Review Request 31200: DRILL-2197: Fix no applicable constructor error in outer join with a map type

[Parth Chandra <pc...@maprtech.com>]

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Review request for drill, Hanifi Gunes and Mehant Baid.


Repository: drill-git


Description
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Problem occurs because the left join requires the output type of the columns to be nullable and map types are not nullable. So the TypeHelper class creates a default type (in this cas NullableTinyInt) and that cause the runtime generated code to not compile.


Diffs
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  exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinBatch.java dae8a03 
  exec/java-exec/src/test/java/org/apache/drill/exec/physical/impl/join/TestJoinComplex.java PRE-CREATION 
  exec/java-exec/src/test/resources/join/DRILL-2197-result-1.json PRE-CREATION 
  exec/java-exec/src/test/resources/join/DRILL-2197-result-2.json PRE-CREATION 
  exec/java-exec/src/test/resources/join/complex_1.json PRE-CREATION 
  exec/java-exec/src/test/resources/join/complex_2.json PRE-CREATION 

Diff: https://reviews.apache.org/r/31200/diff/


Testing
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Added new units tests for left join queries returning a map type.


Thanks,

Parth Chandra