jonvex commented on code in PR #11413: URL: https://github.com/apache/hudi/pull/11413#discussion_r1631710563
########## hudi-client/hudi-spark-client/src/main/scala/org/apache/hudi/SparkFileFormatInternalRowReaderContext.scala: ########## @@ -116,45 +143,154 @@ class SparkFileFormatInternalRowReaderContext(parquetFileReader: SparkParquetRea skeletonRequiredSchema: Schema, dataFileIterator: ClosableIterator[InternalRow], dataRequiredSchema: Schema): ClosableIterator[InternalRow] = { - doBootstrapMerge(skeletonFileIterator.asInstanceOf[ClosableIterator[Any]], - dataFileIterator.asInstanceOf[ClosableIterator[Any]]) + doBootstrapMerge(skeletonFileIterator.asInstanceOf[ClosableIterator[Any]], skeletonRequiredSchema, + dataFileIterator.asInstanceOf[ClosableIterator[Any]], dataRequiredSchema) } - protected def doBootstrapMerge(skeletonFileIterator: ClosableIterator[Any], dataFileIterator: ClosableIterator[Any]): ClosableIterator[InternalRow] = { - new ClosableIterator[Any] { - val combinedRow = new JoinedRow() + private def doBootstrapMerge(skeletonFileIterator: ClosableIterator[Any], + skeletonRequiredSchema: Schema, + dataFileIterator: ClosableIterator[Any], + dataRequiredSchema: Schema): ClosableIterator[InternalRow] = { + if (supportsPositionField()) { + assert(AvroSchemaUtils.containsFieldInSchema(skeletonRequiredSchema, ROW_INDEX_TEMPORARY_COLUMN_NAME)) + assert(AvroSchemaUtils.containsFieldInSchema(dataRequiredSchema, ROW_INDEX_TEMPORARY_COLUMN_NAME)) + val rowIndexColumn = new java.util.HashSet[String]() + rowIndexColumn.add(ROW_INDEX_TEMPORARY_COLUMN_NAME) + //always remove the row index column from the skeleton because the data file will also have the same column + val skeletonProjection = projectRecord(skeletonRequiredSchema, + AvroSchemaUtils.removeFieldsFromSchema(skeletonRequiredSchema, rowIndexColumn)) - override def hasNext: Boolean = { - //If the iterators are out of sync it is probably due to filter pushdown - checkState(dataFileIterator.hasNext == skeletonFileIterator.hasNext, - "Bootstrap data-file iterator and skeleton-file iterator have to be in-sync!") - dataFileIterator.hasNext && skeletonFileIterator.hasNext + //If we need to do position based merging with log files we will leave the row index column at the end + val dataProjection = if (getHasLogFiles && getUseRecordPosition) { + getIdentityProjection + } else { + projectRecord(dataRequiredSchema, + AvroSchemaUtils.removeFieldsFromSchema(dataRequiredSchema, rowIndexColumn)) } - override def next(): Any = { - (skeletonFileIterator.next(), dataFileIterator.next()) match { - case (s: ColumnarBatch, d: ColumnarBatch) => - val numCols = s.numCols() + d.numCols() - val vecs: Array[ColumnVector] = new Array[ColumnVector](numCols) - for (i <- 0 until numCols) { - if (i < s.numCols()) { - vecs(i) = s.column(i) + //Always use internal row for positional merge because + //we need to iterate row by row when merging + new CachingIterator[InternalRow] { + val combinedRow = new JoinedRow() + + //position column will always be at the end of the row + private def getPos(row: InternalRow): Long = { + row.getLong(row.numFields-1) + } + + private def getNextSkeleton: (InternalRow, Long) = { + val nextSkeletonRow = skeletonFileIterator.next().asInstanceOf[InternalRow] + (nextSkeletonRow, getPos(nextSkeletonRow)) + } + + private def getNextData: (InternalRow, Long) = { + val nextDataRow = dataFileIterator.next().asInstanceOf[InternalRow] + (nextDataRow, getPos(nextDataRow)) + } + + override def close(): Unit = { + skeletonFileIterator.close() + dataFileIterator.close() + } + + override protected def doHasNext(): Boolean = { + if (!dataFileIterator.hasNext || !skeletonFileIterator.hasNext) { + false + } else { + var nextSkeleton = getNextSkeleton + var nextData = getNextData + while (nextSkeleton._2 != nextData._2) { + if (nextSkeleton._2 > nextData._2) { + if (!dataFileIterator.hasNext) { + return false + } else { + nextData = getNextData + } } else { - vecs(i) = d.column(i - s.numCols()) + if (!skeletonFileIterator.hasNext) { + return false + } else { + nextSkeleton = getNextSkeleton + } } } - assert(s.numRows() == d.numRows()) - sparkAdapter.makeColumnarBatch(vecs, s.numRows()) - case (_: ColumnarBatch, _: InternalRow) => throw new IllegalStateException("InternalRow ColumnVector mismatch") - case (_: InternalRow, _: ColumnarBatch) => throw new IllegalStateException("InternalRow ColumnVector mismatch") - case (s: InternalRow, d: InternalRow) => combinedRow(s, d) + nextRecord = combinedRow(skeletonProjection.apply(nextSkeleton._1), dataProjection.apply(nextData._1)) + true + } } } + } else { + new ClosableIterator[Any] { + val combinedRow = new JoinedRow() - override def close(): Unit = { - skeletonFileIterator.close() - dataFileIterator.close() - } - }.asInstanceOf[ClosableIterator[InternalRow]] + override def hasNext: Boolean = { + //If the iterators are out of sync it is probably due to filter pushdown + checkState(dataFileIterator.hasNext == skeletonFileIterator.hasNext, + "Bootstrap data-file iterator and skeleton-file iterator have to be in-sync!") + dataFileIterator.hasNext && skeletonFileIterator.hasNext + } + + override def next(): Any = { + (skeletonFileIterator.next(), dataFileIterator.next()) match { + case (s: ColumnarBatch, d: ColumnarBatch) => + //This will not be used until [HUDI-7693] is implemented + val numCols = s.numCols() + d.numCols() + val vecs: Array[ColumnVector] = new Array[ColumnVector](numCols) + for (i <- 0 until numCols) { + if (i < s.numCols()) { + vecs(i) = s.column(i) + } else { + vecs(i) = d.column(i - s.numCols()) + } + } + assert(s.numRows() == d.numRows()) + sparkAdapter.makeColumnarBatch(vecs, s.numRows()) + case (_: ColumnarBatch, _: InternalRow) => throw new IllegalStateException("InternalRow ColumnVector mismatch") + case (_: InternalRow, _: ColumnarBatch) => throw new IllegalStateException("InternalRow ColumnVector mismatch") + case (s: InternalRow, d: InternalRow) => combinedRow(s, d) + } + } + + override def close(): Unit = { + skeletonFileIterator.close() + dataFileIterator.close() + } + }.asInstanceOf[ClosableIterator[InternalRow]] + } } } + +object SparkFileFormatInternalRowReaderContext { + // From "namedExpressions.scala": Used to construct to record position field metadata. + private val FILE_SOURCE_GENERATED_METADATA_COL_ATTR_KEY = "__file_source_generated_metadata_col" + private val FILE_SOURCE_METADATA_COL_ATTR_KEY = "__file_source_metadata_col" + private val METADATA_COL_ATTR_KEY = "__metadata_col" + + def getAppliedRequiredSchema(requiredSchema: StructType, shouldAddRecordPosition: Boolean): StructType = { + if (shouldAddRecordPosition) { + val metadata = new MetadataBuilder() + .putString(METADATA_COL_ATTR_KEY, ROW_INDEX_TEMPORARY_COLUMN_NAME) + .putBoolean(FILE_SOURCE_METADATA_COL_ATTR_KEY, value = true) + .putString(FILE_SOURCE_GENERATED_METADATA_COL_ATTR_KEY, ROW_INDEX_TEMPORARY_COLUMN_NAME) + .build() + val rowIndexField = StructField(ROW_INDEX_TEMPORARY_COLUMN_NAME, LongType, nullable = false, metadata) + StructType(requiredSchema.fields.filterNot(isIndexTempColumn) :+ rowIndexField) + } else { + requiredSchema + } + } + + /** + * Only valid if there is support for record positions and no log files Review Comment: yes -- This is an automated message from the Apache Git Service. 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