lokeshj1703 commented on code in PR #9308:
URL: https://github.com/apache/hudi/pull/9308#discussion_r1278900198
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hudi-spark-datasource/hudi-spark-common/src/main/scala/org/apache/hudi/RecordLevelIndexSupport.scala:
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@@ -0,0 +1,108 @@
+package org.apache.hudi
+
+import org.apache.hadoop.fs.FileStatus
+import org.apache.hudi.client.common.HoodieSparkEngineContext
+import org.apache.hudi.common.config.HoodieMetadataConfig
+import org.apache.hudi.common.fs.FSUtils
+import org.apache.hudi.common.model.HoodieRecord.HoodieMetadataField
+import org.apache.hudi.common.table.HoodieTableMetaClient
+import org.apache.hudi.metadata.{HoodieTableMetadata, HoodieTableMetadataUtil}
+import org.apache.hudi.util.JFunction
+import org.apache.spark.api.java.JavaSparkContext
+import org.apache.spark.sql.SparkSession
+import org.apache.spark.sql.catalyst.expressions.{AttributeReference, EqualTo,
Expression, Literal}
+
+import scala.collection.{JavaConverters, mutable}
+
+class RecordLevelIndexSupport(spark: SparkSession,
+ metadataConfig: HoodieMetadataConfig,
+ metaClient: HoodieTableMetaClient) {
+
+ @transient private lazy val engineCtx = new HoodieSparkEngineContext(new
JavaSparkContext(spark.sparkContext))
+ @transient private lazy val metadataTable: HoodieTableMetadata =
+ HoodieTableMetadata.create(engineCtx, metadataConfig,
metaClient.getBasePathV2.toString)
+
+ def getCandidateFiles(allFiles: Seq[FileStatus], queryFilters:
Seq[Expression]): Set[String] = {
+ val (_, recordKeys) = filterQueryFiltersWithRecordKey(queryFilters)
+ val recordKeyLocationsMap =
metadataTable.readRecordIndex(JavaConverters.seqAsJavaListConverter(recordKeys).asJava)
+ val fileIdToPartitionMap: mutable.Map[String, String] = mutable.Map.empty
+ val candidateFiles: mutable.Set[String] = mutable.Set.empty
+ for (location <-
JavaConverters.collectionAsScalaIterableConverter(recordKeyLocationsMap.values()).asScala)
{
+ fileIdToPartitionMap.put(location.getFileId, location.getPartitionPath)
+ }
+ for (file <- allFiles) {
+ val fileId = FSUtils.getFileIdFromFilePath(file.getPath)
+ val partitionOpt = fileIdToPartitionMap.get(fileId)
+ if (partitionOpt.isDefined) {
+ candidateFiles += file.getPath.getName
+ }
+ }
+ candidateFiles.toSet
+ }
+
+ def getRecordKey: Option[String] = {
+ val recordKeysOpt: org.apache.hudi.common.util.Option[Array[String]] =
metaClient.getTableConfig.getRecordKeyFields
+ val recordKeyOpt =
recordKeysOpt.map[String](JFunction.toJavaFunction[Array[String], String](arr =>
+ if (arr.length == 1) {
+ arr(0)
+ } else {
Review Comment:
I am keeping the scope of this PR limited to simple record key. Complex key
support can be added in a separate PR.
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