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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