Qi Chen
bad22dd4e2
[Fix](orc-reader) Fix orc dict filter null value issue in _convert_dict_cols_to_string_cols which caused incorrect result. (#21047)
Query results should not have empty values.
```
use regresssion.multi_catalog;
select commit_id from github_events_orc WHERE (event_type = 'CommitCommentEvent') AND commit_id != "" limit 10;
```
```
+------------------------------------------+
| commit_id |
+------------------------------------------+
| 685c1fd8dbbdc10c042932f9a9f88be00ff96c75 |
| 685c1fd8dbbdc10c042932f9a9f88be00ff96c75 |
| 4e3ab2ff2d2474f5d51334b9b0fdf17e9845a166 |
| |
| |
| |
| |
| |
| |
| 7191c20cb49da07a7fc16aa32dc0de4faff528b2 |
+------------------------------------------+
10 rows in set (0.54 sec)
```
2023-06-21 14:54:01 +08:00
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