pengzhiwei2018 commented on a change in pull request #2893:
URL: https://github.com/apache/hudi/pull/2893#discussion_r640377103
##########
File path:
hudi-spark-datasource/hudi-spark/src/main/scala/org/apache/hudi/HoodieFileIndex.scala
##########
@@ -151,13 +184,33 @@ case class HoodieFileIndex(
metaClient.reloadActiveTimeline()
val activeInstants =
metaClient.getActiveTimeline.getCommitsTimeline.filterCompletedInstants
fileSystemView = new HoodieTableFileSystemView(metaClient, activeInstants,
allFiles)
- cachedAllInputFiles =
fileSystemView.getLatestBaseFiles.iterator().asScala.toArray
- cachedAllPartitionPaths = partitionFiles.keys.toSeq
- cachedFileSize = cachedAllInputFiles.map(_.getFileLen).sum
+
+ (tableType, queryType) match {
+ case (MERGE_ON_READ, QUERY_TYPE_SNAPSHOT_OPT_VAL) =>
+ // Fetch and store latest base and log files, and their sizes
+ cachedAllInputFiles = partitionFiles.map(p => {
+ val latestSlices =
fileSystemView.getLatestMergedFileSlicesBeforeOrOn(p._1.partitionPath,
activeInstants.lastInstant().get().getTimestamp)
Review comment:
If there is no commit success yet, `activeInstants.lastInstant().get()`
may lead to query crash. So we'd better to return empty file list.
##########
File path:
hudi-spark-datasource/hudi-spark/src/main/scala/org/apache/hudi/HoodieFileIndex.scala
##########
@@ -107,34 +113,61 @@ case class HoodieFileIndex(
}
@transient @volatile private var fileSystemView: HoodieTableFileSystemView =
_
- @transient @volatile private var cachedAllInputFiles: Array[HoodieBaseFile]
= _
+ @transient @volatile private var cachedAllInputFiles: Map[PartitionRowPath,
Map[HoodieBaseFile, Seq[HoodieLogFile]]] = _
@transient @volatile private var cachedFileSize: Long = 0L
- @transient @volatile private var cachedAllPartitionPaths:
Seq[PartitionRowPath] = _
@volatile private var queryAsNonePartitionedTable: Boolean = _
refresh0()
override def rootPaths: Seq[Path] = queryPath :: Nil
+ /**
+ * Invoked by Spark to fetch list of latest base files per partition.
+ *
+ * @param partitionFilters partition column filters
+ * @param dataFilters data columns filters
+ * @return list of PartitionDirectory containing partition to base files
mapping
+ */
override def listFiles(partitionFilters: Seq[Expression],
dataFilters: Seq[Expression]):
Seq[PartitionDirectory] = {
if (queryAsNonePartitionedTable) { // Read as Non-Partitioned table.
Seq(PartitionDirectory(InternalRow.empty, allFiles))
} else {
// Prune the partition path by the partition filters
- val prunedPartitions = prunePartition(cachedAllPartitionPaths,
partitionFilters)
+ val prunedPartitions = prunePartition(cachedAllInputFiles.keys.toSeq,
partitionFilters)
prunedPartitions.map { partition =>
- val fileStatues =
fileSystemView.getLatestBaseFiles(partition.partitionPath).iterator()
Review comment:
No! We will cache the `files` in the `fileSystemView`. So each call of
`listFiles` will reuse the cache values.
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