flyrain commented on a change in pull request #3287:
URL: https://github.com/apache/iceberg/pull/3287#discussion_r734714224



##########
File path: 
spark/v3.0/spark3/src/main/java/org/apache/iceberg/spark/data/vectorized/ColumnVectorWithFilter.java
##########
@@ -0,0 +1,120 @@
+/*
+ * 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.spark.data.vectorized;
+
+import org.apache.iceberg.arrow.vectorized.VectorHolder;
+import org.apache.iceberg.arrow.vectorized.VectorHolder.ConstantVectorHolder;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.types.Types;
+import org.apache.spark.sql.types.Decimal;
+import org.apache.spark.sql.vectorized.ColumnVector;
+import org.apache.spark.sql.vectorized.ColumnarArray;
+import org.apache.spark.unsafe.types.UTF8String;
+
+public class ColumnVectorWithFilter extends IcebergArrowColumnVector {
+  private int[] rowIdMapping;
+  private int numRows;
+
+  public ColumnVectorWithFilter(VectorHolder holder, int[] rowIdMapping, int 
numRows) {
+    super(holder);
+    this.rowIdMapping = rowIdMapping;
+    this.numRows = numRows;
+  }
+
+  public void setRowIdMapping(int[] rowIdMapping) {
+    this.rowIdMapping = rowIdMapping;
+  }
+
+  @Override
+  public boolean isNullAt(int rowId) {
+    return nullabilityHolder().isNullAt(realRowId(rowId)) == 1;

Review comment:
       Not sure I understand. We have to override these `getXXX` methods, 
right? One way to simplify it, is to do something like this. So that we don't 
have to reimplement certain logic and expose fields `accessor` and 
`nullabilityHolder`
   ```
     @Override
     public int getInt(int rowId) {
       return super.getInt(rowIdMapping[rowId]);
     }
   ```




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