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https://issues.apache.org/jira/browse/DRILL-1997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacques Nadeau resolved DRILL-1997.
-----------------------------------
Resolution: Not a Problem
Hive needs to tag Parquet file with UTF8 type for Drill to know.
> Hive generated parquet files with maps containing strings return wrong value
> ----------------------------------------------------------------------------
>
> Key: DRILL-1997
> URL: https://issues.apache.org/jira/browse/DRILL-1997
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Parquet
> Reporter: Ramana Inukonda Nagaraj
> Assignee: Parth Chandra
> Priority: Critical
> Attachments: hive_alltypes.parquet
>
>
> Created a parquet file in hive having the following DDL
> hive> desc alltypesparquet;
> OK
> c1 int
> c2 boolean
> c3 double
> c4 string
> c5 array<int>
> c6 map<int,string>
> c7 map<string,string>
> c8 struct<r:string,s:int,t:double>
> c9 tinyint
> c10 smallint
> c11 float
> c12 bigint
> c13 array<array<string>>
> c15 struct<r:int,s:struct<a:int,b:string>>
>
> c16 array<struct<m:map<string,string>,n:int>>
>
> Time taken: 0.076 seconds, Fetched: 15 row(s)
> All the complex types with string in them are returning incorrect values in
> drill. For example:
> hive> select c6 from alltypesparquet;
> NULL
> NULL
> {1:"x",2:"y"}
> 0: jdbc:drill:> select c6 from `/user/hive/warehouse/alltypesparquet`;
> +------------+
> | c6 |
> +------------+
> | {"map":[]} |
> | {"map":[]} |
> | {"map":[{"key":1,"value":"eA=="},{"key":2,"value":"eQ=="}]} |
> +------------+
> 3 rows selected (0.077 seconds)
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