Cpaulyz commented on code in PR #15136: URL: https://github.com/apache/iotdb/pull/15136#discussion_r2020558973
########## iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/udf/builtin/relational/tvf/CapacityTableFunction.java: ########## @@ -0,0 +1,123 @@ +/* + * 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.iotdb.commons.udf.builtin.relational.tvf; + +import org.apache.iotdb.udf.api.exception.UDFException; +import org.apache.iotdb.udf.api.relational.TableFunction; +import org.apache.iotdb.udf.api.relational.access.Record; +import org.apache.iotdb.udf.api.relational.table.TableFunctionAnalysis; +import org.apache.iotdb.udf.api.relational.table.TableFunctionProcessorProvider; +import org.apache.iotdb.udf.api.relational.table.argument.Argument; +import org.apache.iotdb.udf.api.relational.table.argument.DescribedSchema; +import org.apache.iotdb.udf.api.relational.table.argument.ScalarArgument; +import org.apache.iotdb.udf.api.relational.table.processor.TableFunctionDataProcessor; +import org.apache.iotdb.udf.api.relational.table.specification.ParameterSpecification; +import org.apache.iotdb.udf.api.relational.table.specification.ScalarParameterSpecification; +import org.apache.iotdb.udf.api.relational.table.specification.TableParameterSpecification; +import org.apache.iotdb.udf.api.type.Type; + +import org.apache.tsfile.block.column.ColumnBuilder; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Map; + +public class CapacityTableFunction implements TableFunction { + private static final String DATA_PARAMETER_NAME = "DATA"; + private static final String SIZE_PARAMETER_NAME = "SIZE"; + + @Override + public List<ParameterSpecification> getArgumentsSpecifications() { + return Arrays.asList( + TableParameterSpecification.builder() + .name(DATA_PARAMETER_NAME) + .passThroughColumns() + .build(), + ScalarParameterSpecification.builder().name(SIZE_PARAMETER_NAME).type(Type.INT64).build()); + } + + @Override + public TableFunctionAnalysis analyze(Map<String, Argument> arguments) throws UDFException { + long size = (long) ((ScalarArgument) arguments.get(SIZE_PARAMETER_NAME)).getValue(); + if (size <= 0) { + throw new UDFException("Size must be greater than 0"); + } + return TableFunctionAnalysis.builder() + .properColumnSchema( + new DescribedSchema.Builder().addField("window_index", Type.INT64).build()) + .requireRecordSnapshot(false) + .requiredColumns(DATA_PARAMETER_NAME, Collections.singletonList(0)) + .build(); + } + + @Override + public TableFunctionProcessorProvider getProcessorProvider(Map<String, Argument> arguments) { + long sz = (long) ((ScalarArgument) arguments.get(SIZE_PARAMETER_NAME)).getValue(); + return new TableFunctionProcessorProvider() { + @Override + public TableFunctionDataProcessor getDataProcessor() { + return new CountDataProcessor(sz); + } + }; + } + + private static class CountDataProcessor implements TableFunctionDataProcessor { + + private final long size; + private final List<Long> currentRowIndexes = new ArrayList<>(); Review Comment: Good idea! Change ` List<Long> currentRowIndexes ` to `long currentStartIndex` -- 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]
