fix: within condition always use empty values

[imbajin]

No description provided.

[codecov]

Codecov Report

Merging #1704 (d9f6a4e) into master (68e3467) will increase coverage by 0.33%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #1704      +/-   ##
============================================
+ Coverage     66.82%   67.16%   +0.33%     
- Complexity     7068     7089      +21     
============================================
  Files           420      420              
  Lines         34726    34726              
  Branches       4822     4822              
============================================
+ Hits          23206    23324     +118     
+ Misses         9178     9057     -121     
- Partials       2342     2345       +3     

Impacted Files	Coverage Δ
...du/hugegraph/traversal/optimize/TraversalUtil.java	62.60% <0.00%> (ø)
...va/com/baidu/hugegraph/task/ServerInfoManager.java	71.34% <0.00%> (-2.25%)	⬇️
...a/com/baidu/hugegraph/backend/query/Condition.java	79.42% <0.00%> (-0.37%)	⬇️
...baidu/hugegraph/backend/store/mysql/MysqlUtil.java	96.61% <0.00%> (+3.38%)	⬆️
...aidu/hugegraph/backend/store/mysql/MysqlTable.java	81.59% <0.00%> (+5.76%)	⬆️
...u/hugegraph/backend/store/mysql/MysqlSessions.java	68.42% <0.00%> (+10.52%)	⬆️
...idu/hugegraph/backend/store/mysql/MysqlTables.java	89.67% <0.00%> (+13.16%)	⬆️
...aidu/hugegraph/backend/store/mysql/MysqlStore.java	81.72% <0.00%> (+17.76%)	⬆️
...egraph/backend/store/mysql/MysqlStoreProvider.java	100.00% <0.00%> (+66.66%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 68e3467...d9f6a4e. Read the comment docs.