sunchao commented on a change in pull request #35068: URL: https://github.com/apache/spark/pull/35068#discussion_r784388461
########## File path: sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ConstantColumnVector.java ########## @@ -0,0 +1,264 @@ +/* + * 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.spark.sql.execution.vectorized; + +import org.apache.spark.sql.types.*; +import org.apache.spark.sql.vectorized.ColumnVector; +import org.apache.spark.sql.vectorized.ColumnarArray; +import org.apache.spark.sql.vectorized.ColumnarMap; +import org.apache.spark.unsafe.types.UTF8String; + +import java.math.BigDecimal; +import java.math.BigInteger; + +/** + * This class adds the constant support to ColumnVector. + * It supports all the types and contains put APIs, + * which will put the exact same value to all rows. + * + * Capacity: The vector only stores one copy of the data, and acts as an unbounded vector + * (get from any row will return the same value) + */ +public class ConstantColumnVector extends ColumnVector { + + private byte nullData; + private byte byteData; + private short shortData; + private int intData; + private long longData; + private float floatData; + private double doubleData; + private byte[] byteArrayData; + private ConstantColumnVector[] childData; + private ColumnarArray arrayData; + private ColumnarMap mapData; + + private int numRows; + + public ConstantColumnVector(int numRows, DataType type) { Review comment: `WritableColumnVector` already has a way to set constant via `setIsConstant`. Have you looked at it? -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
