eldenmoon commented on code in PR #10498:
URL: https://github.com/apache/doris/pull/10498#discussion_r909582692
##########
be/src/vec/sink/mysql_result_writer.cpp:
##########
@@ -136,7 +136,13 @@ Status VMysqlResultWriter::_add_one_column(const
ColumnPtr& column_ptr,
if (data->is_null_at(j)) {
buf_ret = _buffer.push_string("NULL", strlen("NULL"));
} else {
- buf_ret = _add_one_cell(data, j, nested_type_ptr, _buffer);
+ if
(WhichDataType(remove_nullable(nested_type_ptr)).is_string()) {
+ buf_ret = _buffer.push_string("'", 1);
+ buf_ret = _add_one_cell(data, j, nested_type_ptr,
_buffer);
Review Comment:
```
mysql> set enable_vectorized_engine = true;
mysql> select k3 from test_array_string order by k2 limit 1;
+----------------------------------------------+
| k3 |
+----------------------------------------------+
| ['cdsdasd', 'xxxx', '3', '4', '5', NULL] |
+----------------------------------------------+
```
here is an example of nested data is null
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