Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19769#discussion_r151549968
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFileFormat.scala
---
@@ -355,9 +361,31 @@ class ParquetFileFormat
fileSplit.getLocations,
null)
+ // PARQUET_INT96_TIMESTAMP_CONVERSION says to apply timezone
conversions to int96 timestamps'
+ // *only* if the file was created by something other than
"parquet-mr", so check the actual
+ // writer here for this file. We have to do this per-file, as each
file in the table may
+ // have different writers. Sadly, this also means we have to clone
the hadoopConf, as
+ // different threads may want different values. We have to use the
hadoopConf as its
+ // our only way to pass value to ParquetReadSupport.init
+ val localHadoopConf =
--- End diff --
This code is run at executor side, we don't need to use `hadoopConf` to
carry the config, we can just pass a boolean flag when creating the parquet
reader, e.g. `new VectorizedParquetRecordReader(timeZoneToAdjust)`
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