Copilot commented on code in PR #59599:
URL: https://github.com/apache/doris/pull/59599#discussion_r2791911969


##########
regression-test/suites/cloud_p0/different_serialize/different_serialize.groovy:
##########
@@ -46,36 +46,22 @@ suite ("different_serialize_cloud") {
 
     sql "insert into d_table select -4,4,-4,'d';"
     sql "insert into d_table(k4,k2) values('d',4);"
+    sql "insert into d_table(k4,k2) values('d',3);"
+    sql "insert into d_table(k4,k2) values('b',3);"
 
-    qt_select_star "select * from d_table order by k1;"
+    qt_select_star "select * from d_table order by 1,2,3,4;"
 
-    explain {
-        sql("select k1,bitmap_to_string(bitmap_agg(k2)) from d_table group by 
k1 order by 1;")
-        contains "(mv1)"
-    }
+    mv_rewrite_success("select k1,bitmap_to_string(bitmap_agg(k2)) from 
d_table group by k1 order by 1;", "mv1")
     qt_select_mv "select k1,bitmap_to_string(bitmap_agg(k2)) from d_table 
group by k1 order by 1;"
 
-    explain {
-        sql("select k1,bitmap_to_string(bitmap_intersect(to_bitmap(k2))) from 
d_table group by k1 order by 1;")
-        contains "(mv1_1)"
-    }
+    mv_rewrite_success("select 
k1,bitmap_to_string(bitmap_intersect(to_bitmap(k2))) from d_table group by k1 
order by 1;", "mv1_1")
     qt_select_mv "select k1,bitmap_to_string(bitmap_intersect(to_bitmap(k2))) 
from d_table group by k1 order by 1;"
 
     explain {
-        sql("select 
k1,array_sort(map_keys(map_agg(k2,k3))),array_sortby(map_values(map_agg(k2,k3)),map_keys(map_agg(k2,k3)))
 from d_table group by k1 order by 1;")
+        sql("select k1,map_agg(k2,k3) from d_table group by k1 order by 1;")
         contains "(mv2)"
     }
     qt_select_mv "select 
k1,array_sort(map_keys(map_agg(k2,k3))),array_sortby(map_values(map_agg(k2,k3)),map_keys(map_agg(k2,k3)))
 from d_table group by k1 order by 1;"

Review Comment:
   The `explain` check for `mv2` is now run against `select k1, map_agg(k2,k3) 
...`, but the actual query being validated (`qt_select_mv` right after) is 
`map_keys/map_values` with sorting. This weakens the test because it no longer 
verifies that the *executed* query is rewritten using `mv2`. Consider updating 
the `explain`/`mv_rewrite_success` assertion to use the same SQL as the 
`qt_select_mv` statement (or change the `qt_select_mv` SQL to match what you 
want to validate).



##########
regression-test/suites/cloud_p0/different_serialize/different_serialize.groovy:
##########
@@ -93,4 +79,17 @@ suite ("different_serialize_cloud") {
         contains "(mv5)"
     }
     qt_select_mv "select k1,collect_set(k2,3) from d_table group by k1 order 
by 1;"
+
+    sql "insert into d_table select 1,1,1,'a';"
+    sql "insert into d_table select 1,2,1,'a';"
+
+    mv_rewrite_success("select k1,bitmap_count(bitmap_agg(k2)) from d_table 
group by k1 order by 1;", "mv1")
+    qt_select_mv "select k1,bitmap_count(bitmap_agg(k2)) from d_table group by 
k1 order by 1;"
+
+    mv_rewrite_success("select k1, multi_distinct_sum(k3) from d_table group 
by k1 order by k1;", "mv1_3")
+    qt_select_mv "select k1, multi_distinct_sum(k3) from d_table group by k1 
order by k1;"
+
+    mv_rewrite_success("select k1, multi_distinct_group_concat(k4) from 
d_table group by k1 order by k1;", "mv1_2")
+    qt_select_mv "select k1, multi_distinct_group_concat(k4) from d_table 
group by k1 order by k1;"

Review Comment:
   `mv_rewrite_success` is asserting rewrite to `mv1_3` and `mv1_2`, but this 
suite never creates those materialized views (only `mv1`, `mv1_1`, `mv2`-`mv5` 
are created above). This will make the test fail or become dependent on 
leftover state. Add the missing `createMV` statements (or change the rewrite 
assertions to target an MV that actually exists in this suite).



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