[fix](partial update) Fix NPE when the query statement of an update s…

…tatement is a point query in `OriginPlanner` (#26881)

close #26882
We should not use the singleNodePlan to generate the rootPlanFragment if the query is inside a insert statement or distributedPlanner will be null.
introduced in #15491

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

@@ -211,7 +211,7 @@ public void createPlanFragments(StatementBase statement, Analyzer analyzer, TQue
  }
  checkAndSetTopnOpt(singleNodePlan);
 
- if (queryOptions.num_nodes == 1 || queryStmt.isPointQuery()) {
+ if ((queryOptions.num_nodes == 1 || queryStmt.isPointQuery()) && !(statement instanceof InsertStmt)) {
  // single-node execution; we're almost done
  singleNodePlan = addUnassignedConjuncts(analyzer, singleNodePlan);
  fragments.add(new PlanFragment(plannerContext.getNextFragmentId(), singleNodePlan,

regression-test/data/update/test_update_mow.out

@@ -23,3 +23,18 @@ date_value DATE Yes false \N NONE
 2 20 2 2000.0 2000-01-02
 3 3 3 3.0 2000-01-03
 
+-- !sql --
+a 1 2023-11-12T00:00 test1 1
+b 2 2023-11-12T00:00 test2 2
+c 3 2023-11-12T00:00 test3 3
+
+-- !sql --
+a 1 2023-11-12T00:00 test1 999
+b 2 2023-11-12T00:00 test2 2
+c 3 2023-11-12T00:00 test3 3
+
+-- !sql --
+a 1 2023-11-12T00:00 test1 999
+b 2 2023-11-12T00:00 test2 2
+c 3 2022-01-01T00:00 update value 3
+

regression-test/suites/update/test_update_mow.groovy

@@ -96,4 +96,35 @@ suite("test_update_mow", "p0") {
  sql "DROP TABLE IF EXISTS ${tbName2}"
  sql "DROP TABLE IF EXISTS ${tbName3}"
  sql "DROP TABLE IF EXISTS ${tbName4}"
+
+
+ sql "set experimental_enable_nereids_planner=false;"
+ sql "set enable_nereids_planner=false"
+ sql "sync"
+ def tableName5 = "test_update_mow_5"
+ sql "DROP TABLE IF EXISTS ${tableName5}"
+ sql """ CREATE TABLE ${tableName5} (
+ k1 varchar(100) NOT NULL,
+ k2 int(11) NOT NULL,
+ v1 datetime NULL,
+ v2 varchar(100) NULL,
+ v3 int NULL) ENGINE=OLAP UNIQUE KEY(k1, k2) COMMENT 'OLAP'
+ DISTRIBUTED BY HASH(k1, k2) BUCKETS 3
+ PROPERTIES (
+ "replication_allocation" = "tag.location.default: 1",
+ "enable_unique_key_merge_on_write" = "true",
+ "light_schema_change" = "true",
+ "store_row_column" = "true",
+ "enable_single_replica_compaction" = "false");"""
+ sql """insert into ${tableName5} values
+ ("a",1,"2023-11-12 00:00:00","test1",1),
+ ("b",2,"2023-11-12 00:00:00","test2",2),
+ ("c",3,"2023-11-12 00:00:00","test3",3);"""
+ qt_sql "select * from ${tableName5} order by k1,k2"
+ sql """update ${tableName5} set v3=999 where k1="a" and k2=1;"""
+ qt_sql "select * from ${tableName5} order by k1,k2" 
+ sql """update ${tableName5} set v2="update value", v1="2022-01-01 00:00:00" where k1="c" and k2=3;"""
+ qt_sql "select * from ${tableName5} order by k1,k2" 
+
+ sql "DROP TABLE IF EXISTS ${tableName5}"
 }