Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/12098#discussion_r58140706
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala ---
@@ -318,25 +292,32 @@ private[sql] case class DataSourceScan(
| }
| }""".stripMargin)
- val value = ctx.freshName("value")
s"""
| if ($batch != null) {
| $scanBatches();
- | } else if ($input.hasNext()) {
- | Object $value = $input.next();
- | if ($value instanceof $columnarBatchClz) {
- | $batch = ($columnarBatchClz)$value;
+ | } else {
+ | long $getBatchStart = System.nanoTime();
+ | if ($input.hasNext()) {
+ | $batch = ($columnarBatchClz)$input.next();
+ | $scanTimeTotalNs += System.nanoTime() - $getBatchStart;
| $scanBatches();
- | } else {
- | $scanRows((InternalRow) $value);
| }
| }
""".stripMargin
} else {
+ val row = ctx.freshName("row")
+ val exprRows =
+ output.zipWithIndex.map(x => new BoundReference(x._2,
x._1.dataType, x._1.nullable))
+ ctx.INPUT_ROW = row
+ ctx.currentVars = null
+ val columnsRowInput = exprRows.map(_.gen(ctx))
+ val inputRow = if (outputUnsafeRows) row else null
s"""
- |if ($input.hasNext()) {
- | $scanRows((InternalRow) $input.next());
- |}
+ | while (!shouldStop() && $input.hasNext()) {
--- End diff --
Should we put !shouldStop() into the end of the while-loop to avoid
performance degradation?
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