davisusanibar commented on issue #35585: URL: https://github.com/apache/arrow/issues/35585#issuecomment-1683045712
Hi @i10416, sorry to join late, There is a [VectorAppender](https://github.com/apache/arrow/blob/main/java/vector/src/main/java/org/apache/arrow/vector/util/VectorAppender.java) class with some util methods, main problem it is private-package. Class inside custom package: ```java package org.apache.arrow.vector.util; import org.apache.arrow.memory.BufferAllocator; import org.apache.arrow.memory.RootAllocator; import org.apache.arrow.vector.IntVector; import org.apache.arrow.vector.ValueVector; public class FieldVectorAppender { public static void main(String[] args) { try ( BufferAllocator allocator = new RootAllocator(); IntVector initialValues = new IntVector("initialValues", allocator); IntVector toAppend = new IntVector("toAppend", allocator); ) { initialValues.allocateNew(2); initialValues.set(0, 1); initialValues.set(1, 2); initialValues.setValueCount(2); System.out.println("Initial IntVector: " + initialValues); toAppend.allocateNew(4); toAppend.set(1, 4); toAppend.set(3, 6); toAppend.setValueCount(4); System.out.println("IntVector to Append: " + toAppend); VectorAppender appenderUtil = new VectorAppender(initialValues); ValueVector resultOfVectorsAppended = toAppend.accept(appenderUtil, null); System.out.println("IntVector Result: " + resultOfVectorsAppended); } } } ``` Test: ```shell Initial IntVector: [1, 2] IntVector to Append: [null, 4, null, 6] IntVector Result: [1, 2, null, 4, null, 6] ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
