Ganesha Shreedhara created HIVE-21492:
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Summary: VectorizedParquetRecordReader can't to read parquet file
generated using thrift
Key: HIVE-21492
URL: https://issues.apache.org/jira/browse/HIVE-21492
Project: Hive
Issue Type: Bug
Reporter: Ganesha Shreedhara
Assignee: Ganesha Shreedhara
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 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|https://issues.apache.org/jira/browse/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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