Eric Friedman created SPARK-8566:
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Summary: lateral view query blows up unless pushed down to a
subquery
Key: SPARK-8566
URL: https://issues.apache.org/jira/browse/SPARK-8566
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.4.0
Reporter: Eric Friedman
I have a query which works in Hive but not in SparkSQL against the same Hive
metastore unless I introduce a subquery:
select col from table
lateral view explode(map_keys(col_map)) t1 as col
parquet.io.ParquetDecodingException: Can not read value at 0 in block -1 in
file hdfs://nameservice1/path/to/parquet.gz
at
parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:213)
at
parquet.hadoop.ParquetRecordReader.nextKeyValue(ParquetRecordReader.java:204)
at
org.apache.spark.sql.sources.SqlNewHadoopRDD$$anon$1.hasNext(SqlNewHadoopRDD.scala:163)
at
org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39)
but if I rewrite it like so, it works:
select col from (select map_keys(col_map) keys from table) t2 lateral view
explode(t2.keys) t1 as col
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