ORC:ORC supports rolling writers.

build.gradle

@@ -449,6 +449,7 @@ project(':iceberg-orc') {
   dependencies {
     implementation project(path: ':iceberg-bundled-guava', configuration: 'shadow')
     api project(':iceberg-api')
+    implementation project(':iceberg-common')
     implementation project(':iceberg-core')
     implementation("org.apache.avro:avro") {
       exclude group: 'org.tukaani' // xz compression is not supported

core/src/main/java/org/apache/iceberg/io/BaseTaskWriter.java

@@ -275,9 +275,7 @@ private void openCurrent() {
     }
 
     private boolean shouldRollToNewFile() {
-      // TODO: ORC file now not support target file size before closed
-      return !format.equals(FileFormat.ORC) &&
-          currentRows % ROWS_DIVISOR == 0 && length(currentWriter) >= targetFileSize;
+      return currentRows % ROWS_DIVISOR == 0 && length(currentWriter) >= targetFileSize;
     }
 
     private void closeCurrent() throws IOException {

core/src/main/java/org/apache/iceberg/io/ClusteredDataWriter.java

@@ -24,7 +24,6 @@
 import org.apache.iceberg.FileFormat;
 import org.apache.iceberg.PartitionSpec;
 import org.apache.iceberg.StructLike;
-import org.apache.iceberg.encryption.EncryptedOutputFile;
 import org.apache.iceberg.relocated.com.google.common.collect.Lists;
 
 /**
@@ -52,13 +51,7 @@ public ClusteredDataWriter(FileWriterFactory<T> writerFactory, OutputFileFactory
 
   @Override
   protected FileWriter<T, DataWriteResult> newWriter(PartitionSpec spec, StructLike partition) {
-    // TODO: support ORC rolling writers
-    if (fileFormat == FileFormat.ORC) {
-      EncryptedOutputFile outputFile = newOutputFile(fileFactory, spec, partition);
-      return writerFactory.newDataWriter(outputFile, spec, partition);
-    } else {
-      return new RollingDataWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
-    }
+    return new RollingDataWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
   }
 
   @Override

core/src/main/java/org/apache/iceberg/io/ClusteredEqualityDeleteWriter.java

@@ -24,7 +24,6 @@
 import org.apache.iceberg.FileFormat;
 import org.apache.iceberg.PartitionSpec;
 import org.apache.iceberg.StructLike;
-import org.apache.iceberg.encryption.EncryptedOutputFile;
 import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
 import org.apache.iceberg.relocated.com.google.common.collect.Lists;
 
@@ -53,13 +52,7 @@ public ClusteredEqualityDeleteWriter(FileWriterFactory<T> writerFactory, OutputF
 
   @Override
   protected FileWriter<T, DeleteWriteResult> newWriter(PartitionSpec spec, StructLike partition) {
-    // TODO: support ORC rolling writers
-    if (fileFormat == FileFormat.ORC) {
-      EncryptedOutputFile outputFile = newOutputFile(fileFactory, spec, partition);
-      return writerFactory.newEqualityDeleteWriter(outputFile, spec, partition);
-    } else {
-      return new RollingEqualityDeleteWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
-    }
+    return new RollingEqualityDeleteWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
   }
 
   @Override

core/src/main/java/org/apache/iceberg/io/ClusteredPositionDeleteWriter.java

@@ -25,7 +25,6 @@
 import org.apache.iceberg.PartitionSpec;
 import org.apache.iceberg.StructLike;
 import org.apache.iceberg.deletes.PositionDelete;
-import org.apache.iceberg.encryption.EncryptedOutputFile;
 import org.apache.iceberg.relocated.com.google.common.collect.Lists;
 import org.apache.iceberg.util.CharSequenceSet;
 
@@ -56,13 +55,7 @@ public ClusteredPositionDeleteWriter(FileWriterFactory<T> writerFactory, OutputF
 
   @Override
   protected FileWriter<PositionDelete<T>, DeleteWriteResult> newWriter(PartitionSpec spec, StructLike partition) {
-    // TODO: support ORC rolling writers
-    if (fileFormat == FileFormat.ORC) {
-      EncryptedOutputFile outputFile = newOutputFile(fileFactory, spec, partition);
-      return writerFactory.newPositionDeleteWriter(outputFile, spec, partition);
-    } else {
-      return new RollingPositionDeleteWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
-    }
+    return new RollingPositionDeleteWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
   }
 
   @Override

core/src/main/java/org/apache/iceberg/io/FanoutDataWriter.java

@@ -24,7 +24,6 @@
 import org.apache.iceberg.FileFormat;
 import org.apache.iceberg.PartitionSpec;
 import org.apache.iceberg.StructLike;
-import org.apache.iceberg.encryption.EncryptedOutputFile;
 import org.apache.iceberg.relocated.com.google.common.collect.Lists;
 
 /**
@@ -52,13 +51,7 @@ public FanoutDataWriter(FileWriterFactory<T> writerFactory, OutputFileFactory fi
 
   @Override
   protected FileWriter<T, DataWriteResult> newWriter(PartitionSpec spec, StructLike partition) {
-    // TODO: support ORC rolling writers
-    if (fileFormat == FileFormat.ORC) {
-      EncryptedOutputFile outputFile = newOutputFile(fileFactory, spec, partition);
-      return writerFactory.newDataWriter(outputFile, spec, partition);
-    } else {
-      return new RollingDataWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
-    }
+    return new RollingDataWriter<>(writerFactory, fileFactory, io, targetFileSizeInBytes, spec, partition);
   }
 
   @Override

data/src/test/java/org/apache/iceberg/io/TestBaseTaskWriter.java

@@ -58,6 +58,7 @@ public class TestBaseTaskWriter extends TableTestBase {
   public static Object[][] parameters() {
     return new Object[][] {
         {"avro"},
+        {"orc"},
         {"parquet"}
     };
   }

data/src/test/java/org/apache/iceberg/io/TestRollingFileWriters.java

@@ -30,7 +30,6 @@
 import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList;
 import org.apache.iceberg.relocated.com.google.common.collect.Lists;
 import org.junit.Assert;
-import org.junit.Assume;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -39,15 +38,15 @@
 @RunWith(Parameterized.class)
 public abstract class TestRollingFileWriters<T> extends WriterTestBase<T> {
 
-  // TODO: add ORC once we support ORC rolling file writers
-
   @Parameterized.Parameters(name = "FileFormat={0}, Partitioned={1}")
   public static Object[] parameters() {
     return new Object[][] {
         new Object[]{FileFormat.AVRO, false},
         new Object[]{FileFormat.AVRO, true},
         new Object[]{FileFormat.PARQUET, false},
         new Object[]{FileFormat.PARQUET, true},
+        new Object[]{FileFormat.ORC, false},
+        new Object[]{FileFormat.ORC, true}
     };
   }
 
@@ -129,8 +128,6 @@ public void testRollingDataWriterSplitData() throws IOException {
 
   @Test
   public void testRollingEqualityDeleteWriterNoRecords() throws IOException {
-    Assume.assumeFalse("ORC delete files are not supported", fileFormat == FileFormat.ORC);
-
     List<Integer> equalityFieldIds = ImmutableList.of(table.schema().findField("id").fieldId());
     Schema equalityDeleteRowSchema = table.schema().select("id");
     FileWriterFactory<T> writerFactory = newWriterFactory(table.schema(), equalityFieldIds, equalityDeleteRowSchema);

flink/v1.14/flink/src/test/java/org/apache/iceberg/flink/actions/TestRewriteDataFilesAction.java

@@ -23,6 +23,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
+import java.util.UUID;
 import java.util.stream.Collectors;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.flink.configuration.CoreOptions;
@@ -50,7 +51,6 @@
 import org.apache.iceberg.types.Types;
 import org.junit.After;
 import org.junit.Assert;
-import org.junit.Assume;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -322,7 +322,6 @@ public void testRewriteLargeTableHasResiduals() throws IOException {
    */
   @Test
   public void testRewriteAvoidRepeateCompress() throws IOException {
-    Assume.assumeFalse("ORC does not support getting length when file is opening", format.equals(FileFormat.ORC));
     List<Record> expected = Lists.newArrayList();
     Schema schema = icebergTableUnPartitioned.schema();
     GenericAppenderFactory genericAppenderFactory = new GenericAppenderFactory(schema);
@@ -331,7 +330,7 @@ public void testRewriteAvoidRepeateCompress() throws IOException {
     try (FileAppender<Record> fileAppender = genericAppenderFactory.newAppender(Files.localOutput(file), format)) {
       long filesize = 20000;
       for (; fileAppender.length() < filesize; count++) {
-        Record record = SimpleDataUtil.createRecord(count, "iceberg");
+        Record record = SimpleDataUtil.createRecord(count, UUID.randomUUID().toString());
         fileAppender.add(record);
         expected.add(record);
       }

flink/v1.14/flink/src/test/java/org/apache/iceberg/flink/sink/TestIcebergStreamWriter.java

@@ -233,10 +233,6 @@ public void testBoundedStreamCloseWithEmittingDataFiles() throws Exception {
 
   @Test
   public void testTableWithTargetFileSize() throws Exception {
-    // TODO: ORC file does not support target file size before closed.
-    if (format == FileFormat.ORC) {
-      return;
-    }
     // Adjust the target-file-size in table properties.
     table.updateProperties()
         .set(TableProperties.WRITE_TARGET_FILE_SIZE_BYTES, "4") // ~4 bytes; low enough to trigger

flink/v1.14/flink/src/test/java/org/apache/iceberg/flink/sink/TestTaskWriters.java

@@ -183,10 +183,6 @@ public void testCompleteFiles() throws IOException {
 
   @Test
   public void testRollingWithTargetFileSize() throws IOException {
-    // TODO ORC don't support target file size before closed.
-    if (format == FileFormat.ORC) {
-      return;
-    }
     try (TaskWriter<RowData> taskWriter = createTaskWriter(4)) {
       List<RowData> rows = Lists.newArrayListWithCapacity(8000);
       List<Record> records = Lists.newArrayListWithCapacity(8000);

orc/src/main/java/org/apache/iceberg/orc/EstimateOrcAvgWidthVisitor.java

@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.iceberg.orc;
+
+import java.util.List;
+import java.util.Optional;
+import org.apache.orc.TypeDescription;
+
+public class EstimateOrcAvgWidthVisitor extends OrcSchemaVisitor<Integer> {
+
+  @Override
+  public Integer record(TypeDescription record, List<String> names, List<Integer> fieldWidths) {
+    return fieldWidths.stream().reduce(Integer::sum).orElse(0);
+  }
+
+  @Override
+  public Integer list(TypeDescription array, Integer elementWidth) {
+    return elementWidth;
+  }
+
+  @Override
+  public Integer map(TypeDescription map, Integer keyWidth, Integer valueWidth) {
+    return keyWidth + valueWidth;
+  }
+
+  @Override
+  public Integer primitive(TypeDescription primitive) {
+    Optional<Integer> icebergIdOpt = ORCSchemaUtil.icebergID(primitive);
+
+    if (!icebergIdOpt.isPresent()) {
+      return 0;
+    }
+
+    switch (primitive.getCategory()) {
+      case BYTE:
+      case CHAR:
+      case SHORT:
+      case INT:
+      case FLOAT:
+      case BOOLEAN:
+      case LONG:
+      case DOUBLE:
+      case DATE:
+        return 8;
+      case TIMESTAMP:
+      case TIMESTAMP_INSTANT:
+        return 12;
+      case STRING:
+      case VARCHAR:
+      case BINARY:
+        return 128;
+      case DECIMAL:
+        return primitive.getPrecision() + 2;
+      default:
+        throw new IllegalArgumentException("Can't handle " + primitive);
+    }
+  }
+}