[fix](bitmap_intersect) fix bitmap_intersect result error (#13298)

be/src/exprs/bitmap_function.cpp

@@ -104,7 +104,8 @@ void BitmapFunctions::bitmap_intersect(FunctionContext* ctx, const StringVal& sr
     if (UNLIKELY(dst->ptr == nullptr)) {
         dst->is_null = false;
         dst->len = sizeof(BitmapValue);
-        dst->ptr = (uint8_t*)new BitmapValue((char*)src.ptr);
+        dst->ptr = (uint8_t*)new BitmapValue();
+        BitmapFunctions::bitmap_union(ctx, src, dst);
         return;
     }
     auto dst_bitmap = reinterpret_cast<BitmapValue*>(dst->ptr);

regression-test/data/query_p0/sql_functions/aggregate_functions/test_aggregate_all_functions.out

@@ -11,6 +11,16 @@ xian	100.0
 beijing	100.0
 xian	100.0
 
+-- !bitmap_intersect --
+20220201	10001
+20220202	10001
+20220203	10000,10001
+
+-- !bitmap_intersect --
+20220201	10001
+20220202	10001
+20220203	10000,10001
+
 -- !select4 --
 3
 

regression-test/suites/query_p0/sql_functions/aggregate_functions/test_aggregate_all_functions.groovy

@@ -103,6 +103,12 @@ suite("test_aggregate_all_functions") {
     sql "insert into ${tableName_03} select dt,page,to_bitmap(user_id_int) user_id from ${tableName_04}"
     sql "insert into ${tableName_03} select dt,page,bitmap_hash(user_id_str) user_id from ${tableName_04}"
 
+    sql "set enable_vectorized_engine = false"
+    qt_bitmap_intersect "select dt, bitmap_to_string(bitmap_intersect(user_id_bitmap)) from ${tableName_04} group by dt order by dt"
+
+    sql "set enable_vectorized_engine = true"
+    qt_bitmap_intersect "select dt, bitmap_to_string(bitmap_intersect(user_id_bitmap)) from ${tableName_04} group by dt order by dt"
+
     qt_select4 "select bitmap_union_count(user_id) from  ${tableName_03}"
     qt_select5 "select bitmap_count(bitmap_union(user_id)) FROM ${tableName_03}"