yabola commented on code in PR #39950:
URL: https://github.com/apache/spark/pull/39950#discussion_r1138487479
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFileFormat.scala:
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@@ -182,6 +186,9 @@ class ParquetFileFormat
val parquetOptions = new ParquetOptions(options,
sparkSession.sessionState.conf)
val datetimeRebaseModeInRead = parquetOptions.datetimeRebaseModeInRead
val int96RebaseModeInRead = parquetOptions.int96RebaseModeInRead
+ // whether read the complete row groups in advance (filter the row groups
later if need)
+ // this can avoid reading the footer twice (currently only optimize for
vectorized read)
+ val readRowGroupsEarly = enableVectorizedReader
Review Comment:
now only optimize for vectorized read.
non-vectorized reader use api
`org.apache.hadoop.mapreduce.RecordReader#initialize` , I can't pass the footer
parameter.
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