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https://issues.apache.org/jira/browse/HIVE-21987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marta Kuczora updated HIVE-21987:
---------------------------------
Attachment: HIVE-21987.4.patch
> Hive is unable to read Parquet int32 annotated with decimal
> -----------------------------------------------------------
>
> Key: HIVE-21987
> URL: https://issues.apache.org/jira/browse/HIVE-21987
> Project: Hive
> Issue Type: Improvement
> Reporter: Nandor Kollar
> Assignee: Marta Kuczora
> Priority: Major
> Attachments: HIVE-21987.1.patch, HIVE-21987.2.patch,
> HIVE-21987.3.patch, HIVE-21987.4.patch,
> part-00000-e5287735-8dcf-4dda-9c6e-4d5c98dc15f2-c000.snappy.parquet
>
>
> When I tried to read a Parquet file from a Hive (with Tez execution engine)
> table with a small decimal column, I got the following exception:
> {code}
> Caused by: java.lang.UnsupportedOperationException:
> org.apache.hadoop.hive.ql.io.parquet.convert.ETypeConverter$8$1
> at
> org.apache.parquet.io.api.PrimitiveConverter.addInt(PrimitiveConverter.java:98)
> at
> org.apache.parquet.column.impl.ColumnReaderImpl$2$3.writeValue(ColumnReaderImpl.java:248)
> at
> org.apache.parquet.column.impl.ColumnReaderImpl.writeCurrentValueToConverter(ColumnReaderImpl.java:367)
> at
> org.apache.parquet.io.RecordReaderImplementation.read(RecordReaderImplementation.java:406)
> at
> org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:226)
> ... 28 more
> {code}
> Steps to reproduce:
> - Create a Hive table with a single decimal(4, 2) column
> - Create a Parquet file with int32 column annotated with decimal(4, 2)
> logical type, put it into the previously created table location (or use the
> attached parquet file, in this case the column should be named as 'd', to
> match the Hive schema with the Parquet schema in the file)
> - Execute a {{select *}} on this table
> Also, I'm afraid that similar problems can happen with int64 decimals too.
> [Parquet specification |
> https://github.com/apache/parquet-format/blob/master/LogicalTypes.md] allows
> both of these cases.
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