yihua commented on code in PR #17660:
URL: https://github.com/apache/hudi/pull/17660#discussion_r2652015072


##########
hudi-spark-datasource/hudi-spark3.4.x/src/main/scala/org/apache/spark/sql/adapter/Spark3_4Adapter.scala:
##########
@@ -154,6 +154,13 @@ class Spark3_4Adapter extends BaseSpark3Adapter {
     Spark34OrcReader.build(vectorized, sqlConf, options, hadoopConf, 
dataSchema)
   }
 
+  override def createLanceFileReader(vectorized: Boolean,
+                                     sqlConf: SQLConf,
+                                     options: Map[String, String],
+                                     hadoopConf: Configuration): 
SparkColumnarFileReader = {
+    throw new UnsupportedOperationException("Lance format is not supported in 
Spark 3.4")

Review Comment:
   I couldn't recall when the decision was made.  If it's easy to add Lance 
support on Spark 3.4, we should do that.



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