Bing Li created HIVE-11201:
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             Summary: HCatalog  is ignoring user specified avro schema in the 
table definition
                 Key: HIVE-11201
                 URL: https://issues.apache.org/jira/browse/HIVE-11201
             Project: Hive
          Issue Type: Bug
          Components: HCatalog
    Affects Versions: 1.2.0
            Reporter: Bing Li
            Assignee: Bing Li
            Priority: Critical


HCatalog  is ignoring user specified avro schema in the table definition , 
instead generating its own avro based  from hive meta store. 

By generating its own schema  will result in mismatch names.  For exmple Avro 
fields name are Case Sensitive.  By generating it's own schema will  result in 
incorrect schema written to the avro file , and result   select fail on read.   
And also Even if user specified schema does not allow null ,  when data is 
written using Hcatalog , it will write a schema that will allow null. 

For example in the table ,  user specified , all CAPITAL letters in the schema 
, and record name as LINEITEM.  The schema should be written as it is.  Instead 
Hcatalog ignores it and generated its own avro schema from the hive table case. 



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