skip check for ColumnVariant

Author: Mryange

be/src/vec/columns/column.cpp

@@ -26,6 +26,7 @@
 #include "vec/columns/column_map.h"
 #include "vec/columns/column_nullable.h"
 #include "vec/columns/column_struct.h"
+#include "vec/columns/column_variant.h"
 #include "vec/core/sort_block.h"
 #include "vec/data_types/data_type.h"
 
@@ -93,6 +94,11 @@ bool IColumn::null_map_check() const {
 }
 
 bool IColumn::complex_type_data_nullable_check() const {
+    if (check_and_get_column<ColumnVariant>(*this)) {
+        // skip check for ColumnVariant
+        return true;
+    }
+
     auto check_complex_data_is_nullable = [&](const IColumn& subcolumn) {
         if (const auto* col_arr = check_and_get_column<ColumnArray>(subcolumn)) {
             const auto& data_col = col_arr->get_data();