aloyszhang commented on code in PR #10925: URL: https://github.com/apache/inlong/pull/10925#discussion_r1735987352
########## inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/DateDiffFunction.java: ########## @@ -0,0 +1,89 @@ +/* + * 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.inlong.sdk.transform.process.function; + +import org.apache.inlong.sdk.transform.decode.SourceData; +import org.apache.inlong.sdk.transform.process.Context; +import org.apache.inlong.sdk.transform.process.operator.OperatorTools; +import org.apache.inlong.sdk.transform.process.parser.ValueParser; + +import net.sf.jsqlparser.expression.Expression; +import net.sf.jsqlparser.expression.Function; + +import java.time.LocalDate; +import java.time.LocalDateTime; +import java.time.format.DateTimeFormatter; +import java.time.temporal.ChronoUnit; +import java.util.List; + +/** + * DateDiffFunction + * description: DATEDIFF(d1, d2) + * - return null if one of the two parameters is null or "" + * - return null if one of the two parameters has an incorrect date format + * - return the number of days between the dates d1->d2. + */ +@TransformFunction(names = {"datediff", "date_diff"}) +public class DateDiffFunction implements ValueParser { + + private final ValueParser leftDateParser; + private final ValueParser rightDateParser; + private static final DateTimeFormatter DEFAULT_FORMAT_DATE_TIME = + DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"); + private static final DateTimeFormatter DEFAULT_FORMAT_DATE = DateTimeFormatter.ofPattern("yyyy-MM-dd"); + + public DateDiffFunction(Function expr) { + List<Expression> expressions = expr.getParameters().getExpressions(); + leftDateParser = OperatorTools.buildParser(expressions.get(0)); + rightDateParser = OperatorTools.buildParser(expressions.get(1)); + } + + @Override + public Object parse(SourceData sourceData, int rowIndex, Context context) { + Object leftDateObj = leftDateParser.parse(sourceData, rowIndex, context); + Object rightDateObj = rightDateParser.parse(sourceData, rowIndex, context); + if (leftDateObj == null || rightDateObj == null) { + return null; + } + String leftDate = OperatorTools.parseString(leftDateObj); + String rightDate = OperatorTools.parseString(rightDateObj); + if (leftDate.isEmpty() || rightDate.isEmpty()) { + return null; + } + try { + LocalDate left = getLocalDate(leftDate); + LocalDate right = getLocalDate(rightDate); + return ChronoUnit.DAYS.between(right, left); + } catch (Exception e) { Review Comment: Better to print some logs here for trouble shooting. -- 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...@inlong.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
