fix example1 query error

[javeme]

Change-Id: I0410c64be5a2ccec2f81a94e6620517a87cf2d7d

[codecov]

Codecov Report

Merging #638 into master will increase coverage by 2.92%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #638      +/-   ##
============================================
+ Coverage     69.46%   72.38%   +2.92%     
- Complexity     3629     3740     +111     
============================================
  Files           218      218              
  Lines         17296    17296              
  Branches       2437     2437              
============================================
+ Hits          12014    12520     +506     
+ Misses         4050     3495     -555     
- Partials       1232     1281      +49

Impacted Files	Coverage Δ	Complexity Δ
...hugegraph/backend/serializer/BinarySerializer.java	81.16% <100%> (+0.17%)	99 <0> (ø)	⬇️
...gegraph/backend/serializer/AbstractSerializer.java	78.94% <100%> (ø)	9 <0> (ø)	⬇️
...du/hugegraph/backend/tx/GraphIndexTransaction.java	80.72% <0%> (+0.41%)	166% <0%> (ø)	⬇️
...du/hugegraph/backend/store/BackendSessionPool.java	82.14% <0%> (+5.35%)	15% <0%> (+1%)	⬆️
...om/baidu/hugegraph/backend/store/BackendTable.java	92% <0%> (+6%)	12% <0%> (ø)	⬇️
...u/hugegraph/backend/store/hbase/HbaseSessions.java	67.82% <0%> (+67.82%)	24% <0%> (+24%)	⬆️
...aidu/hugegraph/backend/store/hbase/HbaseStore.java	78.04% <0%> (+78.04%)	29% <0%> (+29%)	⬆️
...u/hugegraph/backend/store/hbase/HbaseFeatures.java	82.35% <0%> (+82.35%)	14% <0%> (+14%)	⬆️
...aidu/hugegraph/backend/store/hbase/HbaseTable.java	82.85% <0%> (+82.85%)	36% <0%> (+36%)	⬆️
... and 3 more

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