richardstartin commented on a change in pull request #8264: URL: https://github.com/apache/pinot/pull/8264#discussion_r830054309
########## File path: pinot-core/src/main/java/org/apache/pinot/core/operator/transform/function/IsNullTransformFunction.java ########## @@ -0,0 +1,97 @@ +/** + * 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.pinot.core.operator.transform.function; + +import com.google.common.base.Preconditions; +import java.util.Arrays; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import org.apache.pinot.core.operator.blocks.ProjectionBlock; +import org.apache.pinot.core.operator.transform.TransformResultMetadata; +import org.apache.pinot.segment.spi.datasource.DataSource; +import org.apache.pinot.segment.spi.index.reader.NullValueVectorReader; +import org.roaringbitmap.PeekableIntIterator; + + +public class IsNullTransformFunction extends BaseTransformFunction { + public static final String FUNCTION_NAME = "IS_NULL"; + + private TransformFunction _leftTransformFunction; + private int[] _results; + private Map<String, DataSource> _dataSourceMap = new HashMap<>(); + private PeekableIntIterator _nullValueVectorIterator; + private NullValueVectorReader _nullValueVectorReader; + + @Override + public String getName() { + return FUNCTION_NAME; + } + + @Override + public void init(List<TransformFunction> arguments, Map<String, DataSource> dataSourceMap) { + Preconditions.checkArgument(arguments.size() == 1, "Exact 1 argument is required for IS_NULL operator function"); + _leftTransformFunction = arguments.get(0); + if (!(_leftTransformFunction instanceof IdentifierTransformFunction)) { + throw new IllegalArgumentException( + "Only column names are supported in IS_NULL. Support for functions is planned for future release"); + } + _dataSourceMap = dataSourceMap; + String columnName = ((IdentifierTransformFunction) _leftTransformFunction).getColumnName(); + _nullValueVectorReader = _dataSourceMap.get(columnName).getNullValueVector(); + if (_nullValueVectorReader != null) { + _nullValueVectorIterator = _nullValueVectorReader.getNullBitmap().getIntIterator(); + } else { + _nullValueVectorIterator = null; + } + } + + @Override + public TransformResultMetadata getResultMetadata() { + return BOOLEAN_SV_NO_DICTIONARY_METADATA; + } + + @Override + public int[] transformToIntValuesSV(ProjectionBlock projectionBlock) { + int length = projectionBlock.getNumDocs(); + _results = new int[length]; Review comment: Shouldn't this check if it can reuse the array? I imagine you did this for a reason. -- 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: commits-unsubscr...@pinot.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org
