[Enhancement](partial update) Support including delete sign column in partial update stream load

fe/fe-core/src/main/java/org/apache/doris/planner/StreamLoadPlanner.java

@@ -153,9 +153,9 @@ public TExecPlanFragmentParams plan(TUniqueId loadId, int fragmentInstanceIdInde
                 for (ImportColumnDesc importColumnDesc : taskInfo.getColumnExprDescs().descs) {
                     if (importColumnDesc.getColumnName() != null
                             && importColumnDesc.getColumnName().equals(col.getName())) {
-                        if (!col.isVisible()) {
-                            throw new UserException("Partial update should not include invisible column: "
-                                + col.getName());
+                        if (!col.isVisible() && !Column.DELETE_SIGN.equals(col.getName())) {
+                            throw new UserException("Partial update should not include invisible column except"
+                                    + " delete sign column: " + col.getName());
                         }
                         partialUpdateInputColumns.add(col.getName());
                         if (destTable.hasSequenceCol() && (taskInfo.hasSequenceCol() || (

regression-test/data/unique_with_mow_p0/partial_update/delete_sign.csv

@@ -0,0 +1,3 @@
+1,1
+3,1
+5,1

regression-test/data/unique_with_mow_p0/partial_update/test_partial_update_delete_sign.out

@@ -0,0 +1,22 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !sql --
+1	1	1	1	1
+2	2	2	2	2
+3	3	3	3	3
+4	4	4	4	4
+5	5	5	5	5
+
+-- !after_delete --
+2	2	2	2	2
+4	4	4	4	4
+
+-- !with_delete_sign --
+1	\N	\N	\N	\N	1
+1	1	1	1	1	0
+2	2	2	2	2	0
+3	\N	\N	\N	\N	1
+3	3	3	3	3	0
+4	4	4	4	4	0
+5	\N	\N	\N	\N	1
+5	5	5	5	5	0
+

regression-test/suites/unique_with_mow_p0/partial_update/test_partial_update_delete_sign.groovy

@@ -0,0 +1,60 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+suite('test_partial_update_delete_sign') {
+    sql 'set enable_nereids_planner=false'
+    sql "set experimental_enable_nereids_planner=false;"
+    sql 'set enable_nereids_dml=false'
+
+    def tableName1 = "test_partial_update_delete_sign1"
+    sql "DROP TABLE IF EXISTS ${tableName1};"
+    sql """ CREATE TABLE IF NOT EXISTS ${tableName1} (
+            `k1` int NOT NULL,
+            `c1` int,
+            `c2` int,
+            `c3` int,
+            `c4` int
+            )UNIQUE KEY(k1)
+        DISTRIBUTED BY HASH(k1) BUCKETS 1
+        PROPERTIES (
+            "enable_unique_key_merge_on_write" = "true",
+            "disable_auto_compaction" = "true",
+            "replication_num" = "1"
+        );"""
+
+    sql "insert into ${tableName1} values(1,1,1,1,1),(2,2,2,2,2),(3,3,3,3,3),(4,4,4,4,4),(5,5,5,5,5);"
+    qt_sql "select * from ${tableName1} order by k1,c1,c2,c3,c4;"
+    streamLoad {
+        table "${tableName1}"
+
+        set 'column_separator', ','
+        set 'format', 'csv'
+        set 'partial_columns', 'true'
+        set 'columns', 'k1,__DORIS_DELETE_SIGN__'
+
+        file 'delete_sign.csv'
+        time 10000 // limit inflight 10s
+    }
+    sql "sync"
+    qt_after_delete "select * from ${tableName1} order by k1,c1,c2,c3,c4;"
+    sql "set skip_delete_sign=true;"
+    sql "set skip_storage_engine_merge=true;"
+    sql "set skip_delete_bitmap=true;"
+    sql "sync"
+    qt_with_delete_sign "select k1,c1,c2,c3,c4,__DORIS_DELETE_SIGN__ from ${tableName1} order by k1,c1,c2,c3,c4,__DORIS_DELETE_SIGN__;"
+    sql "drop table if exists ${tableName1};"
+}