Apply kou suggestion.

Author: andishgar

cpp/src/arrow/array/statistics_test.cc

@@ -33,12 +33,12 @@ TEST(TestArrayStatistics, NullCountExact) {
   ASSERT_EQ(29, std::get<int64_t>(statistics.null_count.value()));
 }
 
-TEST(TestArrayStatistics, NullCountAprroximate) {
+TEST(TestArrayStatistics, NullCountApproximate) {
   ArrayStatistics statistics;
   ASSERT_FALSE(statistics.null_count.has_value());
   statistics.null_count = 29.0;
   ASSERT_TRUE(statistics.null_count.has_value());
-  ASSERT_EQ(29.0, std::get<double>(statistics.null_count.value()));
+  ASSERT_DOUBLE_EQ(29.0, std::get<double>(statistics.null_count.value()));
 }
 
 TEST(TestArrayStatistics, DistinctCountExact) {

cpp/src/arrow/record_batch.cc

@@ -541,14 +541,13 @@ Status EnumerateStatistics(const RecordBatch& record_batch, OnStatistics on_stat
         statistics.type = int64();
         statistics.value = std::get<int64_t>(column_statistics->null_count.value());
         RETURN_NOT_OK(on_statistics(statistics));
-        statistics.start_new_column = false;
       } else {
         statistics.key = ARROW_STATISTICS_KEY_NULL_COUNT_APPROXIMATE;
         statistics.type = float64();
         statistics.value = std::get<double>(column_statistics->null_count.value());
         RETURN_NOT_OK(on_statistics(statistics));
-        statistics.start_new_column = false;
       }
+      statistics.start_new_column = false;
     }
 
     if (column_statistics->distinct_count.has_value()) {