diff --git a/pkg/datasource/sql/exec/at/insert_on_update_executor.go b/pkg/datasource/sql/exec/at/insert_on_update_executor.go
index 8566a493..4b23ec9d 100644
--- a/pkg/datasource/sql/exec/at/insert_on_update_executor.go
+++ b/pkg/datasource/sql/exec/at/insert_on_update_executor.go
@@ -169,6 +169,9 @@ func (i *insertOnUpdateExecutor) buildBeforeImageSQL(insertStmt *ast.InsertStmt,
 			for _, columnMeta := range index.Columns {
 				columnName := columnMeta.ColumnName
 				imageParameters, ok := paramMap[columnName]
+				if !ok {
+					imageParameters = paramMap[strings.ToLower(columnName)]
+				}
 				if !ok && columnMeta.ColumnDef != nil {
 					if strings.EqualFold("PRIMARY", index.Name) {
 						i.beforeImageSqlPrimaryKeys[columnName] = true
@@ -373,6 +376,10 @@ func isIndexValueNull(indexMeta types.IndexMeta, imageParameterMap map[string][]
 	for _, colMeta := range indexMeta.Columns {
 		columnName := colMeta.ColumnName
 		imageParameters := imageParameterMap[columnName]
+		if imageParameters == nil {
+			imageParameters = imageParameterMap[strings.ToLower(columnName)]
+		}
+
 		if imageParameters == nil && colMeta.ColumnDef == nil {
 			return true
 		} else if imageParameters != nil && (rowIndex >= len(imageParameters) || imageParameters[rowIndex].Value == nil) {
diff --git a/pkg/datasource/sql/exec/at/insert_on_update_executor_test.go b/pkg/datasource/sql/exec/at/insert_on_update_executor_test.go
index aeca9c70..7f6f89b6 100644
--- a/pkg/datasource/sql/exec/at/insert_on_update_executor_test.go
+++ b/pkg/datasource/sql/exec/at/insert_on_update_executor_test.go
@@ -41,12 +41,17 @@ func TestInsertOnUpdateBeforeImageSQL(t *testing.T) {
 		index2      = make(map[string]types.IndexMeta)
 		columnMeta1 []types.ColumnMeta
 		columnMeta2 []types.ColumnMeta
+		columnMeta3 []types.ColumnMeta
 		ColumnNames []string
 	)
 	columnId := types.ColumnMeta{
 		ColumnDef:  nil,
 		ColumnName: "id",
 	}
+	columnCapitalId := types.ColumnMeta{
+		ColumnDef:  nil,
+		ColumnName: "CAPITALIZED_ID",
+	}
 	columnName := types.ColumnMeta{
 		ColumnDef:  nil,
 		ColumnName: "name",
@@ -56,10 +61,12 @@ func TestInsertOnUpdateBeforeImageSQL(t *testing.T) {
 		ColumnName: "age",
 	}
 	columns["id"] = columnId
+	columns["CAPITALIZED_ID"] = columnCapitalId
 	columns["name"] = columnName
 	columns["age"] = columnAge
 	columnMeta1 = append(columnMeta1, columnId)
 	columnMeta2 = append(columnMeta2, columnName, columnAge)
+	columnMeta3 = append(columnMeta3, columnCapitalId)
 	index["id"] = types.IndexMeta{
 		Name:    "PRIMARY",
 		IType:   types.IndexTypePrimaryKey,
@@ -70,6 +77,11 @@ func TestInsertOnUpdateBeforeImageSQL(t *testing.T) {
 		IType:   types.IndexUnique,
 		Columns: columnMeta2,
 	}
+	index["capitalized_id_index"] = types.IndexMeta{
+		Name:    "CAPITALIZED_ID_INDEX",
+		IType:   types.IndexUnique,
+		Columns: columnMeta3,
+	}
 
 	ColumnNames = []string{"id", "name", "age"}
 	tableMeta1 = types.TableMeta{
@@ -117,12 +129,34 @@ func TestInsertOnUpdateBeforeImageSQL(t *testing.T) {
 				Query:       "insert into t_user(id, name, age) values(1,'Jack1',?) on duplicate key update name = 'Michael',age = ?",
 				MetaDataMap: map[string]types.TableMeta{"t_user": tableMeta1},
 			},
-			sourceQueryArgs:  []driver.Value{81, "Link", 18},
+			sourceQueryArgs:  []driver.Value{81, "Link"},
+			expectQuery1:     "SELECT * FROM t_user  WHERE (id = ? )  OR (name = ?  and age = ? ) ",
+			expectQueryArgs1: []driver.Value{int64(1), "Jack1", 81},
+			expectQuery2:     "SELECT * FROM t_user  WHERE (name = ?  and age = ? )  OR (id = ? ) ",
+			expectQueryArgs2: []driver.Value{"Jack1", 81, int64(1)},
+		},
+		{
+			execCtx: &types.ExecContext{
+				Query:       "insert into t_user(ID, name, age) values(1,'Jack1',?) on duplicate key update name = 'Michael',age = ?",
+				MetaDataMap: map[string]types.TableMeta{"t_user": tableMeta1},
+			},
+			sourceQueryArgs:  []driver.Value{81, "Link"},
 			expectQuery1:     "SELECT * FROM t_user  WHERE (id = ? )  OR (name = ?  and age = ? ) ",
 			expectQueryArgs1: []driver.Value{int64(1), "Jack1", 81},
 			expectQuery2:     "SELECT * FROM t_user  WHERE (name = ?  and age = ? )  OR (id = ? ) ",
 			expectQueryArgs2: []driver.Value{"Jack1", 81, int64(1)},
 		},
+		{
+			execCtx: &types.ExecContext{
+				Query:       "insert into t_user(ID, capitalized_id) values(1, 11) on duplicate key update name = 'Michael',age = ?",
+				MetaDataMap: map[string]types.TableMeta{"t_user": tableMeta1},
+			},
+			sourceQueryArgs:  []driver.Value{"Jack1"},
+			expectQuery1:     "SELECT * FROM t_user  WHERE (id = ? )  OR (CAPITALIZED_ID = ? ) ",
+			expectQueryArgs1: []driver.Value{int64(1), int64(11)},
+			expectQuery2:     "SELECT * FROM t_user  WHERE (CAPITALIZED_ID = ? )  OR (id = ? ) ",
+			expectQueryArgs2: []driver.Value{int64(11), int64(1)},
+		},
 		// multi insert one index
 		{
 			execCtx: &types.ExecContext{