branch-2.1: [bugfix](query) Fix for incorrect query results of variant type #51651 (#51707)

### What problem does this PR solve?

Cherry-picked from #51651

### Release note

None

### Check List (For Author)

- Test <!-- At least one of them must be included. -->
    - [ ] Regression test
    - [ ] Unit Test
    - [ ] Manual test (add detailed scripts or steps below)
    - [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
        - [ ] Previous test can cover this change.
        - [ ] No code files have been changed.
        - [ ] Other reason <!-- Add your reason?  -->

- Behavior changed:
    - [ ] No.
    - [ ] Yes. <!-- Explain the behavior change -->

- Does this need documentation?
    - [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->

### Check List (For Reviewer who merge this PR)

- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR
should merge into -->

fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/LogicalResultSinkToShortCircuitPointQuery.java

@@ -65,6 +65,9 @@ public class LogicalResultSinkToShortCircuitPointQuery implements RewriteRuleFac
             return false;
         }
         OlapTable olapTable = olapScan.getTable();
+        if (olapTable.hasVariantColumns()) {
+            return false;
+        }
         return olapTable.getEnableLightSchemaChange() && olapTable.getEnableUniqueKeyMergeOnWrite()
                         && olapTable.storeRowColumn();
     }

regression-test/data/point_query_p0/test_point_query.out

@@ -199,3 +199,5 @@ user_guid	feature	sk	feature_value	2021-01-01T00:00
 
 -- !point_select --
 
+-- !sql --
+v1

regression-test/suites/point_query_p0/test_point_query.groovy

@@ -279,8 +279,8 @@ suite("test_point_query", "nonConcurrent") {
             PROPERTIES (
             "replication_allocation" = "tag.location.default: 1",
             "store_row_column" = "true"
-            ); 
-        """                
+            );
+        """
         sql "insert into test_ODS_EBA_LLREPORT(RPTNO) values('567890')"
         sql "select  /*+ SET_VAR(enable_nereids_planner=true) */  substr(RPTNO,2,5) from test_ODS_EBA_LLREPORT where  RPTNO = '567890'"
 
@@ -297,14 +297,14 @@ suite("test_point_query", "nonConcurrent") {
         "enable_unique_key_merge_on_write" = "true",
         "store_row_column" = "true"
         );
-        """                
+        """
         sql """insert into `test_cc_aaaid2` values('1111111')"""
         qt_sql """SELECT
              `__DORIS_DELETE_SIGN__`,
              aaaid
 
             FROM
-             `test_cc_aaaid2` 
+             `test_cc_aaaid2`
             WHERE
              aaaid = '1111111'"""
     } finally {
@@ -333,7 +333,7 @@ suite("test_point_query", "nonConcurrent") {
     explain {
         sql("select * from table_3821461 where col1 = -10 and col2 = 20 and loc3 = 'aabc'")
         contains "SHORT-CIRCUIT"
-    } 
+    }
     qt_sql "select * from table_3821461 where col1 = 10 and col2 = 20 and loc3 = 'aabc';"
     sql "delete from table_3821461 where col1 = 10 and col2 = 20 and loc3 = 'aabc';"
     qt_sql "select * from table_3821461 where col1 = 10 and col2 = 20 and loc3 = 'aabc';"
@@ -419,4 +419,24 @@ suite("test_point_query", "nonConcurrent") {
             assertNotEquals(result1, result2)
         }
     }
-} 
+
+    // test variant type
+    sql "DROP TABLE IF EXISTS test_with_variant"
+    sql """
+    CREATE TABLE `test_with_variant` (
+        `col1` bigint NULL,
+        `col2` variant NULL
+    ) ENGINE=OLAP
+    UNIQUE KEY(`col1`)
+    DISTRIBUTED BY HASH(`col1`) BUCKETS 1
+    PROPERTIES (
+        "replication_allocation" = "tag.location.default: 1",
+        "enable_unique_key_merge_on_write" = "true",
+        "store_row_column" = "true"
+    );
+    """
+    sql """
+        INSERT INTO test_with_variant VALUES(1, '{"k1":"v1", "k2": 200}');
+    """
+    qt_sql "select col2['k1'] from test_with_variant where col1=1"
+}