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 18f8c53609812..2362a34c09c44 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
@@ -675,12 +675,21 @@ private[client] class Shim_v0_13 extends Shim_v0_12 {
     val useAdvanced = SQLConf.get.advancedPartitionPredicatePushdownEnabled
 
     object ExtractAttribute {
+      var castToStr = false
+
       def unapply(expr: Expression): Option[Attribute] = {
         expr match {
-          case attr: Attribute => Some(attr)
+          case attr: Attribute
+              if (!castToStr || attr.dataType == StringType) =>
+            castToStr = false
+            Some(attr)
           case Cast(child @ AtomicType(), dt: AtomicType, _)
-              if Cast.canUpCast(child.dataType.asInstanceOf[AtomicType], dt) => unapply(child)
-          case _ => None
+              if Cast.canUpCast(child.dataType.asInstanceOf[AtomicType], dt) =>
+            castToStr = (castToStr || dt == StringType)
+            unapply(child)
+          case _ =>
+            castToStr = false
+            None
         }
       }
     }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 29de55f7040f1..d7abc3f0e9e0c 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -2384,4 +2384,13 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
       }
     }
   }
+
+  test("SPARK-27814: test cast operation for partition key") {
+    withTable("t1") {
+      sql("CREATE TABLE t1(c1 INT, c2 STRING) PARTITIONED BY (p1 INT)")
+      sql("INSERT INTO TABLE t1 PARTITION (p1 = 5) values(1, 'str')")
+      checkAnswer(sql("SELECT c1 FROM t1 WHERE CAST(p1 as STRING) = '5'"), Row(1))
+      checkAnswer(sql("SELECT c1 FROM t1 WHERE CAST( CAST(p1 AS BIGINT) AS STRING) = '5'"), Row(1))
+    }
+  }
 }