.scala
@@ -15,6 +15,8 @@
  */
 package example
 
+import io.delta.tables.DeltaTable
+
 import org.apache.spark.sql.SparkSession
 
 object Clustering {
@@ -51,6 +53,29 @@ object Clustering {
       // Optimize the table
       println("Optimize the table")
       deltaSpark.sql(s"OPTIMIZE $tableName")
+
+      // Change the clustering columns
+      println("Change the clustering columns")
+      deltaSpark.sql(
+        s"""ALTER TABLE $tableName CLUSTER BY (col2, col1)""".stripMargin)
+
+
+      // Check the clustering columns
+      println("Check the clustering columns")
+      deltaSpark.sql(s"DESCRIBE DETAIL $tableName").show(false)
+    } finally {
+      // Cleanup
+      deltaSpark.sql(s"DROP TABLE IF EXISTS $tableName")
+    }
+
+    // DeltaTable clusterBy Scala API
+    try {
+      val table = io.delta.tables.DeltaTable.create()
+        .tableName(tableName)
+        .addColumn("col1", "INT")
+        .addColumn("col2", "STRING")
+        .clusterBy("col1", "col2")
+        .execute()
     } finally {
       // Cleanup
       deltaSpark.sql(s"DROP TABLE IF EXISTS $tableName")