When computing partition for non-parquet relation, `HadoopRDD.compute` is used. but it does not set the thread local variable `inputFileName` in `NewSqlHadoopRDD`, like `NewSqlHadoopRDD.compute` does.. Yet, when getting the `inputFileName`, `NewSqlHadoopRDD.inputFileName` is exptected, which is empty now.
Adding the setting inputFileName in HadoopRDD.compute resolves this issue.
Author: xin Wu <xinwu@us.ibm.com>
Closes#9542 from xwu0226/SPARK-11522.
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