[GitHub] [iceberg] liubo1022126 commented on a change in pull request #3784: ORC:ORC supports rolling writers.

[GitBox <gi...@apache.org>]

liubo1022126 commented on a change in pull request #3784:
URL: https://github.com/apache/iceberg/pull/3784#discussion_r787484336



##########
File path: orc/src/main/java/org/apache/iceberg/orc/OrcFileAppender.java
##########
@@ -99,9 +104,34 @@ public Metrics metrics() {
 
   @Override
   public long length() {
-    Preconditions.checkState(isClosed,
-        "Cannot return length while appending to an open file.");
-    return file.toInputFile().getLength();
+    if (isClosed) {
+      return file.toInputFile().getLength();
+    }
+    if (this.treeWriter != null) {
+      if (batch.size > 0) {
+        try {
+          writer.addRowBatch(batch);
+          batch.reset();

Review comment:
       Because we check RollToNewFile when we process every record, so if you flush batch here, does it mean that each piece of data will be flushed during processing?




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