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https://issues.apache.org/jira/browse/HIVE-21492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ferdinand Xu updated HIVE-21492:
--------------------------------
Component/s: Parquet
> VectorizedParquetRecordReader can't to read parquet file generated using
> thrift/custom tool
> -------------------------------------------------------------------------------------------
>
> Key: HIVE-21492
> URL: https://issues.apache.org/jira/browse/HIVE-21492
> Project: Hive
> Issue Type: Bug
> Components: Parquet
> Reporter: Ganesha Shreedhara
> Assignee: Ganesha Shreedhara
> Priority: Major
> Fix For: 4.0.0
>
> Attachments: HIVE-21492.2.patch, HIVE-21492.3.patch,
> HIVE-21492.4.patch, HIVE-21492.5.patch, HIVE-21492.patch
>
>
> Taking an example of a parquet table having array of integers as below.
> {code:java}
> CREATE EXTERNAL TABLE ( list_of_ints` array<int>)
> STORED AS PARQUET
> LOCATION '{location}';
> {code}
> Parquet file generated using hive will have schema for Type as below:
> {code:java}
> group list_of_ints (LIST) { repeated group bag { optional int32 array;\n};\n}
> {code}
> Parquet file generated using thrift or any custom tool (using
> org.apache.parquet.io.api.RecordConsumer)
> may have schema for Type as below:
> {code:java}
> required group list_of_ints (LIST) { repeated int32 list_of_tuple} {code}
> VectorizedParquetRecordReader handles only parquet file generated using hive.
> It throws the following exception when parquet file generated using thrift is
> read because of the changes done as part of HIVE-18553 .
> {code:java}
> Caused by: java.lang.ClassCastException: repeated int32 list_of_ints_tuple is
> not a group
> at org.apache.parquet.schema.Type.asGroupType(Type.java:207)
> at
> org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.getElementType(VectorizedParquetRecordReader.java:479)
> at
> org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.buildVectorizedParquetReader(VectorizedParquetRecordReader.java:532)
> at
> org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.checkEndOfRowGroup(VectorizedParquetRecordReader.java:440)
> at
> org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.nextBatch(VectorizedParquetRecordReader.java:401)
> at
> org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.next(VectorizedParquetRecordReader.java:353)
> at
> org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.next(VectorizedParquetRecordReader.java:92)
> at
> org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.doNext(HiveContextAwareRecordReader.java:365){code}
>
> I have done a small change to handle the case where the child type of group
> type can be PrimitiveType.
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