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Posted to dev@arrow.apache.org by "Ji Liu (JIRA)" <ji...@apache.org> on 2019/08/06 12:00:00 UTC

[jira] [Created] (ARROW-6145) [Java] UnionVector created by MinorType#getNewVector could not keep field type info properly

Ji Liu created ARROW-6145:
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             Summary: [Java] UnionVector created by MinorType#getNewVector could not keep field type info properly
                 Key: ARROW-6145
                 URL: https://issues.apache.org/jira/browse/ARROW-6145
             Project: Apache Arrow
          Issue Type: Bug
          Components: Java
            Reporter: Ji Liu
            Assignee: Ji Liu


When I worked for other items, I found {{UnionVector}} created by {{VectorSchemaRoot#create(Schema schema, BufferAllocator allocator)}} could not keep field type info properly. For example, if we set metadata in {{Field}} in schema, we could not get it back by {{UnionVector#getField}}.

This is mainly because {{MinorType.Union.getNewVector}} did not pass {{FieldType}} to vector and {{UnionVector#getField}} create a new {{Field}} which cause inconsistent.



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