例如:TIMESTAMPDIFF(DAY, TIMESTAMP '2022-02-11 10:00:00', TIMESTAMP '2022-02-13 10:00:00'),返回:2 使用例子: 函数名:CONVERT_TZ(string1, string2, string3) 函数说明: 将datetime string1(使用默认的ISO时间戳格式'yyyy-MM-dd HH:mm:ss...
分别使用AssignerWithPeriodicWatermarks和AssignerWithPunctuatedWatermarks来实现// 这里使用周期性产生WaterMark,延长2秒.assignTimestampsAndWatermarks(new BoundedOutOfOrdernessTimestampExtractor[String](Time.seconds
有些代码中,设置时间使用的是timeWindow而非window,比如,input.keyBy(...).timeWindow(Time.seconds(1))。timeWindow是一种简写。当我们在执行环境设置了TimeCharacteristic.EventTime时,Flink对应调用TumblingEventTimeWindows;如果我们基于TimeCharacteristic.ProcessingTime,Flink使用TumblingProcessingTimeWindows。 滑动窗口 滑...
@PublicpublicinterfaceWatermarkGenerator<T>{/** * Called for every event, allows the watermark generator to examine and remember the * event timestamps, or to emit a watermark based on the event itself. */voidonEvent(Tevent,long eventTimestamp,WatermarkOutput output);/** * Called periodically...
// 设置TableSchema @Override public TableSchema getTableSchema() { return new TableSchema( new String[] {"key", "rowtime", "rowtime_string"}, new TypeInformation[] {, Types.SQL_TIMESTAMP, Types.STRING}); } @Override public String explainSource() { return "GeneratorTableSource"; } // ...
TIMESTAMP <-> STRING TIMESTAMP 和 STRING 进行互转时, 默认使用的都是 UTC-0 时区 -- 将 TIMESTAMP 类型按照指定的格式转换为 STRINGDATE_FORMAT(timestamp_field,'yyyy-MM-dd hh:mm:ss')-- 将 STRING 类型字段转换为 TIMESTAMP 类型TO_TIMESTAMP(string_field,'yyyy-MM-dd hh:mm:ss') ...
TIMESTAMP string 以yyyy-MM-dd HH:mm:ss[.SSS]的形式返回从字符串解析的SQL时间戳。 INTERVAL string range 从dd hh:mm:ss.fff形式的字符串解析SQL 毫秒间隔或者从yyyy-mm形式的字符串解析 SQL月数间隔。 LOCALTIME 返回本地时区的当前SQL时间,返回类型为 TIME(0)。 LOCALTIMESTAMP 返回本地时区的当前SQL时...
CREATETABLEorders(order_idSTRING,currencySTRING,amountINT,order_timeTIMESTAMP(3),WATERMARKFORorder_timeASorder_time-INTERVAL'30'SECOND)WITH(…);--Table backed by a Kafka compacted topicCREATETABLElatest_rates(currencySTRING,rateDECIMAL(38,10),currency_timeTIMESTAMP(3),WATERMARKFORcurrency_timeAScurrenc...
{ //发生异常,将数据写入测输出流 context.output(outputTag, s); } } }); jsonObjDs.getSideOutput(outputTag).print("Parse Err Data>>>"); jsonObjDs.getSideOutput(otherOutputTag).print("Other Data>>>"); jsonObjDs.map(r -> r.toJSONString()).addSink(MyKafkaUtil.getKafkaProducer("dwd...
当我们执行INSERT INTOCREATE CATALOG paimon WITH (‘type’ = ‘paimon’,‘warehouse’ = ‘file:///tmp/paimon’);USE CATALOG paimon;CREATE TABLE T (id BIGINT,a INT,b STRING,dt STRING COMMENT ‘timestamp string in format yyyyMMdd’,PRIMARY KEY(id, dt) NOT ENFORCED) PARTITIONED BY (dt);...