possible bug: impossible to both be null and be SQLIntegerExpr

[XenoAmess]

No description provided.

[codecov-commenter]

Codecov Report

Base: 58.94% // Head: 58.94% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (548b096) compared to base (d92126a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #4514   +/-   ##
=========================================
  Coverage     58.94%   58.94%           
  Complexity    26910    26910           
=========================================
  Files          1268     1268           
  Lines        122755   122753    -2     
  Branches      23123    23122    -1     
=========================================
+ Hits          72355    72357    +2     
+ Misses        41381    41378    -3     
+ Partials       9019     9018    -1     

Impacted Files	Coverage Δ
...a/druid/sql/ast/statement/SQLSelectQueryBlock.java	39.58% <ø> (+0.09%)	⬆️
.../com/alibaba/druid/support/ibatis/IbatisUtils.java	52.83% <0.00%> (-1.89%)	⬇️
...n/java/com/alibaba/druid/pool/DruidDataSource.java	72.03% <0.00%> (+0.04%)	⬆️
.../main/java/com/alibaba/druid/stat/JdbcSqlStat.java	82.94% <0.00%> (+0.46%)	⬆️

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