diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala
index 2b80660..8df43b7 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala
@@ -708,7 +708,8 @@
         .map(col => col.getName).toSet
 
       def unapply(attr: Attribute): Option[String] = {
-        if (varcharKeys.contains(attr.name)) {
+        val resolver = SQLConf.get.resolver
+        if (varcharKeys.exists(c => resolver(c, attr.name))) {
           None
         } else if (attr.dataType.isInstanceOf[IntegralType] || attr.dataType == StringType) {
           Some(attr.name)
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala
index e8548fd..e8cf4ad 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala
@@ -2720,4 +2720,14 @@
       checkAnswer(sql("SHOW PARTITIONS ta_part"), Row("ts=10") :: Nil)
     }
   }
+
+  test("SPARK-31904: Fix case sensitive problem of char and varchar partition columns") {
+    withTable("t1", "t2") {
+      sql("CREATE TABLE t1(a STRING, B VARCHAR(10), C CHAR(10)) STORED AS parquet")
+      sql("CREATE TABLE t2 USING parquet PARTITIONED BY (b, c) AS SELECT * FROM t1")
+      // make sure there is no exception
+      assert(sql("SELECT * FROM t2 WHERE b = 'A'").collect().isEmpty)
+      assert(sql("SELECT * FROM t2 WHERE c = 'A'").collect().isEmpty)
+    }
+  }
 }