[jira] [Created] (SPARK-8566) lateral view query blows up unless pushed down to a subquery

["Eric Friedman (JIRA)" <ji...@apache.org>]

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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