diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala
index f740915b6d033..7b8216eb75755 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala
@@ -658,7 +658,12 @@ case class DescribeTableCommand(
       throw QueryCompilationErrors.descPartitionNotAllowedOnView(table.identifier)
     }
     DDLUtils.verifyPartitionProviderIsHive(spark, metadata, "DESC PARTITION")
-    val partition = catalog.getPartition(table, partitionSpec)
+    val normalizedPartSpec = PartitioningUtils.normalizePartitionSpec(
+      partitionSpec,
+      metadata.partitionSchema,
+      table.quotedString,
+      spark.sessionState.conf.resolver)
+    val partition = catalog.getPartition(table, normalizedPartSpec)
     if (isExtended) describeFormattedDetailedPartitionInfo(table, metadata, partition, result)
   }
 
diff --git a/sql/core/src/test/resources/sql-tests/inputs/describe.sql b/sql/core/src/test/resources/sql-tests/inputs/describe.sql
index a0ee9322372ba..deff5bb7ca6fc 100644
--- a/sql/core/src/test/resources/sql-tests/inputs/describe.sql
+++ b/sql/core/src/test/resources/sql-tests/inputs/describe.sql
@@ -43,6 +43,8 @@ DESC EXTENDED t PARTITION (c='Us', d=1);
 
 DESC FORMATTED t PARTITION (c='Us', d=1);
 
+DESC EXTENDED t PARTITION (C='Us', D=1);
+
 -- NoSuchPartitionException: Partition not found in table
 DESC t PARTITION (c='Us', d=2);
 
diff --git a/sql/core/src/test/resources/sql-tests/results/describe.sql.out b/sql/core/src/test/resources/sql-tests/results/describe.sql.out
index 7634c112ab81a..8a2a59eb8f988 100644
--- a/sql/core/src/test/resources/sql-tests/results/describe.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/describe.sql.out
@@ -1,5 +1,5 @@
 -- Automatically generated by SQLQueryTestSuite
--- Number of queries: 41
+-- Number of queries: 42
 
 
 -- !query
@@ -324,6 +324,37 @@ Location [not included in comparison]/{warehouse_dir}/t
 Storage Properties  	[a=1, b=2]
 
 
+-- !query
+DESC EXTENDED t PARTITION (C='Us', D=1)
+-- !query schema
+struct<col_name:string,data_type:string,comment:string>
+-- !query output
+a                   	string              	                    
+b                   	int                 	                    
+c                   	string              	                    
+d                   	string              	                    
+# Partition Information	                    	                    
+# col_name          	data_type           	comment             
+c                   	string              	                    
+d                   	string              	                    
+                    	                    	                    
+# Detailed Partition Information	                    	                    
+Database            	default             	                    
+Table               	t                   	                    
+Partition Values    	[c=Us, d=1]         	                    
+Location [not included in comparison]/{warehouse_dir}/t/c=Us/d=1	                    
+Storage Properties  	[a=1, b=2]          	                    
+Created Time [not included in comparison]
+Last Access [not included in comparison]
+                    	                    	                    
+# Storage Information	                    	                    
+Num Buckets         	2                   	                    
+Bucket Columns      	[`a`]               	                    
+Sort Columns        	[`b`]               	                    
+Location [not included in comparison]/{warehouse_dir}/t	                    
+Storage Properties  	[a=1, b=2]
+
+
 -- !query
 DESC t PARTITION (c='Us', d=2)
 -- !query schema