diff --git a/fe/fe-core/src/main/java/com/starrocks/sql/ast/UpdateStmt.java b/fe/fe-core/src/main/java/com/starrocks/sql/ast/UpdateStmt.java
index 596d5faa954d6..c14f8273f4ffa 100644
--- a/fe/fe-core/src/main/java/com/starrocks/sql/ast/UpdateStmt.java
+++ b/fe/fe-core/src/main/java/com/starrocks/sql/ast/UpdateStmt.java
@@ -50,7 +50,7 @@ public UpdateStmt(TableName tableName, List<ColumnAssignment> assignments, List<
         this.fromRelations = fromRelations;
         this.wherePredicate = wherePredicate;
         this.commonTableExpressions = commonTableExpressions;
-        this.assignmentColumns = Sets.newHashSet();
+        this.assignmentColumns = Sets.newTreeSet(String.CASE_INSENSITIVE_ORDER);
         for (ColumnAssignment each : assignments) {
             this.assignmentColumns.add(each.getColumn());
         }
diff --git a/fe/fe-core/src/test/java/com/starrocks/sql/plan/UpdatePlanTest.java b/fe/fe-core/src/test/java/com/starrocks/sql/plan/UpdatePlanTest.java
index 9cf109551fa5a..b289f82bc11b5 100644
--- a/fe/fe-core/src/test/java/com/starrocks/sql/plan/UpdatePlanTest.java
+++ b/fe/fe-core/src/test/java/com/starrocks/sql/plan/UpdatePlanTest.java
@@ -50,6 +50,18 @@ public void testUpdate() throws Exception {
         testExplain("explain costs update tprimary set v2 = v2 + 1 where v1 = 'aaa'");
     }
 
+    @Test
+    public void testColumnPartialUpdate() throws Exception {
+        String oldVal = connectContext.getSessionVariable().getPartialUpdateMode();
+        connectContext.getSessionVariable().setPartialUpdateMode("column");
+        testExplain("explain update tprimary set v2 = v2 + 1 where v1 = 'aaa'");
+        testExplain("explain update tprimary set v2 = DEFAULT where v1 = 'aaa'");
+        testExplain("explain update tprimary_auto_increment set v2 = DEFAULT where v1 = '123'");
+        testExplain("explain verbose update tprimary set v2 = v2 + 1 where v1 = 'aaa'");
+        testExplain("explain costs update tprimary set v2 = v2 + 1 where v1 = 'aaa'");
+        connectContext.getSessionVariable().setPartialUpdateMode(oldVal);
+    }
+
     private void testExplain(String explainStmt) throws Exception {
         connectContext.setQueryId(UUIDUtil.genUUID());
         connectContext.setExecutionId(UUIDUtil.toTUniqueId(connectContext.getQueryId()));
diff --git a/test/sql/test_partial_update_column_mode/R/test_upper_case_partial_update b/test/sql/test_partial_update_column_mode/R/test_upper_case_partial_update
new file mode 100644
index 0000000000000..f443625ae2b1a
--- /dev/null
+++ b/test/sql/test_partial_update_column_mode/R/test_upper_case_partial_update
@@ -0,0 +1,49 @@
+-- name: test_upper_case_partial_update
+show backends;
+CREATE table tab1 (
+      k1 INTEGER,
+      k2 VARCHAR(50),
+      V1 INTEGER,
+      v2 INTEGER,
+      v3 INTEGER,
+      v4 varchar(50),
+      v5 varchar(50)
+)
+ENGINE=OLAP
+PRIMARY KEY(`k1`,`k2`)
+DISTRIBUTED BY HASH(`k1`) BUCKETS 10
+PROPERTIES (
+    "replication_num" = "1"
+);
+-- result:
+-- !result
+insert into tab1 values (100, "k2_100", 100, 100, 100, "v4_100", "v5_100");
+-- result:
+-- !result
+insert into tab1 values (200, "k2_200", 200, 200, 200, "v4_200", "v5_200");
+-- result:
+-- !result
+insert into tab1 values (300, "k3_300", 300, 300, 300, "v4_300", "v5_300");
+-- result:
+-- !result
+select * from tab1;
+-- result:
+300	k3_300	300	300	300	v4_300	v5_300
+100	k2_100	100	100	100	v4_100	v5_100
+200	k2_200	200	200	200	v4_200	v5_200
+-- !result
+set partial_update_mode = 'column';
+-- result:
+-- !result
+update tab1 set V1 = 101 where k1 = 100 and k2 = "k2_100";
+-- result:
+-- !result
+update tab1 set v1 = 202 where k1 = 200 and k2 = "k2_200";
+-- result:
+-- !result
+select * from tab1;
+-- result:
+300	k3_300	300	300	300	v4_300	v5_300
+100	k2_100	101	100	100	v4_100	v5_100
+200	k2_200	202	200	200	v4_200	v5_200
+-- !result
\ No newline at end of file
diff --git a/test/sql/test_partial_update_column_mode/T/test_upper_case_partial_update b/test/sql/test_partial_update_column_mode/T/test_upper_case_partial_update
new file mode 100644
index 0000000000000..bfe009cd3f3b7
--- /dev/null
+++ b/test/sql/test_partial_update_column_mode/T/test_upper_case_partial_update
@@ -0,0 +1,27 @@
+-- name: test_upper_case_partial_update
+show backends;
+CREATE table tab1 (
+      k1 INTEGER,
+      k2 VARCHAR(50),
+      V1 INTEGER,
+      v2 INTEGER,
+      v3 INTEGER,
+      v4 varchar(50),
+      v5 varchar(50)
+)
+ENGINE=OLAP
+PRIMARY KEY(`k1`,`k2`)
+DISTRIBUTED BY HASH(`k1`) BUCKETS 10
+PROPERTIES (
+    "replication_num" = "1"
+);
+
+insert into tab1 values (100, "k2_100", 100, 100, 100, "v4_100", "v5_100");
+insert into tab1 values (200, "k2_200", 200, 200, 200, "v4_200", "v5_200");
+insert into tab1 values (300, "k3_300", 300, 300, 300, "v4_300", "v5_300");
+select * from tab1;
+
+set partial_update_mode = 'column';
+update tab1 set V1 = 101 where k1 = 100 and k2 = "k2_100";
+update tab1 set v1 = 202 where k1 = 200 and k2 = "k2_200";
+select * from tab1;
\ No newline at end of file