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Posted to dev@hive.apache.org by "Tongjie Chen (JIRA)" <ji...@apache.org> on 2014/03/31 21:14:14 UTC
[jira] [Created] (HIVE-6794) select * from parquet hive table
containing map columns runs into exception
Tongjie Chen created HIVE-6794:
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Summary: select * from parquet hive table containing map columns runs into exception
Key: HIVE-6794
URL: https://issues.apache.org/jira/browse/HIVE-6794
Project: Hive
Issue Type: Bug
Components: File Formats, Serializers/Deserializers
Affects Versions: 0.13.0
Reporter: Tongjie Chen
select * from parquet hive table containing map columns run into exception "FAILED: RuntimeException java.lang.ClassCastException: parquet.hive.serde.DeepParquetHiveMapInspector cannot be cast to parquet.hive.serde.StandardParquetHiveMapInspector"
To reproduce, use the following steps (both regular_map_table and parquet_map_table contains schema "c1 , c2 int"):
hive> insert overwrite table parquet_map_table select * from regular_map_table;
hive> select * from parquet_map_table; (the first query to select * works fine )
OK
{"key1":"value1"} 1
{"key2":"value2"} 2
{"key3":"value3"} 3
Time taken: 2.669 seconds, Fetched: 3 row(s)
hive> select * from parquet_map_table; (the second and all subsequent exact same query breaks)
FAILED: RuntimeException java.lang.ClassCastException: parquet.hive.serde.DeepParquetHiveMapInspector cannot be cast to parquet.hive.serde.StandardParquetHiveMapInspector
Interestingly "select c1 from parquet_map_column" query works fine though.
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